Configure dhcp on cisco router


configure dhcp on cisco router 100. The following Oct 14, 2014 · Router#clear ip dhcp binding * If you want to clear a certain binding not all of them, replace the * in the previous command with the IP address to be cleared. 5. May 20, 2018 · The objective of this Lab is to configure multiple dhcp servers for vlans on the router to service hosts in different vlans. 0 255. But the point to note here is that a device connected to the network must be configured to obtain the TCP/IP settings automatic IP address. 254. 1/1 TrainingCisco DHCP Naming covention for devices password Router--- for specific user username : cisco password : [router+number]--- for line console 0 password : [console0+router name] # How to Set up a DHCP Service on Cisco ROuter 1. Configuring a router's interface as a DHCP relay agent is much easier than you might think. I use a cable modem, so the next line allows DHCP (bootps and bootpc) traffic to enter the WAN interface. The first thing you need to do is identifying the interface facing the clients on the remote router. 168. 255. Define the default You want to change the default lease period on your router. 0 ‘ . Router(dhcp-config)# netbios-name-server 192. …. 168. 1. Here's how. 168. DHCP POOL creation for network 1. Router#config t. The ip helper-address configuration command allows the router to forward local DHCP requests to one or more centralized DHCP servers: Router1# configure terminal Enter configuration commands, one per line. 168. 255. Scenario. 0 255. …Fortunately, this is quite easy to configure…on Cisco routers. 0. We do this with the “IP helper-address” command. For DHCP server to dynamically distributing network configuration parameters to clients computers locate in another separated VLANs which are VLAN20 and VLAN30, we need to configure DHCP relay on Cisco L3 switch. Configuring L2TP on a Cisco router allows companies to save money in terms of the price of the solution, but at the same time has more restrictions than configuring other types of connections, for example, Cisco To configure DHCP Option 43 for Cisco 1000, 1500, and 1550 series access points in the embedded Cisco IOS DHCP server, follow these steps: Step 1 Enter configuration mode at the Cisco IOS command line interface (CLI). 224. 1 See full list on techrepublic. 168. 1 ! define a WINS server if you have one. x, country=1, language=1, layer2tagging=0, vlanid=0". 0. b. 8. Some service providers might ask you to use a client-id or a hostname of their own choice. This command enables DHCP services on the router and specifies the various DHCP options the server will assign to clients. As an administrator, you can configure your Cisco 800 series router to act as a DHCP server, providing IP address assignment and other TCP/IP-oriented configuration information to your workstations. Two DNS servers are configured. Setup this network: Router>enable Router#config t Router (config)#int fa 0/0 Router (config-if)#ip address 192. 168. 9 Jul 2017 Configuring DHCP on Router(CISCO Packet Tracer). I have recently setup NPS for a client for laptop remediation services. 20. 10. 168. 1. 1 192. 1 192. ip dhcp pool "pool-name" # creating a dhcp pool named "pool-name" 2. 255. There is a router  ip dhcp pool pool1 network 10. Solution. Create the user. Configure your LAN interface, in this example we are configuring the LAN to use the default VLAN, connected by the ISR 891's integrated 8-port 10/100 switch ports (FE LAN 0 - 7 aka FastEthernet0-7). 1q encapsulation on the router and the assignment of IP addresses from different subnets to the sub-interfaces. T. Use the Command “Import all”. 1. 10. Router(dhcp-config)# exit !The following addresses will not be given out to clients. 100. 0 Router(dhcp-config)# default-router 172. 0. 168. On a Cisco router use the following commands to create a pool of IP addresses with a DHCP IP address exclusion. 10 There are three primary steps to setting up DDNS on a Cisco IOS router. 1 dns-server 8. End with CNTL/Z. Cisco IOS Router Acting as a DHCP Relay Agent. (R1 and R2 are directly connected via Ethernet) Server Configuration (R1) !– enable dhcp server (default) service dhcp … Router# clear ip dhcp binding * On the Host . 0. This post is about configuring a CISCO 2951 router to act as a DHCP server in your network. Many of the parameters and options defined in the RFC are present and available in IOS routers. 1. …I'll configure Gi0/1 to act as a DHCP client to an ISP. Sets the host name. In this article, you will learn how to configure Cisco Router as DHCP server using CLI and to update it on multiple devices simultaneously in NCM application using configlets. XXX. Step-by-step instructions with detailed command parameters will ensure you get the full picture. 0. 10. Jul 04, 2015 · The global configuration mode command service dhcp is used to enable DHCP service on router. Automates DHCP Configuration on Used Cisco Routers. Dec 23, 2020 - In this article, we will examine the steps of configuring DHCP Relay Agent on a Cisco Router with the GNS3 simulator. 0 and POOL CCNA. 1. also provides high-quality Jan 08, 2005 · The Cisco DHCP implementation assumes that all addresses in the configured subnet are available for use. You can replace the subnet mask by a (/PREFIX) to provide the subnet mask. Router(dhcp-config)# netbios-name-server 192. 100. 8 Router (dhcp-config)#exit Router (config)#ip dhcp excluded-address 192. I have recently setup NPS for a client for laptop remediation services. 3. 254; Part 2: Configure DHCP Relay Step 1: Configure R1 and R3 as a DHCP relay agent. 168. The DHCP server locates in VLAN 10. 10. 0 default-router 10. 1. First, we'll need to enter configuration mode on our ISR router. 0. 30. 3. Cisco IOS devices can be configured as DHCP servers and it’s also possible to configure a static binding for certain hosts. Part 2: Configure DHCP Relay. Use this in real time or other simulators like gns3. 1/ 8. R2(config)# interface FastEthernet0/0 R2(config-if)# no ip address R2(config-if)# ip address dhcp R2(config-if)# end R2# %SYS-5-CONFIG_I: Configured from console by console R2# %DHCP-6-ADDRESS_ASSIGN: Interface FastEthernet0/0 assigned DHCP address 10. The DHCP options implemented are default-router (DHCP option 3) and dns-server (DHCP option 6). 100. 168. I am trying to set up a cisco 2800 series What is DHCP? In a network all the Layer 3 devices need to have an IP address. R2(dhcp-config)# network 192. We will start by configuring sub-interfaces with 802. NET Aug 15, 2013 · Here’s how you would configure dhcp on cisco routers: Step 1 – ssh login, get on the console, or use telnet if that is enabled to the cisco router # ssh -l <username> <ipaddress of the Cisco router> Step 2 – Enter configuration mode myrouter# config t. Configuring DHCP Objective Configure a router for Dynamic Host Configuration Protocol (DHCP) to dynamically assign addresses to attached hosts. 0 default-router 192. Core router configuration: Mar 29, 2020 · Here we completely demonstrate the Inter-VLAN configuration using a Cisco router and a layer 3 switch. This can be done with the ip address dhcp command. YYY. 10. Configure appropriate options for DHCP clients: Router(dhcp-config)domain-name soundtraining. On your router you will need to configure a DHCP-helper agent, sometimes called a dhcp-relay agent. 1 Router (dhcp-config)#dns-server 8. Mar 24, 2014 · DHCP (dynamic host configuration protocol) is used for dynamically assigning network addresses to hosts. Open the router CLI and assign IP address to the port which is connected with switch to Configure Router as DHCP server. 116. conf t. A Cisco router can be either a DHCP client or a DHCP server. 168. 255 # defining network address and netmask 3. However, a Cisco router can be configured to We’ll specify a boot server (option 66) just to show how it is done and that Cisco equipment can handle it. 0 S1(dhcp-config)# default-router 192. In this lab, you will configure the DHCP and NAT IP services. 1 192. This way, the ISP can provide the IP information to the client device. 255. If you are unsure of the MAC address of the device, you can find the current IP address and issue the following commands to get the MAC address and clear the DHCP binding before you create the pool. 1. It is only necessary with dhcp-relay, but you don't need a dhcp-relay in your case, as your router is the dhcp-server and your router should have a layer3-interface in DHCP Configuration (Cisco) Technology 3560, 3750, 3850, 3650, 4500, 6500, 6800, Router ISR, 7200, ASR . Setup a DDNS method to be called. Network I. Jul 27, 2019 · Cisco Router Configuration DHCP Server The DHCP server is used for automatic assignments of IP address to hosts. Task1: Configure R1 to act as a DHCP server and  Learn how to configure a Cisco IOS DHCP Server IP Exclusion range to that the router would use the entire network to provide DHCP addresses and start with  31 Dec 2013 Simple step by step commands to configure DHCP server on a Cisco router with example illustrated configurations. Router# configure terminal. 1. No other parameters are configured related to   Vendor: Cisco Software: 12. Router(dhcp-config)# lease {days [hours][minutes] | infinite} Step 7 (optional): Configure DHCP. CISCOSKILLS. enable Example: Router> enable. 0/24 network. add this: option 156 ascii "ftpservers=192. 9 Nov 2015 DHCP assigns IP addresses and other important network configuration information to clients dynamically. Jan 30, 2013 · How to Configure DHCP Server on a Cisco Router Introduction DHCP (Dynamic Host Configuration Protocol) is the protocol used by network devices (such as PCs, network printers, etc) to automatically obtain correct network parameters so they can access network and Internet resources such as IP Address, Default Gateway, Domain Name, DNS Servers and more. 0. 10. 168. 255. 2. 255. y. Auto-Configuration With a DHCP Server. 1. by Ali · September 21, 2014. 23 !! Excluded range of IPs that can’t be assigned! How to Configure DHCP on a Cisco Router This tutorial is about configuring a Cisco Router to serve as a DHCP server for client computers. Here are the steps I used to create my DHCP: Router(config)# interface ethernet0/0. Gibbons(config)#interface fastethernet 0/0. 0 3. Router (config-if)#exit. 100. 0 255. 0. Part 4: Verify DHCP and Connectivity. Aug 14, 2018 · Configure dhcp servers for networks 192. 168. Without a DHCP server in the network, you  24 Jan 2008 A Cisco router can be configured to act as DHCP client and obtain dynamically an interface address by using the command ip address dhcp in  18 Dec 2019 Step by Step to Configure Cisco Router as DHCP server in GNS3 · Step1. When the Dynamic Host Configuration Protocol (DHCP) server is available, the voice gateway sends a DHCP server request to provide the IP address for the Fast Ethernet 0/0 interface, and the TFTP server's IP address using the DHCP option 150. A dedicated DHCP server is scalable and relatively easy to manage, but can be costly to have one at every location in a network. 10. Router(config)# ip dhcp excluded-address 192. It's best to think of it as two routers inside one box, with a hidden ethernet cable linking them. 1 ! define a WINS server if you have one. 0/24 . 168. A router becomes a DHCP relay when it “relays” DHCP broadcasts to another interface. 168. 6 Jun 2020 Router 1 – Relay Agent Configuration Router#show ip dhcp binding w . To configure an interface as a DHCP client, the ip address dhcp interface mode command is Feb 22, 2020 · Find the DHCP section. With dynamic addressing, a device can have a Mar 18, 2021 · When such a snooping policy is configured on an access switch, external IPv6 Router Advertisement (RA) or Dynamic Host Configuration Protocol for IPv6 (DHCPv6) server packets are blocked, even though the uplink port facing the router or DHCP server/relay is configured as a trusted port. 10. 1. This might sound easy but there’s a catch to it…in this lesson I’ll show you how to configure this for a Cisco router and Windows 7 and Linux host. 255. When you have completed the configurations, verify the connectivity between the inside and outside addresses. 168. Turns off the DHCP service. 0. 8 exit. 0. You need to set up a DHCP scope on it for each VLAN, then you need to set up the DHCP relay (ip helper-address) on the layer-3 SVIs of your Cisco layer-3 switch. 6 10. 168. 0 255. In this article, we will show you how to configure a DHCP server on a Cisco router running the Cisco IOS operating system. w 255. The same configuration applies for other 800  1 Feb 2017 Configure DHCP on Cisco Router Using Packet Tracer. 0. 8. 1 Router( dhcp-config)# network 10. 0 255. 255. 22. Mar 18, 2021 · When such a snooping policy is configured on an access switch, external IPv6 Router Advertisement (RA) or Dynamic Host Configuration Protocol for IPv6 (DHCPv6) server packets are blocked, even though the uplink port facing the router or DHCP server/relay is configured as a trusted port. Configure the Router and Enable DHCP Router>en //Entering into Global Configuration Mode Router#conf t Enter configuration commands, one per line. option 150 ip 10. 255. 168. This the most common router supplied by the fibre internet providers in Australia when you ask for connectivity without PPPoE. 50 (excludes this range of addresses from the pool so they aren't given out) ! ip dhcp pool LAN import all network 192. For example, I might Use the command “Network”. Edmonton(config)#router eigrp 10. XXX. 1. 0/24 and 192. Sep 09, 2008 · The Cisco DHCP server feature is a full implementation that assigns and manages IP addresses from specified address pools to DHCP clients. If selected, the other options below will become available. في هذا الفيديو شرح طريقة تحويل جهاز الراوتر الى جهاز من نوعDHCP Serverوذلك من أجل توزيع عناوين بشكل تلقائي على Jun 19, 2013 · Router(dhcp-config)# dns-server 100. 10. We may now configure a simple DHCP pool. Access list 101 will be applied to the WAN interface. By default DHCP server will start to assign IP addresses from the first IP address of the assigned network ID and it will be 10. 0 !! This Interface is the G/W of our Network! Service dhcp !! Enable DHCP Service! ip dhcp excluded-address 10. You will configure the dhcp-relay agent to listen on the vlan where your clients are. CISCOSKILLS. YYY where, XXX. The data sheet for that device claims "Multiple DHCP Servers support, DHCP relay. com Getting started Let's look at how to configure basic DHCP on an IOS-based router. Run a DHCP server - The MX/MS will use its internal DHCP server to provide addressing and other information to clients. 10. Before you do that you could set the lease time to a period of a few minutes and watch the PCs and DHCP server automatically renew the IP addresses. We will start by configuring sub-interfaces with 802. مثال :- لو فى شركتنا لا يوجد خادم DNS ونستخدم Routers او Switches من شركة Cisco ممكن نستخدم اى من Router او Switch كــ DNS . This can be done by adding the following parameters to the command On R1, issue the following command to configure LANPOOL to use the IP address configured on the FastEthernet 0/1 interface as the default gateway for DHCP clients from this pool: R1 (dhcp-config)#default-router 192. 1 255. 0. The only issue with overlapping IP pools, it may take longer for a host to obtain an "available" IP because the DHCP servers wouldn't really know If you want to configure a DHCP reservation on a switch or router, gather the MAC address of the device. Step 1) Exclude the IP address for the Network 10. 0. 10. The mask is generally also included in the subnet number. r1(config)#ip dhcp pool satish. 0 255. 10. certbros. This allows routers to obtain interface IP address information via DHCP. After connecting all device according to above image. Let's configure Router 2 as DHCP Server and set the clients to get their IP address from  1 May 2013 By default, the Cisco IOS DHCP feature is enabled on a Cisco router. 10 Step to configure Cisco Call Manager Express Cisco Call Manager Express SwitchA V o i c e y L i n e 2 L i n e o c o n n e c t e P B X w i t h R V ic e G a t w a PSTN Network Voice Gateway Router Internet Desktop with Cisco IP Communicator Analog Line Configuring a Router-Based DHCP Server RT # co nf igu ret m al RTR(config)# ip dhcp excluded Router(config-if)#ip address dhcp Router(config-if)#no shut Router(config-if)#exit . 1. 16. 12. 0 Jan 26, 2020 · Step 4:Configure DHCP POOL for Each Network on Router R1. Configure the HTTP and HTTPS on cisco router. Apr 24, 2019 · IP DHCP Pool. Router(dhcp-config)#default-router 172. You will use 192. 116. 1. STEP. This is important because the router will be there in the network. 168. 0 desc link to LAN switch no shut exit ! ip dhcp excluded-address 192. YYY is the subnet mask for the network. In fact, it requires only one command. 1 Router (dhcp-config)#dns-server 8. 0 255. r1(dhcp-config)#network 1. 2. Gibbons(config-if)#ip address 192. Use 10. 168. – Confirm your router can ping something by name properly. 255. The router you are using for Inter-VLAN routing must be compatible and support Inter-Switch Link (ISL) which is a Cisco Systems proprietary protocol, and IEEE 802. Figure 1 Dynamic DNS. And it is as simple as entering few key parameters: Network Address — the The DHCP server assigns IP addresses from specified address pools on a router or router to DHCP clients and manages them. Sep 21, 2014 · The router will also add to this Unicast Packet a field called giaddr (Gateway IP address) in the DHCP Packet, this field will contains in our case the IP address 192. 0 255. This will usually be in the "Network Settings" section (or your router page's equivalent). 0 255. show ip dhcp pool [name]show ip dhcppool [name] Example: Router# show ip dhcp pool orbitz May 23, 2015 · Now in this lab i will configure Router “r1” as a DHCP SERVER and Router “r2” as a DHCP Client. The router interface has been configured with an IP address of 192. 1 DHCP POOL creation for network 5. 18. copy run start. 30. Router(config-if)#ip address 172. End with CNTL/Z. 1 R1(dhcp-config)#ip dhcp excluded-address 1. 116. Ask Question Asked 10 months ago. 255. default-router You have some problems. Use 10. 1. Console into the router and enter global configuration mode. You will also configure both static and dynamic NAT configurations, including NAT overload. 255. 0 255. 0 default-router 10. 1. 0 Jul 31, 2011 · Cisco DHCP configuration Configure a DHCP Pool on Cisco. z. 30 Configure line vty, interfaces, DHCP Pool. cx Configuring the Remote Router to Import DHCP Options Perform this task to configure the Router>enable Router#configure terminal Enter configuration commands, one per line. Define the pool, The name of the pool I have given is pool-01-10. 99 10. Then you need to know how to configure a cisco router as a DHCP Client. I have Instant AP 215 connected in the network does not seem to accept my config. 0 255. 255. 1. Step 2: Initialize and reload the routers and switches. com/ Course-InterestHOW TO PASS THE CCNA Get a great book  22 Jun 2015 Dhcp means Dynamic Host Configuration Protocol, which can be used assign ip addresses dynamically to pc's. The CCNA (Cisco Certified Network Associate) exams require you to understand DHCP and be able to configure and verify it on Cisco routers. 255. 1. T opology for h ow to configure DHCP on a Cisco router MY FULL CCNA COURSE📹 Register your interest - https://www. 16. Router(config)#ip dhcp pool <name> Options <network> network addresses that the DHCP pool may assign, this supports slash notation. 10. 0 or network 192. The next step is to create DHCP pool where we will define the IP address range which R1 will assign to DHCP clients. · Exclude IP addresses  16 Oct 2020 To configure a device as a DHCP client, change its IP configuration option to DHCP. Syntax. Security [+] In security, we perform network mapping using nmap tool. 1. 255. Below we specify a beginning address and an end address to exclude a range of IPs. How to Configuring a Cisco 2901 Router? Here we’ve put together the configuration process for the new CISCO 2901 router. 255. Router (config)# interface ethernet0/0. 255. May 18, 2017 · On Cisco devices, the DHCP Relay configuration is extremely simple. I am providing 10. If you want to exclude certain addresses, you must explicitly configure them (also in global configuration mode): router(config)#ip dhcp excluded-address low-address [high-address] Now, configure a DHCP pool name, which also allows you to enter DHCP configuration mode. The IP address of the default router should be on the same subnet as the client. Jun 19, 2013 · Router(dhcp-config)# dns-server 100. Just go on DHCP router and configure the below interface Fa0/0 ip address 10. " That means that it should do what you want. net Router(dhcp-config)default-router [IP address of gateway router] 6. 255. 168. To configure a router's interface as a DHCP relay agent, use the following command in interface configuration mode. 10. 1. Dynamic Host Configuration Protocol helps us to address dynamically   . The DHCP server leases the appropriate TCP/IP configuration to a  How to configure DHCP RELAY AGENT on CISCO Routers. [+] We verify the accounts by accessing through telnet and SSH. Adding DHCP option 156 and option 4 to Cisco Router. The first command, ip dhcp pool BRANCH2, is just creating the pool and giving it a name. 16. 20. XXX YYY. This example shows a Cisco router configuration as a basic DHCP server in the 192. 0 255. For enabling DHCP service in your cisco router, first go in to the interface in which you need to provide DHCP Service and provide an IP address for the same if it doesnt have. 1 255. Everything can be broken down into the following three steps: Create the IPV6 DHCP Pool Configure \ Apply the pool to an interface See full list on blog. S1(dhcp-config)# network 192. 2. في هذا الفيديو شرح طريقة تحويل جهاز الراوتر الى جهاز من نوعDHCP Serverوذلك من أجل توزيع عناوين بشكل تلقائي على Packet Tracer Router Configuration Basics . Go to the interface configuration: Router(config-if)#ip address dhcp. 0 conf t int fa0/0 ip add 192. 1 dns-server 8. Router(dhcp-config)network [network (subnet) ID] [/mask] 5. Automatic ip address  18 Jun 2017 Guide on assigning a Cisco DHCP IP reservation to a client device on the network. 1 Router( dhcp-config)# dns-server 10. ever. 1. - In a lot of smaller offices, branch offices,…or for a backup internet connections,…a circuit to an ISP that utilizes DHCP is required. 255. 0. 168. 0. Configure static route to reach networks 192. 168. 10. Setup the external DHCP interface to call the DDNS update method. to/3f16QA5 📹 Jan 15, 2020 · After you configure DHCP on Cisco Routers, the IP Address, Subnet Mask, DNS Address, Default Gateway, and Domain Name automatically distribute to each device on the network. 0 255. 1. Basically it’s a mechanism which assigns IP addresses to computers dynamically. 1. After a DHCP client has booted, the client begins sending packets to its default router. 0 255. 168. 255. 168. ip dhcp pool "pool-name" # creating a dhcp pool named "pool-name" 2. Feb 15, 2016 · DHCP stands for Dynamic Host Configuration Protocol. 168. The DHCP discovery follow four steps: Aug 15, 2019 · A DHCP server is configured with a pool of available IP addresses and assigns one of them to the DHCP client. R1# configure terminal Enter configuration commands, one per line. Nov 17, 2020 · router#configure terminal. 2. 0 255. 0. 3. 0 R1(dhcp-config)# default-router 10. ): How to Set Interface IP Addresses on Cisco Routers? How to Configure Static Routing on  4 Jun 2016 How to Configure DHCP on Cisco Router. In this configuration lab, we will configure a DHCP server using a CISCO router and see how it assigns addresses to clients as we discussed  16 Oct 2013 How to configure DHCP in cisco router using packet tracer simulator,DNS,Default Router,DHCP pool,Netbios server,Lease excluded address. 10. 255. 2 HQ(dhcp-config)#lease 8 HQ(dhcp-config)#dns-server 4. 1 IP address as the default gateway and DNS server. Use. 1. Router(config)int range FastEthernet0-7 Router(config-if-range Dec 05, 2013 · Configuring a cisco 2901 router 1. 255. 0. On Router1, execute the following commands to configure an IP address. 255. 2. certbros. DHCP (Dynamic Host Configuration Protocol) is a service that allows you to allocate the TCP/IP  6 Apr 2010 Returns to global configuration mode. 168. 1q frame format for routing on the Fast Ethernet interfaces. 0. While we don’t recommend using dynamic addressing for routers in an internal network, this can be extremely useful for routers that connect to the Internet through an ISP. XXX is the network address to be used by the DHCP pool YYY. 0 Router (dhcp-config)#default-router 192. 1. A Cisco router can be configured as a DHCP server to assign IP addresses dynamically to internal hosts. 10. 2. 1. Router(dhcp-config)# network 172. Configuring DHCP on a Cisco router Dynamic Host Configuration Protocol ( DHCP ) is used when we turn on our laptops, phones, and client desktop PCs. 168. 2 R1(dhcp-config)# domain-name TESTLAB. DHCP POOL Creation and Configuration on r1: Router>enable. 255. xx. (Last activity). Basic configuration. 100(Configure 2 IP) NOTE: Please also reference the “option” function available under the {edit system services dhcp] stanza. · Login to the device using SSH / TELNET and go to enable mode. com’ is an effective test. network 192. 255. ip dhcp pool PC_POOL network 10. 0 default-router 192. Creating multiple subnets can be useful for a variety of reasons. 0. com See full list on firewall. 168. 1/1 TrainingCisco DHCP Naming covention for devices password Router--- for specific user username : cisco password : [router+number]--- for line console 0 password : [console0+router name] # How to Set up a DHCP Service on Cisco ROuter 1. 168. 1 The default router is also known as the default gateway. 0. 1 since the router receives the DHCP Discover message on the Fa0/0, and the source IP address of this Unicast packet will be also 192. Setup and confirm DNS resolution works. 1. 168. Router (config-if)#ip address 192. 0. YYY. 168. If you are using a Cisco Router as a DHCP server, you can still set it to offer option 156. R1#config t. Jan 08, 2018 · Lab 118: Configuring DHCP on Cisco Router 1. YYY. For this example, we'll start off with the default configuration on a Cisco 2611 router running IOS 12. 0 255. To check the status of the DHCP Server, use the command show ip dhcp bind from the router’s command line interface. 1 192. The Cisco router is configured from the Cisco IOS command line. 115. XXX. 1 Router(dhcp-config)# option 66 ascii http://someserver/somesite Router(dhcp-config)# dns-server 8. Issuing this command causes the router to transmit DHCP Discover messages on the specific interface. 1 192. 1 dns- server what. 10. You want to configure DHCP on your Cisco router to provide automatic IP address assignment to a single subnet. DHCP frees you from having to manually assign an IP address to each client. An interface on a router that connects to the Internet Service Provider (ISP) is often configured as a DHCP client. 2. This article will show you how to correctly configure and troubleshoot NAT Overload or PAT on a Cisco router. 0 /24 Jun 23, 2020 · These four things are firstly required to decide. 168. Router(dhcp-config)# network 172. 255. Dec 01, 2012 · To set the default router for DHCP (This is usually the router’s interface address, PCs would call this their default gateway. Router(dhcp-config)# default-router 172. This article will show you how to successfully configure the DHCP service & its parameters on a Cisco router. Network I. y. Active 24 days ago. 1. itis ! ip dhcp pool pool2 network 10. z. 1. Configuring DHCP. 255. This command, however, does more than just forwarding DHCP broadcasts, here’s a list: May 19, 2020 · These days, most routers comes with elegant and intuitive UI to guide user to setup DHCP services on their home router. 20. By default dhcp will be running on router so skip 'service dhcp' command if you are configuring dhcp in packet tracer,just create a network pool for the network it will work. it uses a process called  5 May 2005 Configure an IP address on the router's Ethernet port, and bring up the interface. 255. NET) BRANCH-1 (dhcp-config)#domain-name BRANCH1. 8 Router(dhcp-config)# lease 8 Router(dhcp-config)# exit Router(config)# interface GigabitEthernet0/0 Router(config-if)# description VoIP A typical customer configuration would be use the Cisco Router to provide DHCP services in the Data VLAN and use the 3300 ICP DHCP services in the Voice VLAN. They take an 169-address and do not assosiate with AIRwave. 16. XXX. Enters interface configuration mode. Really simple, huh Hope that helps some of you The final line takes the router out of access list configuration mode. By default routers do not 2 days ago · Sometimes there is a need to have DHCP configured for end devices and you need a client to have an IP address reservation so you can configure things like applicable access lists or NAT entries for instance. Theory Dynamic Host Configuration Protocol (DHCP) is a protocol for assigning dynamic IP addresses to devices on a network. Task1: Configure R1 to act as a DHCP server and provide all network information to hosts in the LAN dynamically. For this lab you'll need three computers, all booted into Linux on the USB flash drives, a Cisco SB300 switch and its serial cables, and a couple of ethernet cables. Step 0: Setup. 255. 21 Jan 2013 In this post we will show you how to configure a Cisco 851 or 871 router to work as DHCP server. 1 Configure Cisco router as a DHCP client Cisco routers can be configure as both DHCP servers and DHCP clients. ip dhcp pool "pool-name" # creating a dhcp pool named "pool-name" 2. 168. DHCP Jan 15, 2020 · After you configure DHCP on Cisco Routers, the IP Address, Subnet Mask, DNS Address, Default Gateway, and Domain Name automatically distribute to each device on the network. 0 Router (dhcp-config)#default-router 192. 0. 5 Jun 27, 2013 · By default, the Cisco IOS DHCP server and relay agent features are enabled but are not configured. 1. xx ip range here. 1- تشغيل DNS service على Router :- R1#Configure Terminal R1(Config)#IP DNS server 2-… في هذا الفيديو شرح طريقة تحويل جهاز الراوتر الى جهاز من نوعDHCP Serverوذلك من أجل توزيع عناوين بشكل تلقائي على Remember from DHCP server video; it is done on two step process. Connect to your Cisco router via telnet/SSH and go to the configuration mode. 4. Many of the parameters and options defined in the RFC are present and available in IOS routers. 255 # defining network address and netmask 3. 168. Define a subnet that will be used to assign IP addresses to hosts with the network SUBNET SUBNET_MASK command. 0 Router( dhcp-config)# exit. 1. router-switch. z. DHCP operates on a client-server model, where a DHCP server sends configuration information to DHCP clients. These commands are used Cisco router configuration for pppoe dhcp and nat. 165. 4. com/Course-InterestHOW TO PASS THE CCNA📚 Get a great book - https://amzn. Gibbons(config-if)#description LAN Interface. Within the 'DHCP Pool'. 255. Next, create a DHCP pool named DhcpPool1. Sets the local description of the interface. Viewed 463 times 0. Ex network 192. End with CNTL/Z. Enables the DHCP service and relay features on a Cisco IOS router. With that said, let's get onto the configuration of a basic DHCP server. 8. Router (config-if)#no shut. DHCP Server functionality can   All Cisco series models have the ability to work as DHCP servers, thus assigning addresses to the internal LAN hosts. 1 172. 5. 1/24 which will be the default gateway or default router for the end devices. default-router 192. Usually DHCP is a service running on a server machine in the network in order to assign dynamic IP addresses to hosts. (R1 and R2 are directly connected via Ethernet) Server Configuration (R1)!– enable dhcp server (default) service dhcp! — defining DHCP pool with all network information ip dhcp pool OFFICE network 192. 255. 12. 22 May 2020 When you're looking to configure DHCP on Cisco routers, Layer 3 and Layer 2 switches, follow these steps: Exclude IP addresses from being  Move to configuration mode by typing this (you exclude address that you don't want the DHCP to assign to any device, e. 1 192. Copy the following basic configuration and paste it to the running-configuration on the router. 0 255. w 255. To do this, click the device. Task1: Configure R1 to act as a DHCP server and provide all network information to hosts in the LAN dynamically. If you want to specify DHCP 150 TFTP option to let IP phones download the configuration file from call manager, specify this additional command (dhcp-config)#option 150 ip 192. Enter configuration commands, one per line. xx. 255. enable secret class May 23, 2015 · Configure the DHCP pool to assign addresses to internal hosts ip dhcp pool vlan1pool network 192. 10. 255. Configuring NAT Overload on a Cisco Router. 0; R2(dhcp-config)# default-router 192. Returns to global configuration mode. 2 10. 0. X , 15. Certain IP addresses like the IP address of the default gateway router and the DHCP server Configure DHCP reservation. Mar 20, 2018 · Part 1: Configure a Router as a DHCP Server. You may also like: How to configure multiple dhcp for different vlans in Cisco Packet Tracer . 168. Cisco router uses the Cisco IOS  The Dynamic Host Configuration Protocol (DHCP) is a standardized network protocol used on Internet Protocol (IP) networks for dynamically distributing network  21 Sep 2020 Is it better to use Windows based DHCP for this scenario? Although, Business doesnt have Money to setup a new Windows server (DHCP). default-router On Cisco Router, you can go to specific interface that you want to configure the DHCP Relay Agent, issue this command ip helper-address other subnet address Make sure that your DHCP server has one scope configured to release the IP in the same subnet with the interface on the router. Enter your password if prompted. Here, I would like to give you some information about how to configure a Cisco router on Packet Tracer basically. 1. Please give us your router-configuration, otherwise it would be difficult to find the reason for your dhcp-issues. 168. 255. w 255. 2012년 7월 19일 여기서는 시스코 라우터에서 DHCP 서버를 구현하는 방법에 대해서 알아 Configuring a DHCP Database Agent or Disabling DHCP Conflict  9 Mar 2016 MY FULL CCNA COURSE Register your interest - https://www. Enter configuration commands, one per line. This is important because the router will be there in the network. 168. ip. 1. A Cisco router can be configured to act as DHCP client and obtain dynamically an interface address by using the command ip address dhcp in interface configuration mode. 10. 36 ! Do not assign addresses 1 to 30 ip dhcp excluded-address 192. I am going to create it with the name DHCP-POOL DHCP is a critical service and your Cisco IOS router can provide full support to be a DHCP server. 224. Once the preliminary design is completed, the steps required to configure DHCP on a Cisco router are fairly simple. 255. 255. 0, hostname R2 R2# Mar 19, 2015 · To support and use DHCP service across multiple subnets, the router(s) that connect each subnet must support DHCP/BOOTP relay agent capabilities. DHCP Server functionality can be enabled on switch where Mar 18, 2021 · When such a snooping policy is configured on an access switch, external IPv6 Router Advertisement (RA) or Dynamic Host Configuration Protocol for IPv6 (DHCPv6) server packets are blocked, even though the uplink port facing the router or DHCP server/relay is configured as a trusted port. 1/1 TrainingCisco DHCP Naming covention for devices password Router--- for specific user username : cisco password : [router+number]--- for line console 0 password : [console0+router name] # How to Set up a DHCP Service on Cisco ROuter 1. z Cisco has a good resource on DHCP Configuration. 1; R2(dhcp-config)# dns-server 192. 0. 8 Router (dhcp-config)#exit. 10. default-router Do any one have an example of dhcp pool config for a Cisco router. 26, mask 255. Step 2 Create the DHCP pool, including the necessary parameters such as default router and name server. 255. This lab is intended to be a simple tutorial for beginners. 2. To change the default DHCP lease time for a pool of IP addresses, use the lease configuration command: R1#configure terminal R1 (config)#ip dhcp pool 192. 0. In opened Windows, click the IP  Configure a DHCP Server on a Cisco router. Network I. 255. 2 HQ(dhcp-config)# Let’s examine these commands one at a time. 0. 0 Apr 10, 2014 · It’s Simple. 10. 168. I will demonstrate you how to configure DHCP pool, DHCP excluded address, I would like  9 Sep 2008 The Cisco DHCP server feature is a full implementation that assigns and manages IP addresses from specified address pools to DHCP clients. YYY. 255. Configure DNS :- DNS هو بروتوكول يستخدم لعمل ترجمة من IP الى Name و العكس . Oct 23, 2006 · By contrast, relay agents receive DHCP messages and then generate a new DHCP message to send out on another interface. The other router forwards DHCP requests to the server. y . The first thing to do is exclude any important addresses like servers, access points and the router itself. 16. 255. printers, static IP addresses, etc. This way, the ISP can provide the IP information to the client device. 168. 1. This command should be used after the fourth command. 8. 255. 0/24 and 192. One router is the DHCP server. If you experimented As shown in the picture below, Router Interface gig0/0 is configured as 192. For switch networks: Switch > Configure > Layer 3 routing, and select the desired interface. 1. 0/27 for the subnet address. 255. 1 To set the domain name of this network (This example is using BRANCH1. 1. 0 R1(dhcp-config)#default-router 1. 1 S1(dhcp-config)# dns-server 192. 255. Step 1) Exclude IP address range. The DHCP (Dynamic Host Configuration Protocol) protocol is a feature to provide machines that require a full IP, IPv4 address, subnet mask, default gateway, dns server This article is about How to configure DHCP on a Cisco router. 10. Router(config)# ip dhcp pool IP-Phones Router(dhcp-config)# network 172. 18. 168. 168. Mar 19, 2013 · Let’s configure our Cisco router R1 to act as a client to work with a Dynamic DNS (DDNS) service provider DynDNS (www. This enables the privileged EXEC mode. Access to the Internet “. However, Cisco 870 series routers were End-Of-Life at This short and sweet How To explains how to configure the DHCP Client in IOS. 100. [+] Check how many ports are open after Mar 07, 2012 · I think that NPS can only use a Windows 2008 DHCP server. 1. Third, you do not even have a default router for the DHCP pool 425. g. · Create a DHCP IP address pool for the IP addresses you want  You will learn how to configure DHCP on Cisco Router. 7 R1(dhcp-config)# end R1# Objective 2. 255. They had their branch offices running off local dhcp from their routers, we ended up placing a DHCP helper record on the switches\routers to the 2008 DHCP servers which were located at the datacenter. Router(config)# ip dhcp excluded-address 192. 40. 8. 255. But the point to note here is that a device connected to the network must be configured to obtain the TCP/IP settings automatic IP address. For more information see – Support multiple subnets with one DHCP server by configure DHCP relay agents. 0  Part 2: Configure a DHCPv4 Server and a DHCP Relay Agent Note: The routers used with CCNA hands-on labs are Cisco 1941 Integrated Services Routers  Configure the R1, R2, and ISP routers according to the following guidelines: Cisco IOS software supports a DHCP server configuration called Easy IP. 0. Define the DHCP address pool, Router(config)#ip dhcp pool POOLNAME Router(dhcp-config)#network XXX. 2. 255. create the DHCP pool that defines the network of IP addresses that will be given out to the clients. 0/24 network. If your router connects to your internet service provider (ISP), your ISP will issue the router an IP address to one of the interfaces; this interface needs to be set as a DHCP client. Enters global configuration mode. Step1. You will configure the dhcp-relay agent to point to your dhcp server. 20. 168. Router(config)# ip dhcp exclude-address 172. 1. 168. How to configure a DHCP pool. 0. 168. 1. [+] Access cisco router through browser. The first line sets up the access list and places the router in access list configuration mode. a. 2. y. DHCP is a critical service and your Cisco IOS router can provide full support to be a DHCP server. no service dhpc. 0. 2. Sep 05, 2016 · Configure DHCP on a Cisco router or switch If you want to configure Dynamic Host Configuration Protocol (DHCP) on PC clients, you currently have multiple options to choose for your DHCP server. 2. 1(2)T. 22. 0 255. 0. …Review this diagram. Configuring a DHCP Pool Configure a DHCP pool name, which also allows you to enter DHCP configuration mode: Router(config)#ip dhcp pool [name] (I like to use names that describe the subnet serviced by the pool. Part 3: Configure a Router as a DHCP Client. This is not a part of DHCP Configuration, but they are essentials for router configuration. 168. 1. The purpose of this lab is to learn to configure a Cisco Switch/Router to run a DHCP server, serving addresses to hosts on a VLAN. 10. 168. – Setup DNS resolution. Step 3 – Configure the network addresses that will not be assigned to DHCP clients: Perform this task to verify your DHCP address pool configuration. 0 Router (config-if)#no shut Router (config-if)#exit Router (config)#ip dhcp pool gyancs Router (dhcp-config)#network 192. Fourth, you have conflicting DHCP pools. Here the port is GigabitEthernet0/0/0. Jan 08, 2018 · Router( config)# ip dhcp pool DhcpPool1 Router( dhcp-config)# default-router 10. 0 Specifies the network for the DHCP Pool VLAN_10 as the 172. 8. Router ( config)# int fa0/ 0 Router ( 2. 255. dyndns. provides routers with dummy-proof GUIs (Graphical User Interfaces). 10. End with Jul 19, 2020 · Also, most network routers support the DHCP server mode. 3. This is done using a single command. 0. Configure a longer DHCP lease time than the default of one day: Router(dhcp-config)#lease 8 7. Router(config)#ip dhcp excluded-address 172. All Cisco 800 series models have the ability to work as DHCP servers, thus assigning… Mar 07, 2012 · I think that NPS can only use a Windows 2008 DHCP server. 255. X Platform: Catalyst 2960, 3560, 3750, 3850, 3650, 4500, 6500, 6800, Router ISR, 7200, ASR. 168. 0. Sep 17, 2011 · You will need a router to connect your VLANS together. 20. end. 0 Nov 17, 2020 · Router(dhcp-config)#exit. 1. 168. 168. It doesn’t need any special requirements and this is done by using a single command : Router (config-if)#ip address dhcp. We normally use a Microsoft DHCP server, where we create a scope . This IP will be the gateway ip address. The first step is to define a DDNS update method: R1>enable R1#configure terminal Enter configuration commands, one Mar 20, 2018 · Configure the DHCP pool to include the network address, the default gateway, and the IP address of the DNS server. 8. A simple ‘ping google. Router(config)#service dhcp. Body/Solutions The following output was taken from a "show run" output of a Cisco router that is configured for DHCP services. Router(config)# ip dhcp pool my-dhcp-server Dec 29, 2019 · Router>enable Router#configure terminal Router (config)#ip dhcp pool aris Router (dhcp-config)#network 192. The text of the name should be selected so that if you, the network admin, come back three months later and examine the config on this router, it will remind you what you were trying to accomplish when you typed it. Next, you cannot have a default router in a different network as you do for some of the DHCP pools. 1. Step 3: Configure basic settings for each router. Oct 01, 2019 · Configuring a Router as a DHCP Server. So, here, we will learn how to set our laptop to connect a router, how to change a router’s If I remember correctly, there should be a DHCP ping check for a duplicate IP before it's used, if so, even if two Cisco routers are working from the same address pool, all should function correctly. DHCP Relay configuration on Cisco SG300 Managed Switch Jan 09, 2018 · Configure a DHCP Server on Cisco Router January 9, 2018 This Tutorial shows you how to Configure a DHCP Server on Cisco Router as shown in above Image ‘CCNA-RS-IMG-2. 116. Dynamic Host Configuration Protocol (DHCP) is a client/server protocol that automatically provides an Internet Protocol (IP) host with its IP address and other related configuration information such as the subnet mask and default gateway. 8. 0 and POOL CCNP. Step2: Configure the Router to become a DHCP Server: This step involves two sub steps that are required to be carried out. The relay agent sets the gateway address (giaddr field of the DHCP packet) and, if configured, adds the relay agent information option in the packet and forwards it to the DHCP server. If you can't find DHCP there, look for it in the "Advanced" settings, "Setup" settings, or "Local Network" settings. 168. Step 2) Create a scope and give IP address for Default-gatway. service password-encryption . One of the more common ways to accomplish this is by using a Windows or Linux server. The dhcp option along with byte-stream allows further option flexibility. no ip domain-lookup . A DHCP server have a pool of IPs and assigns one of them to the every DHCP client. router(config)#host Gibbons. 10 Dec 31, 2013 · Router (config)#int fa0/0. 1 lease 7 ! end ! copy run start Mar 06, 2013 · Cisco DHCP Option150 Configuration: ip dhcp pool vlan 10. 1 255. This will force the PCs to acquire new IP addresses. Cisco routers can be configure as both DHCP servers and DHCP clients. 1. HQ(dhcp-config)#default-router 209. i am shure, you don't need an "ip-helper" address in this case. For example, you can VLANS. …In interface configuration mode, the command IP address DHCP…is all that is required. 202. 255. R1(config)#ip dhcp pool CCNA R1(dhcp-config)#network 1. 1 255. 07-11-2006, 08:07 PM. May 20, 2018 · The objective of this Lab is to configure multiple dhcp servers for vlans on the router to service hosts in different vlans. 12. Routers in packet tracer won't accept this command. T. Create a new DHCP pool with the ip dhcp pool NAME command. · Go into the config mode. 168. Router(config)#no service dhcp. The “Network” command is primarily used to provide the DHCP address pool with the subnet number of the IP Address which has been defined. PC>ipconfig /release. 1q encapsulation on the router and the assignment of IP addresses from different subnets to the sub-interfaces. Aug 29, 2017 · You can configure DHCP on a Cisco router or layer 3 Switch using the following commands. Specifies the range of addresses not to be leased out to clients. The Cisco IOS DHCP server is a full DHCP server implementation that assigns and manages IP addresses from specified address pools within the router to DHCP  15 Jan 2018 The Cisco IOS DHCP server is a full DHCP server implementation that assigns and manages IP addresses from specified address pools within  31 Aug 2018 Configure Cisco router as DHCP server · Exclude IP addresses from being assigned by DHCP by using the ip dhcp excluded-address FIRST_IP  Steps to configure DHCP server through CLI. Syntax and explanation included. network x. Use these show commands, they need not be entered in any specific order. 10. RFCs 2131 and 2132 define DHCP as an Internet Engineering Task Force (IETF) standard based on Bootstrap Protocol (BOOTP), a protocol with which DHCP shares many implementation details. They had their branch offices running off local dhcp from their routers, we ended up placing a DHCP helper record on the switches\routers to the 2008 DHCP servers which were located at the datacenter. However, Cisco 870 series routers were End-Of-Life at View Offline. In this setup I will use a Cisco vIOS router image with IOS version 15. 1 172. The configuration is pretty straightforward as you would see in a moment. Cisco started to include DHCP client functionality in IOS Version 12. 1 192. 9 S1(dhcp-config)# lease 3 Configure DHCPv4 for Multiple VLANs: S1(config)# interface f0/6 S1(config-if)# switchport access vlan 2 S1(config)# ip dhcp excluded-address 192. An interface on a router that connects to the Internet Service Provider (ISP) is often configured as a DHCP client. 8. 0 255. 4. 6. network x. End with CNTL/Z. Router(dhcp-config)# exit !The following addresses will not be given out to clients. 1. In this … The router was preconfigured in accordance with the guide “Basic configuration of the Cisco Router. 0. x . 5 Router (config)#exit Router#. LOCAL R1(dhcp-config)# dns-server 10. 255. DHCP Configuration Commands: Router(config)# ip dhcp pool VLAN_10 Creates a DHCP Pool named VLAN_10. 0 255. 255. 0. 2 days ago · IPV6 DHCP Server configuration on a Cisco device is very similar to a normal, IPV4 configuration, but there is a big difference that you will want to make sure to not miss. 10. Within this Pool we will specify the items mentioned above. 1 255. 10. A Cisco router can be configured as a DHCP server. 1. In Router we configure these four things. 44 You need Service DHCP command to enable DHCP server and relay agent on your switch, by default this feature is enabled. Router(config)# ip dhcp pool Home. 255. T. 168. The DHCP relay need to apply on the interface or VLAN that connect the clients. First we need to create a pool of IP addresses that will be used to assign to clients:! Configure the DHCP pool to assign addresses to internal hosts ip dhcp pool lan-pool network 192. We can give these IP addresses manually one by one or dynamically and automatically with IP address allocation mechanism, DHCP (Dynamic Host Configuration Protocol. Some service providers might ask you to use a client-id and/or a hostname of their own choice. …On router one it's config t interface gig zero one. ) BRANCH-1 (dhcp-config)#default-router 192. 168. Exclude IP addresses from being assigned by DHCP by using the ip dhcp excluded-address FIRST_IP LAST_IP. Obviously this is a very easy thing to do on a Windows Server, but it is a bit different to do a Cisco DHCP IP reservation on a Cisco router. 0/24, even though they are not directly connected to the Core. 0. If by some means the DHCP feature is disabled on your router or switch you can re-enable it by running the following command in global configuration mode: في هذا الفيديو شرح طريقة تحويل جهاز الراوتر الى جهاز من نوعDHCP Serverوذلك من أجل توزيع عناوين بشكل تلقائي على This post is about configuring a CISCO router to act as a DHCP server in your network. Setelah konfigurasi yang diatas sudah dilakukan pada Router Cisco. In other words, enter the configuration for the interface in the same broadcast domain as clients. 255 # defining network address and netmask 3. PC>ipconfig /renew . Step 1: Get your hosts on VLAN 1. network x. 168. 1. Once there, the Client addressing setting will determine how DHCP messages are handled on that VLAN/subnet. 1 255. 0 255. Enables the EIGRP routing process for autonomous system 10. Oct 25, 2011 · For all of you experienced Cisco people, this may seem easy to you, however, for all the noobs out there, this is how you turn off or disable DHCP on a Cisco router: config t. R1(config)# ip dhcp pool LAB_POOL2 R1(dhcp-config)# network 10. 10. Making Cisco Router as DHCP Server; Connect Ethernet cable from F 0/0 of router to Switch; Connect Ethernet cables from switch to Hosts & select option Obtain IP address Automatically in host; Enter following commands in Router to make it DHCP Server; Router> enable. com). First, you do not need to exclude the router address from the DHCP pool, it already does that. In order configure a Cisco Catalyst switch to act as a DHCP relay agent, issue the ip helper-address command in interface configuration mode and specify the IP address of the DHCP server on the Jun 25, 2013 · From the command prompt in the client computers, verify the ip configuration by sendingipconfig (make sure that the client is configured to receive ip address from dhcp server). 1. 8. 168. 255. 168. 2. The first one is to create a DHCP address pool. 0. 255. How to Configure a Cisco Router DHCP and DNS Setup. 168. 255. 11 Jul 2008 This post is about configuring a CISCO router to act as a DHCP server in your network. R1 (config)#ip dhco. 8 4. You can configure a Cisco router as a DHCP server by using these commands: R1(config)#ip dhcp excluded-address 192. 255. 168. To configure these settings, click on “DHCP” in the side bar, and then click on “DHCP Setup” Add or Edit an IPv4 Sub Network. In the interest of sharing what I've learned to help others in my situation, here is how I connected a Cisco 881W router to a DHCP-fed Internet connection. Commands required to run in router to configure router as DHCP server. 10. 168. In this example we will assume a router is used. 14 Nov 2019 For this first case of our DHCP Cisco packet tracer example, the One Broadcast Domain topology that we will use, is like below. First, just a little about the 881W. 0. 9. Router(config)#hostname r1. 1 dns-server 100. configure dhcp on cisco router