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Free CCNP GNS3 Lab Configuring BGP with Default Routing





In this Free CCNP Lab you will create a multihomed ISP connectivity solution and contracted with two ISPs for Internet connectivity with fault tolerance. Because you are connecting to two different service providers, you must configure BGP, which runs between the boundary router and the two ISP routers

Note: This lab was created using GNS3 but can be completed with real hardware such as Cisco 2620 routers with Cisco IOS Release 12.4(24)T1 and the Advanced IP Services image c1841-advipservicesk9-mz.124-24.T1.bin. You can use other routers (such as a 2801 or 2811). 

Cisco IOS Software versions if they have comparable capabilities and features. Depending on the router or switch model and Cisco IOS Software version, the commands available and output produced might vary from what is shown in this lab. 

Learning Objectives:

  • Configure BGP routing.
  • Configure BGP neighbors.
  • Advertise BGP routes.
  • Use Distributions list to filter BGP routes.
  • Configure primary and secondary default routes .
  • Configure BGP to exchange routing information with two ISPs. 

Perform Basic Router Configuration:

  1. Configure the hostname on all routers and switched as shown in the network diagram.
  2. Configure no ip domain-lookup on all routers and switches.
  3. Configure the enable secret password as cisco on all routers and switches.
  4. Configure the console and vty password as sanfran on all routers and switches.
  5. Configure the exec-timeout command to the console and virtual terminal lines.
  6. Save the running configuration to the NVRAM. 

Finish Configuring Router Interfaces:

  1. Configure the IP address, and subnet on the Loopback interfaces of R1, R2 and R3 as shown in network diagram.
  2. Configure the IP address, and subnet on the serials interfaces of all routers as shown in network diagram.
  3. Configure the clock rate on the DCE serial interfaces to be 64K.
  4. Insure the state of the Ethernet and serial interfaces is up.
  5. Backup the configuration on all devices. 

Configure BGP:

  1. Enable BGP routing on R1, R2 and R3 as shown in the network drawing.
  2. On the R1 and R3 routers, configure BGP to peer with R2 boundary router
  3. Advertise R1,  and R3 loopback networks.
  4. Configure R2 router to peer with the R1 and R3 routers.
  5. Advertise R2 loopback networks.
  6. Run the following Tcl script on all routers to verify connectivity If these pings are not successful, troubleshoot

Note: The WAN subnets connecting (R2) to (R1 and R3) are not advertised in BGP, so the ISPs will not be able to ping each other’s serial interface address.

 tclsh
foreach address {
10.0.0.1
10.0.0.2
10.1.1.1
172.16.0.1
172.16.0.2
172.16.1.1
192.168.0.1
192.168.1.1
} {
ping $address }

To continue with this lab Download this lab now:

  BGP-Default-Route (81.3 KiB, 1,458 hits)


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