Lab 6.7.1 EIGRP Summarization

Objective: 

Discover Auto-Summarization by the EIGRP routing protocol.

Scenario: 

You have been called by the Goodwill Industries to setup a WAN for the distribution of recycled goods. You must setup EIGRP but you are to be careful of the Auto-summary feature.

Tasks:

From the "Router A" console

  1. Cable the lab as shown above and erase all routers.
  2. To configure the interfaces and turn on the EIGRP routing protocol issue the following commands:
  • router-a(config)#interface serial 0/0 
  • router-a(config-if)#ip address 172.16.1.1 255.255.255.0 
  • router-a(config-if)#no shutdown 
  • router-a(config-if)#router eigrp 44 
  • router-a(config-router)#network 172.16.1.0 
  • router-a(config-router)#^Z

From the "Router B" console

  1. Issue the following commands:
  • router-b(config)#interface fastethernet 0/0 
  • router-b(config-if)#ip address 10.1.2.1 255.255.255.0 
  • router-b(config-if)#no shutdown 
  • router-b(config-if)#interface serial 0/0 
  • router-b(config-if)#ip address 172.16.1.2 255.255.255.0 
  • router-b(config-if)#clockrate 56000 
  • router-b(config-if)#no shutdown 
  • router-b(config-if)#interface serial 0/1 
  • router-b(config-if)#ip address 10.1.1.1 255.255.255.0 
  • router-b(config-if)#bandwidth 256 
  • router-b(config-if)#router eigrp 44 
  • router-b(config-router)#network 10.1.2.0 
  • router-b(config-router)#network 172.16.1.0 
  • router-b(config-router)#network 10.1.1.0 
  • router-b(config-router)#^Z
  1. Follow the same procedure with different addresses on the other two routers

From the "Router A" console

  1. Enter show ip eigrp topology 10.0.0.0 and report your findings below:

From the "Router B" console

  1. Enter show ip route 10.0.0.0 and report your findings below:

  1. Enter show ip eigrp topology 10.0.0.0

What is null0 ?

  1. Turn off the auto-summary feature of EIGRP by issuing the following commands:
  • router-b(config)#router eigrp 44 
  • router-b(config-router)#no auto-summary 
  • router-b(config-router)#^Z
  1. Enter show ip eigrp topology and report your findings below:

From the "Router A" console

  1. Enter the commands show ip eigrp topology 10.0.0.0 and show ip route. Report your findings below: