Summarizing with IGRP?

From: Joe Martin (jmartin@xxxxxxx)
Date: Sat Apr 22 2000 - 18:31:54 GMT-3


   
In a practice lab I'm doing, I was asked to create three loopbacks and
assign IP addresses to each. Using IGRP only on that router and neighboring
routers, I'm supposed to summarize those three interfaces into a single
entry to neighboring routers.

The only way I can think to do this is with a supernet/summary route to
Null0 matching the class that the rest of the IGRP network is using. In
this case, I was using a 24 bit mask throughout the IGRP network for a Class
B network. I assigned each of the loopback interfaces a subnet using 26
bits.

interface loopback 0
  ip address 150.100.24.1 255.255.255.192
!
interface loopback 1
  ip address 150.100.24.65 255.255.255.192
!
interface loopback 2
  ip address 150.100.24.129 255.255.255.192

I then created the "ip route 150.100.24.0 255.255.255.0 NULL0"

Knowing that Static routes are a NO NO, does anyone else know of a way to
accomplish this?

Thanks,

JOE



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