Auto-Summarization

brooza

Hi,

I've been reading up on summarization for EIGRP & RIP and need someone to help explain what the following terms mean;

Major network boundary
Classful boundary

I understand the term classful and know what a major network is, but I think the word "boundary" is throwing me off..... :

Thanks.

alan2308

A classful boundary is where one classful network ends and the next one begins.

Let's say that you have a router that has connections to 10.5.0.0/24 and 10.6.0.0/24 and you're using a classful routing protocol. Since these two networks are within the same classful boundaries, that router will advertise a single classful route to 10.0.0.0/8.

brooza

Here is some information I found on a forum regarding auto-summarization;


RIPv2 - Summarizes prefixes to classful boundary when passing discontiguous network boundary

EIGRP - Summarizes prefixes to classful boundary when passing major network boundary


So what is meant by "passing network boundary" or "passing major network boundary"


:


Thanks