RE: RIP and Loopbacks in OSPF.......

From: Wade Edwards (wade.edwards@xxxxxxxxxxxxxxxxxxx)
Date: Mon Feb 11 2002 - 15:41:37 GMT-3


   
RIP, even version 1, supports host routes. This is just one of those
strange things you run into when studying for the CCIE.

In the RFC it states that support of host routes is optional but Cisco
does support host routes.

L8r.

 -----Original Message-----
From: Steven Weber [mailto:itweber@earthlink.net]
Sent: Monday, February 11, 2002 11:55 AM
To: ccielab@groupstudy.com
Subject: RIP and Loopbacks in OSPF.......

I made an interesting observation, I wanted to know if other people are
experiencing the same thing, and the logic behind it. When
redistributing
between OPSF and RIP I noticed that the loopbacks in OSPF don't need to
be
summarized in order for RIP to see them. OSPF advertises a loopback as a
/32
by default and RIP has no problem with this. However, once I add the ip
ospf
network point-to-point command on the loopbacks thereby changing them
from a
/32 to their true mask, once again RIP cannot see them unless there is
some
sort of summarization or default route in place. I don't understand why
RIP
sees these routes as a /32, shouldn't they need the mask native to RIP
in
order to be seen in RIP ?

Does anyone have insight on this one?

Regards,

Steve



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