RE: Split Horizon

From: MOLINA, MARTIN J *Internet* (PBI) (mm1343@xxxxxxx)
Date: Fri Jan 11 2002 - 01:54:14 GMT-3


   
Misread your question: On a multipoint Frame interface, spoke to spoke route
propagation will be achieved by disabling split horizon for IGRP,EIGRP,and
RIP1+2. OSPF will not have an issue. I don't think BGP will have an issue
either.

-----Original Message-----
From: Giveortake@aol.com [mailto:Giveortake@aol.com]
Sent: Thursday, January 10, 2002 8:25 PM
To: ccielab@groupstudy.com
Subject: Split Horizon

Looking for help with clarification on Split Horizon when using point to
multipoint on sub interfaces...

It is my understanding that when you enable frame relay on a "Physical"
interface, it automatically disables split horizon. So when running the
below protocols, when do I need to make sure that split horizon is running
vs
not running on sub interfaces in a point to multipoint enviornment.

RIP 1&2 ( I believe I want split horizon shut off)

EIGRP Off??

IGRP Off??

OSPF Off??

BGP off??

In its most basic form I thought that In a point-to-multipoint enviornment I

want it off all the time in order for routing updates to be sent back out
the
same physical interface it was learned on. This leads me to think I need
it
off all the time. The various labs I have looked at don't seem to be
consistant so I am in a quandry.

Any help on this one out there??



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