From: MOLINA, MARTIN J *Internet* (PBI) (mm1343@xxxxxxx)
Date: Fri Jan 11 2002 - 01:50:17 GMT-3
Typically you want split horizon enabled (turned on) for all distance vector
protocols such as IGRP and RIP when you're using physical Frame Relay
interfaces(the default is disabled in this case). OSPF will not have an
issue. A nasty mess can be created if you leave it disabled and try to
inject routes toward that interface. Enable it or use distribute lists to
control route feedback.
-----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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