From: Howard C. Berkowitz (hcb@gettcomm.com)
Date: Mon Feb 24 2003 - 17:13:25 GMT-3
At 12:30 PM -0500 2/24/03, OhioHondo wrote:
>Since BGP runs as a higher layer protocol (on top of TCP) split horizon does
>not apply.
Why do you think TCP would make a difference in loop detection?
BGP is not strictly a DV protocol. Its primary loop detection method
is examining incoming AS paths (i.e., path vectors) and rejecting
those that contain the local AS number.
There are additional methods, for iBGP using confederations and RR's,
to reduce/eliminate transient internal loops/oscillation, but these
are probably outside the CCIE scope.
It isn't completely clean, as BGP/PV is provably loop-free only when
additional policies are NOT used.
>
>-----Original Message-----
>From: nobody@groupstudy.com [mailto:nobody@groupstudy.com]On Behalf Of
>Pedro Eira
>Sent: Monday, February 24, 2003 10:36 AM
>To: ccielab@groupstudy.com
>Subject: split-horizon & BGP
>
>
>Hello, Would split-horizon have any effect on BGP?Should I follow the
>same rules for BGP as I do for other DV routing protocols when
>split-horizon is involved?
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