BGP MTU issue ?

From: Hyunseog Ryu (r.hyunseog@ieee.org)
Date: Fri Aug 22 2008 - 14:09:30 ART


Hi Guys,

I would like to form BGP session between remote locations.

RTR A (GigE MTU 9000 bytes) ---- (GigE MTU 9000 bytes) RTR B (GigE MTU
1500 )--- (GigE MTU 1500 ) RTR C (GigE MTU 9000) --- (GigE MTU 9000) RTR D

With this connection, I would like to form EBGP multihop session between
RTR A and RTR D.
But when I setup, it would not come up because it uses MTU 9000 bytes
for BGP update packet, but the circuit between RTR B and RTR C has 1500
MTU limitation.
I don't have control over those two routers.
Is there any way for BGP to use lower MTU for specific session only ?
I appreciate your help.
Thanks.

Hyun

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