[c-nsp] BGP Peer Group drawbacks???
Bob Arthurs
bob_arthurs at hotmail.co.uk
Sat Jan 9 18:31:47 EST 2010
Hi all,
A colleague recently told me not to use BGP peer groups because he insists that there a drawbacks to using them.
Does anyone know of any drawbacks to peer groups????
I dug the following up on the Cisco website:
"Cisco IOS Software Releases earlier than 11.1(18)CC have the
limitations described in this section. Failure to adhere to these rules can
result in inconsistent routing.
If you use peer groups for clients of a route reflector, all the
clients must be fully meshed.
If you use an eBGP peer group, transit cannot be provided among the
peer group members.
All eBGP peer group members must be from the same subnet to avoid
non-connected next hop announcements.
However, these limitations were removed starting with Cisco IOS
Software Releases 11.1(18)CC, 11.3(4), and 12.0. Only the router on which the
peer groups are defined needs to be upgraded to the new code."
But the above limitations have now gone, so I can't think of what drawbacks he might be refering to.
Anyone know??
THanks in advance!
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