Ben,
My first question would be how big is your prefix list per BGP session?
What is really going to task this router with 25 sessions is the BGP
Scanner and BGP Router processes. To my knowledge MD5 is just for
authenticating the session. I could be wrong.
Tony Newell
Technical Lead
RTSG-BB IP Networking
Every TCP packet in the BGP session (including HELLOs) will have to go through the MD5 process.
This happens even if things like the sequence number is wrong (at least on some versions of IOS).
* Patrick W.Gilmore <patrick@ianai.net> [2004-06-11 20:54]:
>My first question would be how big is your prefix list per BGP session?
>What is really going to task this router with 25 sessions is the BGP
>Scanner and BGP Router processes. To my knowledge MD5 is just for
>authenticating the session. I could be wrong.
Every TCP packet in the BGP session (including HELLOs) will have to go
through the MD5 process.
there is no HELLO in bgp. and it is not really related to bgp either,
it is just the common case that they're used together. with tcp md5sig,
each and every packet gets a md5 signature - build from the packet header
and a shared secret - added, and the receiving side - which, of course,
has to have the secret for that - does the same again. if the signature
in the packet and the signature the receiver calculated don't match,
the packet is discarded (well, should. FreeBSD's implementation does
sign outgoing packets and simply ignores signatures on incoming
packets, very useful. ok, I don't know wether this has been fixed, but
thanks for the laugh).
This happens even if things like the sequence number is wrong (at least
on some versions of IOS).
I consider this Yet Another IOS Bug.