[j-nsp] BGP MTU Mismatch

[Mark Tinka]

On Thursday, June 23, 2011 12:03:12 AM Payam Chychi wrote:
 
> However when your going cisco/juniper there is always a
> mismatch as juniper does not take into accnt the 4byes
> required for crc so fragmentation happens and if the pkt
> has DF set (as it should since max mtu negotiated on is
> suppose to be safe) the other side well drop the pkt and
> thus killing the bgp update pks and eventually timing
> out.
> 
> Is why I set the juniper side +14 bytes to ensure mtu
> problems done come up (+18 on links doing dot1q)

This is certainly true for IOS, but IOS XR (CRS and 
ASR9000/9900) is now similar to Junos re: interface MTU 
configuration.

Makes things interesting when you have Junos, IOS and IOS XR 
running in your environment.

Cheers,

Mark.
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