[c-nsp] BGP MSS=576 bytes

[Phil Mayers]

Antonio M. Soares wrote:
> Hello group,
> 
> I have a 6500 running 122-18.SXF7 with lots of BGP peers and all of the BGP sessions have negotiated a MSS of 536 bytes. Here's an

I think you need a newer IOS. Certainly under SXI I see:

ac-core#sh ip bgp neighbors  | inc path-mtu|max data seg
   Transport(tcp) path-mtu-discovery is enabled
Datagrams (max data segment is 536 bytes):
   Transport(tcp) path-mtu-discovery is enabled
Datagrams (max data segment is 1460 bytes):
   Transport(tcp) path-mtu-discovery is enabled
Datagrams (max data segment is 9060 bytes):
   Transport(tcp) path-mtu-discovery is enabled
Datagrams (max data segment is 536 bytes):

...depending on whether the neighbor is similarly equipped to be 
jumbo-framed and PMTU.