[c-nsp] Caution ME3600CX breaks TCP forwarded/local !!!

[Mark Tinka]

On Tuesday, February 04, 2014 12:14:17 PM Adam Vitkovsky 
wrote:

> It has been identified that the TCP path MTU discovery
> process is failing somehow and manually tuning "ip tcp
> mss" on a CE or lowering MTU on hosts solves the issue.
> (Tuning "ip tcp mss" on MEs did not have any effect).
> Since we ran out of ideas to pin point the failure I
> have decided to enable MPLS IP TTL propagation on the
> penultimate ME which fixed the problem. How? I don't
> know.

"ip tcp mss" not working on your backbone makes sense as 
this is inferred from the point of view of the switch being 
a host, not a router (you know, like BGP sessions, FTP 
connections to/from the switch, e.t.c.).

MTU changes would help.

Mark.
-------------- next part --------------
A non-text attachment was scrubbed...
Name: signature.asc
Type: application/pgp-signature
Size: 836 bytes
Desc: This is a digitally signed message part.
URL: <https://puck.nether.net/pipermail/cisco-nsp/attachments/20140204/8a3231ac/attachment.sig>