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.
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