Even if they are decrementing TTL inside of their MPLS core, the TTL
expired message still has to traverse the entire MPLS LSP (tunnel), so
the latency reported for each "hop" is in fact the latency of the last
hop in the MPLS network. Always.
Sam
Robert Richardson wrote:
They probably don't propagate TTL w/in their MPLS core. Depending on how
they have MPLS implemented, you may only see 2 hops on the network; the
ingress and egress routers. If the ingress router was in NYC and the egress
in Seattle, you could understandably expect a large jump in RTT.
Not an ATT customer but do know other providers run their MPLS core's this
way...
-Robert
On Thu, Jun 26, 2008 at 6:09 PM, John T. Yocum <[EMAIL PROTECTED]>
wrote:
