North American Network Operators Group Date Prev | Date Next | Date Index | Thread Index | Author Index | Historical Re: Possible explanations for a large hop in latency
When I asked ATT about the sudden latency jump I see in traceroutes, they told me it was due to how their MPLS network is setup. --John Frank Bulk wrote: Our upstream provider has a connection to AT&T (12.88.71.13) where I relatively consistently measure with a RTT of 15 msec, but the next hop (12.122.112.22) comes in with a RTT of 85 msec. Unless AT&T is sending that traffic over a cable modem or to Europe and back, I can't see a reason why there is a consistent ~70 msec jump in RTT. Hops farther along the route are just a few msec more each hop, so it doesn't appear that 12.122.112.22 has some kind of ICMP rate-limiting.
|