> > On 29/04/2012, at 5:34 PM, CiscoNSP_list CiscoNSP_list wrote: > > Have 3 POPs A,B+C (A connected to B via 200Mb Eth, B connected to C via > > 250Mb Eth), all POPs are 7200's with 2960's and 3560's > > > > Latency: > > > > A -> B, 2 - 3 m/sec (No packet loss, minimal jitter) > > B -> C, 12 - 13 m/sec (No packet loss, minimal jitter) > > There is a huge latency difference between A-B and B-C. (about 5 times!) > How far are these sites apart?
A+B about 70K's B+C about 1000K's I've just checked in the opposite direction (C -> A) and I see ~4.5M/s - A's on a 10/100 port, C's on a Gig port...so pulling from C->A would be Gig, 250, 200, 100 (where I see 2.15M/s), but in the other direction (pulling from A->C) would be 100, 200, 250, Gig... > > This might also make some good reading: > > http://knol.google.com/k/understanding-network-and-internet-latency > Thanks - Will have a read. _______________________________________________ cisco-nsp mailing list [email protected] https://puck.nether.net/mailman/listinfo/cisco-nsp archive at http://puck.nether.net/pipermail/cisco-nsp/
