[c-nsp] Network performance question - TCP Window issue?

[Andrew Miehs]

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?

This might also make some good reading:

http://knol.google.com/k/understanding-network-and-internet-latency

Cheers

Andrew