We have recently had a 50Mb ethernet service provisioned between 2 POPS - Latency is approx. 13m/sec.
Testing the service, we are only able to achieve ~800K/sec (FTP+HTTP between 2 Linux boxes) in a single session(If we run multiple tests simultaneously, each single session is able to achieve approx. 500K/sec, but the aggregate total gets up to ~20Mb(If we ran more sessions, I can only assume we would be able to reach 50Mb)
We have an existing ATM service(13Mb), and performing the same test between the 2 Linux boxes, we are able to achieve 1.1->1.2 Mb/sec.
The Ethernet provider has tested the service(RFC 2544) and confirmed 50Mb throughput.
Ethernet provider is suggesting we modify tcp window size - I can see this can be done in global config mode (ip tcp window-size 80000), but this would affect all Interfaces? Would there be any adverse affects from doing this?
Ethernet provider has also suggested we implement rate-limiting on our Interfaces...both ends are connected to 2950's, which are then trunked up to 7204VXR's as dot1q Ints....I'm assuming we will need to do the rate-limiting on the 7200's?
Thanks in advance.