From: Petr Lapukhov (petrsoft@gmail.com)
Date: Mon Apr 03 2006 - 06:26:14 GMT-3
Hello Vijay,
AFAIK "TCP window scaling" in IOS works for IOS' own TCP/IP stack
(i.e. for connections originated/terminated on router) and has nothing
to do with performance enhancement for network end devices...
HTH
Petr
2006/4/3, Vijay Ramcharan <vramcharan@totality.com>:
>
> Hi Group,
> I've got this 45Mbps MPLS pipe between a NY office an SF office. An issue
> that is new to me is the effect of a 70ms latency on data transfers across
> this distance. I saw that the BDP will yield a max of 3Mbps over this
> link.
> That is the approximate speed that we're seeing on a transfer of a 1GB
> file.
>
> I know I can use multiple transfer streams and tweak buffers and TCP
> window
> sizes on the servers at these sites. I know there are products out there
> from Packeteer and Juniper (and others) for "WAN acceleration" which
> overcome the latency in LFNs.
> HPN-SSH was also tested for the file transfer and while the improvement is
> good, it's not going to solve the problem.
>
> I came across the link below:
>
>
http://www.cisco.com/en/US/products/ps6350/products_configuration_guide_chap
> ter09186a00804550e6.html
>
> I was wondering if anyone has used this feature and if so, did it make a
> noticeable difference?
>
> Basically I'm looking for a solution which doesn't involve modifications
> at
> the server OS level. If it's going to require a pair of those WAN
> acceleration devices, then I guess that would be my only other option.
>
> Thanks for your input.
>
> Vijay Ramcharan
>
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