nanog mailing list archives

Re: TCP Window Scaling issue


From: Zach Hill <zach.reborn () gmail com>
Date: Thu, 24 Jul 2014 12:30:15 -0400

Hi Tony. No firewall in the way.

Physical flow is as below.

Server A -> Nexus 7k -> 3845 router -> Sprint MPLS -> 3845 router -> Cisco
3750x stack -> Server B


On Thu, Jul 24, 2014 at 12:25 PM, Tony Finch <dot () dotat at> wrote:

Zach Hill <zach.reborn () gmail com> wrote:

What's interesting is this is only affecting a single server and only
when traffic is going over the WAN circuit. Testing from Server A to any
server on it's network shows it is negotiating window scaling just fine.

Check your firewall isn't buggering about with TCP options.

Tony.
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