TCP Window Scaling issue

Zach Hill zach.reborn at gmail.com
Thu Jul 24 16:51:30 UTC 2014


Also just to reiterate I would lean more heavily on something fishing in
the WAN cloud if all traffic from Site 1 to Site 2 were not seeing tcp
window scaling properly, however it's only for Server A that is seeing
this. Server A is able to properly TCP window scale for any local traffic.


On Thu, Jul 24, 2014 at 12:47 PM, Zach Hill <zach.reborn at gmail.com> wrote:

> Hi Machael,
>
> Let me setup another packet capture at each side to see if the initial
> packets are being modified at all.
>
> Thanks,
>
>
> On Thu, Jul 24, 2014 at 12:39 PM, Michael Brown <michael at supermathie.net>
> wrote:
>
>> On 14-07-24 12:30 PM, Zach Hill wrote:
>> > 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
>> >
>> I blame the cloud.
>>
>> Dump the actual packets as they leave Server A and arrive at Server B
>> (and vice-versa!). Does it get modified en route?
>>
>> M.
>>
>> --
>> Michael Brown            | The true sysadmin does not adjust his behaviour
>> Systems Administrator    | to fit the machine.  He adjusts the machine
>> michael at supermathie.net  | until it behaves properly.  With a hammer,
>>                          | if necessary.  - Brian
>>
>>
>


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