TCP Window Scaling issue

Larry Sheldon LarrySheldon at cox.net
Fri Jul 25 02:07:44 UTC 2014


On 7/24/2014 11:51 AM, Zach Hill wrote:
> 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
>>>
>>>
>>
>


-- 
Requiescas in pace o email           Two identifying characteristics
                                         of System Administrators:
Ex turpi causa non oritur actio      Infallibility, and the ability to
                                         learn from their mistakes.
                                           (Adapted from Stephen Pinker)


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