TCP Window Scaling issue

Zach Hill zach.reborn at
Thu Jul 24 19:13:44 UTC 2014

All are from SPAN ports at each end. So for the second round of packet
captures Site 1 is from a SPAN port off the NIC of Server A. Site 2 is from
a SPAN port off the NIC of the MPLS router.

The first round of packet captures are only from the SPAN port off the MPLS
router at Site 2.

On Thu, Jul 24, 2014 at 3:08 PM, <Valdis.Kletnieks at> wrote:

> On Thu, 24 Jul 2014 14:33:56 -0400, Zach Hill said:
> > First is the SYN from Server A to Server B
> Was this captured with tcpdump on Server A on its way out, or on Server B
> on its way in, or at some other point using a span port?  The answer
> matters
> if we're suspecting that something along the way is stomping the option....

More information about the NANOG mailing list