Level3 routing issues

Wed Jul 29 18:27:03 UTC 2015

Since 7:30AM CDT Friday morning, we've seen strange problems across L3
where around 1-2% of traffic flows are dying. It is interesting behavior in
that new flows from the same source to the same destination work, however,
in the cases where the traffic is stopped we never receive the SYN-ACK nor
any of the retransmits. The destination side continues to receive the SYN
retransmits.

On Wed, Jul 29, 2015 at 6:52 AM, Robert Blayzor via NANOG <nanog at nanog.org>
wrote:

> On Jul 28, 2015, at 8:54 PM, Matt Hoppes <mhoppes at indigowireless.com>
> wrote:
> >
> > Is anyone seeing packet loss or routing issues on the Level3 network on
> the east coast right now?
> >
> >
>
>
> We’ve seen a slew of problems going west out of Level3 in NYC the last
> couple of nights. Last night was particularly bad to the point we had to
> shut our Level3 BGP sessions down to route around the issue.
>
> --
> Robert
> inoc.net!rblayzor
> Jabber: rblayzor.AT.inoc.net
> PGP Key: 78BEDCE1 @ pgp.mit.edu
>
>
>
>
>