It started sometime Tuesday morning. I have yet to set the route back to Qwest. I am going to do that tonight and test it.
On Wed, Nov 9, 2011 at 2:04 PM, Preston Parcell <[email protected]> wrote: > What was the timeframe for your issues? Just curious since we saw some > strangeness last night. > > > Preston > > > > -----Original Message----- > From: Sean Harlow [mailto:[email protected]] > Sent: Wednesday, November 09, 2011 12:00 PM > To: Jay Nakamura > Cc: NANOG > Subject: Re: Anyone seen this kind of problem? SIP traffic not getting to > destination but traceroute does > > I can't say I have a specific answer to your question, but yesterday I was > seeing major packet loss on outbound audio from all my VoIP customers using > Qwest and going in to servers on L3. It's entirely possible that SIP was > also being lost, just the audio was the more notable and pressing issue. It > seems to be resolved at this point, but we have not yet heard from Qwest what > the actual problem was. > > This was with sites in Northeast Ohio and the Chicago area connecting to > servers in New York and LA for what it's worth. > ---------- > Sean Harlow > [email protected] > > On Nov 9, 2011, at 1:47 PM, Jay Nakamura wrote: > >> We ran into a strange situation yesterday that I am still trying to >> figure out. We have many VoIP customers but yesterday suddenly select >> few of them couldn't reach the SIP provider's network from our >> network. >> >> I could traceroute to the SIP providers server from the affected >> clients' IP just fine. I confirmed that the SIP traffic was leaving >> our network out the interface to the upstream provider and the SIP >> provider says they couldn't see the SIP traffic come into their border >> router. >> >> SIP traffic coming from SIP provider to the affected customer came >> through fine. It's just Us -> SIP server was a problem. >> >> I thought there may be some strange BGP issue going on but we had >> other customers within the same /24 as the affected customers and they >> were connecting fine. >> >> The traffic at the time traversed >> >> Our network -> Qwest/century link -> Level 3 -> SIP provider >> >> I changed the routing around so it would go through our other >> upstream, AT&T, and it started working. With AT&T, the route was >> >> Our network -> AT&T -> Level 3 -> SIP provider >> >> So my questions is, is it possible there is some kind of filter at >> Qwest or Level 3 that is dropping traffic only for udp 5060 for select >> few IPs? That's the only explanation I can come up with other than >> the whole Juniper BGP issue 2 days ago left something in between in a >> strange state? I read the post about XO doing filtering on transit >> traffic, I haven't seen anyone say Level 3 or Qwest is doing the same. >> > > >
