Issues with SIP packets between VZ Fios and NTT
Pete Rohrman
prohrman at stage2networks.com
Mon May 13 17:52:11 UTC 2019
Dovid Bender,
I'm seeing the same sort of thing. Polycom phones. Multiple
customers getting to me from Verizon in NYC area. I'm seeing phones
register for a while, then drop off, then I see them trying to re-reg
resulting in your 401 below.
Call me. 212 497 8015. Let's look at this.
Pete
Pete Rohrman
Stage2 Support
212 497 8000, Opt. 2
On 5/13/19 12:20 PM, Dovid Bender wrote:
> Thought of that. Customers have their own CPE's. So far the only thing
> mutual here is that it's NTT -> VZ. Here is what I found so far
> looking at two Polycom phones using non standard ports (e.g. not 5060)
> 1) PhoneA tries to register multiple extensions and for each request
> we send a 401. We expect to get back a REGISTER request with a no-once
> but we don't. This happens for a while and then magically it starts
> working.
> 2) PhoneB tries to register the time time as PhoneA and has no issues.
>
> At first I thought it was something possibly with the SIP call-ID but
> I ruled that out since in the same SIP DIALOG it was not working then
> it started. Also the seems to be per phone each phone is behind NAT
> and the traffic is coming from a different NAT'd port. Seems like
> there is some device in the middle that is randomly dropping traffic
> on specific sessions.
>
>
>
>
>
> On Mon, May 13, 2019 at 11:40 AM Brielle Bruns <bruns at 2mbit.com
> <mailto:bruns at 2mbit.com>> wrote:
>
> On 5/13/2019 9:21 AM, Dovid Bender wrote:
> > Hi,
> >
> > Over the last 48 hours we have been getting a lot of alerts of
> customers
> > phones losing registrations to us. All the complaints are coming
> from
> > customers that are on VZ Fios in the NYC area. Anyone else see
> anything
> > strange going on?
> >
>
>
> While you are diagnosing, might check to make sure that the SIP
> ALG is
> disabled on all of their routers too.
>
>
>
> --
> Brielle Bruns
> The Summit Open Source Development Group
> http://www.sosdg.org / http://www.ahbl.org
>
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