Re: OT : user in our Building can't heare the user in the other

this story reminds me of a time when I had a similar problem, building A
were able to initiate a call to building B and talk normally, but building B
could not initiate the call, or the call would be initiated but no voice
going through. Hours later we found out the the switch on one side had been
reloaded and the switch in the other side had not, and for some whatever
reason, packets would be dropped one-way when going through the EtherChannel
trunk between the buildings. Long story short, it only resumed to normal
operations when we reloaded the other switch, don't ask me why.

Not the case here, but we spent more than 16 hours troubleshooting that,
capturing packets that would enter the EtherChannel and not come out in the
other side, etc... that was fun. NOT!

On Wed, Jun 22, 2011 at 6:23 PM, Joe Astorino <joeastorino1982_at_gmail.com>wrote:

> Getting the IP addresses of the two phones would be good like somebody
> said...you can then request the firewall guys take a look at the logs and
> see if the UDP/RTP traffic from B --> A is being dropped.
>
>
> On Wed, Jun 22, 2011 at 4:57 PM, Nish Vamadevan <ipnish_at_gmail.com> wrote:
>
> > As Joe said, since it is a subset of TCP, wouldn't a firewall rule
> allowing
> > UDP will allow RTP traffic?
> >
> > Regards,
> > Nish
> >
> > http://twitter.com/nish
> >
> > -----Original Message-----
> > From: Joe Astorino <joeastorino1982_at_gmail.com>
> > Sender: nobody_at_groupstudy.com
> > Date: Wed, 22 Jun 2011 16:54:07
> > To: -Hammer-<bhmccie_at_gmail.com>
> > Reply-To: Joe Astorino <joeastorino1982_at_gmail.com>
> > Cc: <ccielab_at_groupstudy.com>
> > Subject: Re: OT : user in our Building can't heare the user in the other
> > Building
> >
> > Voice stream is RTP which is carried inside UDP.
> >
> > On Wed, Jun 22, 2011 at 4:50 PM, -Hammer- <bhmccie_at_gmail.com> wrote:
> >
> > > OK. Being a firewall guy I love when people blame the firewall. I'm not
> > > saying it's not the firewall but isn't RTP a TCP transport layer
> > > protocol? I'm not a voice guy so please don't bash me too much. Do the
> > > phones make independent connections (like a send and receive channel)
> to
> > > each other? Which part is stateless?
> > >
> > > -Hammer-
> > >
> > >
> > >
> > > On 06/22/2011 03:28 PM, JB Poplawski wrote:
> > > > Determine the IP addresses of the phones at each site (assuming the
> > > > whole subnet needs to be opened up).
> > > > Verify UDP from their side to your side is valid. If you can't hear
> > > > the other building, the RTP stream is being blocked coming your way.
> > > >
> > > > HTH,
> > > > JB
> > > >
> > > > On Wed, Jun 22, 2011 at 3:17 PM, Joe Astorino<
> > joeastorino1982_at_gmail.com>
> > > wrote:
> > > >
> > > >> Sounds like a firewall issue. I would investigate that the firewall
> > is
> > > >> allowing the proper RTP voice packets from building2 back to
> building1
> > > like
> > > >> JB said. Now, the political implications of said task might be
> harder
> > > than
> > > >> it sounds depending on your relationships with other teams and who
> > runs
> > > the
> > > >> firewall lol
> > > >>
> > > >> On Wed, Jun 22, 2011 at 4:07 PM, wael Ahmed<wsadani_at_gmail.com>
> > wrote:
> > > >>
> > > >>
> > > >>> Hi GS
> > > >>> i have a problem here and i need your sugession
> > > >>> this is the senario
> > > >>>
> > > >>> iptuser(our Building)--------access
> > > >>>
> > > >>>
> > >
> >
> switch1----corswitche1----------------firewall--------coreswitch2---------acess
> > > >>> switch2------ iptuser(otherbuilding)
> > > >>>
> > > >>>
> > > >>> The unified Communication conected to coreswitch1
> > > >>>
> > > >>> coreswitch1 connecetd to firewall by Fiber it is end 10.20.91.100
> the
> > > >>> firewall end 10.20.91.105
> > > >>> My responsability till only coreswitch1 and there is seperated team
> > to
> > > the
> > > >>> firewall coreswitch2
> > > >>>
> > > >>> ipt user(our Building) can heare each other
> > > >>> ipt user (other Building ) can heare eah other
> > > >>> ipt user (other Building ) can heare ipt(our Building)
> > > >>> ipt user (our Building) can't heare iptuser(othe Building)
> > > >>>
> > > >>>
> > > >>>
> > > >>> voice vlans are in access switch 1 and coreswitch 1 vlan 230
> > > >>> voive vlan are in acce switch 2 and coreswitch2 vlan 111
> > > >>> any idea
> > > >>> thanks
> > > >>>
> > > >>>
> > > >>> Blogs and organic groups at http://www.ccie.net
> > > >>>
> > > >>>
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> > > >>>
> > > >>>
> > > >>>
> > > >>>
> > > >>
> > > >> --
> > > >> Regards,
> > > >>
> > > >> Joe Astorino
> > > >> CCIE #24347
> > > >> Blog: http://astorinonetworks.com
> > > >>
> > > >> "He not busy being born is busy dying" - Dylan
> > > >>
> > > >>
> > > >> Blogs and organic groups at http://www.ccie.net
> > > >>
> > > >>
> > _______________________________________________________________________
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> _______________________________________________________________________
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> > >
> > >
> > >
> > >
> > >
> > >
> >
> >
> > --
> > Regards,
> >
> > Joe Astorino
> > CCIE #24347
> > Blog: http://astorinonetworks.com
> >
> > "He not busy being born is busy dying" - Dylan
> >
> >
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> >
> > _______________________________________________________________________
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> >
> >
> >
> >
> >
> >
> >
>
>
> --
> Regards,
>
> Joe Astorino
> CCIE #24347
> Blog: http://astorinonetworks.com
>
> "He not busy being born is busy dying" - Dylan
>
>
> Blogs and organic groups at http://www.ccie.net
>
> _______________________________________________________________________
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Received on Wed Jun 22 2011 - 19:34:49 ART