[cisco-voip] Calls to internal numbers fail

[Bob Zanett (AM)]

Interesting.  You would have to investigate how traffic was routing through the port channels to determine exactly why it acted as it did.  Most likely traffic was interacting via different paths.

Glad you found the solution.

Bob Zanett
Technical Services Architect

From: Jonathan Charles [mailto:jonvoip at gmail.com]
Sent: Thursday, February 09, 2012 10:43 AM
To: Wes Sisk
Cc: Mike King; cisco-voip at puck.nether.net; Bob Zanett (AM)
Subject: Re: [cisco-voip] Calls to internal numbers fail

It turned out one the members of a port channel was suspended (access on one side, dot1q on the other). When I fixed that the phones were able to call...

Still doesn't make sense why CCM was able to make the phone ring, but others couldn't connect an audio stream....



Jonathan
On Sun, Feb 5, 2012 at 7:20 PM, Wes Sisk <wsisk at cisco.com<mailto:wsisk at cisco.com>> wrote:
I worked an interesting one of these recently.  Proxy arp caused UCCX install to fail because the router responded to ARP request.

Proxy arp is only supposed to trigger for an ARP request for an IP outside the local subnet.  After careful reading and clearing my mental cobwebs on subnetting this was indeed the case.  In that case the deployment overlaid two IP subnets onto a single L2 domain.

What were the IPs and subnets in your situation?

Regards,
Wes

On Feb 5, 2012, at 5:19 PM, Jonathan Charles wrote:

I have too, the culprit is proxy arp... the gateway here is a Cisco 4510R+E


J
On Fri, Feb 3, 2012 at 8:16 PM, Mike King <me at mpking.com<mailto:me at mpking.com>> wrote:
What's the default gateway on the subnet?

I've seen ASA's do weird things, even to L2 networks.

On Fri, Feb 3, 2012 at 4:59 PM, Jonathan Charles <jonvoip at gmail.com<mailto:jonvoip at gmail.com>> wrote:
All phones are on the same subnet.

On Fri, Feb 3, 2012 at 3:08 PM, Bob Zanett (AM) <bob.zanett at dimensiondata.com<mailto:bob.zanett at dimensiondata.com>> wrote:
This could be a routing issue.

Can your phones see each other at the IP level?   CUCM is what controls call setup/teardown and sends messages to ring your phone.  So in theory, if CUCM sees both IP subnets but the subnet A phones can't see subnet B phones' IPs.    Phone from A calling phone in B, phone will ring but not be able to be answered.  It will drop.

Cheers -
Bob Zanett
Technical Services Architect
Dimension Data Americas

From: cisco-voip-bounces at puck.nether.net<mailto:cisco-voip-bounces at puck.nether.net> [mailto:cisco-voip-bounces at puck.nether.net<mailto:cisco-voip-bounces at puck.nether.net>] On Behalf Of Ted Nugent
Sent: Friday, February 03, 2012 2:17 PM
To: Jonathan Charles

Cc: cisco-voip at puck.nether.net<mailto:cisco-voip at puck.nether.net>
Subject: Re: [cisco-voip] Calls to internal numbers fail




Guess I missed that in your orginal post!

On Fri, Feb 3, 2012 at 3:00 PM, Jonathan Charles <jonvoip at gmail.com<mailto:jonvoip at gmail.com>> wrote:
Replication to where? This is  a CUCUMBEr


Jonathan

On Fri, Feb 3, 2012 at 12:23 PM, Ted Nugent <tednugent73 at gmail.com<mailto:tednugent73 at gmail.com>> wrote:
I'd be looking at replication issues first off

On Fri, Feb 3, 2012 at 12:51 PM, Jonathan Charles <jonvoip at gmail.com<mailto:jonvoip at gmail.com>> wrote:
Already did that, and deleted all.
On Fri, Feb 3, 2012 at 11:45 AM, A A <cciefob at gmail.com<mailto:cciefob at gmail.com>> wrote:

Check route plan report and filter by unassigned DN and delete them
On Feb 3, 2012 10:24 AM, "Jonathan Charles" <jonvoip at gmail.com<mailto:jonvoip at gmail.com>> wrote:
We have phones at a site that cannot call eache other.

The phones are in the phones_pt and have a css of internal_css. Internal_css has phones_pt as the first partition in its css.

Calls ring once and drop.

CCM version is 7.1.5.33900-10<tel:7.1.5.33900-10>

Just an FYI, calls from the gateway, which has a CSS of gateway_css, and also has the phones_pt as its first pt, work fine.

We have checked for duplicate translations, route patterns and have found nothing.

Any ideas?


Jonathan


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itevomcid


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