[cisco-voip] [cisco-VoIP] Odd CUCM IP Phone Registration behavior during Migration

[Joel Perez]

I had a similar issue happen to me a few years back during a migration. In
my case it turned out that some of the phones had CTL files and needed to
be manually removed before they would register to the new CUCM servers.

Check the phone logs it should let you know what is going on with them or
at least give you a decent enough indication.

Joel P


On Sat, Jul 27, 2013 at 8:33 PM, Kenneth Hayes <kennethwhayes at gmail.com>wrote:

>
> Have you checked to see any ITL or CTL files on the phone?
> Sent from my iPhone
>
> On Jul 27, 2013, at 7:05 PM, Mike Lydick <mike.lydick at gmail.com> wrote:
>
> What does the phone log say? What are the phone load version's?  Also a
> packet capture would help diagnostic to see if the phone is get replys from
> the infrastructure (cdp dhcp sccp).
> On Jul 27, 2013 7:28 PM, "Dana Tong" <Dana_Tong at bridgepoint.com.au> wrote:
>
>>  Yes. Tried that also and it failed.
>>
>>  I checked the OS admin guide or the release notes late last night and
>> it says - Caution. If you go to an unrestricted release you will not be
>> able to go back via upgrade or a fresh install. Does this mean that there's
>> something that is copied to the phone firmware that stops it from ever
>> going back to a restricted release even on new hardware?
>>
>>
>>  Regards,
>> Dana Tong
>>
>> ----- Reply message -----
>> From: "Travis L. Dennis" <tdennis at DataSourcePro.com>
>> To: "Dana Tong" <Dana_Tong at bridgepoint.com.au>, "
>> cisco-voip at puck.nether.net" <cisco-voip at puck.nether.net>
>> Subject: [cisco-VoIP] Odd CUCM IP Phone Registration behavior during
>> Migration
>> Date: Sun, Jul 28, 2013 5:09 AM
>>
>>  Have you tried resetting one of the problematic 7940 pones to factory
>> default and let it try to register?
>>
>>
>>
>> *From:* cisco-voip [mailto:cisco-voip-bounces at puck.nether.net] *On
>> Behalf Of *Dana Tong
>> *Sent:* Saturday, July 27, 2013 10:37 AM
>> *To:* cisco-voip at puck.nether.net (cisco-voip at puck.nether.net)
>> *Subject:* [cisco-voip] Odd CUCM IP Phone Registration behaviour during
>> Migration
>>
>>
>>
>> Good morning all,
>>
>>
>>
>> Weird one tonight.
>>
>>
>>
>> Customer has a CUCM version 7.1(5) with approx. 900 handsets of 7912’s,
>> 7940’s etc.
>>
>>
>>
>> So I built up a new CUCM version 9.1(1) on new UCS hardware (vmware) and
>> everything looks fine. I cleaned up all the data an implemented some of the
>> intelligent call routing features in newer CUCM etc. Tested with some brand
>> new 7942’s out of the box and all is good.
>>
>>
>>
>> Tonight I get onsite to perform the migration. I start with the first
>> site. ~110 phones. Update the DHCP option 150 and reset the phones.
>>
>>
>>
>> Now about 40 of the ~110 phones come across and register to the new CUCM
>> ok. This leaves some 70 phones reporting configuring IP. The DHCP is on the
>> router, and the router connected to the LAN via a dot1q trunk.
>>
>> The registered phones are all of the 7912’s and some 7940’s.
>>
>>
>>
>> Two of the phones close by are 7940’s. One is registered and one is not.
>> They both have the same firmware. They are both on the same access switch.
>> The unregistered phone does not have an IP address. However the router’s
>> ARP and DHCP has an IP address in its database. I cleared the ARP, and
>> cleared the DHCP bindings. Restart the phone. I see the DHCP request in the
>> debugs and an address get assigned but the phone still doesn’t get an IP.
>>
>>
>>
>> So I manually set an IP address on the phone. It still won’t register. I
>> set a continuous ping to the phone and I get maybe 2% ping response. With
>> some response times up in the 190ms range. Weird. This is all LAN based.
>> Check spanning tree and that’s ok. The TAC have investigated and they are
>> stumped. They ask me to log another fault for the switching guys. A PC
>> behind the phone in the voice VLAN also has perfect pings to the new CUCM.
>> So it seems phone related.
>>
>>
>>
>> Anyways so I do some more troubleshooting. Roll back the DHCP option 150
>> and reset all the phones. They all re-register with the old cluster no
>> problems.
>>
>>
>>
>> I configure a new VLAN on the switches and new sub-interface on the
>> router. Configure a new DHCP scope for the new range and configure this
>> phone to use that new VLAN. At this point I haven’t added the new subnet to
>> BGP to this subnet cannot see the Data Centre VLANs.
>>
>> The phone comes up in the test VLAN and gets an IP address ok. I can ping
>> the phone and have no loss.
>>
>> I configure the BGP routing and now the new subnet is advertised into the
>> network and I can reach the CUCM.
>>
>> Immediately, the phone starts dropping pings and is showing the same
>> sporadic response and packet loss.
>>
>> I remove the subnet from BGP and now the phone is 100% responsive again.
>> What the???
>>
>>
>>
>> So it seems there is an issue when the phone is trying to register to the
>> new CUCM. I’ve just checked the old cluster and noticed that this system is
>> running 7.1(5) UNRESTRICTED. So the last upgrade which was done for this
>> customer, it seems someone had installed the UNRESTRICTED version. Is this
>> affecting my migration? The new cluster is a fresh build of UCM 9.1
>> straight on to new UCS hardware. So it’s a standard restricted ISO.
>>
>> I know that once you go UNRESTRICTED you cannot go back. However this was
>> not an upgrade or backup/ restore. Remember this is a fresh build.
>>
>>
>>
>> Anyways I’m stumped. Can you guys think of anything??? It seems to be
>> related the 7940 series phones. We tried another site and all of the 7912’s
>> migrated fine but the 7940’s didn’t. But then again there were “some”
>> 7940’s in the HQ site which did work.
>>
>>
>>
>> Thanks in advance.
>>
>>
>> Cheers
>>
>> Dana
>>
>>
>>
>>
>>
>>
>>
>>
>>
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