Cisco IP Phones going down when CUCM publisher is turned off

[Geo Gon]

Hi all,

Quick question:

I have on my lab environment a CUCM Publisher and a CUCM Subs.

As I understand, the subscriber is only there for redundancy purposes, and the phone should be registered to the subs as opose to the pub.

All my IP phones register to the subscriber, but when I kill my publisher, all the phones are losing its registration.

Aren't they meant to be still registered?

Thanks

[Chris Deren]

What is the CUCM group configured like?

Is cm service running on the subs?

Do the phones show registered to the subs?

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[Geo Gon]

Hi Chris, thanks for  your reply.

I'm still quite new to all this.

CM service is running on the sub.

When the pub and sub are on, it shows that the phones are registered to the pub, even though the tftp address on the ipphones are poiting to the sub.

I have 4 CUCM groups configured, just for lab porpuses, but im only using one of them.

Just noticed that when switching off the pub, all the replicated data that is meant to be on the sub, is not there. Users, Phones etc.. all gone. 

??

thanks

[robloeber]

I dont think your Pub and Sub are replicating properly.  I also think you CM groups are not configured properly.  You need to verify whether or not replication is working properly before you look at anything else.  I usually do this from the CLI using the following command:  utils dbreplication runtimestate

You can also use RTMT if you have it installed.  You want to make sure the status comes back as status 2.  Any other status means you have replication troubles.

[Chris Deren]

Looks like you have db replication issues. Search this forum for dbreplication and you'll find many good threads.

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[nikshah]

you might want to login to the cli of the pub and run the following commands that we have a good dbrepln

utils dbreplication runtimestate

utils dbreplication status

utils network host (hostname and ip of the sub), repeat the same from the sub

utils ntp status

see if this all good

Take a dummy phone /test phone change the description like test 1

fro the ssh run the command run sql select * from device where description ='test1'

run it on both the nodes and both the entries should be same.

hope this helps

[Geo Gon]

Hi all,

When I type utils dbreplication status that's what I have.

PUB

connect to geovanipub_ccm7_0_1_11000_2 failed

Enterprise Replication not active  (62)

command failed -- unable to connect to server specified  (5)

SUB

SERVER                 ID STATE    STATUS     QUEUE  CONNECTION CHANGED

-----------------------------------------------------------------------

g_geovani_ccm7_0_1_11000_2    2 Active   Connecting 445296               

g_geovanisub_ccm7_0_1_11000_2    3 Active   Local           0               

-------------------------------------------------

[Ayodeji Okanlawon]

Hi,

Can you ping between your publisher and subscriber?

[Geo Gon]

Hi,

Yes, I can ping between them.

[nikshah · Accepted solution]

you might want to run utils network connectivity on the sub and see if it completes successfully.

any fw between the pub and sub..

its definitely a db replication problem.

if the above tests that i mentioned above are successfull including utils network connectity. you would want to run a stop and roll.

utils dbreplication stop on the sub (wait for it to complete)

utils dbreplication stop on pub

utils dbreplication reset all from the pub.

[Geo Gon]

Thanks very much.

I did run all the test you mentioned before, and it was sucessfull.

Will now try to stop and roll, see what happens

Cheers

[Geo Gon]

Right:

After doing the above, by nikshah this is what happened:

Pub replication status = 3

Sub replication status = 4

Pub utils dbreplication status:

SERVER                 ID STATE    STATUS     QUEUE  CONNECTION CHANGED

-----------------------------------------------------------------------

g_geovanipub_ccm7_0_1_11000_2    2 Active   Local           0               

Status cannot be reported when replication is down on a publisher, or for a cluster with a single active node; aborting status check operation

Sub utils dbreplication status:

connect to geovanisub_ccm7_0_1_11000_2 failed

Enterprise Replication not active  (62)

command failed -- unable to connect to server specified  (5)

Status cannot be reported when replication is down on a publisher, or for a cluster with a single active node; aborting status check operation

Both the sub and pub can ping each other, and when i check the phones, users, etc on the sub they are all there, as long as the pub is on.

thanks again folks

[nikshah]

it seems your replication aggreements never got setup.

It takes a while for the replication to be setup, can you verify the latest status.

sorry couldnt respond earlier.

[knovak123]

Did you change the name of either of the servers?

There is a very specific process for changing the name of a UCM server.

If it is not followed, it may be easier to just delete the sub from the cluster DB and re-add then re-install the sub.

To repair after changing without following the process typically requires TAC to root in and edit all of the hosts, rhosts, sqlhosts, etc.

Thanks,

Kevin

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[Geo Gon]

Hi Guys, I didn't change the names or anything.

To be fair, I dont even know if it was working before.

Anyway, I have solved the problem by reinstalling the sub and the pub. All good now.

One other thing.

Cisco advises us to register phones with the subs right?

So, on my ip phones, I'm pointing it to my sub, the things is, if I kill my sub, I'd lose all the phones.

How's the redundancy suppose to work?

thanks again for your help