12-31-2015 09:02 AM - edited 03-17-2019 05:22 AM
Hi, After the following commands are entered, the phone turns into Not registered status. The phone cannot get ip address again. I am not sure if the "Not registered" is related with these commands. Anyone have comments? Thank you in advance.
gatekeeper
zone local VIAGK voice.com
zone remote BBGK Cisco.com 10.26.1.253 invia VIAGK outvia VIAGK
zone prefix BBGK 01132
Solved! Go to Solution.
12-31-2015 11:14 PM
The ip phone registration to cucm or cme would not be affected by these commands. You can enable packet capture on one of the phones while trying to reproduce the issue so that it can be checked why the phone unregistered.
Manish
01-01-2016 12:46 PM
Hi,
No... gatekeeper is not the issue in this case even because is not an element that influence phone registration.
You should look at network topology and routing.
Maybe , in this case, gatekeeper is also the gateway for phones vlan and you are missing ip helper-address command on ip interface in phones vlan.
Please let us know
Regards
Carlo
12-31-2015 11:14 PM
The ip phone registration to cucm or cme would not be affected by these commands. You can enable packet capture on one of the phones while trying to reproduce the issue so that it can be checked why the phone unregistered.
Manish
01-01-2016 08:03 AM
Thank you for your reply. Can you tell a little bit more about enable packet capture or what commands can enable packet capture?
01-01-2016 09:04 AM
Hi,
Please check this
https://supportforums.cisco.com/document/44741/collecting-packet-capture-cisco-ip-phone
Manish
01-01-2016 12:03 PM
2. Enable the Span to PC port feature.
From the IP phone configuration page, scroll down to the Protocol Specific Configuration section, and enable the "Span to PC Port" configuration option. This will trigger a change to the phone's TFTP configuration file. Save and reset the phone so it can retrieve the new configuration file.
The link document mentioned "IP phone configuration page". Where is it? Is it in CUCM or other place? Thank you
01-01-2016 12:14 PM
Hi,
where is configured the DHCP server? In a vg or cucm?
Is the unregistered phone on a remote site or in the same site of CUCM?
Please let me know
Regards
Carlo
01-01-2016 12:37 PM
The DHCP is in CUCM. the phone is in the same site with cucm. Now the phone cannot get ip address
The phone was registered before. The phone is unregisted just after setting up gatekeeper. Thank you!
01-01-2016 12:46 PM
Hi,
No... gatekeeper is not the issue in this case even because is not an element that influence phone registration.
You should look at network topology and routing.
Maybe , in this case, gatekeeper is also the gateway for phones vlan and you are missing ip helper-address command on ip interface in phones vlan.
Please let us know
Regards
Carlo
01-01-2016 01:38 PM
I check connection and ip-helper etc. Everything is Ok. I think the DHCP cannot work even since PC connecting the vlan cannot get the ip address. I am going to reinstall the DHCP. Thank you
01-01-2016 02:07 PM
I have not reinstalled DHCP in CUCM yet, but after I assigned ip address to the phone manually, it is registered. Strange, the DHCP server in cucm cannot work. I checked its configuration in cucm and router several times. All config are correct.
01-01-2016 02:28 PM
Hi,
I don't know which version of CUCM you are running but you don't need to reinstall just restart dhcp monitoring service and try again to enable dhcp client on the IP Phone
Let me know
Regards
Carlo
01-01-2016 04:01 PM
Excellent idea! after unchecking and checking of dhcp munitoring service, the phone can get ip add. Thank you.
I checked some documents. seems like Cisco recommend using external dhcp if cucm is 10.5, but I am using 9....
01-01-2016 04:33 PM
Hi,
As per SRND 10.5 but even for 9.0, for small deployments (below 1000 users) you can configure DHCP on CUCM server.
Larger deployments require an external DHCP server
http://www.cisco.com/c/en/us/td/docs/voice_ip_comm/cucm/srnd/collab10/collab10/netstruc.html#14097
HTH
Regards
Carlo
Discover and save your favorite ideas. Come back to expert answers, step-by-step guides, recent topics, and more.
New here? Get started with these tips. How to use Community New member guide