Jump to content

Cisco 7971G loses registration


Doug
 Share

Recommended Posts

I have a Cisco 7971G. When it starts it registers with no problems. It seems o work fine.

 

After about 10 minutes it loses the registration.

 

When I reboot it, it registers fine again but loses the registration.

 

If I manual register it, all seems to work. Initially I see the automatic registration along with the manual one, but then the automatic one disappears.

 

The firmware versio is SIP70.8-3.2S.

 

This phone works fine on other IP PBX systems.

 

Doug

Link to comment
Share on other sites

I have a Cisco 7971G. When it starts it registers with no problems. It seems o work fine.

 

After about 10 minutes it loses the registration.

 

When I reboot it, it registers fine again but loses the registration.

 

If I manual register it, all seems to work. Initially I see the automatic registration along with the manual one, but then the automatic one disappears.

 

The firmware versio is SIP70.8-3.2S.

 

This phone works fine on other IP PBX systems.

 

Doug

 

Check 'timer_register_expires' on the CISCO phone. Default is 3600, if not set it and see it changes the behavior.

Otherwise, can you verify the 'nat_enable' settings on the CISCO? If it is set to 0 (zero) try setting it to 1 and reboot the phone. If you can telnet to the phone, verify the value after the reboot.

Link to comment
Share on other sites

I am running this same phone with PBXnSIP without a problem. The only difference i see is you have some real old firmware. The oldest I have tried is 8.4.2 and I am currently running 8.4.4 I do have my registration timer set to 3600

Link to comment
Share on other sites

The timeout is set to 3600.

 

The nat_enabled only seems to apply to the 7960 serirs config files. I am not sure how to enter that in the XML format.

 

I will try to get firware 8.4.3 or higher.

 

I will let you know.

 

Thanks.

 

Doug

Link to comment
Share on other sites

I have never used the nat setting on a xml based cisco phone. I have only used it on a 7960 and only when it was behind a crappy router that was not sip aware.

 

Do you happen to have a copy of your config you could post?

 

Is your phone connecting directly to the PBXnSIP (No Nat)

 

Are you seeing it loose it's registration on PBXnSIP, on the phone, or both?

Link to comment
Share on other sites

I took the sample XML file on the interop support page for the Cisco phone and copied critical differences from my old XML file.

 

It now works without losing the registration.

 

When I have nothing to do I will try to determine the problem, but for now it works.

 

Thanks for everyones help.

 

Doug

Link to comment
Share on other sites

  • 3 months later...

Hey.

 

You figured out what the issue was ? I am currently setting up cisco 7940/7941 phones connected through a Dell powerconnect 6224p switch, and i am experience the same problem you had.The phone registers fine on powerup, but in a while it looses its configuration and goes back to register again, and stays there until i powercycle it.

 

The LLDP information on the Powerconnect also dont include any information, seemingly it wont speak with the phone, or vice versa. I have considered everything but cannot find the problem. Would be absolutely killer if you could point out what did the trick.

 

Phone is using LLDP to get vlans/dhcp etc, not much static configuration on the phone itself

Link to comment
Share on other sites

Hey.

 

You figured out what the issue was ? I am currently setting up cisco 7940/7941 phones connected through a Dell powerconnect 6224p switch, and i am experience the same problem you had.The phone registers fine on powerup, but in a while it looses its configuration and goes back to register again, and stays there until i powercycle it.

 

The LLDP information on the Powerconnect also dont include any information, seemingly it wont speak with the phone, or vice versa. I have considered everything but cannot find the problem. Would be absolutely killer if you could point out what did the trick.

 

Phone is using LLDP to get vlans/dhcp etc, not much static configuration on the phone itself

 

If the phone is behind NAT, then make sure that 'nat_enable:1" is set on the phone config.

Link to comment
Share on other sites

Hi.

Thanks for the quick reply.

 

There is no nat in this specific setup.the CCM resides on another vlan with its own ip scope, but this inter-vlan routing is done via a core L3 switch. Figured it could be some kind of spanning-tree issue but have tossed away that idea.So im back to being baffled and hoping for some config/firmware related issue.Didnt get to write down all the firmware information, but if hope one of these two makes sense SCCP41.8.3-3S and 7941G_64-02070631amd.

 

As you can see, im not a voice guy, just happened to do work on some switches with these connected :)

Link to comment
Share on other sites

Hi.

Thanks for the quick reply.

 

There is no nat in this specific setup.the CCM resides on another vlan with its own ip scope, but this inter-vlan routing is done via a core L3 switch. Figured it could be some kind of spanning-tree issue but have tossed away that idea.So im back to being baffled and hoping for some config/firmware related issue.Didnt get to write down all the firmware information, but if hope one of these two makes sense SCCP41.8.3-3S and 7941G_64-02070631amd.

 

As you can see, im not a voice guy, just happened to do work on some switches with these connected :)

 

Well the SCCP means CISCO phone is not running the SIP image. You will have to upgrade/convert the phone to SIP first.

Link to comment
Share on other sites

Well the SCCP means CISCO phone is not running the SIP image. You will have to upgrade/convert the phone to SIP first.

 

 

The phones work fine from Cisco switches with voice vlan defined, so i dont think that should be an issue.Only difference is that the phones are connceted to a Dell switch.

Interesting part is that if i specify the operative Vlan(via administrative settings) on the phone, it sets the vlan properly, gets its IP and works like a charm. When using only LLDP-med it seems to set it(based on the outcome of lldp outcome on remote-devices), but it wont work properly.

 

Im starting to believe this is a issue with the Dell switches, so im gonna get them on the phone soon

Link to comment
Share on other sites

The phones work fine from Cisco switches with voice vlan defined, so i dont think that should be an issue.Only difference is that the phones are connceted to a Dell switch.

Interesting part is that if i specify the operative Vlan(via administrative settings) on the phone, it sets the vlan properly, gets its IP and works like a charm. When using only LLDP-med it seems to set it(based on the outcome of lldp outcome on remote-devices), but it wont work properly.

 

Im starting to believe this is a issue with the Dell switches, so im gonna get them on the phone soon

 

 

If the phones are running SCCP version, then they can not work with pbxnsip.

Link to comment
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

 Share

×
×
  • Create New...