Constant phone reboots 1

[LeeMason]

We have started to get occurances of phones that start to reboot and then just keep rebooting. They go through there complete reboot cycle and get the config file from the correct config server, get to the point where they say "Please wait..." which should be followed by a logon but then reboot again. They keep doing this. I have four phones (out of about 130) which have now gone "faulty" with this problem. If the phone is replaced with a new one it works fine!

All phones ahd 4422's (R1B).

They appear to boot into our voice vlan as expected before rebooting again.

Lee.


Lee Mason
Optimal Projects Ltd

 

[mundus]

Check the V-lan settings in the ip phone but do this at reboot, from Alex:

7.16 Virtual LAN (VLAN)
The built in Ethernet switch can handle virtual LAN identities and priorities for the LAN port, for the telephone port and for the PC port.

The following possibilities to assign VLAN identities exist:

From DHCP in option 43 (only the phone port, but not the PC port). A list of maximum three VLAN identities can be handled, see Figure 7-37 .
From the configuration file (both the phone- and the PC port).
From a menu where it can be manually set (both the phone- and the PC port).
It is possible to change the different VLAN options from the menu in the boot sequence. The following menu is shown:




Enter the administrator mode, go down in the Network list until the line VLAN for Phone Port occurs.

No VLAN . VLAN shall not be used, but if a VLAN identity is read from the configuration file, VLAN will be used.
Auto. This is the default value when the telephone is delivered from the factory. If the telephone receives a VLAN identity list from DHCP (in option 43) or if there is a VLAN identity defined in the configuration file it will be used. The VLAN identity received from DHCP has priority over the configuration file. For more information, see 7.16.1 Automatic VLAN detection with DHCP and see 7.16.2 Assigning the VLAN identity via the configuration file .
Manually . The manually entered VLAN identity will be used, see 7.16.3 Manual setting of the VLAN identity . But if a VLAN identity is read from the configuration file the manually entered VLAN identity will be overwritten.
Even when VLAN is not used this parameter can have the default value Auto .

Concerning the priority of the frames: For outgoing frames the following priorities will be set at level 2 for each frame by default, when VLAN is used:

For frames originating in the telephone the default value will be 6, meaning voice traffic with less than 10 ms latency.
For frames originating in the PC the default value is 0, meaning best effort.
The priorities can be changed via the configuration file, see description for CONFIGURATION FILE FOR DBC 42X .

 

[LeeMason]

VLAN setting is Auto and we are setting the VLAN ID from DHCP option 43. This works fine and we have about 130 phones in all. We have tried using the config file to set VLAN for phone and PC port but can't get this to work! Phones get the correct VLAN and IP address but cannot register with the Primary Gatekeeper (I think).

Lee Mason
Optimal Projects Ltd

http://www.opl.co.uk

http://www.backupsanywhere.com

 

[parnum]

Hi - do an ethereal trace to see what is happening. if phone is in correct voice VLAN after rebooting sounds like a QOS problem? check for lost packets?

best parnum

 

[LeeMason]

Have at long last done a trace on a phone that has gone faulty. I can see the following:

1. Boots up into the default data VLAN.
2. Loads the config file from the config server correctly.
3. Reboots into the voice VLAN correctly.
4. Loads the config file again from the config server.
5. Sends an SNMP TRAPV1 packet to the config server.
6. Reboots and goes back to step 3 and carries on doing this.

I would have expected the phone to send a packet to the primary gatekeeper at this stage to try to register.

The above is a very much abridged version of the bootup process but hopefully you get the idea...


Lee Mason
Optimal Projects Ltd

http://www.opl.co.uk

http://www.backupsanywhere.com