problems with Cisco 7841 ip phones

[Raptorsnest]

Hello,

I currently have about 600 cisco 7841 in production, recently i had an entire floor of a building start rebooting and cutting off calls in progress.  I looked at the logs on one phone and got the following error message:

6989 NOT Feb 08 10:34:12.948094 dgetserver(15600)----------Wired DHCP6 Info of DOWND --------------------------

6990 NOT Feb 08 10:34:12.948363 dgetserver(15600)-dhcp6Info state:0x0 status:0x0 autocfg:0x1 mbit:0

6991 NOT Feb 08 10:34:12.948541 dgetserver(15600)-              ipv6::: prefixlen:0

6992 NOT Feb 08 10:34:12.948847 dgetserver(15600)-              dns1:::

6993 NOT Feb 08 10:34:12.948939 dgetserver(15600)-              dns2:::

6994 NOT Feb 08 10:34:12.949022 dgetserver(15600)-              router1:::

6995 NOT Feb 08 10:34:12.949104 dgetserver(15600)-              router2:::

6996 NOT Feb 08 10:34:12.949185 dgetserver(15600)-              tftp1:::

6997 NOT Feb 08 10:34:12.949265 dgetserver(15600)-              tftp2:::

6998 NOT Feb 08 10:34:12.949344 dgetserver(15600)-              alt-tftp1:::

6999 NOT Feb 08 10:34:12.949424 dgetserver(15600)-              alt-tftp2:::

7000 ERR Feb 08 10:34:12.949760 downd-SOCKET accept errno=4 "Interrupted system call"

7001 NOT Feb 08 10:34:12.950054 dgetserver(15600)-              domain:

7002 NOT Feb 08 10:34:12.950158 dgetserver(15600)-              tftpname:

7003 NOT Feb 08 10:34:12.950239 dgetserver(15600)-              ipmode:0

7004 NOT Feb 08 10:34:12.950344 dgetserver(15600)------------------------------------

7005 NOT Feb 08 10:34:12.950428 dgetserver(15600)-parseDhcpInfoIntoTftpList(): no valid load server

7006 ERR Feb 08 10:34:12.950514 dgetserver(15600)-Set tftpList from tftp_addr

7007 ERR Feb 08 10:34:12.950770 dgetserver(15600)-tftpList[0] = 10.10.XXX.XXX

7008 NOT Feb 08 10:34:12.950901 dgetserver(15600)-GETSRVR [ip=::] resolved.

7009 NOT Feb 08 10:34:12.990443 dgetserver(15600)-dgetserver.RESULT [_0_  [PASS] No error 

]

7010 ERR Feb 08 10:34:12.998590 downd-SOCKET accept errno=4 "Interrupted system call"

This appears to be when the phone drops the calls.  I also looked at the status messages and it showed it looking for an ipv6 address.  I am not currently running ipv6.  Any ideas would be helpful.  Thanks.

[Leo Laohoo]

recently i had an entire floor of a building start rebooting and cutting off calls in progress. 

The description does not sound like a phone issue but more leaning towards a switch/PoE issue.

[Raptorsnest]

I checked the POE setting on the switch stack and they all show normal draw for phones with no spikes or abnormal issues showing.  Checked against another switch stack with about same number of phones and the power being used was comparable.    

The phones don't loose power (aka they never go dark) it would appear that it is looking for a dhcpv6 address.  What would the statement "Wired DHCP6 Info of DOWND" refer to?

[Leo Laohoo]

I checked the POE setting on the switch stack and they all show normal draw for phones with no spikes or abnormal issues showing.  Checked against another switch stack with about same number of phones and the power being used was comparable.    

No, no, no.  Not the power draw.  What about the logs?  Was there anything in the logs at the time when the phones rebooted?

Did the switch (or switch stack) crash?