DHCP renew IP address after reboot IP Phone

[Jorge Alberto Largaespada Gonzalez]

Hello everyone,

i have some trouble with 4 cisco ip phone 7821 who renew ip address after reboot, paste the log of the phone next:

4667 NOT 14:58:14.901708 DHCP-dhcpWriteResolv(): /etc/resolv.conf points to ../tmp/.resolv.conf.dhcp, need to change
4668 NOT 14:58:14.901853 DHCP-dhcpWriteResolv(): cannot unlink /etc/resolv.conf, Read-only file system
4669 NOT 14:58:14.901901 DHCP-dhcpWriteResolv(): creat symbol link error File exists
4670 NOT 14:58:14.901940 DHCP-dhcpSendReq(): Sending Discover...
4671 INF 14:58:14.918531 dnsmasq[7920]: started, version 2.46 cachesize 150
4672 INF 14:58:14.918878 dnsmasq[7920]: compile time options: IPv6 GNU-getopt no-DBus no-I18N TFTP
4673 INF 14:58:14.920445 dnsmasq[7920]: reading /etc/resolv.conf
4674 WRN 14:58:14.920800 dnsmasq[7920]: ignoring nameserver 127.0.0.1 - local interface
4675 INF 14:58:14.921409 dnsmasq[7920]: read /etc/hosts - 2 addresses
4676 NOT 14:58:16.902937 DHCP-dhcpRcvPkt(): Sending Request...
4677 NOT 14:58:16.903545 DHCP-dhcpRcvPkt(): response unrecognized
4678 NOT 14:58:16.908399 DHCP-dhcpRcvPkt(): ACK received
4679 NOT 14:58:16.908531 DHCP-dhcpRcvPkt(): DHCP Succeeded
4680 NOT 14:58:16.908577 DHCP-dhcpRcvPkt(): new assigned IP addr: 0x92463e0a, configuredipaddr: 0x0

i think that the the phone are damage, i am correct?

[Marcelo Morais]

Hi Jorge Alberto,

 if my understanding is correct, you have more than four 7821, but only these four are having problems, am I correct?

 Did you try a Factory Reset (check the link Perform a Factory Reset)?

Hope this helps.

[Jorge Alberto Largaespada Gonzalez]

yes i tried factory reset but the same result also i changed the firmware the problem solved for about 1 hour. after the problem continue

[Marcelo Morais]

Hi Jorge Alberto,

 ok, and you have others 7821 that didn't have the same issue?

Regards.

[Jorge Alberto Largaespada Gonzalez]

yes, around 200 more phones only 4 phone have the issues

[Marcelo Morais]

Ok.

 what happened if:

1) you configure these phones with DHCP disable and after a couple of hours change it to DHCP enable?

2) you configure the following:

In CUCM Administration > Device > Device Settings > Common Device Configuration:
Select the 'Common Device Configuration'
IP Addressing Mode: IPv4 Only
and associate it to these 7821

Regards.

[Jorge Alberto Largaespada Gonzalez]

thanks Marcelo, i will try.