Hi,
I am facing a difficulty we have cisco 2960S switch. The IP telephone is not working, it gets connected and then disconnects.
port connected is Gi1/0/43. If we connect direct to the switch then it works. I already updated the firmware of the switch but no effect.
Can you guide in which direction I can further troubleshoot. and also what should I check for physical connection as well?
SW#show log
Syslog logging: enabled (0 messages dropped, 0 messages rate-limited, 0 flushes, 0 overruns, xml disabled, filtering disabled)
No Active Message Discriminator.
No Inactive Message Discriminator.
Console logging: level debugging, 210 messages logged, xml disabled,
filtering disabled
Monitor logging: level debugging, 0 messages logged, xml disabled,
filtering disabled
Buffer logging: level debugging, 210 messages logged, xml disabled,
filtering disabled
Exception Logging: size (4096 bytes)
Count and timestamp logging messages: disabled
File logging: disabled
Persistent logging: disabled
No active filter modules.
Trap logging: level informational, 202 message lines logged
Logging Source-Interface: VRF Name:
Log Buffer (4096 bytes):
ol on Interface GigabitEthernet1/0/43, changed state to down
000178: Mar 24 12:05:35.229 CET: %LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet1/0/43, changed state to up
000179: Mar 24 12:05:45.909 CET: %LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet1/0/43, changed state to down
000180: Mar 24 12:05:47.912 CET: %LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet1/0/43, changed state to up
000181: Mar 24 12:05:56.515 CET: %LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet1/0/43, changed state to down
000182: Mar 24 12:05:58.523 CET: %LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet1/0/43, changed state to up
000183: Mar 24 12:06:14.499 CET: %LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet1/0/43, changed state to down
000184: Mar 24 12:06:16.502 CET: %LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet1/0/43, changed state to up
000185: Mar 24 12:06:25.016 CET: %LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet1/0/43, changed state to down
000186: Mar 24 12:06:27.019 CET: %LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet1/0/43, changed state to up
000187: Mar 24 12:06:28.618 CET: %LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet1/0/43, changed state to down
000188: Mar 24 12:06:30.621 CET: %LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet1/0/43, changed state to up
000189: Mar 24 12:06:45.616 CET: %LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet1/0/43, changed state to down
000190: Mar 24 12:06:47.619 CET: %LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet1/0/43, changed state to up
000191: Mar 24 12:07:30.056 CET: %LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet1/0/43, changed state to down
000192: Mar 24 12:07:31.057 CET: %LINK-3-UPDOWN: Interface GigabitEthernet1/0/43, changed state to down
000193: Mar 24 12:07:33.097 CET: %LINK-3-UPDOWN: Interface GigabitEthernet1/0/43, changed state to up
000194: Mar 24 12:07:34.098 CET: %LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet1/0/43, changed state to up
000195: Mar 24 12:07:53.775 CET: %LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet1/0/43, changed state to down
000196: Mar 24 12:07:58.620 CET: %LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet1/0/43, changed state to up
000197: Mar 24 12:08:11.848 CET: %LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet1/0/43, changed state to down
000198: Mar 24 12:08:13.851 CET: %LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet1/0/43, changed state to up
000199: Mar 24 12:08:37.293 CET: %LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet1/0/43, changed state to down
000200: Mar 24 12:08:39.295 CET: %LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet1/0/43, changed state to up
000201: Mar 24 12:09:04.278 CET: %LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet1/0/43, changed state to down
000202: Mar 24 12:09:06.281 CET: %LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet1/0/43, changed state to up
000203: Mar 24 12:09:17.444 CET: %LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet1/0/43, changed state to down
000204: Mar 24 12:09:19.446 CET: %LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet1/0/43, changed state to up
000205: Mar 24 12:11:08.186 CET: %LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet1/0/43, changed state to down
000206: Mar 24 12:11:09.193 CET: %LINK-3-UPDOWN: Interface GigabitEthernet1/0/43, changed state to down
000207: Mar 24 12:11:12.234 CET: %LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet1/0/43, changed state to up
000208: Mar 24 12:11:14.232 CET: %LINK-3-UPDOWN: Interface GigabitEthernet1/0/43, changed state to up
000209: Mar 24 12:11:19.202 CET: %LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet1/0/43, changed state to down
000210: Mar 24 12:11:21.205 CET: %LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet1/0/43, changed state to up
SW-LU-Berl.Platz#sh int status
Port Name Status Vlan Duplex Speed Type
Gi1/0/1 connected 1 a-full a-100 10/100/1000BaseTX
Gi1/0/2 connected 1 a-full a-100 10/100/1000BaseTX
Gi1/0/43 connected 1 full a-100 10/100/1000BaseTX
