Cisco 3550 Ethernet Port Up/Down

Unanswered Question

Does any one knows why the cisco 3550's ethernet ports keepts going up and down?

Here is a copy of the running log.

Syslog logging: enabled (0 messages dropped, 1 messages rate-limited, 0 flushes,

0 overruns, xml disabled, filtering disabled)

Console logging: level debugging, 2239 messages logged, xml disabled,

filtering disabled

Monitor logging: level debugging, 0 messages logged, xml disabled,

filtering disabled

Buffer logging: level debugging, 2239 messages logged, xml disabled,

filtering disabled

Exception Logging: size (4096 bytes)

Count and timestamp logging messages: disabled

File logging: disabled

Trap logging: level alerts, 815 message lines logged

Logging to 146.186.27.3, 0 message lines logged, xml disabled,

filtering disabled

Log Buffer (4096 bytes):

state to up

002200: Nov 9 06:42:41: %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEth

ernet0/27, changed state to down

002201: Nov 9 06:42:43: %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEth

ernet0/27, changed state to up

002202: Nov 9 06:54:16: %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEth

ernet0/29, changed state to down

002203: Nov 9 06:54:17: %LINK-3-UPDOWN: Interface FastEthernet0/29, changed sta

te to down

002204: Nov 9 06:54:20: %LINK-3-UPDOWN: Interface FastEthernet0/29, changed sta

te to up

002205: Nov 9 06:54:21: %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEth

ernet0/29, changed state to up

002206: Nov 9 06:54:33: %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEth

ernet0/29, changed state to down

002207: Nov 9 06:54:34: %LINK-3-UPDOWN: Interface FastEthernet0/29, changed sta

te to down

002208: Nov 9 06:54:37: %LINK-3-UPDOWN: Interface FastEthernet0/29, changed sta

te to up

002209: Nov 9 06:54:38: %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEth

ernet0/29, changed state to up

002210: Nov 9 06:54:41: %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEth

ernet0/25, changed state to down

002211: Nov 9 06:54:42: %LINK-3-UPDOWN: Interface FastEthernet0/25, changed sta

te to down

002212: Nov 9 06:54:45: %LINK-3-UPDOWN: Interface FastEthernet0/25, changed sta

te to up

002213: Nov 9 06:54:46: %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEth

ernet0/25, changed state to up

002214: Nov 9 06:54:58: %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEth

ernet0/25, changed state to down

002215: Nov 9 06:54:59: %LINK-3-UPDOWN: Interface FastEthernet0/25, changed sta

te to down

002216: Nov 9 06:55:01: %LINK-3-UPDOWN: Interface FastEthernet0/25, changed sta

te to up

002217: Nov 9 06:55:02: %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEth

ernet0/25, changed state to up

002218: Nov 9 07:32:34: %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEth

ernet0/33, changed state to down

002219: Nov 9 07:32:35: %LINK-3-UPDOWN: Interface FastEthernet0/33, changed sta

te to down

002220: Nov 9 07:32:39: %LINK-3-UPDOWN: Interface FastEthernet0/33, changed sta

te to up

002221: Nov 9 07:32:40: %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEth

ernet0/33, changed state to up

002222: Nov 9 07:32:53: %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEth

ernet0/33, changed state to down

002223: Nov 9 07:32:54: %LINK-3-UPDOWN: Interface FastEthernet0/33, changed sta

te to down

002224: Nov 9 07:32:56: %LINK-3-UPDOWN: Interface FastEthernet0/33, changed sta

te to up

002225: Nov 9 07:32:57: %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEth

ernet0/33, changed state to up

002226: Nov 9 08:07:48: %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEth

ernet0/31, changed state to down

002227: Nov 9 08:07:49: %LINK-3-UPDOWN: Interface FastEthernet0/31, changed sta

te to down

  • 1
  • 2
  • 3
  • 4
  • 5
Overall Rating: 3 (1 ratings)
Loading.
Giuseppe Larosa Mon, 11/09/2009 - 03:58

Hello Pedro,

have you tried to set speed and duplex?

we had a similar issue with C2950.

Hope to help

Giuseppe

Hello, here is a copy of int status. Even after running the command speed auto and duplex auto, I still see the difference in port configuration.

#sh int status

Port Name Status Vlan Duplex Speed Type

Fa0/1 Administrative-Net connected 401 a-full a-100 10/100BaseTX

Fa0/2 Administrative-Net notconnect 401 auto auto 10/100BaseTX

Fa0/3 Administrative-Net connected 401 a-full a-100 10/100BaseTX

Fa0/4 Administrative-Net connected 401 a-full a-100 10/100BaseTX

Fa0/5 Administrative-Net notconnect 401 auto auto 10/100BaseTX

Fa0/6 Administrative-Net notconnect 401 auto auto 10/100BaseTX

Fa0/7 Administrative-Net notconnect 401 auto auto 10/100BaseTX

Fa0/8 Administrative-Net notconnect 401 auto auto 10/100BaseTX

Fa0/9 Administrative-Net notconnect 401 auto auto 10/100BaseTX

Fa0/10 Administrative-Net notconnect 401 auto auto 10/100BaseTX

Fa0/11 Administrative-Net notconnect 401 auto auto 10/100BaseTX

Fa0/12 Administrative-Net notconnect 401 auto auto 10/100BaseTX

Fa0/13 Administrative-Net notconnect 401 auto auto 10/100BaseTX

Fa0/14 Administrative-Net notconnect 401 auto auto 10/100BaseTX

Fa0/15 Administrative-Net notconnect 401 auto auto 10/100BaseTX

Fa0/16 Administrative-Net notconnect 401 auto auto 10/100BaseTX

Fa0/17 Administrative-Net notconnect 401 auto auto 10/100BaseTX

Fa0/18 Administrative-Net notconnect 401 auto auto 10/100BaseTX

Fa0/19 Administrative-Net notconnect 401 auto auto 10/100BaseTX

Fa0/20 Administrative-Net notconnect 401 auto auto 10/100BaseTX

Fa0/21 Administrative-Net notconnect 401 auto auto 10/100BaseTX

Fa0/22 Administrative-Net notconnect 401 auto auto 10/100BaseTX

Fa0/23 Administrative-Net notconnect 401 auto auto 10/100BaseTX

Fa0/24 Administrative-Net notconnect 401 auto auto 10/100BaseTX

Fa0/25 Academic-Network connected 400 a-full a-100 10/100BaseTX

Fa0/26 Academic-Network connected 400 a-full a-100 10/100BaseTX

Fa0/27 Academic-Network connected 400 a-full a-100 10/100BaseTX

Fa0/28 Academic-Network notconnect 400 auto auto 10/100BaseTX

Fa0/29 Academic-Network connected 400 a-full a-100 10/100BaseTX

Fa0/30 Academic-Network connected 400 a-full a-100 10/100BaseTX

Fa0/31 Academic-Network connected 400 a-full a-100 10/100BaseTX

Fa0/32 Academic-Network connected 400 a-full a-100 10/100BaseTX

Fa0/33 Academic-Network connected 400 a-full a-100 10/100BaseTX

Fa0/34 Academic-Network connected 400 a-full a-100 10/100BaseTX

Fa0/35 Academic-Network connected 400 a-full a-100 10/100BaseTX

Fa0/36 Academic-Network connected 400 a-full a-100 10/100BaseTX

Fa0/37 Academic-Network notconnect 400 auto auto 10/100BaseTX

Fa0/38 Academic-Network notconnect 400 auto auto 10/100BaseTX

Fa0/39 Academic-Network notconnect 400 auto auto 10/100BaseTX

Fa0/40 Academic-Network notconnect 400 auto auto 10/100BaseTX

Fa0/41 Academic-Network notconnect 400 auto auto 10/100BaseTX

Fa0/42 Academic-Network notconnect 400 auto auto 10/100BaseTX

Fa0/43 Academic-Network notconnect 400 auto auto 10/100BaseTX

Fa0/44 Academic-Network notconnect 400 auto auto 10/100BaseTX

Leo Laohoo Mon, 11/09/2009 - 13:28

If you move this to a different switch do you get the same response? From my experience, the host OS could be unstable, keeps on rebooting, faulty cabling (patch and horizontal). Duplex mismatch is also another.

Actions

This Discussion