11-09-2009 03:42 AM - edited 03-06-2019 08:30 AM
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
11-09-2009 03:58 AM
Hello Pedro,
have you tried to set speed and duplex?
we had a similar issue with C2950.
Hope to help
Giuseppe
11-09-2009 04:16 AM
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
11-09-2009 01:28 PM
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.
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