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Posted on Jun 06, 2012
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Port getting flaps

Snmp protocol version V2 IOS version : cat4500-entservicesk9-mz.122-54.SG1.bin Link gets flaps even on 1ES on the optical media. Link has been tested working fine on an Ethernet tester but receives a port down and up on switch. Jun 1 16:45:07.643 IST: %LINK-3-UPDOWN: Interface GigabitEthernet1/46, changed state to down Jun 1 16:45:09.879 IST: %LINK-3-UPDOWN: Interface GigabitEthernet1/46, changed state to up Jun 1 16:45:10.879 IST: %LINEPROTO-5-UPDOWN: Line protocol on Interface GigabitEthernet1/46, changed state to up UWL-IN-DC-COR-SW-01#

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Martin Clarke

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  • Posted on Jun 16, 2012
Martin Clarke
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Sounds like some sort of keep-alive problem.
Try using
switch(config)# debug snmp packets
this will show you what is causing the line protocol to drop. you need to be connected to the console to see the output for this and turn it off when your done.
un debug all

good luck.

1 Related Answer

Anonymous

  • 4 Answers
  • Posted on Jun 02, 2009

SOURCE: ''!!! WARNING: The switch is not usable !!!''

Unfortunately the show stack isn't showing any results other than it is either a hardware or software fault. I am guessing it is a fault with the hardware as the show version in your first post states "interface Ethernet-controller 4 failed POST POST error status : general error occured".

Ethernet-controller 4 is one if the gigabit ports (poss fibre port), so if you have anything attached to those, disconnect and reboot the switch and see what happens. If that doesn't work, you could try reinstalling the IOS, but at a guess I would say its a hardware fault.

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