Hi Sim,
Port flapping can occur due to duplex, speed mismatch or some other
reason.
Check the duplex, speed of the port and the settings on the machine
connected to the port Fa0/18
Check if there is an STP loop i your network
When did this link flapping start?
Show port will show a lot of information and also check for any error on
this port.
27W5d is the switch uptime which is 27 weeks and 5 days.
Hope this helps.
Vamsi
Wipro Technologies
----- Original Message -----
From: "Sim, CT (Chee Tong)"
To:
Sent: Monday, September 09, 2002 10:32 AM
Subject: why my interface keep going up and down?? [7:52917]
> Hi... I was checking my syslog server and found that one of the switch's
> port keep changing states to up and down as shown below?? May I know what
> is the cause for this? I am sure we didn't plug out the cable at all. By
> the way, what is 27W5d??
>
>
> Sep 9 16:11:59 50.100.165.248 12051: 27w5d: %LINEPROTO-5-UPDOWN: Line
> protocol on Interfa
> ce FastEthernet0/18, changed state to down
> Sep 9 16:12:02 50.100.165.248 12052: 27w5d: %LINK-3-UPDOWN: Interface
> FastEthernet0/18, c
> hanged state to up
> Sep 9 16:12:02 50.100.165.248 12053: 27w5d: %LINEPROTO-5-UPDOWN: Line
> protocol on Interfa
> ce FastEthernet0/18, changed state to up
> Sep 9 16:12:20 50.100.165.248 12054: 27w5d: %LINK-3-UPDOWN: Interface
> FastEthernet0/18, c
> hanged state to down
> Sep 9 16:12:20 50.100.165.248 12055: 27w5d: %LINEPROTO-5-UPDOWN: Line
> protocol on Interfa
> ce FastEthernet0/18, changed state to down
> Sep 9 16:12:26 50.100.165.248 12056: 27w5d: %LINEPROTO-5-UPDOWN: Line
> protocol on Interfa
> ce FastEthernet0/18, changed state to up
> Sep 9 16:12:30 50.100.165.248 12057: 27w5d: %LINK-3-UPDOWN: Interface
> FastEthernet0/18, c
> hanged state to down
> Sep 9 16:12:30 50.100.165.248 12058: 27w5d: %LINEPROTO-5-UPDOWN: Line
> protocol on Interfa
> ce FastEthernet0/18, changed state to down
> Sep 9 16:12:34 50.100.165.248 12059: 27w5d: %LINK-3-UPDOWN: Interface
> FastEthernet0/18, c
> hanged state to up
> Sep 9 16:12:34 50.100.165.248 12060: 27w5d: %LINEPROTO-5-UPDOWN: Line
> protocol on Interfa
> ce FastEthernet0/18, changed state to up
>
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