Yesterday, I found 3 FastEthernet port disabled on My Catalyst Express 500 (Port 20,23 & 24):
And this is the screen shoot from the alert page:
Result of running ’#show interface status’; 3 port status =’err-dissabled’
VLAN Configuration; Port 23-24 on Default VLAN, Port 20 on VLAN 3
Taken from Forum, port with ’ERR-DISABLED’ status can be resolved by running ’shutdown’ and ’no shutdown’ on that interface:
(config)#interface fastethernet 20
In order to turn on errdisable recovery and choose the errdisable conditions, issue this command: #errdisable recovery cause ?
Another command to troubleshoot:
- show interfaces status err-disabled-Shows which local ports are involved in the errdisabled state.
- show etherchannel summary-Shows the current status of the EtherChannel.
- show errdisable recovery-Shows the time period after which the interfaces are enabled for errdisable conditions.
- show errdisable detect-Shows the reason for the errdisable status
Because ’err-disable’ on my port caused by LOOPBACK, and when I see from ’#show errdisable recovery’ command the timer status is disabled, so I need to ’enable’ and give recovery timer for loopback.
(config)#errdisable recovery cause loopback
(Config)#errdisable recovery interval 400
Cause I am not Certified yet on Cisco, I don’t know is it a good decision or not give recovery timer for ’loopback’. I just won’t t to run ’shutdown’ & ’no shutdown’ if my port status ’err-dissable’ again. maybe u can give suggestion? I’ll apreciate it..
Update: Troubleshoot guide from Cisco:
also check and make sue that you do not have bpduguard enabled on the interfaces.
if you do, use the command of default-interface ( port number)
then go to interface and use the shut then no shut command.
OK, thanks Phillip…
it seems that you’ve enabled the telnet service on a Cisco CE500, which is supposed to be manageable only by a web interface, as of Cisco official documentation. Can you tell us how to do this, please?
Thanks in advance
@serg, as usual lah:
ip address 10.20.1.2 255.255.255.0
no ip route-cache
line con 0
line vty 0 4
privilege level 15
line vty 5 15
privilege level 15
I tried the above, but I could not telnet into my ce500.
Can you help me out please.