09-22-2010 02:16 PM - edited 03-06-2019 01:08 PM
Hi2All
I had posted this on WAN forum,
Switch-----------------------Wireless_outdoor_AP
I got issue on the switchport connecting to Wireless_outdoor_AP, all of a sudden the port becomes error_disable.
I shutdown the port and make the port default then it starts working again. Again after couple of days it goes off.
Cisco recommended to configure error-disable recovery and error-disable time but it doesnt help.
Can you expert can recommend solution to overcome this issue.
Switch : 2960 48 ports
Wireless_outdoor_AP : Wilan
show errdisable detect
ErrDisable Reason Detection status
----------------- ----------------
udld Enabled
bpduguard Enabled
security-violatio Enabled
channel-misconfig Enabled
psecure-violation Enabled
unicast-flood Enabled
vmps Enabled
loopback Enabled
unicast-flood Enabled
pagp-flap Enabled
dtp-flap Enabled
link-flap Enabled
sfp-config-mismat Enabled
gbic-invalid Enabled
dhcp-rate-limit Enabled
storm-control Enabled
arp-inspection Enabled
community-limit Enabled
invalid-policy Enabled
OOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOO
sh interfaces status err-disabled
Port Name Status Reason
Fa0/38 err-disabled link-flap
Fa0/44 err-disabled loopback
Best Wishes
Anthony
09-22-2010 03:34 PM
The question is "WHY" is your port going into error disable.
If it's a link-flap then there is a chance that you have a faulty cable. The good part of this all is that you have a 2960 with in-build TDR (crude but good enough).
Use the command "test cable tdr int
NOTE: If you are running IOS earlier than 12.2(46) this command is DISRUPTIVE. IF you have IOS version newer to this, then it's OK.
Good result is "OK" or "Normal". Anything else is bad. Also, because you have a 10/100BaseTx, don't be alarm if the result is for the first two pairs. This is normal. If you have gig ports then you will have a result of all four pairs.
Hope this helps.
09-22-2010 05:36 PM
Hi,
It would be better to check the speed/duplex settin as well.
Rgds,
Souvik
09-23-2010 12:04 AM
Hi2All
I got this as output
Interface Speed Local pair Pair length Remote pair Pair status
--------- ----- ---------- ------------------ ----------- --------------------
Fa0/45 100M Pair A 10 +/- 15 meters Pair A Normal
Pair B 10 +/- 15 meters Pair B Normal
Pair C N/A Pair C Not Supported
Pair D N/A Pair D Not Supported
How do I overcome this issue.
Best Wishes
09-23-2010 12:13 AM
Hi Antony,
This is connecting to an outside Wireless AP, is there any chance that the cable that is feeding the AP is loose outside and is flapping when the wind blows? There may be a microbreak in the cable that only presents when the cable is in certain positions (i.e. when the wind is blowing hard and the cable is flapping)
Check to ensure it's properly secured.
Also, have you tried the AP connected to a different port on the switch?
Nick
09-23-2010 01:10 AM
Hi2All
Nick what you mentioned is very much possible. Can we bypass this for outdoor Wireless links.
I have checked on 5 different ports but its the same, even changed the switch with new IOS ; still the same
Best Wishes
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