Cisco Support Community
Showing results for 
Search instead for 
Did you mean: 

Welcome to Cisco Support Community. We would love to have your feedback.

For an introduction to the new site, click here. And see here for current known issues.

New Member

Force Interface shutdown on high error rate


We have a remote office site that is connectd to our

main campus thru 2 links. Primary is a Freespace

optical (laser) link that runs at 1Gbs, backing that

up is a 10Mbs link using Cisco wireless bridges.

At the remote site is a Cat6509 running CatOS, over

the links it connects to 2 separate Cat4507s running

IOS w/HSRP for redundency.

During very heavy snow the laser link will begin to

produce a high error rate (CRCs mostly) on both ends

of the link. At some point the rate gets high enough that remote site users loose VOIP and data conections.

The wireless link will run fine thru the snow but is of course slower. We are looking for a way to make an interface on either end of the gig/laser link

shutdown when the error rate gets too high. If we can make the interface on the near side 4507 shutdown we

can let HSRP fail the link over. If we could get the

port on the remote 6509 to shutdown we can configure

the near end to let Spantree reroute the data.

Having looked thru the docs, tech support help and

forums I cant seem to find a way to cause an

interface (or port in CatOS) to shutdown on a

selectable error rate.


New Member

Re: Force Interface shutdown on high error rate

Hi Thomas,

You can try using the "err-disable" command to disable a port, please go through the link, it has steps to recover from err-disable mode, might be useful to you.


New Member

Re: Force Interface shutdown on high error rate

Sai, do you know the quantative way to set up a interface threshhold on errors before cat OS disables the port?


CreatePlease to create content