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Adnan Khan
Participant

Error disable recovery cause

Hi,

 

Is error disable recovery global commands are best practices or it should not enable. below are some commands. If anyone can reply based on Cisco best practices perspective.

 

errdisable recovery cause udld
errdisable recovery cause bpduguard
errdisable recovery cause security-violation
errdisable recovery cause channel-misconfig
errdisable recovery cause pagp-flap
errdisable recovery cause dtp-flap
errdisable recovery cause link-flap
errdisable recovery cause sfp-config-mismatch
errdisable recovery cause l2ptguard
errdisable recovery cause psecure-violation
errdisable recovery cause port-mode-failure
errdisable recovery cause dhcp-rate-limit
errdisable recovery cause pppoe-ia-rate-limit
errdisable recovery cause mac-limit
errdisable recovery cause storm-control
errdisable recovery cause inline-power
errdisable recovery cause loopback

2 ACCEPTED SOLUTIONS

Accepted Solutions
Leo Laohoo
VIP Community Legend

Some auto-recover are OK but some, depending WHERE, it is applied can be "counter productive". 

Let me give you an example:  We have "errdisable recovery cause udld" turned on to our distro switches.  Our network have all OSPF, EIGRP and BGP running.  One evening, one of our distro switch link went into error-disabled because of UDLD.  Due to the auto-recovery enabled, the link went up after 60 seconds and this continued on for a few more times until the distro crashed because the routing protocols flooding in was non-stop.  

So before anyone think it is a good idea, wait until something bad happens. 

As far as I am concerned, links going into error-disable is a network admin's best friend.  Enabling auto-recovery, in my opinion, should only be in lab environment.  

View solution in original post

balaji.bandi
VIP Master

errdisable recovery cause udld
errdisable recovery cause bpduguard

I am more concerned above one, I would advise the admin to investigate if this goes down due to the reason, sometimes this may bring down the network due to recovery, depends how your Layer 2 network.

 

As i said good to have those features enabled where you have total control on the network and have some visibility, also worth send SYSLOG also for reference, how many times this link went down and recovered, so you will know the effect if they going down and recovering due to misconfiguration or malfunction of cables.

 

 

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View solution in original post

5 REPLIES 5
Leo Laohoo
VIP Community Legend

Some auto-recover are OK but some, depending WHERE, it is applied can be "counter productive". 

Let me give you an example:  We have "errdisable recovery cause udld" turned on to our distro switches.  Our network have all OSPF, EIGRP and BGP running.  One evening, one of our distro switch link went into error-disabled because of UDLD.  Due to the auto-recovery enabled, the link went up after 60 seconds and this continued on for a few more times until the distro crashed because the routing protocols flooding in was non-stop.  

So before anyone think it is a good idea, wait until something bad happens. 

As far as I am concerned, links going into error-disable is a network admin's best friend.  Enabling auto-recovery, in my opinion, should only be in lab environment.  

View solution in original post

Very logical and good point.

balaji.bandi
VIP Master

errdisable recovery cause udld
errdisable recovery cause bpduguard

I am more concerned above one, I would advise the admin to investigate if this goes down due to the reason, sometimes this may bring down the network due to recovery, depends how your Layer 2 network.

 

As i said good to have those features enabled where you have total control on the network and have some visibility, also worth send SYSLOG also for reference, how many times this link went down and recovered, so you will know the effect if they going down and recovering due to misconfiguration or malfunction of cables.

 

 

BB

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View solution in original post

Adnan Khan
Participant

Many thanks Leo and Balaji.

Hope the information helps you, if nothing more required we mark as resolved here ?

 

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