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Cat 4500 IOS-XE 3.6.6E can ports auto recover from suspend state?

Lately we have been having problems with a port that is part of a port-channel that puts itself in suspend.

now that part isn't really the problem as we know the reason why it does that, the problem is that we have to do some extra work when the issues that put the port in suspend are over and the port rejoins the port channel.

so my question is, can a port auto recover when it's put itself in suspend state, or does the port need to be manually be put in shut/no shut?

1 ACCEPTED SOLUTION

Accepted Solutions
VIP Purple

Re: Cat 4500 IOS-XE 3.6.6E can ports auto recover from suspend state?

Hi

check your errdisable recovery you can set it to recover itself using that like below options on my switch

 

(config)#errdisable ?
  detect        Error disable detection
  flap-setting  Error disable flap detection setting
  recovery      Error disable recovery

 

#sh errdisable recovery
Recovery Status                       Timer Status
---------------                       ------------
udld                                    Disabled
bpduguard                               Disabled
security-violation                      Disabled
channel-misconfig                       Disabled
vmps                                    Disabled
pagp-flap                               Disabled
dtp-flap                                Disabled
link-flap                               Disabled
l2ptguard                               Disabled
psecure-violation                       Disabled
gbic-invalid                            Disabled
dhcp-rate-limit                         Disabled
mac-limit                               Disabled
unicast-flood                           Disabled
storm-control                           Disabled
arp-inspection                          Disabled
loopback                                Disabled
link-monitor-failure                    Disabled
oam-remote-failure critical-event       Disabled
oam-remote-failure dying-gasp           Disabled
oam-remote-failure link-fault           Disabled
dot1ad-incomp-etype                     Not supported
dot1ad-incomp-tunnel                    Not supported
mvrp                                    Not supported
transceiver-incomp                      Not supported
packet-buffer                           Not supported
inline-power                            Not supported

5 REPLIES
VIP Purple

Re: Cat 4500 IOS-XE 3.6.6E can ports auto recover from suspend state?

Hi

check your errdisable recovery you can set it to recover itself using that like below options on my switch

 

(config)#errdisable ?
  detect        Error disable detection
  flap-setting  Error disable flap detection setting
  recovery      Error disable recovery

 

#sh errdisable recovery
Recovery Status                       Timer Status
---------------                       ------------
udld                                    Disabled
bpduguard                               Disabled
security-violation                      Disabled
channel-misconfig                       Disabled
vmps                                    Disabled
pagp-flap                               Disabled
dtp-flap                                Disabled
link-flap                               Disabled
l2ptguard                               Disabled
psecure-violation                       Disabled
gbic-invalid                            Disabled
dhcp-rate-limit                         Disabled
mac-limit                               Disabled
unicast-flood                           Disabled
storm-control                           Disabled
arp-inspection                          Disabled
loopback                                Disabled
link-monitor-failure                    Disabled
oam-remote-failure critical-event       Disabled
oam-remote-failure dying-gasp           Disabled
oam-remote-failure link-fault           Disabled
dot1ad-incomp-etype                     Not supported
dot1ad-incomp-tunnel                    Not supported
mvrp                                    Not supported
transceiver-incomp                      Not supported
packet-buffer                           Not supported
inline-power                            Not supported

New Member

Re: Cat 4500 IOS-XE 3.6.6E can ports auto recover from suspend state?

awesome, I'll do some research into this!

But this I can work with.

 

Thx for the feedback!

VIP Purple

Re: Cat 4500 IOS-XE 3.6.6E can ports auto recover from suspend state?

Hall of Fame Super Gold

Re: Cat 4500 IOS-XE 3.6.6E can ports auto recover from suspend state?

I have seen through my own eyes how someone enabled UDLD and also auto-recovery of this kind of fault on a 6807 running BGP. The link went into UDLD error-disabled state a few times and the chassis crashed.

Use error-disable recovery with caution and care. Exercise common sense is mandatory.

 

NOTE:  

Error-disable state is not an enemy but your friend.  This tells a network admin that something is definitely wrong.  If the link(s) go into this state, one must investigate and fix it.  There is no reason why link(s) would go into error-disable for no apparent reason.  

New Member

Re: Cat 4500 IOS-XE 3.6.6E can ports auto recover from suspend state?

Update:

 

A port can and will recover from an suspend state without human intervention.

The problem was our carrier damaged a cable that was part of a port channel.

As soon as they fixed it, it pulled itself out of suspend, this was not due to UDLD, but due to LACP.

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