EEM on port error-disable due to UDLD

[Leo Laohoo]

I would like to ask from the EEM community for some assistance in regards to crafting an EEM script for an ME-3800X.  We have one or two appliances whereby the only uplink (TenGigabitEthernet0/1 and/or TenGigabitEthernet0/2) goes into error-disable and caused by UDLD.  What I am looking for is a script to do the following: 

1.  If the ports TenGigabitEthernet0/1 and/or TenGigabitEthernet0/2 goes into error-disable caused by UDLD or link-flap then disable the port, wait for 5 seconds, enable the port; 

2.  Wait for 15 seconds and send an email.  

I only want this EEM to work on the TenGigabitEthernet interfaces and I do not want the EEM script to do this on the access ports.  

Error-disable recovery is a global option and there's no option to limit on a per-interface level.  

Thank you in advance. 

[Joe Clarke]

What syslog message is generated when the ports go into err-disable.

[Leo Laohoo]

Thanks for responding, Joe. 

We were not able to take down the error messages but I believe they error messages could be:

%UDLD-4-UDLD_PORT_DISABLED: UDLD disabled interface Te0/2, unidirectional link detected
%PM-4-ERR_DISABLE: udld error detected on Te0/2, putting Te0/2 in err-disable state

Could an EEM script be created when an error message or an event of "unidirectional link detected" occurs, do the following: 

1.  In privilege mode, issue the command "udld reset".

2.  Wait for 30 seconds and then send an email. 

Thanks for your assistance and support, Joe.

[Joe Clarke · Accepted solution]

For this, an applet like the following should work:

event manager applet udld-recover

 event syslog pattern "Te0/[12], unidirectional link detected" maxrun 50

 action 1.0 regexp "(Te0/[12])," $_syslog_msg match intf

 action 2.0 cli command "enable"

 action 3.0 cli command "udld reset"

 action 4.0 wait 30

 action 5.0 mail from "user@example.com" to "user@example.com" subject "UDLD Reset" server "10.1.1.1" body "UDLD has been reset after $intf when err-disable"

[Leo Laohoo]

Thanks, Joe.  

I'm going to check this out.