Reset an Interface is in down state

[nsylaj]

I am trying to figure out a script or SLA configuration which applies the Shut/No Shut command if an interface goes down on a cisco switch, 3750

Can anyone guide me on this issue ?

Below is what I have for the SLA Config, however,  the interface is an access vlan and I do not have an IP as far as tracking by IP.   Is it possible to track by Status/Protocol state ?

track 1 ip sla 10 reachability
delay down 10 up 10
!
ip sla 10
icmp-echo ?????? source-interface Fastethernet 1/0/12
frequency 30
ip sla schedule 10 life forever start-time now
!
event manager applet Link-Down
event track 1 state down
action 1.0 syslog msg "Reply timed out; Link is down"
action 1.1 cli command "enable"
action 1.2 cli command "conf t"
action 1.3 cli command "interface Fastethernet 1/0/12"
action 1.4 cli command "shut"
action 1.5 cli command "end"
action 1.6 syslog msg "interface Fastethernet 1/0/12 shutdown"
event manager applet Link-Up
event track 1 state up
action 1.0 syslog msg "Ping received; Link is up"
action 1.1 cli command "enable"
action 1.2 cli command "conf t"
action 1.3 cli command "interface Fastethernet 1/0/12"
action 1.4 cli command "no shut"
action 1.5 cli command "end"
action 1.6 syslog msg "interface Fastethernet 1/0/12 up"

[cofee]

Hi,

Is it possible to track by Status/Protocol state ? Yes, it is. As long as the feature is supported with the code you are using.

Did you try the script and is it not working?

[nsylaj]

This script needs an IP address to track ping, however, ping is disabled and  I just want to track the state/protocol and reset. 

icmp-echo ?????? source-interface Fastethernet 1/0/12

[cofee · Accepted solution]

Hi,

Below is the configuration that can be used: 

track 1 interface GigabitEthernet1/0/14 line-protocol
!

event manager applet TEST authorization bypass
event track 1 state down
 action 1.0 cli command "enable"
 action 2.0 cli command "config terminal"
 action 3.0 cli command "int GigabitEthernet1/0/14 "
 action 4.0 cli command "shutdown"
!

But then how do you bring it back up? There has to be a condition set on the switch that would trigger the EEM to run the script to "no shut" the interface. You can use something in the syslog to trigger that. But I am not sure what exactly you are trying to solve with this script.

[nsylaj]

We have cell phone extenders that periodically go down.   Resetting the interface fixes the issue. 

I just wanted a shut/no shut process if the state is down.

[cofee · Accepted solution]

Then you would just need to add this line in the script I provided:

action 5.0 cli command "no shutdown"

[nsylaj]

I think this might work ?

track 1 interface  Fastethernet 1/0/12 line-protocol
!
event manager applet Link-Down
event track 1 state down
action 1.0 syslog msg "Interface went down"
action 1.1 cli command "enable"
action 1.2 cli command "conf t"
action 1.3 cli command "interface Fastethernet 1/0/12"
action 1.4 cli command "shut"
action 1.5 syslog msg "interface Fastethernet 1/0/12 shutdown"
action 1.6 cli command "no shut"
action 1.7 cli command "end"
action 1.8 syslog msg "interface Fastethernet 1/0/12 up"
!

[cofee · Accepted solution]

You can test both.