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timothy.case
Beginner

EEM event timer cron on tracking event + tracking uptime

I have two applets I am using to track connectivity and add or remove an ICMP ACL to an interface based on the tracking state. On the "up" applet I have two correlated events, one for tracking and the other for a cron timer. Essentially I want to add the ACL when tracking goes down and then remove it at a specified time once the tracking comes back up. It is working, but I would like to add some logic that tells the SLA_TEST_UP applet to only run the actions at the specified cron time IF the tracking object has been up for <x> seconds to avoid bringing up an unstable path.

ip sla 99

icmp-echo 8.8.8.8 source-ip 10.10.1.1

tag "ICMP Monitoring to Internet - 1"

frequency 10

ip sla schedule 99 life forever start-time now

ip sla 100

icmp-echo 8.8.4.4 source-ip 10.20.1.1

tag "ICMP Monitoring to Internet - 2"

frequency 10

ip sla schedule 100 life forever start-time now

track 5 ip sla 99

!

track 10 ip sla 100

!

track 42 list boolean and

object 5

object 10

            

event manager applet SLA_TEST

event syslog pattern "TRACKING-5-STATE: 42 .* Up->Down"    ! had to use this since it is a C3560X switch and EEM doesn't support tracking

action 1.1 cli command "enable"

action 1.2 cli command "configure terminal"

action 1.3 cli command "interface GigabitEthernet0/1.10"

action 1.4 cli command "ip access-group ICMP_DROP in"

action 1.5 cli command "end"

event manager applet SLA_TEST_UP

event tag 1.0 syslog pattern "TRACKING-5-STATE: 42 .* Down->Up"

event tag 2.0 timer cron cron-entry "24 16 * * *"

trigger occurs 1 delay 1

  correlate event 1.0 and event 2.0

  attribute tag 1.0 occurs 1

  attribute tag 2.0 occurs 1

action 1.1 cli command "enable"

action 2.1 cli command "configure terminal"

action 3.1 cli command "interface GigabitEthernet0/1.10"

action 4.1 cli command "no ip access-group ICMP_DROP in"

action 5.0 cli command "end"

Thanks!

Tim

1 REPLY 1
anishlekshman
Beginner

Dear Tim,

This is achevable by providing two default static routes to internet. the first ISP should be tracked by the IPSLA. So it will be only in the routing table and will process. During the first track is coming down, it will flush from the routing table and switch to secondary route. Corresponding ACL also will work.