How to Apply QoS to an interface using EEM Scripting

[tyrone powell]

Good Afternoon

I'm trying to implement some EEM scripting. My objective is to apply a QoS policy to an interface based on the availability of a track statement.

When the track is down i want to apply the QoS policy, when the track is up I want the policy removed from the interface.

interface has no QoS applies during normal operation

interface FastEthernet0/0

ip address 10.10.10.3 255.255.255.0

duplex auto

speed auto

I have created relevant, class-map, policy-map, and tack statement and event manager applet as per below.

Router ios is 7200 Software (C7200-SPSERVICESK9-M), Version 12.4(22)T,

########### Event Manager version is as follows :

R2#show event manager version

Embedded Event Manager Version 3.00

Component Versions:

eem: (v300_throttle)1.1.267

eem-gold: (v300_throttle)1.0.8

eem-call-home: (v300_throttle)2.0.0R2#show event manager version
Embedded Event Manager Version 3.00
Component Versions:
eem: (v300_throttle)1.1.267
eem-gold: (v300_throttle)1.0.8
eem-call-home: (v300_throttle)2.0.0

event manager applet POLICE

event track 2 state down
action 1.0 cli command "enable"
action 1.5 cli command "conf t"
action 2.0 cli command "int fa0/1"
action 2.5 cli command "service-policy input POLICE"
action 3.0 cli command "end

###### track statement learned via eigrp  #####

track 2 ip route 2.2.2.2 255.255.255.255 reachability

##### shows track as being down and EEM applet being tied to the POLICE config

Track 2

  IP route 2.2.2.2 255.255.255.255 reachability

  Reachability is Down (no route)

    4 changes, last change 00:19:11

  First-hop interface is unknown

  Tracked by:

    EEM applet POLICE

Based on this information I would expect or hope that the event manager would kick in as the track statemnet is clearly down, however when i run the following command no output is returned

R2#show event manager policy active

"debug event manager all" returns nothing I can see that the policy is registered.

R2#show event manager policy registered

No.  Class     Type    Event Type          Trap  Time Registered           Name

1    applet    user    track               Off   Fri Oct 18 15:49:46 2013  POLICE track 2 state down

maxrun 20.000

action 1.0 cli command "enable"

action 1.5 cli command "conf t"

action 2.0 cli command "int fa0/0"

action 2.5 cli command "service-policy input POLICE"

action 3.0 cli command "end"

Is there an issue with my config? Is what I am trying to achieve possible (I assume it is)

Any help would be greatly appreciated

Thanks

[Joe Clarke · Accepted solution]

Well, the policy will run very quickly, so you may not catch it in policy active.  Look at show event manager history events to see if it ran.

Config-wise it looks okay.  If you have AAA command authorization configured, you will need to configure "event manager session cli username USER" where USER is a username authorized to run these CLI commands.

[tyrone powell]

Thanks Joseph

I can see the following which is a good sign.

No.  Job Id Proc Status   Time of Event            Event Type        Name

1    1      Actv success  Fri Oct18 15:35:56 2013  track             applet: POLICE

2    2      Actv success  Mon Oct21 13:17:28 2013  track             applet: POLICE

On a final note will the policy be automatically removed once the track statement is up or do I have to right a reverse policy to remove the QoS on the interface as below

event manager applet REMOVE-POLICE

event track 2 state up
action 1.0 cli command "enable"
action 1.5 cli command "conf t"
action 2.0 cli command "int fa0/1"
action 2.5 cli command "no service-policy input POLICE"
action 3.0 cli command "end

Cheers

[Joe Clarke]

That looks fine.