Solved: Optimize ATM traffic after degradation

grupporete · ‎10-09-2007

Dear experts

We work in a Company with over 800 Cisco devices

Using ATM with varios speeds ( from 4 Mb/s to 52 Mb/s )

On the Backbone ( redundated ) links We usually find a lot of CRC ( aalsnap5 enc. ) degradation.

Anyone has got a idea to shut the pirmary link upon a high degradation :

E.g

Can we tune a Map class or set something in the OAM retry ?

Actual on a bakbone ATM ( 52 Mb/s )

*****************************

interface ATM9/0/0

description Link verso TO0NI04P 6/8

no ip address

ip route-cache flow

load-interval 30

atm sonet stm-1

no atm ilmi-keepalive

!

interface ATM9/0/0.50 point-to-point

description pvc verso RM0TU01P 2/12 --- WRM-TZW-02-ABR

bandwidth 52800

ip address 10.x.x.x 255.255.255.252

ip mtu 1500

pvc 0/50

vbr-nrt 52800 48000 33

oam-pvc manage

oam retry 3 3 3

encapsulation aal5snap

Any suggestion is appreciated.

Alberto

paolo bevilacqua · ‎10-10-2007

Using EEM, your trigger would be reaching of a certain interface error counter value, and action a configuration change. You have to familiarize yourself with the EEM programming model and this can't be easy at first.

See: http://cisco.com/en/US/products/sw/iosswrel/ps5207/products_feature_guide09186a008041231a.html

And yes, I'm Italian.

Hope this helps, please rate post if it does!

View solution in original post

paolo bevilacqua · ‎10-09-2007

Excuse me, what means to tune a class map for OAM? You already have OAM.

What problem exactly you are trying to solve ?

grupporete · ‎10-09-2007

Hello

we are trying to implement a command ( don't know which command are yet ) that check if my link ( in this case an ATM ) has got an high degrade.

Then try to switch to the twin link

Hope this help

paolo bevilacqua · ‎10-09-2007

You can use the EEM for this:

http://cisco.com/en/US/products/ps6815/products_white_paper0900aecd803a4dad.shtml

However I would focus on getting the Sp providing a reliable circuit in first place.

grupporete · ‎10-09-2007

Dear Bevilacqua

parla italiano ?

grupporete · ‎10-10-2007

Hello Beviliqua

this document is very intersting. But I cannot see a clear propose to make an action after a Link is full of CRC errors.

Regards

paolo bevilacqua · ‎10-10-2007

Using EEM, your trigger would be reaching of a certain interface error counter value, and action a configuration change. You have to familiarize yourself with the EEM programming model and this can't be easy at first.

See: http://cisco.com/en/US/products/sw/iosswrel/ps5207/products_feature_guide09186a008041231a.html

And yes, I'm Italian.

Hope this helps, please rate post if it does!