Optimize ATM traffic after degradation

Answered Question
Oct 9th, 2007
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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

Correct Answer by paolo bevilacqua about 9 years 9 months ago

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!

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paolo bevilacqua Tue, 10/09/2007 - 00:58
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Excuse me, what means to tune a class map for OAM? You already have OAM.

What problem exactly you are trying to solve ?

grupporete Tue, 10/09/2007 - 04:43
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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


grupporete Wed, 10/10/2007 - 04:26
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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

Correct Answer
paolo bevilacqua Wed, 10/10/2007 - 14:25
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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!

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