IWAN - cache overflow issue on branch routers

[hugo.girard]

Hi,

I have deployed IWAN solution with cisco 892FSP Branch routers (IOS version is 15.7(3)M1).

I get the following error message :

May  8 2018 08:00:00.071 CEST: %MMA-3-CACHE_OVERFLOW: The number of flows has exceeded 95% of the configured size, monitor MON-Egress-aggregate-0-0-5, please increase cache size

I agree with the increase of the cache size. However I don't know how to do that and what is the best practice value for this kind of routers.

Do you have any ideas ?

Many thanks in advance.

[Georg Pauwen · Accepted solution]

Hello, 

I think it is set under the domain:

domain iwan

...

....

.....
 advanced
  monitor-cache-percent 80

[hugo.girard]

Hi,

It works ! ;-)

Thanks a lot.

[Beau Clark]

I am getting this error on one of my HUB routers. When I go to enter the command:

monitor-cache-percent ? ! it tells me

<1-100> cache usage (%), border instance will AUTOMATICALLY go through SHUT/NO SHUT any ACTIVE traffic on this border will be affected

May I ask:

1. Is this going to reset all ACTIVE traffic going through this router?

2. Is this reducing the threshold for what is being monitored? I thought I would want to increase a queue size...

Thank you for any insight you might be able to provide.