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Route damping on two routers, each receiving Internet table from 2 eBGP uplinks

Moh Mogh
Level 1
Level 1

‎07-13-2015 07:37 AM - edited ‎03-05-2019 01:52 AM

Hello everyone,

I would like to configure route damping on two routers, each receiving Internet routing table from two separate eBGP neighbors.

We are a Cloud service provider, so obviously route stability matters and that's why we were thinking of implementing route dampening.

I read some recommendations to raise the maximum suppress threshold to 50,000 and configure a suppress threshold value of at least 6,000.

So, what is your experince in such case and what would be your suggestions?

Any idea is really appreciated.

Thanks,
Mohammad

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Terence Payet
Level 1
Level 1

‎07-13-2015 10:23 AM

Hello Mohammad,

 

Its been quite a while since i've heard about route dampening. Nowadays you will just buy a device which will be able to cater your RIB needs, but anyway in your situation, i guess it will all depend on your hardware. What kind of routers are using eBGP peerings?

 

Regards,

Steve

Moh Mogh
Level 1
Level 1
In response to Terence Payet

‎07-13-2015 10:43 AM

Hi Terence,

Thank you for your comment.

 

Well, we have two 7609S and two Juniper MX480. (two separate DCs, and as mentioned each router having two eBGP peers)

We do currently have full table on all the routers, but sometimes we face issues related to route flapping.

Sorry for a blunt question, but I don't get what you mean by getting another device to cater the RIB. Are you talking about doing it in the SDN way with some kinda controller? Then I'm aware of some possible solutions, but would be happy to hear your suggestion too.

What I had in mind, was to take the approach of rfc7196, leave the default values unchanged except suppress threshold.

 

Thanks,

Mohammad

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Terence Payet
Level 1
Level 1
In response to Moh Mogh

‎07-13-2015 12:23 PM

Hi Mohammad,

 

Sorry for the late reply. i was driving home.

Yes i was thinking of SDN, but that is a seperate thing we can discuss later as plan B :).

For now, i read the rfc document. Very nice doc by the way. I think you are right, you should go towards RFC recommendations with a less destructive than the current damping, but still somewhat aggressive.

You can then play with the threshold level if need be.

 

HTH.

 

Please rate helpful post.

 

Regards,

 

Steve

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