BGP failover

[tiholden]

I have two ISP's and want to have a primary and backup link. When the primary destination is not available I want to use the backup. I want to accomplish this by using the BGP weight statement (neighbor x.x.x.x weight ???). What is the default weight? Which weight number is prefered, the lower or higher number?

[Harold Ritter]

Timothy,

The default weight is 0. The maximum weight (the most preferred) is 32768.

Hope this helps,

[pkhatri]

Harold,

I was under the impression that the max weight was 65535 - has that changed ?

Paresh

[Harold Ritter]

Paresh,

You are correct. The maximum weight is indeed 65535. I just assumed that 32768 was the max since that is what we set for locally sourced prefixes.

Thanks and sorry for the confusion,

[tiholden]

So if the default is 0 I should be able to configure the preferred link to 100 and my network traffic will only route in that direction? And if for some reason that preferred link goes down then the other link with the default weight of 0 will then become preferred. Is this correct?

[pkhatri]

That is correct, assuming that both of your links are on the same router, since weight is a locally-significant parameter.

Hope that helps - pls rate the post if it does.

Paresh