RIP Default GWY Filtering

[csacontract]

I wish to filter on outbound RIPv2 advertisements. I want a customer to receive a Default Gateway route, but do not wish to send them any of the other more specific routes in my table.

I'm already using distribute-lists with standard ACLs to only accept certain routes from customers. I haven't tried it yet, but would an ACL that is configured for 0.0.0.0 255.255.255.255 advertise just the default gateway, or would it match all routes and let them through?

Luke Plaizier

[Harold Ritter]

An ACL with 0.0.0.0 255.255.255.255 would indeed accept anything. You rather need 0.0.0.0 0.0.0.0, which will only match the default route. Note that the wildcard of 0.0.0.0 is the default and will therefore not show in the config. It should look something like this.

router rip

distribute-list 1 out

access-list 1 permit 0.0.0.0

access-list 1 deny any

Hope this helps,

[dennylester]

Hello,

I would be interested in knowing how you got your router to distribute the default route?

I can get mine to distribute the attached subnets but not the default gateway..

[attrgautam]

The best way if you have a default in the existing router is to originate the default using default-information originate