[FROG] Default action associated w/ distribute-list

Nigel Kukard nkukard+frr at lbsd.net
Sun Oct 1 08:08:01 EDT 2017


Hi there Jim,

On 01/10/17 11:42, Jim Carroll wrote:
> I've scrutinized the docs
>  
> https://frrouting.org/user-guide/Filtering-RIP-Routes.html#Filtering-RIP-Routes
>  
> but cannot determine default announcement behavior.  
>  
> So I have a basic question about 'distribute-list prefix' applied outbound to an interface in RIP. Is the default action to permit or deny? 
>  
> For example, say we have
>  
>      router rip
>            distribute-list prefix mylist out eth0
>      ip prefix-list mylist seq 10 permit 10.0.0.0/8
>  
> What would the RIP process do with an announcement for 192.168.0.0/24 – would it default to deny (because it doesn’t match the permit list) or would it default to permit?
>

You're right, prefix lists default to deny. The above would result in
192.168.0.0/24 not being distributed.

-N
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