Prefix-lists

[andags]

I have this configuration

IP prefix-list ABC: 2 entries

Seq 5 deny 0.0.0.0/0

Seq10 permit 0.0.0.0/0 le 32

I understand second statement allows all networks and first one is used to deny default route.

But I am unable to understand what these 2 statements are trying to achieve.

Please help me in understanding the same

[Mark Malone]

Hi
Your understanding is correct block the default route but allow all other routes , but your missing where the prefix list is applied too , somewhere in config that prefix list is matched and applied to either an interface or a neighbor or a route-map and thats where it comes into effect , its telling that particular neighbor /interface etc , this is exactly what i want to see come into me , the prefix list is the filter

search the rest of the config for where its applied it should make more sense in the design

[andags]

Hi, Thanks for the clarification. Yes this is applied to the neighbor in BGP routing protocol in the outbound direction.

Does this mean I am not advertising my default route to my neighbor(neighbor here is a service provider) but allow to advertise all of my other routes

Is this right?

[Jon Marshall]

Yes, that is exactly what it means. 

Jon