0.0.0.0/0 BGP route being advertised

ttblum

Hello,

I notice I'm advertising routes that I don't want to. Status-->FRR-->BGP Routes from one of my routers is showing:

*> 0.0.0.0/0 ip.vpn.ip.nei.bor 0 0 <NeighborAS1> ?
*> 8.8.8.8/32 ip.vpn.nei.bo.or 0 <NeighborAS1> <NeighborAS2> ?

How can I prevent these routes from being advertised or accepted?

If I manually restart the FRR BGP service on a router, it's default route gets replaced with a remote gateway, and internet access goes down.

I've tried setting the acceptfilter option to ignore these routes but it has no effect.

                                    <acceptfilter>ON</acceptfilter>
                                    <routevalue>8.8.8.8/32</routevalue>
                                    <routetarget>bgp|ip.vpn.ip.nei.bor</routetarget>

ttblum

One of my routers is set to
Services-->FRR-->BGP-->BGP-->BGP Network Distribution-->Redistribute:

Connected Networks: Yes
FRR static routes: Yes
Kernel routable/static routes: Yes
OSPF routes: Yes

My other routers are set to:

Connected Networks: Yes, 
FRR static routes: No
Kernel routable/static routes: No
OSPF routes: No

Zawi

Use Prefix Lists

Services>FRR>BGP>Edit>Neighbors >> Peer Filtering>Prefix List Filter

For example:

neighbor 10.10.10.20 prefix-list test out

Prefix Lists

ip prefix-list test seq 9 deny 0.0.0.0/0
ip prefix-list test seq 10 permit 30.30.30.0/24
ip prefix-list test description

ttblum

This post is deleted!

ttblum

OK, would I have to set prefix lists for every neighbor, incoming or outgoing?

Is there way to have a prefix list apply to all neighbors?

Zawi

you need to apply it by neighbor.