router_id or source neighbor in import/export filter for dynamic BGP peers
Mikhail Mayorov
mm at tagan.ru
Fri Sep 27 13:48:07 CEST 2024
Hi!
I use dynamic BGP peers in my RR. It's very simple and comfortable.
import/export filters are same for all dynamic neighbors. How to
determine a neighbor? Using what variables?
I will plan use filters likes that, but I can't find what I need send to
function "getneighbortype".....
function getneighbortype(ip neighbor) -> int
{
case neighbor {
1.1.1.1 : return 1; # router with big RIR
1.1.1.2 : return 3; # router with small RIR
else: return 0; # unknown router
}
}
filter fromclientrr {
int nt = getneighbortype(*router id / src neighbor*);
if nt = 0 then reject;
bgp_large_community.add((0,1,nt));
accept;
}
filter toclientrr {
int nt = getneighbortype(*router id / src neighbor*);
if net.len = 0 && nt ~ [0, 3] then accept;
if nt ~ [1] then accept;
reject;
}
--
Regards,
Mikhail Mayorov
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