Hi, Oleg. Try to write two different filters for Your providers and apply them separatly in Exporting from each RIP to master table or even to separate table. May be You should simply drop nets of first provider coming from second and visa vesta ? P.S. I know You are doing load balancing , aren't You ? :-) -----Original Message----- From: owner-bird-users@atrey.karlin.mff.cuni.cz [mailto:owner-bird-users@atrey.karlin.mff.cuni.cz] On Behalf Of Loschyov Oleg Sent: Monday, May 24, 2004 1:49 PM To: bird-users@bird.network.cz Subject: routing filter problems Hello, I`m having some problems in making bird filters. I have 2 different channels to 2 different providers. Both of then distribute RIP. So I made the followng filter: ______________________________________________________ filter prov1_preferred { if net ~ 212.192.121.0/24 then { if from = 213.183.100.161 then { rip_metric = 10; accept; } else if from = 217.29.80.1 then accept; } else if net ~ 212.192.122.0/24 then { if from = 213.183.100.161 then { rip_metric = 10; accept; } else if from = 217.29.80.1 then accept; } else if net ~ 212.192.123.0/24 then { if from = 213.183.100.161 then { rip_metric = 10; accept; } else if from = 217.29.80.1 then accept; } else if net ~ 217.29.80.0/20 then { if from = 213.183.100.161 then { rip_metric = 10; accept; } else if from = 217.29.80.1 then accept; } else accept; } ______________________________________________________ 217.29.80.1 - first provider GW 213.183.100.161 - second provider GW eth0 - my eth to 1st provider eth2 - my eth to 2nd provider so I import this filter in protocol rip configuration: protocol rip eXoft_RIP { debug all; port 520; period 20; garbage time 200; interface "eth0" { metric 1; mode quiet; }; interface "eth1" { metric 2; mode broadcast; }; interface "eth2" { metric 1; mode quiet; }; honor neighbor; authentication none; import filter drop_default; import filter prov1_preferred; export filter { print "exporting"; accept; }; } and i make the following commands: service bird restart ip route flush proto bird #waiting for some time for RIP`s from providers ip r l |grep 212.192.12 #after that i see following: 212.192.125.0/25 via 213.183.100.161 dev eth2 proto bird 212.192.126.0/24 via 213.183.100.161 dev eth2 proto bird 212.192.123.0/24 via 213.183.100.161 dev eth2 proto bird 212.192.122.0/24 via 213.183.100.161 dev eth2 proto bird 212.192.121.0/24 via 213.183.100.161 dev eth2 proto bird 212.192.120.0/24 via 213.183.100.161 dev eth2 proto bird but i must be routed via eth0!!! where is the problem, help me please Loschyov Oleg icq:104545374