Hello,
I have issues trying to setup this :
ISP A ISP B
| |
Router A Router B
Main site ------- Backup site
1.1.1.0/25 1.1.1.128/25
I'd like that connections to the main site flow through ISP A, to the backup
site flow through ISP B, with backup through the other ISP if one fails.
So I set up openBGPd like this :
Router A :
AS 65001
network 1.1.1.0/25
network 1.1.1.128/25 set prepend-self 5
neighbor "ISP A" {
remote-as 65002
}
neighbor "router B" {
remote-as 65001
}
allow from any
Router B :
AS 65001
network 1.1.1.0/25
network 1.1.1.128/25 set prepend-self 5
neighbor "ISP B" {
remote-as 65003
}
neighbor "router A" {
remote-as 65001
}
allow from any
I'm still during the test phase, so to simulate ISPs routers I've put some
other openBSD boxes.
Their setup :
Router ISP A :
AS 65002
neighbor "Router A" {
remote-as 65001
announce default-route
}
allow from any
Router ISP B :
AS 65003
neighbor "Router B" {
remote-as 65001
announce default-route
}
allow from any
For now, I only have ISP A and router A set up.
My problem : the "set prepend-self 5" on router A prevents the network
1.1.1.128/25 from appearing into router ISP A RIB.
If I remove the option, everything is fine.
Bgpctl sh rib on router A :
Flags destination gateway lpref med aspath
origin
*> 0.0.0.0/0 "router ISP A" 100 0 65002
i
AI*> 1.1.1.0/25 0.0.0.0 100 0
i
AI*> 1.1.1.128/25 0.0.0.0 100 0 65001 65001 65001 65001
65001 i
Bgpctl sh rib on router ISP A :
Flags destination gateway lpref med aspath
origin
*> 1.1.1.0/25 "router A" 100 0 65001
i
Could someone tell me where is my mistake ?
Thank you very much.
--
Cordialement,
Pierre BARDOU
