Hello Vyos community!
I’m trying to setup BGP multihoming with 2 ISPs, one local and one over GRE, but looks like there is an issue with my BGP annoucements.
Everytime I announce my testing /24 on both BGP sessions one of the is withdrawn for some reason.
This is my configuration right now:
(I will be AS100, ISP1 will be AS110 and ISP2 will be AS120)
policy {
prefix-list EXPORT-AS100 {
rule 10 {
action permit
description "My prefix"
prefix 123.0.0.0/24
}
}
route-map PREPEND3 {
rule 1 {
action permit
match {
ip {
address {
prefix-list EXPORT-AS100
}
}
}
set {
as-path-prepend "100 100 100"
}
}
}
}
protocols {
bgp 100 {
neighbor 10.0.1.1 {
nexthop-self
prefix-list {
export EXPORT-AS100
}
route-map {
export PREPEND3
}
remote-as 110
soft-reconfiguration {
inbound
}
update-source 10.0.1.2
}
neighbor 192.168.0.1 {
prefix-list {
export EXPORT-AS100
}
remote-as 120
soft-reconfiguration {
inbound
}
}
network 123.0.0.0/24 {
}
}
static {
route 123.0.0.0/24 {
blackhole {
}
}
}
}
If i check the advertised routes I get:
> show ip bgp neighbors 10.0.1.1 advertised-routes
BGP table version is 0, local router ID is 123.0.0.1
Status codes: s suppressed, d damped, h history, * valid, > best, i - internal,
r RIB-failure, S Stale, R Removed
Origin codes: i - IGP, e - EGP, ? - incomplete
Network Next Hop Metric LocPrf Weight Path
*> 123.0.0.0/24 10.0.1.2 1 100 32768 100 100 100 i
Total number of prefixes 1
and
> show ip bgp neighbors 192.168.0.1 advertised-routes
BGP table version is 0, local router ID is 123.0.0.1
Status codes: s suppressed, d damped, h history, * valid, > best, i - internal,
r RIB-failure, S Stale, R Removed
Origin codes: i - IGP, e - EGP, ? - incomplete
Network Next Hop Metric LocPrf Weight Path
*> 123.0.0.0/24 192.168.0.2 1 32768 i
Total number of prefixes 1
Everything looks good from my VyOS, but by checking at 10.0.1.1 I can see that VyOS is not annoucing my prefix to it for some reason:
> birdc show proto all vyos
BIRD 1.5.0 ready.
name proto table state since info
vyos BGP master up 13:57:14 Established
Preference: 100
Input filter: ACCEPT
Output filter: ACCEPT
Routes: 0 imported, 725065 exported, 0 preferred
Route change stats: received rejected filtered ignored accepted
Import updates: 0 0 0 0 0
Import withdraws: 1 0 --- 1 0
Export updates: 731324 0 0 --- 731324
Export withdraws: 414 --- --- --- 414
BGP state: Established
Neighbor address: 10.0.1.2
Neighbor AS: 100
Neighbor ID: 123.0.0.1
Neighbor caps: refresh AS4
Session: internal AS4
Source address: 10.0.1.1
Hold timer: 112/180
Keepalive timer: 25/60
Did I miss something in my setup to make vyos announce my prefix to both neighbors?
Any ideias would be really helpful as I’m new to vyos and BGP in general.