With a route-map in place to allow a given prefix, that prefix is filtered out on export.
With the route map in place, no routes are advertised:
brooks@border# run show ip bgp neighbors 10.10.10.1 advertised-routes [edit]
But if the route-map is deleted:
brooks@border# delete protocols bgp 397143 neighbor 10.10.10.1 address-family ipv4-unicast route-map [edit] brooks@border# commit [edit]
Everything works as expected:
brooks@border# run show ip bgp neighbors 10.10.10.1 advertised-routes
BGP table version is 1, local router ID is 10.0.100.1, vrf id 0
Status codes: s suppressed, d damped, h history, * valid, > best, = multipath,
i internal, r RIB-failure, S Stale, R Removed
Nexthop codes: @NNN nexthop's vrf id, < announce-nh-self
Origin codes: i - IGP, e - EGP, ? - incomplete
Network Next Hop Metric LocPrf Weight Path
*> 23.157.160.0/24 0.0.0.0 0 100 32768 i
Total number of prefixes 1Here is the relevant configuration:
brooks@border# show protocols bgp 397143 neighbor 10.10.10.1
address-family {
ipv4-unicast {
nexthop-self
route-map {
export vultr-export
}
soft-reconfiguration {
inbound
}
}
ipv6-unicast {
nexthop-self
route-map {
export vultr-export
}
soft-reconfiguration {
inbound
}
}
}
description Vultr
remote-as 397143brooks@border# show protocols bgp 397143 address-family
ipv4-unicast {
network 23.157.160.0/24 {
}
}
ipv6-unicast {
network 2602:fe2e::/36 {
}
}brooks@border# show policy route-map vultr-export
rule 10 {
action permit
match {
ip {
address {
prefix-list neptune-networks-prefixes4
}
}
ipv6 {
address {
prefix-list neptune-networks-prefixes6
}
}
}
}brooks@border# show policy prefix-list neptune-networks-prefixes4
rule 10 {
action permit
description NEPTUNE-NETWORKS-V4
prefix 23.157.160.0/24
}brooks@border# show policy prefix-list6
prefix-list6 neptune-networks-prefixes6 {
rule 10 {
action permit
description NEPTUNE-NETWORKS-V6
le 128
prefix 2602:fe2e::/36
}
}brooks@border# show protocols static route 23.157.160.0/24
blackhole {
}brooks@border# show protocols static route6 2602:fe2e::/36
blackhole {
}