Hi,
we have a bgp peering session with our isp on ipv4 and are learning our default gateway through it. In parallel we have also an ipv6 peering session with the same ISP which allows us to learn the ipv6 default gateway.
But through this second bgp session we are also learning IPv4 prefixes which is not what we want (roughly 3100 ipv4 entries).
I tryed to implement some prefix-list filters without real success.
Does anyone has some insights on how to achieve this (filtering ipv4 address from ipv6 bgp neighbor annoucments).
Here our config:
router bgp 64555
no bgp log-neighbor-changes
neighbor 2991:f1f1:52:8000::5 remote-as 65186
neighbor 2991:f1f1:52:8000::5 description ISP1-IPV6
neighbor 192.168.1.33 remote-as 786
neighbor 192.168.1.33 description ISP1
!
address-family ipv4
neighbor 2991:f1f1:52:8000::5 activate
neighbor 192.168.1.33 activate
neighbor 192.168.1.33 send-community
neighbor 192.168.1.33 next-hop-self
neighbor 192.168.1.33 soft-reconfiguration inbound
neighbor 192.168.1.33 prefix-list DEFAULT in
neighbor 192.168.1.33 prefix-list CUSTOMER out
neighbor 192.168.1.33 route-map Peer-ISP-In in
neighbor 192.168.1.33 route-map Peer-ISP-Out out
no auto-summary
no synchronization
network 1.2.3.0
exit-address-family
!
address-family ipv6
neighbor 2991:f1f1:52:8000::5 activate
neighbor 2991:f1f1:52:8000::5 send-community
neighbor 2991:f1f1:52:8000::5 next-hop-self
neighbor 2991:f1f1:52:8000::5 soft-reconfiguration inbound
neighbor 2991:f1f1:52:8000::5 prefix-list DEFAULT6 in
neighbor 2991:f1f1:52:8000::5 prefix-list CUSTOMER6 out
neighbor 2991:f1f1:52:8000::5 route-map Peer-ISP6 out
network 2991:f1f1:55::/48
exit-address-family
!
....
ipv6 prefix-list DEFAULT6 seq 5 permit ::/0
!
ipv6 prefix-list CUSTOMER6 seq 5 permit 2991:f1f1:55::/48 le 64
route-map Peer-Janet6-Out permit 10
set community 65186:2
!
route-map Peer-ISP6-In permit 10
set local-preference 90
!
Any idea is welcome and will gratefully appreciated.
seb.
