29 Mar 2019, 18:57 by rr...@tutanota.de:

> Hi,
>
> Has anyone encountered this before ?
>
> Neighbor            AS    MsgRcvd    MsgSent  OutQ Up/Down  State/PrfRcvd
> EXT-V6-R2           65515         50         40     0 00:02:55 Active
> EXT-V4-R2           65515         38         37     0 00:27:42      1
> After approx just over 2 minutes, the V6 flaps, bu the V4 remains rock solid.
>
> The boxes are sitting right next to each other, connected over an OpenBSD 
> LACP trunk.
>
> I have made the pf rules as simple as possible:
>
> table <my_router_interfaces> counters {self}
> table <bsd_friends> counters {192.0.2.1,2001:DB8::1}
> pass in quick proto {tcp,udp,icmp} from <bsd_friends> to 
> <my_router_interfaces> modulate state
> pass out quick proto {tcp,udp,icmp} from <my_router_interfaces> to 
> <bsd_friends> modulate state
>
> The bgpd config is also simple:
>
> MY_ROUTER_ID_V4="192.0.2.2"
> MY_ROUTER_ID_V6="2001:DB8::2"
> MY_ASN="64515"
> AS $MY_ASN
> router-id $MY_ROUTER_ID_V4
> rde med compare always
> network inet connected
> network inet6 connected
> group its_internal_v4 {
>         remote-as 65515
>         announce IPv6 none
>         neighbor 192.0.2.1 {
>                 local-address 192.0.2.2
>                 descr "EXT-V4-R2"
>         }
> }
> group its_internal_v6 {
>         remote-as 65515
>         announce IPv6 none
>         neighbor 2001:DB8::1 {
>                 local-address 2001:DB8::2
>                 descr "EXT-V6-R2"
>         }
> }
>

Forgive me, I forgot to include what shows in the logs:

sending IPv4 unicast EOR marker
received IPv4 unicast EOR marker
received notification: HoldTimer expired
state change Established -> Idle, reason: NOTIFICATION received
state change Idle -> Connect, reason: Start
state change Connect -> OpenSent, reason: Connection opened
state change OpenSent -> OpenConfirm, reason: OPEN message received
state change OpenConfirm -> Established, reason: KEEPALIVE message received
sending IPv4 unicast EOR marker
received IPv4 unicast EOR marker

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