vpn6-mpls routes on BIRD 2

[Chris Herdt]

That was it! Thank you!

In case it is useful for anyone else, here's my entire config (ASNs and IPs
anonymized):

# start config
router id 127.0.0.1;

vpn4 table vpntab4;
vpn6 table vpntab6;

protocol bgp peer1 {
        local as 65321;
        neighbor 192.168.42.1 as 65321;
        hold time 180;
        vpn4 mpls {
                table vpntab4;
                import all;
        };
        vpn6 mpls {
                table vpntab6;
                import all;
                extended next hop;
        };
}
# end config


On Fri, Aug 24, 2018 at 12:24 PM Jan Maria Matejka <jan.matejka at nic.cz>
wrote:

> I suspect you are missing the "extended next hop" option in your
> BGP protocol config.
>
> Thanks
> Maria
>
> On 08/24/2018 07:02 PM, Chris Herdt wrote:
> > When I run bird in debug mode, I do see a lot of messages about missing
> next hop:
> >
> > bird: peer1: Missing next hop address
> > bird: peer1: Invalid NEXT_HOP attribute
> > bird: peer1: Invalid NEXT_HOP attribute
> > bird: peer1: Invalid NEXT_HOP attribute
> > [etc.]
> >
> > When I examine the update packets coming in for IPv6 route
> announcements, the next hop is an IPv4 address in this format (addresses
> changed for anonymity):
> >
> > ::ffff:192.168.42.6
> >
> > I have also tried a couple different things in my config files to
> explicitly set the next hop address, but the next hop address is still
> missing:
> >
> > filter setnexthop
> > ip explicit_next_hop;
> > {
> >     explicit_next_hop = fd12:3456:789a:1::1;
> >     bgp_next_hop = explicit_next_hop;
> >     accept;
> > }
> >
> > ...
> >
> >         vpn6 mpls {
> >                 table vpntab6;
> >                 missing lladdr ignore;
> >                 next hop self;
> >                 import filter setnexthop;
> >         };
> >
> >
> > Anyone have any advice?
> >
> > Thanks,
> >
> > On Thu, Aug 23, 2018 at 8:42 PM Arvin Gan <AGan at advaoptical.com <mailto:
> AGan at advaoptical.com>> wrote:
> >
> >     Hi ,____
> >
> >       From your protocols info, “BGP Next hop:   ::”  in channel
> vpn6-mpls, if next hop is empty, the route is withdrawn. Suggest to check
> it.____
> >
> >     __ __
> >
> >     Best Regards,____
> >
> >     Arvin Gan____
> >
> >     __ __
> >
> >     *From:*Bird-users <bird-users-bounces at network.cz <mailto:
> bird-users-bounces at network.cz>> *On Behalf Of *Chris Herdt
> >     *Sent:* Friday, August 24, 2018 5:48 AM
> >     *To:* bird-users at network.cz <mailto:bird-users at network.cz>
> >     *Subject:* vpn6-mpls routes on BIRD 2____
> >
> >     __ __
> >
> >     Thanks to the list for all the help you've given me so far!____
> >
> >     __ __
> >
> >     Another question: I am running BIRD 2.0.2 and peering with a host
> that is announcing vpn4 mpls and vpn6 mpls routes.____
> >
> >     __ __
> >
> >     The vpn4 mpls routes are working, but all of the vpn6 mpls routes
> appear as withdrawn routes. I'm not sure why -- I looked at the packet
> capture in Wireshark and the UPDATE messages containing the IPv6 routes all
> show zero for Withdrawn Routes Length. Any ideas?____
> >
> >     __ __
> >
> >     Here's the result of 'show protocols all peer1' (addresses
> changed):____
> >
> >     __ __
> >
> >     bird> show protocols all peer1
> >     Name       Proto      Table      State  Since         Info
> >     peer1      BGP        ---        up     14:35:04.353  Established
> >       BGP state:          Established
> >         Neighbor address: 192.168.42.1
> >         Neighbor AS:      65321
> >         Neighbor ID:      192.168.42.1
> >         Local capabilities
> >           Multiprotocol
> >             AF announced: vpn4-mpls vpn6-mpls
> >           Route refresh
> >           Graceful restart
> >           4-octet AS numbers
> >           Enhanced refresh
> >         Neighbor capabilities
> >           Multiprotocol
> >             AF announced: vpn4-mpls vpn6-mpls
> >           Route refresh
> >           Extended next hop
> >             IPv6 nexthop: ipv4 ipv4-mc
> >           Graceful restart
> >             Restart time: 120
> >             AF supported: vpn4-mpls vpn6-mpls
> >             AF preserved:
> >           4-octet AS numbers
> >         Session:          internal multihop AS4
> >         Source address:   192.168.100.1
> >         Hold timer:       12.954/15
> >         Keepalive timer:  0.005/5
> >       Channel vpn4-mpls
> >         State:          UP
> >         Table:          vpntab4
> >         Preference:     100
> >         Input filter:   ACCEPT
> >         Output filter:  REJECT
> >         Routes:         9771 imported, 0 exported
> >         Route change stats:     received   rejected   filtered
> ignored   accepted
> >           Import updates:           9771          0          0
> 0       9771
> >           Import withdraws:           20          0        ---
> 20          0
> >           Export updates:           9771       9771          0
> ---          0
> >           Export withdraws:            0        ---        ---
> ---          0
> >         BGP Next hop:   192.168.100.1
> >         IGP IPv4 table: master4
> >       Channel vpn6-mpls
> >         State:          UP
> >         Table:          vpntab6
> >         Preference:     100
> >         Input filter:   ACCEPT
> >         Output filter:  REJECT
> >         Routes:         0 imported, 0 exported
> >         Route change stats:     received   rejected   filtered
> ignored   accepted
> >           Import updates:              0          0          0
> 0          0
> >           Import withdraws:         2785          0        ---
> 2785          0
> >           Export updates:              0          0          0
> ---          0
> >           Export withdraws:            0        ---        ---
> ---          0
> >         BGP Next hop:   ::
> >         IGP IPv6 table: master6____
> >
> >     __ __
> >
> >
> >     -- ____
> >
> >     Chris Herdt
> >     https://osric.com/chris/____
> >
> >
> >
> > --
> > Chris Herdt
> > https://osric.com/chris/
>
>

-- 
Chris Herdt
https://osric.com/chris/
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