ospf virtual link not coming up

[Martin Kraus]

Hi.
I'm playing with ospf and got stuck on a virtual link with a cisco router. The
cisco virtual link is up and I can see hello packets coming to the linux
router but nothing going out. It's connected through area 0.0.0.1. I can see
both routers in lsdb. 

debug in bird produces following:

OSPF: Received packet for unknown vlink (ID 192.168.70.1, IP 10.5.1.1)

I assume I'm doing something wrong but I can't see what as the config seems
very simple. 


bird RID 10.4.7.1:

        area 0.0.0.1 {
                interface "r2" {
                        cost 10;
                        type pointopoint;
                        neighbors {
                                10.4.8.2;
                        };
                };
                virtual link 192.168.70.1 {
                };
        };

bird> show ospf interfaces
Virtual link to 192.168.70.1:
    Peer IP: 0.0.0.0
    Transit area: 0.0.0.1 (1)
    Interface: "(none)"
    State: down
    Priority: 0
    Cost: 0
    Hello timer: 10
    Wait timer: 40
    Dead timer: 40
    Retransmit timer: 5


bird> show ospf lsadb area 1 type 1

Area 0.0.0.1

 Type   LS ID           Router           Age  Sequence  Checksum
 0001  192.168.60.1    192.168.60.1      353  80000008    5485
 0001  192.168.70.1    192.168.70.1      232  80000006    b37b
 0001  10.4.7.1        10.4.7.1          146  80000019    1312


cisco RID 192.168.70.1:

router ospf 1
area 0.0.0.1 virtual-link 10.4.7.1

R3#show ip ospf virtual-links 
Virtual Link OSPF_VL2 to router 10.4.7.1 is up
  Run as demand circuit
  DoNotAge LSA allowed.
  Transit area 0.0.0.1, via interface FastEthernet0/1, Cost of using 20
  Transmit Delay is 1 sec, State POINT_TO_POINT,
  Timer intervals configured, Hello 10, Dead 40, Wait 40, Retransmit 5
    Hello due in 00:00:04


thanks for help
Martin