OSPF dont import routes from LSAdb

[曾小小]

Hello, thank you for your help.

The next day after the failure, I restart ospf_business on faulty r2.
Discovery can be seen from r0 sent over the default route on r2 routing
table. I was very surprised, and why? Next, how do I troubleshoot?

r0 is a Layer 3 switch.

The following is the recovery seen in r0-2 status.

r1:

bird> show ospf state all ospf_business
1016 -
     area 0.0.0.20

     router x.y.z.1
     distance 10
     network x.y.z.0/28 metric 1
     external 0.0.0.0 / 0 metric2 1 tag 00000001

     router x.y.z.3
     distance 0
     network x.y.z.0/28 metric 10
     external a.b.c.d/25 metric2 20 via x.y.z.1

     network x.y.z.0/28
     dr x.y.z.3
     distance 10
     router x.y.z.3
     router x.y.z.1

r2:

bird> show ospf state all ospf_business
1016 -
     area 0.0.0.30

     router x.y.z.17
     distance 10
     network x.y.z.16/28 metric 1
     external 0.0.0.0 / 0 metric2 1 tag 00000001

     router x.y.z.19
     distance 0
     network x.y.z.16/28 metric 10

     network x.y.z.16/28
     dr x.y.z.17
     distance 10
     router x.y.z.17
     router x.y.z.19

r0:

<r0-switch> display ospf brief

OSPF Process 100 with Router ID x.y.z.1
OSPF Protocol Information

 RouterID: x.y.z.1 Border Router: AS
 Multi-VPN-Instance is not enabled
 Graceful-restart capability: disabled
 Helper support capability: not configured
 Spf-schedule-interval: max 10000ms, start 500ms, hold 1000ms
 Default ASE parameters: Metric: 1 Tag: 1 Type: 2
 Route Preference: 10
 ASE Route Preference: 150
 SPF Computation Count: 62
 RFC 1583 Compatible
 Retransmission limitation is disabled
 Area Count: 1 Nssa Area Count: 0
 ExChange / Loading Neighbors: 0
 Process total up interface count: 1
 Process valid up interface count: 1

 Area: 0.0.0.20
 Authtype: None Area flag: Normal
 SPF scheduled Count: 62
 ExChange / Loading Neighbors: 0
 Router ID conflict state: Normal
 Area interface up count: 1

 Interface: x.y.z.1 (Vlanif3)
 Cost: 1 State: BDR Type: Broadcast MTU: 1500
 Priority: 1
 Designated Router: x.y.z.3
 Backup Designated Router: x.y.z.1
 Timers: Hello 10, Dead 40, Poll 120, Retransmit 5, Transmit Delay 1

OSPF Process 200 with Router ID x.y.z.17
OSPF Protocol Information

 RouterID: x.y.z.17 Border Router: AS
 Multi-VPN-Instance is not enabled
 Graceful-restart capability: disabled
 Helper support capability: not configured
 Spf-schedule-interval: max 10000ms, start 500ms, hold 1000ms
 Default ASE parameters: Metric: 1 Tag: 1 Type: 2
 Route Preference: 10
 ASE Route Preference: 150
 SPF Computation Count: 53
 RFC 1583 Compatible
 Retransmission limitation is disabled
 Area Count: 1 Nssa Area Count: 0
 ExChange / Loading Neighbors: 0
 Process total up interface count: 1
 Process valid up interface count: 1

 Area: 0.0.0.30
 Authtype: None Area flag: Normal
 SPF scheduled Count: 53
 ExChange / Loading Neighbors: 0
 Router ID conflict state: Normal
 Area interface up count: 1

 Interface: x.y.z.17 (Vlanif4)
 Cost: 1 State: DR Type: Broadcast MTU: 1500
 Priority: 1
 Designated Router: x.y.z.17
 Backup Designated Router: x.y.z.19
 Timers: Hello 10, Dead 40, Poll 120, Retransmit 5, Transmit Delay 1

The following is r0 configurations:

interface Vlanif3
 ip address x.y.z.1 255.255.255.240
 ospf authentication-mode md5 1 cipher pass1
#
interface Vlanif4
 ip address x.y.z.17 255.255.255.240
 ospf authentication-mode md5 1 cipher pass2

#
ospf 100 router-id x.y.z.1
 description business about bussiness1
 default-route-advertise
 area 0.0.0.20
  network x.y.z.0 0.0.0.15
#
ospf 200 router-id x.y.z.17
 description business about bussiness2
 default-route-advertise
 area 0.0.0.30
    network x.y.z.16 0.0.0.15
#
ip route-static 0.0.0.0 0.0.0.0 q.w.e.r
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