CR16018 OSPFv3和华为传输设备对接闪断问题的经验案例

某运营商客户使用CR16018和华为的设备对接OSPFv3，设备上线后，发现和华为对接的OSPF邻居会不定时的闪断，和中兴等其他厂商对接的OSPFv3链路一直运行正常。

%May 24 15:19:56:658 2017 SCCD-PS-IMS-CE77-H3CCR16018 OSPFV3/6/OSPFv3_LAST_NBR_DOWN: OSPFv3 42 Last neighbor down event: Router ID: 10.192.0.1  Local interface ID: 6492  Remote interface ID: 9303  Reason: DeadInterval timer expired.

%May 24 15:19:56:658 2017 SCCD-PS-IMS-CE77-H3CCR16018 OSPFV3/5/OSPFv3_NBR_CHG: OSPFv3 42 Neighbor 10.192.0.1(Route-Aggregation32) received InactivityTimer and its state from FULL to DOWN.

%May 24 15:20:00:521 2017 SCCD-PS-IMS-CE77-H3CCR16018 OSPFV3/5/OSPFv3_NBR_CHG: OSPFv3 42 Neighbor 10.192.0.1(Route-Aggregation32) received LoadingDone and its state from LOADING to FULL.

_NBR_DOWN: OSPFv3 42 Last neighbor down event: Router ID: 10.1.0.1  Local interface ID: 6493  Remote interface ID: 9304  Reason: DeadInterval timer expired.

%May 25 03:52:49:661 2017 SCCD-PS-IMS-CE77-H3CCR16018 OSPFV3/5/OSPFv3_NBR_CHG: OSPFv3 42 Neighbor 10.1.0.1(Route-Aggregation33) received InactivityTimer and its state from FULL to DOWN.

%May 25 03:53:01:122 2017 SCCD-PS-IMS-CE77-H3CCR16018 OSPFV3/5/OSPFv3_NBR_CHG: OSPFv3 42 Neighbor 10.1.0.1(Route-Aggregation33) received LoadingDone and its state from LOADING to FULL.

1．查看CR16018侧的配置没有问题：

interface Route-Aggregation33

 ip binding vpn-instance CESHI

 ospfv3 42 area 0.0.0.0

 ospfv3 cost 200

 ospfv3 timer hello 1

 ospfv3 bfd enable

 ospfv3 network-type p2p

 link-aggregation mode dynamic

 ipv6 address 2409:801B:8010:4D:1000::120/127

 ipv6 address auto link-local

 bfd min-transmit-interval 100

 bfd min-receive-interval 100

 bfd detect-multiplier 3

2.从诊断信息中可以看到，OSPF12和OSPFV3 42在同一时间点Down掉，相同颜色的路由也是同一时间Down掉；怀疑是链路问题或者的对端设备未发送Hello报文：

%May 24 17:19:48:400 2017 SCCD-PS-IMS-CE77-H3CCR16018 OSPF/6/OSPF_LAST_NBR_DOWN: OSPF 12 Last neighbor down event: Router ID: 192.168.205.14 Local address: 192.168.205.13 Remote address: 192.168.205.14 Reason: DeadInterval timer expired.

%May 24 17:19:48:402 2017 SCCD-PS-IMS-CE77-H3CCR16018 OSPF/5/OSPF_NBR_CHG: OSPF 12 Neighbor 192.168.205.14(Vlan-interface1110) from FULL to DOWN.

%May 24 17:19:48:658 2017 SCCD-PS-IMS-CE77-H3CCR16018 OSPFV3/6/OSPFv3_LAST_NBR_DOWN: OSPFv3 42 Last neighbor down event: Router ID: 192.168.200.28  Local interface ID: 6502  Remote interface ID: 67239983  Reason: DeadInterval timer expired.

%May 24 17:19:48:660 2017 SCCD-PS-IMS-CE77-H3CCR16018 OSPFV3/5/OSPFv3_NBR_CHG: OSPFv3 42 Neighbor 192.168.200.28(Vlan-interface1063) received InactivityTimer and its state from FULL to DOWN.

%May 24 16:58:18:400 2017 SCCD-PS-IMS-CE77-H3CCR16018 OSPF/6/OSPF_LAST_NBR_DOWN: OSPF 12 Last neighbor down event: Router ID: 192.168.205.10 Local address: 192.168.205.9 Remote address: 192.168.205.10 Reason: DeadInterval timer expired.

%May 24 16:58:18:402 2017 SCCD-PS-IMS-CE77-H3CCR16018 OSPF/5/OSPF_NBR_CHG: OSPF 12 Neighbor 192.168.205.10(Vlan-interface1090) from FULL to DOWN.

%May 24 16:58:18:658 2017 SCCD-PS-IMS-CE77-H3CCR16018 OSPFV3/6/OSPFv3_LAST_NBR_DOWN: OSPFv3 42 Last neighbor down event: Router ID: 192.168.200.16  Local interface ID: 6500  Remote interface ID: 67240071  Reason: DeadInterval timer expired.

%May 24 16:58:18:660 2017 SCCD-PS-IMS-CE77-H3CCR16018 OSPFV3/5/OSPFv3_NBR_CHG: OSPFv3 42 Neighbor 192.168.200.16(Vlan-interface1043) received InactivityTimer and its state from FULL to DOWN.

%May 24 16:44:39:658 2017 SCCD-PS-IMS-CE77-H3CCR16018 OSPFV3/6/OSPFv3_LAST_NBR_DOWN: OSPFv3 42 Last neighbor down event: Router ID: 192.168.200.15  Local interface ID: 6498  Remote interface ID: 67239959  Reason: DeadInterval timer expired.

%May 24 16:44:39:660 2017 SCCD-PS-IMS-CE77-H3CCR16018 OSPFV3/5/OSPFv3_NBR_CHG: OSPFv3 42 Neighbor 192.168.200.15(Vlan-interface1023) received InactivityTimer and its state from FULL to DOWN.

%May 24 16:44:40:396 2017 SCCD-PS-IMS-CE77-H3CCR16018 OSPF/6/OSPF_LAST_NBR_DOWN: OSPF 12 Last neighbor down event: Router ID: 192.168.205.6 Local address: 192.168.205.5 Remote address: 192.168.205.6 Reason: DeadInterval timer expired.

%May 24 16:44:40:397 2017 SCCD-PS-IMS-CE77-H3CCR16018 OSPF/5/OSPF_NBR_CHG: OSPF 12 Neighbor 192.168.205.6(Vlan-interface1070) from FULL to DOWN.

%May 24 16:28:16:400 2017 SCCD-PS-IMS-CE77-H3CCR16018 OSPF/6/OSPF_LAST_NBR_DOWN: OSPF 12 Last neighbor down event: Router ID: 192.168.205.2 Local address: 192.168.205.1 Remote address: 192.168.205.2 Reason: DeadInterval timer expired.

%May 24 16:28:16:403 2017 SCCD-PS-IMS-CE77-H3CCR16018 OSPF/5/OSPF_NBR_CHG: OSPF 12 Neighbor 192.168.205.2(Vlan-interface1050) from FULL to DOWN.

%May 24 16:28:16:658 2017 SCCD-PS-IMS-CE77-H3CCR16018 OSPFV3/6/OSPFv3_LAST_NBR_DOWN: OSPFv3 42 Last neighbor down event: Router ID: 192.168.20.11  Local interface ID: 6496  Remote interface ID: 67239969  Reason: DeadInterval timer expired.

%May 24 16:28:16:658 2017 SCCD-PS-IMS-CE77-H3CCR16018 OSPFV3/5/OSPFv3_NBR_CHG: OSPFv3 42 Neighbor 192.168.20.11(Vlan-interface1003) received InactivityTimer and its state from FULL to DOWN.

              OSPF Process 12 with Router ID 192.168.7.17

                        Neighbor Brief Information

 Area: 0.0.0.0       

 Router ID      Address      Pri  Dead-Time  State   Interface

 192.168.8.11  192.168.43.42  1      3       Full/ -      Vlan30

 192.168.2.23 192.168.7.17   1      3       Full/ -      RAGG1.1400

 Area: 0.0.0.12      

 Router ID       Address     Pri  Dead-Time State   Interface

 192.168.205.2 192.168.205.2  0     3     Full/DROther      Vlan1050

 192.168.205.6 192.168.205.6  0     4     Full/DROther      Vlan1070

 192.168.205.10 192.168.205.10  0   4     Full/DROther      Vlan1090

 192.168.205.14 192.168.205.14  0   4     Full/DROther      Vlan1110

 192.168.8.11  192.168.43.62    1   3     Full/ -           Vlan130

               OSPFv3 Process 42 with Router ID 10.99.4.171

 Area: 0.0.0.0       

-------------------------------------------------------------------------

 Router ID       Pri State             Dead-Time InstID Interface

 10.13.0.1       1   Full/ -           00:00:03  0      RAGG30

 10.192.0.1      1   Full/ -           00:00:03  0      RAGG32

 10.1.0.1        1   Full/ -           00:00:04  0      RAGG33

 10.210.0.1      1   Full/ -           00:00:03  0      RAGG34

 192.168.20.11  1   Full/ -           00:00:03  0      Vlan1003

 192.168.200.15  1   Full/ -           00:00:03  0      Vlan10

 192.168.200.16  1   Full/ -           00:00:03  0      Vlan11

 192.168.200.28  1   Full/ -           00:00:04  0      Vlan1063

 10.99.4.172     1   Full/ -           00:00:04  0      Vlan90

 10.99.4.141     1   Full/ -           00:00:03  0      RAGG1.1500

3. 经跟华为工程师确认，现网配置的OSPFv3 Hello timer为1s；UGW上用来控制OSPFv3 Hello报文发送的系统任务其优先级较低，无法保证hello报文及时发出，当连续4*1s以上未发出hello报文时，就会上报告警。

将两侧的OSPFv3 timer hello修改为3s后问题解决。

处理和友商设备对接的问题时，要保持两边的参数一致，并且要了解相应报文的处理机制。