(1)在MSR36上查看SR88邻居状态如下:
===============display ospf peer===============
OSPF Process 1 with Router ID 10.4.250.130
Neighbor Brief Information
Area: 0.0.0.11
Router ID Address Pri Dead-Time State Interface
10.230.255.10 10.4.250.133 1 40 Init/ - GE0/1
//这里显示故障(主)SR88的接口地址是10.4.250.133
10.4.255.177 10.4.248.129 1 31 Full/ - Vlan30
在SR88上查看MSR36状态如下:
10.4.250.130 10.4.250.130 1 33 ExStart/ - GE7/0/3.2071
//这里显示故障(主)SR88的出接口是GE7/0/3.2071,地址是10.4.250.129,与上面的地址不符。
Interface: 10.4.250.129 (GigabitEthernet7/0/3.2071) --> 10.4.250.130
Cost: 1 State: P-2-P Type: PTP MTU: 1500
Timers: Hello 10, Dead 40, Poll 40, Retransmit 5, Transmit Delay 1
FRR backup: Enabled
Enabled by network configuration
interface GigabitEthernet7/0/3.2071
description To_化隆联社扎巴信用社
ip address 10.4.250.129 255.255.255.252
ospf network-type p2p
vlan-type dot1q vid 2071
而这个10.4.250.133是故障88上的一个地址,这个地址与另一个网点的迈普设备能正常建立ospf邻居。
且现场将MSR36的G0/1口人为shutdown,再undo shutdown,后,在MSR上查看邻居peer,发现故障88的接口地址又变为10.4.250.121:
(2)检查两端的ospf配置,没有什么异常,两端ospf的hello、dead时间都是默认值,一致。
(3)MSR36的日志里面提示ospf状态变为down:
Line 14710: %@14677%Mar 19 02:06:30:386 2020 OSPF/6/OSPF_LAST_NBR_DOWN: OSPF 1 Last neighbor down event: Router ID: 10.230.255.10 Local address: 10.4.250.130 Remote address: 10.4.250.133 Reason: Ospf_ifachange.
Line 14710: %@14677%Mar 19 02:06:30:386 2020 OSPF/6/OSPF_LAST_NBR_DOWN: OSPF 1 Last neighbor down event: Router ID: 10.230.255.10 Local address: 10.4.250.130 Remote address: 10.4.250.133 Reason: Ospf_ifachange.
Line 14711: %@14678%Mar 19 02:06:30:389 2020 OSPF/5/OSPF_NBR_CHG: OSPF 1 Neighbor 10.4.250.133(GigabitEthernet0/1) changed from INIT to DOWN.
Line 14711: %@14678%Mar 19 02:06:30:389 2020 OSPF/5/OSPF_NBR_CHG: OSPF 1 Neighbor 10.4.250.133(GigabitEthernet0/1) changed from INIT to DOWN.
SR88的日志里面提示:
Line 27553: %Mar 19 10:07:09:268 2020 QHRC-A-NT-WAN-WRT01 OSPF/6/OSPF_LAST_NBR_DOWN: OSPF 100 Last neighbor down event: Router ID: 10.4.250.130 Local address: 10.4.250.129 Remote address: 10.4.250.130 Reason: DeadInterval timer expired.
Line 27554: %Mar 19 10:07:09:269 2020 QHRC-A-NT-WAN-WRT01 OSPF/5/OSPF_NBR_CHG: OSPF 100 Neighbor 10.4.250.130(GigabitEthernet7/0/3.2071) changed from EXSTART to DOWN.
查看两个设备有路由,且在MSR36上pingSR88,是通的,且不丢包:
Line 3096: %Mar 18 08:16:26:063 2020 SHELL/6/SHELL_CMD: -Line=vty0-IPAddr=10.4.250.129-User=admin; Command is ping -s 1800 -a 10.4.250.130 10.4.250.129
Line 3097: %Mar 18 08:16:27:084 2020 PING/6/PING_STATISTICS: Ping statistics for 10.4.250.129: 5 packets transmitted, 5 packets received, 0.0% packet loss, round-trip min/avg/max/std-dev = 31.964/37.473/48.604/6.475 ms.
(4)在MSR36这一端收集debug ospf event,显示如下:
怀疑是对端88的地址有问题
*Mar 19 02:11:02:305 2020 OSPF/7/DEBUG:
OSPF: Recv packet from unknown non-shamlink/vlink nbr 10.4.250.129.
*Mar 19 02:11:02:426 2020 OSPF/7/DEBUG:
OSPF: Recv packet from unknown non-shamlink/vlink nbr 10.4.254.109.
*Mar 19 02:11:02:427 2020 OSPF/7/DEBUG:
OSPF: Recv packet from unknown non-shamlink/vlink nbr 10.4.254.113.
*Mar 19 02:11:02:427 2020 OSPF/7/DEBUG:
OSPF: Recv packet from unknown non-shamlink/vlink nbr 10.4.254.237.
*Mar 19 02:11:02:428 2020 OSPF/7/DEBUG:
OSPF: Recv packet from unknown non-shamlink/vlink nbr 10.4.250.121.
*Mar 19 02:11:02:429 2020 OSPF/7/DEBUG:
OSPF: Recv packet from unknown non-shamlink/vlink nbr 10.4.250.125.