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MSR3640

OSPF

2023-06-26提问

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zhiliao_cRn797

zhiliao_cRn797 零段

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问题描述：

两个路由器。tunle建立ospf失败
<A_MSR3640>dis interface Tunnel 0 Tunnel0 Current state: UP Line protocol state: UP Description: Tunnel0 Interface Bandwidth: 64 kbps Maximum transmission unit: 1400 Internet address: 172.16.3.12/32 (Unnumbered) Tunnel source 172.16.76.45 (GigabitEthernet0/2), destination 10.10.10.1 Tunnel keepalive disabled Tunnel TTL 255 Tunnel protocol/transport GRE/IP GRE key disabled Checksumming of GRE packets disabled Output queue - Urgent queuing: Size/Length/Discards 0/1024/0 Output queue - Protocol queuing: Size/Length/Discards 0/500/0 Output queue - FIFO queuing: Size/Length/Discards 0/75/0 Last clearing of counters: Never Last 300 seconds input rate: 0 bytes/sec, 0 bits/sec, 0 packets/sec Last 300 seconds output rate: 8 bytes/sec, 64 bits/sec, 0 packets/sec Input: 0 packets, 0 bytes, 0 drops Output: 1484923 packets, 118793840 bytes, 0 drops
<B-MSR3640>dis interface Tunnel 3 Tunnel3 Current state: UP Line protocol state: UP Description: wangjiashanzhan Bandwidth: 64 kbps Maximum transmission unit: 1400 Internet address: 172.16.0.215/32 (unnumbered) Tunnel source 10.10.10.1 (GigabitEthernet0/2), destination 172.16.76.45 Tunnel keepalive disabled Tunnel TTL 255 Tunnel protocol/transport GRE/IP GRE key disabled Checksumming of GRE packets disabled Output queue - Urgent queuing: Size/Length/Discards 0/100/0 Output queue - Protocol queuing: Size/Length/Discards 0/500/0 Output queue - FIFO queuing: Size/Length/Discards 0/75/0 Last clearing of counters: Never Last 300 seconds input rate: 0 bytes/sec, 0 bits/sec, 0 packets/sec Last 300 seconds output rate: 8 bytes/sec, 64 bits/sec, 0 packets/sec Input: 66540437 packets, 12350223328 bytes, 0 drops Output: 70278640 packets, 12268894641 bytes, 0 drops
A配置interface Tunnel0 mode gre mtu 1400 ip address unnumbered interface LoopBack0 ospf cost 1000 ospf 1 area 0.0.0.3 tcp mss 1200 source GigabitEthernet0/2 destination 10.10.10.1
B配置interface Tunnel3 mode gre description wangjiashanzhan mtu 1400 ip address unnumbered interface LoopBack0 ospf cost 1000 ospf 1 area 0.0.0.3 tcp mss 1200 source GigabitEthernet0/2 destination 172.16.76.45
两个建立tunle物理接口互相ping正常,无法通过tunle建立ospf；应该如何定位，诊断？

组网及组网描述：

RouterA-G0/2（H3C MSR36-40）---------------运营商+IPsec设备-------------G0/2-RouterB（H3C MSR36-40）；

最佳答案

新时代农民工

新时代农民工九段

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1.22.1 OSPF 邻居无法建立

1. 故障现象 OSPF 邻居无法建立。

2. 分析如果物理连接和下层协议正常，则检查接口上配置的 OSPF 参数，必须保证与相邻路由器的参数一致，区域号相同，网段与掩码也必须一致（点到点与虚连接的网段与掩码可以不同）。

3. 处理过程

(1) 使用 display ospf peer 命令查看 OSPF 邻居状态。

(2) 使用 display ospf interface 命令查看 OSPF 接口的信息。

(3) 检查物理连接及下层协议是否正常运行，可通过 ping 命令测试。若从本地路由器 Ping 对端路由器不通，则表明物理连接和下层协议有问题。

(4) 检查 OSPF 定时器，在同一接口上邻居失效时间应至少为 Hello 报文发送时间间隔的 4 倍。

(5) 如果是 NBMA 网络，则应该使用 peer ip-address 命令手工指定邻居。

(6) 如果网络类型为广播网或 NBMA，则至少有一个接口的路由器优先级大于零。

路由器1------VPN1------------运营商专线+ipsec--------VPN2-------路由器2 路由器1-2可以互相通过GRE源地址互相ping通，检查tunl链路协议，显示down;不能建立ospf邻居；如何定位排查问题？ Tunnel mode gre dis interface Tunnel 0 Tunnel0 Current state: UP Line protocol state: DOWN Description: Tunnel0 Interface Bandwidth: 64 kbps Maximum transmission unit: 1400 Internet address: 172.16.3.12/32 (Unnumbered) Tunnel source 172.16.76.45 (GigabitEthernet0/2), destination 10.10.10.1 Tunnel keepalive enabled, Period(10 s), Retries(5) Tunnel TTL 255 Tunnel protocol/transport GRE/IP GRE key disabled Checksumming of GRE packets disabled Output queue - Urgent queuing: Size/Length/Discards 0/1024/0 Output queue - Protocol queuing: Size/Length/Discards 0/500/0 Output queue - FIFO queuing: Size/Length/Discards 0/75/0 Last clearing of counters: Never Last 300 seconds input rate: 0 bytes/sec, 0 bits/sec, 0 packets/sec Last 300 seconds output rate: 4 bytes/sec, 32 bits/sec, 0 packets/sec Input: 0 packets, 0 bytes, 0 drops Output: 43 packets, 1704 bytes, 0 drops Output: 43 packets, 1704 bytes, 0 drops ----------------------------------- dis ospf statistics packet Tunnel 0 OSPF Process 1 with Router ID 172.16.3.12 Packet Statistics Area: 0.0.0.3 Interface: 172.16.3.12 (Tunnel0) DD LSR LSU ACK Total Input : 0 0 0 0 0 Output: 0 0 0 0 0

zhiliao_cRn797 发表时间：2023-10-06 更多>>

用tunle建立邻居；ospf peer看不见邻居状态；dis ospf interface Tunnel 0 OSPF Process 1 with Router ID 172.16.3.12 Interfaces Interface: 172.16.3.12 (Tunnel0) Cost: 1000 State: P-2-P Type: PTP MTU: 1400 Unnumbered Timers: Hello 10, Dead 40, Poll 40, Retransmit 5, Transmit Delay 1 FRR backup: Enabled Enabled by interface configuration (including secondary IP addresses) MD5 authentication enabled. The last key is 1.

zhiliao_cRn797 发表时间：2023-06-26

参考下OSPF故障处理吧 https://www.h3c.com/cn/Service/Document_Software/Document_Center/Home/Routers/00-Public/Maintenance/Troubleshooting/H3C_MSR_V7_R6728-4883/?CHID=776126

新时代农民工发表时间：2023-06-26

回复新时代农民工:

dis ospf statistics packet Tunnel 0 OSPF Process 1 with Router ID 172.16.3.12 Packet Statistics Area: 0.0.0.3 Interface: 172.16.3.12 (Tunnel0) DD LSR LSU ACK Total Input : 0 0 0 0 0 Output: 0 0 0 0 0 Tun0 UP DOWN (Protocol down)

zhiliao_cRn797 发表时间：2023-10-06

回复新时代农民工:

Tun口 Protocol显示down,ospf 报文，tun接口提示未发送，未接受

zhiliao_cRn797 发表时间：2023-10-06