ospf over atm case1个:卡在EXCHANGE-网络通信专区

ospf over atm case1个:卡在EXCHANGE

作者：胜利的大熊猫编辑：史洋 2009-12-21 19:02 来源：IT168�

　　(1)在本端看邻居。

　　Router1#sh ip os nei

　　Neighbor ID Pri State &nbs p; Dead Time Address Interface

　　2.2.2.2 0 EXCHANGE/ - 00:00:38 192.168.0.1 ATM2/0.1

　　.Dec 1 12:15:35: %OSPF-5-ADJCHG: Process 1, Nbr 2.2.2.2 on ATM2/0.1 from EXCHANGE to DOWN, Neighbor Down: Too many

　　retransmissions

　　#freebeme评：不一会就ospf邻居就是down状态了。#

　　(2)首先我们在本地ping对端路由器的atm子接口地址。扩展ping，ping1000个包。

　　Router1#ping

　　Protocol [ip]:

　　Target IP address: 192.168.0.1

　　Repeat count [5]: 1000

　　Datagram size [100]:

　　Timeout in seconds [2]:

　　Extended commands [n]:

　　Sweep range of sizes [n]:

　　Type escape sequence to abort.

　　Sending 1000, 100-byte ICMP Echos to 192.168.0.1, timeout is 2 seconds:

　　.!!!!!!!!!!!!!!!.!!!!!!!!!!!!!!!!!!!!!!!!!!!.!!!!!!!!!!!!!!!!!!!!!!!!!

　　!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!.!!!!!!!!!!!!!!!!!!!!!!

　　!!!!!.!!!!!!!!!!!!!!!!!!!!!!!!!!!.!!!!!!!!!!!!!!!!!!!!!!!!!!!.!!!!!!!!

　　!!!!!!!!!!!!!!!!!!!.!!!!!!!!!!!!!!!!!!!!!!!!!!!.!!!!!!!!!!!!!!!!!!!!!!

　　!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!.!!!!!!!!!!!!!!!!!!!

　　!!!!!!!!.!!!!!!!!!!!!!!!!!!!!!!!!!!!.!!!!!!!!!!!!!!!!!!!!!!!!!!!.!!!!!

　　!!!!!!!!!!!!!!!!!!!!!!.!!!!!!!!!!!!!!!!!!!!!!!!!!!.!!!!!!!!!!!!!!!!!!!

　　!!!!!!!!.!!!!!!!!!!!!!!!!!!!!!!!!!!!.!!!!!!!!!!!!!!!!!!!!!!!!!!!.!!!!!

　　!!!!!!!!!!!!!!!!!!!!!!!!.!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

　　!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!.!!!!!!!!!

　　!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!.!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

　　.!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!.!!!!!!!!!!!!!!!!!!!!!!!!!!!!

　　!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

　　!!!!!!!.!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

　　.Dec 1 12:15:35: %OSPF-5-ADJCHG: Process 1, Nbr 2.2.2.2 on ATM2/0.1 from EXCHANGE to DOWN, Neighbor Down: Too many

　　retransmissions!!!!!!!!

　　!!!!!!!!!!!!!!!!!!!!

　　Success rate is 97 percent (976/1000), round-trip min/avg/max = 76/96/112 ms

　　Router1#

　　#明显，Down, Init, Attempt, 2-way, Exstart, Exchange, Loading 以及Full是ospf的几个

　　邻接状态。Exchange，是将要flooding的状态。现在看到，链路有问题，不足以维持

　　稳定的flooding。

　　(3)然后看看对端的接口是否起了ospf

　　Router2#sh ip os int brie

　　Interface PID Area IP Address/Mask Cost State Nbrs F/C

　　AT7/1/0.88 1 0 192.168.0.1/30 10 P2P 0/1

　　Lo0 152 0 2.2.2.2/32 1 LOOP 0/0

　　(4)在对端路由器看接口。

　　Router2#sh ip os int AT7/1/1.1

　　.Dec 1 11:54:04: %OSPF-5-ADJCHG: Process 1, Nbr 2.2.2.2 on ATM2/0.1 from DON to DOWN, Neighbor Down: Ignore timer expired52

　　ATM7/1/0.88 is up, line protocol is up

　　Internet Address 192.168.0.1/30, Area 6

　　Process ID 1, Router ID 2.2.2.2, Network Type POINT_TO_POINT, Cost: 651

　　Transmit Delay is 1 sec, State POINT_TO_POINT

　　Timer intervals configured, Hello 10,

　　oob-resync timeout 40

　　Hello due in 00:00:08

　　Supports Link-local Signaling (LLS)

　　Index 15/36, flood queue length 0

　　Next 0x0(0)/0x0(0)

　　Last flood scan length is 1, maximum is 42

　　Last flood scan time is 0 msec, maximum is 4 msec

　　neighbor count is 0

　　Suppress hello for 0 neighbor(s)

　　(5)问题出在哪呢?

　　Router1#sh run int atm2/0.1

　　Building configuration...

　　Current configuration : 240 bytes

　　interface ATM2/0.1 point-to-point

　　description connect to Nenjiang R2 www.uptmd.com 15M

　　bandwidth 15360

　　ip address 10.10.253.142 255.255.255.252

　　pvc tobeijing 7/100

　　broadcast

　　encapsulation aal5snap

　　就是这里了。

　　查了查cisco文档。

　　http://www.cisco.com/en/US/tech/tk39/tk48/technologies_configuration_example09186a0080094570.shtml

　　这个里为了solves a communication problem 。使用了oam-pvc manage。