ospf over atm case1个:卡在EXCHANGE

Router1#sh ip os nei

Neighbor ID     Pri   State    

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。

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#

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   0/1Lo0             
152   0  2.2.2.2/32   1     LOOP  0/0

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 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)

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

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
oam-pvc manage
encapsulation aal5snap

Router1#sh ip os nei

Neighbor ID  Pri   State Dead Time   Address         
Interface 2.2.2.2   0   FULL/  -  00:00:38 192.168.0.1   ATM2/0.1