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HP : 0 / 376
MP : 98 / 4483
EXP : 6%
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名动江湖
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两台Cisco 2611路由器A和B，配置如下：
A：PRI 1CE1B模块、WIC-1T
B：WIC-1T
连接状况为：A通过非平衡电缆连接到RD ASM-40猫，然后再在这个猫上通过V35线缆连接到B的WIC-1T模块上。
A的配置：
controller E1 1/0
framing no-crc4
linecode hdb3
channel-group 1 timeslots 1-31
!
interface Loopback0
ip address 192.168.0.1 255.255.255.0
!
interface Serial1/0:1
ip address 10.101.199.250 255.255.255.252
encapsulation ppp
B的配置：
interface Serial0/0
bandwidth 2048
ip address 10.101.199.249 255.255.255.252
encapsulation ppp
no fair-queue
!
现在的情况是，我在A上show control e1显示为Down状态，且路由器后面的PRI 1CE1B模块上的Local Alarm灯显示为橙色，A上的Serial 1/0:1的状态为reset，且有大量的CRC错误。如下：
AAAA#show controllers e1
E1 1/0 is down.
Applique type is Channelized E1 - balanced
Transmitter is sending remote alarm.
Receiver has loss of frame.
alarm-trigger is not set
Framing is CRC4, Line Code is HDB3, Clock Source is Line.
Data in current interval (134 seconds elapsed):
0 Line Code Violations, 0 Path Code Violations
0 Slip Secs, 134 Fr Loss Secs, 0 Line Err Secs, 0 Degraded Mins
0 Errored Secs, 0 Bursty Err Secs, 0 Severely Err Secs, 134 Unavail Secs
Total Data (last 8 15 minute intervals):
1166801 Line Code Violations, 0 Path Code Violations,
1 Slip Secs, 6667 Fr Loss Secs, 100 Line Err Secs, 0 Degraded Mins,
1 Errored Secs, 0 Bursty Err Secs, 3 Severely Err Secs, 6679 Unavail Secs
AAAA#show int serial 1/0:1
Serial1/0:1 is reset, line protocol is down
Hardware is DSX1
Internet address is 10.147.201.250/30
MTU 1500 bytes, BW 1984 Kbit, DLY 20000 usec,
reliability 186/255, txload 1/255, rxload 1/255
Encapsulation PPP, loopback not set
Keepalive set (10 sec)
LCP Closed
Closed: IPCP, CDPCP
Last input 00:00:01, output never, output hang never
Last clearing of "show interface" counters 01:34:28
Input queue: 0/75/316560/0 (size/max/drops/flushes); Total output drops: 776
Queueing strategy: weighted fair
Output queue: 0/1000/64/0 (size/max total/threshold/drops)
Conversations 0/1/256 (active/max active/max total)
Reserved Conversations 0/0 (allocated/max allocated)
Available Bandwidth 1488 kilobits/sec
5 minute input rate 0 bits/sec, 0 packets/sec
5 minute output rate 0 bits/sec, 0 packets/sec
488 packets input, 6832 bytes, 0 no buffer
Received 0 broadcasts, 4382 runts, 0 giants, 0 throttles
316563 input errors, 3994 CRC, 322240 frame, 0 overrun, 0 ignored, 317393 abort
44 packets output, 616 bytes, 0 underruns
0 output errors, 0 collisions, 192 interface resets
0 output buffer failures, 0 output buffers swapped out
2 carrier transitions
Timeslot(s) Used:1-31, Transmitter delay is 0 flags
我用BNC接头将A上的同轴电缆环起来，可以看见A上的PRI 1CE1B的Local Alarm橙色指示灯灭了，且E1的状态显示如下：
wutong1#show controllers e1
E1 1/0 is up.
Applique type is Channelized E1 - balanced
No alarms detected.
alarm-trigger is not set
Framing is CRC4, Line Code is HDB3, Clock Source is Line.
Data in current interval (335 seconds elapsed):
788 Line Code Violations, 0 Path Code Violations
0 Slip Secs, 285 Fr Loss Secs, 1 Line Err Secs, 0 Degraded Mins
0 Errored Secs, 0 Bursty Err Secs, 0 Severely Err Secs, 285 Unavail Secs
Total Data (last 8 15 minute intervals):
1166801 Line Code Violations, 0 Path Code Violations,
1 Slip Secs, 6667 Fr Loss Secs, 100 Line Err Secs, 0 Degraded Mins,
1 Errored Secs, 0 Bursty Err Secs, 3 Severely Err Secs, 6679 Unavail Secs
这个原因究竟是什么造成的呢，谢谢！还有，看这个E1的状态上显示的为balanced，而平衡的是RJ45接头啊，我们使用的这个BNC接头不是非平衡的吗，是不是接法错误，谢谢！ |
