Cisco路由器故障判斷及排除

　　Peers: state pkts-rx pkts-tx type drops ckts TCP uptime

　　TCP 172.18.16.166 CONNECT 2 2 conf 0 0 0 00:224:27

　　問(wèn)題:SDLC設(shè)備不能連接到主機(jī).Milan是連接SDLC設(shè)備的遠(yuǎn)端peer.

　　建議:

　　用show dlsw peer命令顯示peer是up的.

　　milan#sh dlsw peers

　　Peers: state pkts-rx pkts-tx type drops ckts TCP uptime

　　TCP 172.18.16.166 CONNECT 2 2 conf 0 0 0 00:224:27

　　Show dlsw circuits沒(méi)有鏈路產(chǎn)生.

　　milan#show dlsw circuits

　　milan#

　　Show interface 命令顯示SDLC 地址狀態(tài)是USBUSY,這表示我們已經(jīng)成功的連接到下端路由器上.

　　Router#show interface serial 3/7

　　Serial1 is up, line protocol is up

　　Hardware is HD64570

　　MTU 1500 bytes, BW 1544 Kbit, DLY 20000 usec, rely 255/255, load 1/255

　　Encapsulation SDLC, loopback not set

　　Router link station role: SECONDARY (DTE)

　　Router link station metrics:

　　group poll not enabled

　　poll-wait 40000 seconds

　　N1 (max frame size) 12016 bits

　　modulo 8

　　sdlc vmac: 4000.5555.00--

　　sdlc addr C1 state is USBUSY

　　cls_state is CLS_STN_CLOSED

　　VS 0, VR 0, Remote VR 0, Current retransmit count 0

　　Hold queue: 0/200 IFRAMEs 0/0

　　TESTs 0/0 XIDs 0/0, DMs 0/1 FRMRs 20/20

　　RNRs 620/0 SNRMs 3/0 DISC/RDs 1/0 REJs 0/0 chain: C1/C1

　　sdlc addr C2 state is USBUSY

　　cls_state is CLS_STN_CLOSED

　　VS 0, VR 0, Remote VR 0, Current retransmit count 0

　　Hold queue: 0/200 IFRAMEs 0/0

　　TESTs 0/0 XIDs 0/0, DMs 0/0 FRMRs 0/0

　　RNRs 730/0 SNRMs 7/0 DISC/RDs 0/0 REJs 0/0 chain: C2/C2

　　Last input never, output never, output hang never

　　Last clearing of "show interface" counters never

　　Queueing strategy: fifo

　　Output queue 0/40, 0 drops; input queue 0/75, 0 drops

　　5 minute input rate 0 bits/sec, 0 packets/sec

　　5 minute output rate 0 bits/sec, 0 packets/sec

　　0 packets input, 0 bytes, 0 no buffer

　　Received 0 broadcasts, 0 runts, 0 giants

　　0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored, 0 abort

　　0 packets output, 0 bytes, 0 underruns

　　0 output errors, 0 collisions, 19 interface resets

　　0 output buffer failures, 0 output buffers swapped out

　　6 carrier transitions

　　DCD=up DSR=up DTR=up RTS=down CTS=up

　　檢查配置到達(dá)的目的MAC地址是4001.3745.1088.

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