廣域網(wǎng)技術(shù)簡介(完整版)
【正文】 0814 04:10 重點內(nèi)容在后面的分析和環(huán)回測試 廣域網(wǎng)排錯 常用排錯命令 show atm vc show controllers show atm ilmi show interface show interface Router show interfaces atm 2/0 ATM2/0 is up, line protocol is up Hardware is A6 ATM MTU 4470 bytes, sub MTU 4470, BW 155520 kbit, DLY 80 usec, reliability 255/255, txload 1/255, rxload 1/255 Encapsulation ATM, loopback set Keepalive not supported Encapsulation(s): AAL5, PVC mode 2048 maximum active VCs, 1024 VCs per VP, 1 current VCCs VC idle disconnect time: 300 seconds Last input 00:02:45, output 00:02:45, output hang never Last clearing of show interface counter never show atm ilmi Switchshow atm ilmistatus atm 0/0/0 Interface : ATM0/0/0 Interface Type : Private UNI (Networkside) ILMI VCC : (0, 16) ILMI Keepalive : Disabled ILMI State: UpAndNormal Peer IP Addr: Peer IF Name: ATM2 Peer MaxVPIbits: 0 Peer MaxVCIbits: 10 Peer MaxVPCs: 0 Peer MaxVCCs: 4096 Peer MaxSvccVpi: 0 Peer MinSvccVci: 0 Peer MaxSvpcVpi: 0 Configured Prefix(s) : show atm vc Switchshow atm vc Interface VPI VCI Type XInterface XVPI XVCI Encap Status ATM0/0/0 0 5 PVC ATM2/0/0 0 39 QSAAL UP ATM0/0/0 0 16 PVC ATM2/0/0 0 35 ILMI UP ATM0/0/1 0 5 PVC ATM2/0/0 0 40 QSAAL DOWN ATM0/0/1 0 16 PVC ATM2/0/0 0 36 ILMI DOWN ATM0/0/1 4 50 PVC ATM2/0/0 0 230 SNAP DOWN show controller e1 routershow controller e1 E1 5/1 is up. Applique type is Channelized E1 balanced No alarms detected. Framing is NOCRC4, Line Code is HDB3, Clock Source is Line. International Bit: 1, National Bits: 11111 Data in current interval (648 seconds elapsed): 0 Line Code Violations, 0 Path Code Violations 0 Slip Secs, 0 Fr Loss Secs, 0 Line Err Secs, 0 Degraded Mins 0 Errored Secs, 0 Bursty Err Secs, 0 Severely Err Secs, 0 Unavail Secs Total Data (last 24 hours) 0 Line Code Violations, 0 Path Code Violations, 0 Slip Secs, 0 Fr Loss Secs, 0 Line Err Secs, 0 Degraded Mins, 0 Errored Secs, 0 Bursty Err Secs, 0 Severely Err Secs, 0 Unavail Secs show controller e1 輸出分析 E1 5/1 is up 顯示 E1 controller 5/1 正在運(yùn)行 . E1 controller可能是這三種情況： up, down, administratively down. 另外，如果打環(huán)，可以分為本地環(huán)和遠(yuǎn)端環(huán)。如果需要對端口進(jìn)行完全的檢測，可以使用符合標(biāo)準(zhǔn)的短跳線將端口收發(fā)短接構(gòu)成環(huán)。 按次序在每一段打環(huán)，直至找到問題所在點。 觀察環(huán)回測試成功與否，首先看端口有沒有形成環(huán)，如用命令 show interface 看看端口是不是已經(jīng)從 down 狀態(tài)變到 up 狀態(tài)，狀態(tài)中有沒有 “(looped)” 的字樣。 No alarms detected 警告顯示 . 可能的警告有 : 傳輸者發(fā)送遠(yuǎn)端告警 傳輸者正發(fā)送高警指示信息 . 接收者有信號丟失 接收者得到 AIS. 接收者有幀丟失 . 接收者有遠(yuǎn)端告警 接收者沒有告警 Data in current interval (648 seconds elapsed) 顯示當(dāng)前的累積時間，每隔 15分鐘刷新一次。 使用的線纜 CABSSV35MT MSTP 板卡介紹
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