MSS 上的ATM中继(Trunk)是ATM网络上节点间的逻辑连接,是建立在物理连接之上。ATM中继(Trunk)支持DPRS,可以承载帧中继(Frame Relay)业务。通常ATM中继(Trunk)是ATM 接口下一条VC电路。
MSS 上的ATM中继(Trunk)是ATM网络上节点间的逻辑连接,是建立在物理连接之上。ATM中继(Trunk)支持DPRS,可以承载帧中继(Frame Relay)业务。通常ATM中继(Trunk)是ATM 接口下一条VC电路。在Nortel MSS ATM网络内,ATM接口设定为PNNI.而与其它网络连接时,ATM接口设定为IISP.其中VCI和VPI的值时可以随意设定,只要是在允许范围之内。
中继(Trunk)构造和关联的示意图,如下:
> d trk/* Trk/* Use -noTabular to see the many hidden attributes. +=====+-----+----+-----+------+--------------------+----------+-------+----- | Trk |osiAd|osiO|osiUs|snmpOp| remote | spd | rtd | mtu | | min |per | age |erStat| | bit/s| msec|bytes | | | | | us | | | | +=====+-----+----+-----+------+--------------------+----------+-------+----- | 1032|unlck|ena |busy |up |EM/SHSHYJP15K1 | 14490624| 0.5|65512 | | | | | | TRUNK/05232 | | | | 2032|unlck|ena |busy |up |EM/BJBJCQP15K1 | 14490624| 2.3|65512 | | | | | | TRUNK/06232 | | | ok 2006-04-06 23:55:44.41 |
问题一:
ATM中继(Trunk)状态是正常,有流量,但是用户电路无法迂回至此条中继上。
解决思路:
1、首先检查ATM中继(Trunk)的Atmif下是否有PNNI设置,并且在运行状态下正常。检查命令如下:
> d atmif/23 pnni rcc AtmIf/23 Pnni Rcc adminState = unlocked operationalState = enabled usageState = active type = lowestLevelHorizLink negotiatedVersion = version1point0 helloState = twoWayInside remoteNodeId = 28A045861941010104000F000000000090CFF5280028 remoteNodeName = SHSHPP7K02 remotePortId = 655361 remoteInterfaceName = Atmif/10 helloPacketsRx = 24339 helloPacketsTx = 24368 mismatchedHelloPacketsRx = 1 badHelloPacketsRx = 0 ok 2005-04-17 16:34:11.93 |
> d atmif/23 pnni sig AtmIf/23 Pnni Sig adminState = unlocked operationalState = enabled usageState = active lastTxCauseCode = 0 lastTxDiagCode = 00 lastRxCauseCode = 0 lastRxDiagCode = 00 currentConnections = 0 peakConnections = 0 successfulConnections = 0 failedConnections = 0 txPdus = 0 rxPdus = 0 currentPmpConnections = 0 peakPmpConnections = 0 successfulPmpConnections = 0 failedPmpConnections = 0 ok 2005-04-17 16:40:48.87 |
2、如果没有PNNI部件,添加该部件,并激活。命令如下:
3、如果有PNNI部件,但是所显示状态不正常,需要再查看Atmif下VC状态:
> l atmif/200 vcc/* AtmIf/200 Vcc/0.18 ok 2005-04-18 09:48:08.63 |
4、以上结果说明端口上ATM PNNI路由配置正常并加载成功,且产生了VCC/0.18路由控制信道Rcc(RoutingControlChannel)电路,但是没有产生VCC/0.5信令Sig(Signalling)电路。原因是与对端相连接的ATM端口没有配置加载PNNI路由部件。
5、登录到相应的远端交换机上,添加PNNI部件并激活,问题可以解决。
问题二:
正在使用的ATM中继(Trunk)中断,且不可用。
解决思路:
1、检查trunk状态,查看trunk状态是否正常;
2、检查atmif状态,查看atmif状态是否正常;
3、检查板卡状态,查看板卡状态是否正常;
4、检查端口状态,查看端口状态是否正常;
5、对端口进行测试(以OC3为例):
> lock lp/x sdh/y > start lp/x sdh/y test > disp lp/x sdh/y test > d lp/2 sdh/0 test Lp/2 Sdh/0 Test adminState = unlocked operationalState = enabled usageState = idle purpose = ? type = manual frmSize = 1024 bytes frmPatternType = ccitt32kBitPattern customizedPattern = 55555555 Hex dataStartDelay = 0 seconds displayInterval = 5 minutes duration = 1.00 minutes elapsedTime = 1.00 minutes timeRemaining = 0.00 minutes causeOfTermination = testTimeExpired bitsTx = 426614784 bytesTx = 53326848 frmTx = 52077 bitsRx = 426614784 bytesRx = 53326848 frmRx = 52077 ok 2006-04-24 13:15:42.30 |
6、如果bitsTx和bitsRx的值一致,说明网络有物理环路。检查出环路位置,并拆除此环路。
7、如果bitsTx和bitsRx的值不一致,可以在端口上做环路,确保光功率为接收范围为:-8db~-28db,λ=1310.再做测试。bitsTx和bitsRx的值必须一致。否则端口存在问题。
8、检查端口下vc4或pa部件状态,检场是否正常。
> disp lp/x sdh/y vc4/0 或 pa/0 |
9、在atmif下添加测试的vcc电路进行测试,如下:
PROV > add atmif/x vcc/y.yyy test > start atmif/x vcc/y.yyy test |
10、更换本节点中继光端口,例如:从3槽0口移动至4槽1口上:
PROV > disp atmif/30 interfacename atmif/30 interfacename = lp/3 sdh/0 pa/0 或 vc4/0 PROV > set atmif/30 interfacename lp/4 sdh/1 pa/0 或 vc4/0 |
11、登录到远端交换机上,对于相应的中继端口,依据上面1~9的步骤顺序依次检查;
12、更换到新的中继端口;
13、再对有问题的端口和板卡做进一步排查和处理。