MSS 上的ATM中繼(Trunk)是ATM網(wǎng)絡(luò)上節(jié)點間的邏輯連接,是建立在物理連接之上。ATM中繼(Trunk)支持DPRS,可以承載幀中繼(Frame Relay)業(yè)務(wù)。通常ATM中繼(Trunk)是ATM 接口下一條VC電路。在Nortel MSS ATM網(wǎng)絡(luò)內(nèi),ATM接口設(shè)定為PNNI.而與其它網(wǎng)絡(luò)連接時,ATM接口設(shè)定為IISP.其中VCI和VPI的值時可以隨意設(shè)定,只要是在允許范圍之內(nèi)。
中繼(Trunk)構(gòu)造和關(guān)聯(lián)的示意圖,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
問題一:
ATM中繼(Trunk)狀態(tài)是正常,有流量,但是用戶電路無法迂回至此條中繼上。
解決思路:
1、首先檢查ATM中繼(Trunk)的Atmif下是否有PNNI設(shè)置,并且在運行狀態(tài)下正常。檢查命令如下:
> 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、如果沒有PNNI部件,添加該部件,并激活。命令如下:
PROV> add AtmIf/xx Pnni
3、如果有PNNI部件,但是所顯示狀態(tài)不正常,需要再查看Atmif下VC狀態(tài):
> l atmif/200 vcc/*
AtmIf/200 Vcc/0.18
ok 2005-04-18 09:48:08.63
4、以上結(jié)果說明端口上ATM PNNI路由配置正常并加載成功,且產(chǎn)生了VCC/0.18路由控制信道Rcc(RoutingControlChannel)電路,但是沒有產(chǎn)生VCC/0.5信令Sig(Signalling)電路。原因是與對端相連接的ATM端口沒有配置加載PNNI路由部件。
5、登錄到相應(yīng)的遠端交換機上,添加PNNI部件并激活,問題可以解決。
問題二:
正在使用的ATM中繼(Trunk)中斷,且不可用。
解決思路:
1、檢查trunk狀態(tài),查看trunk狀態(tài)是否正常;
2、檢查atmif狀態(tài),查看atmif狀態(tài)是否正常;
3、檢查板卡狀態(tài),查看板卡狀態(tài)是否正常;
4、檢查端口狀態(tài),查看端口狀態(tài)是否正常;
5、對端口進行測試(以O(shè)C3為例):
> 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,說明網(wǎng)絡(luò)有物理環(huán)路。檢查出環(huán)路位置,并拆除此環(huán)路。
7、如果bitsTx和bitsRx的值不一致,可以在端口上做環(huán)路,確保光功率為接收范圍為:-8db~-28db,λ=1310.再做測試。bitsTx和bitsRx的值必須一致。否則端口存在問題。
8、檢查端口下vc4或pa部件狀態(tài),檢場是否正常。
> disp lp/x sdh/y vc4/0 或 pa/0
9、在atmif下添加測試的vcc電路進行測試,如下:
PROV > add atmif/x vcc/y.yyy test
> start atmif/x vcc/y.yyy test
10、更換本節(jié)點中繼光端口,例如:從3槽0口移動至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、登錄到遠端交換機上,對于相應(yīng)的中繼端口,依據(jù)上面1~9的步驟順序依次檢查;
12、更換到新的中繼端口;
13、再對有問題的端口和板卡做進一步排查和處理。