Zte ZXR10 5250-28SM - Figure 5-39 Transmission Link Fault Diagram

ZXR105250SeriesCongurationGuide
link-helloLinkConnectivityDetectionOverview
Figure5-39showsthetransmissionlinkfaultdiagram.SwitchCdoesnothaveadirect
connectionwithswitchD.Theyareinterconnectedwitheachotherthroughtransmission
links.
Whenthetransmissionlinkmarkedinredinthemiddleofthetransmissionlinks
encountersabidirectionalconnectivityfailure,switchCandswitchDarestillinUPstate.
Ifthebidirectionalconnectivitydetectionfunctionisnotenabledforthetransmissionlink,
switchCandswitchDwillnotbeabletoperceivethisfailureandforthisreasonZESR
linkswitchingwillnotbetriggered.
Ifthelink-hellolinkconnectivitydetectionfunctionisenabledontheportsthroughwhich
switchCandswitchDareinterconnectedwitheachother,theseportswillperiodicallysend
link-hellodetectionpacketstoeachother.Ifaportdoesnotreceivethelink-hellodetection
packetfromthepeerportwithinaspeciedtimeperiod,theswitchwillconsiderthisasa
linkfailure.Thedevicewillimmediatelyblocktheportsonthelinkandinformthemaster
nodetoimplementlinkswitching.
Figure5-39TransmissionLinkFaultDiagram
ConguringZESR
TheZESRcongurationincludesthefollowingcommands:
5-110
SJ-20131111172707-002|2013-11-27(R1.0)ZTEProprietaryandCondential