Radwin Transportation FiberinMotion - Inter Base Handover (IBHO) Update Message

FinMDeploymentGuide Release4.5.10 3‐9
InterBaseHandover(IBHO)UpdateMessage NetworkGuidelines
3.9InterBaseHandover(IBHO)Update
Message
FiberinMotionprovidesL2connectivity,soallL3features(routingetc.)arehandleddirectly
betweentheon‐boardrouterandthewaysidecorerouter.Theadvantageofthismodeof
operationisthatnoroutingupdatesareneededduringhandovers,facilitatingthecontinuous
fasthandoversneededasthetrainmovesalongthetrack.
However,therewillbeotherL2devices(switches)alongthewa ysidenetworkthatmustbe
updated.
WhenaTMUmovesfromoneTBStothenext,theremustbeanupdateofthewayside
networksotheswitchesknowthenewdatapath.Thisupdateismadebysendinganupdate
messagetothewaysidecorerouter.Howe ver,wedonotwishtosendanupdatemessagefor
eachon‐boarddevice,asthiswilloverloadthesystem.Forthisreason,theupdateissent
regardingonly1device‐theMACaddressoftheon‐boardrouter(sincealltheon‐board
devicesarebehindit,theydonotneedtohaveindividualupdatemessagessent).