Radwin 2000 - Chapter 16: The RADWIN Ethernet Ring; Scope; What Is an Ethernet Ring

RADWIN2000UserManual Release2.8.30 16‐1
Chapter16:
TheRADWINEthernetRing
Scope
ThedescriptionofRADWINEthernetRinginthisChapteriscompletelygeneric:BothWinLink
1000andRADWIN2000linksmayparticipateinanEthernetring.
WhatisanEthernetRing
AnEthernetringconsistsofseveralnodesconnectedbyhops(links).Loopsarenotallowed
withEthernet;thereforeonehopisaRingProtectionLink(RPL)which“blocks”Ethernet
traffic.Intheeventoffailureinthering,theRingProtectionLinkunblocksandEthernet
trafficintheringisrestored.
Someterminology:
•NormalState–allmemberlinksarefunctionalexcepttheRPLwhichisblocked.
•Blocked‐theair‐linkisupbutEthernettrafficisnottransmittedacrossthelink.The
EthernetservicepanelfortheRPLintheRADWINManagerislabeledIdle
•Unblocked‐EthernettrafficistransmittedacrosstheRPL.TheEthernetservicepanel
fortheRPLintheRADWINManagerislabeledActive
•ProtectionState–amemberlinkisbrokenandtheRPLpassesEthernettraffic
•RingProtectionLink‐asdescribedabove
•RingLink‐anymemberlinkcontrolledbytheRPL
• IndependentLink‐notsubjecttoringprotection
Caution
VLANIDsareusedbyRADWINproductsinthreeseparatecontexts:
ManagementVLAN,TrafficVLANandEthernetRing .Itisrecommendedthat
youusedifferentVLANIDsforeachcontext.