
8 G8264 Application Guide for ENOS 8.4
PVRSTMode ............................ 189
PortStates............................ 190
BridgeProtocolDataUnits ..................... 190
HowBPDUWorks...................... 190
DeterminingthePathforForwardingBPDUs........... 190
SimpleSTPConfiguration..................... 192
Per‐VLANSpanningTreeGroups.................. 194
UsingMultipleSTGstoEliminateFalseLoops.......... 194
VLANsandSTGAssignment .................. 196
ManuallyAssigningSTGs ................... 197
GuidelinesforCreatingVLANs ................. 197
RulesforVLANTagged/TrunkModePorts............ 197
AddingandRemovingPortsfromSTGs............. 198
TheSwitch‐CentricModel ................... 199
ConfiguringMultipleSTGs .................... 200
RapidSpanningTreeProtocol..................... 202
PortStates............................ 202
RSTPConfigurationGuidelines................... 202
RSTPConfigurationExample.................... 203
MultipleSpanningTreeProtocol .................... 204
MSTPRegion........................... 204
CommonInternalSpanningTree.................. 204
MSTPConfigurationGuidelines.................. 205
MSTPConfigurationExamples................... 205
MSTPExample1....................... 205
MSTPExample2....................... 206
PortTypeandLinkType....................... 208
Edge/PortfastPort ........................ 208
LinkType............................ 208
Chapter 12. Virtual Link Aggregation Groups . . . . . . . . . . . . 209
VLAGCapacities ........................... 212
VLAGsversusPortLAGs ....................... 212
ConfiguringVLAGs ......................... 214
BasicVLAGConfiguration ..................... 215
ConfiguringtheISL ...................... 215
ConfiguringtheVLAG..................... 216
VLAGConfiguration‐VLANsMappedtoMSTI ......... 218
ConfiguringHealthCheck................... 221
VLAGswithVRRP........................ 222
Task1:ConfigureVLAGPeer1................. 222
Task2:ConfigureVLAGPeer2................. 225
Two‐tiervLAGswithVRRP .................... 228
vLAGPeerGateway ....................... 229
ConfiguringVLAGsinMultipleLayers ............... 229
Task1:ConfigureLayer2/3borderswitches............ 230
Task2:ConfigureswitchesintheLayer2region. ......... 230
VLAGwithPIM........................... 232
TrafficForwarding ........................ 232
HealthCheck........................... 233