User manual
Table Of Contents
- About This Manual
- 1 VLAN Configuration
- VLAN Overview
- Configuring VLAN
- Creating VLAN
- Creating a VLAN in VLAN Database
- Setting VLAN Name
- Setting VLAN Link Type on Ethernet Interface
- Adding VLAN Member Port
- Adding Ports to a VLAN in Batches
- Setting the Native VLAN for a Trunk or Hybrid Port
- Setting VLAN Filtering on a Port
- Setting Frame Filtering Type of a Port
- Creating VLAN Layer 3 Interface
- VLAN Configuration Example
- Configuring PVLAN
- Configuring QinQ
- Configuring Subnet VLAN
- Configuring Protocol VLAN
- Configuring VLAN Translation
- Configuring SuperVLAN
- VLAN Maintenance and Diagnosis
- 2 SVLAN Configuration
- 3 SVLAN COS Configuration
- 4 ZESR and SVLAN Linkage Networking Configuration
- 5 MAC Address Table Configuration
- Introduction to MAC Address
- Configuring MAC Address Table
- Setting MAC Address Aging Time
- Burning MAC Addresses
- Configuring MAC Address Permanent
- Binding MAC Address to a Port
- Enabling MAC Address Learning
- Limiting MAC Address Count
- Setting MAC Address Learning Protection
- Setting Port Unkown Source MAC Address Filtering
- Setting MAC Address Filtering
- Viewing MAC Address Table
- MAC Address Table Configuration Example
- 6 STP Configuration
- 7 Link Aggregation Configuration
- 8 IGMP Snooping Configuration
- 9 Sflow Configuration
- 10 ZESS Configuration
- 11 Ethernet OAM Configuration
- 12 UDLD Configuration
- 13 LLDP
- 14 L2PT Configuration
- Figures
- Tables
- Glossary
Chapter6STPConguration
Note:
BridgesinanMSTareamushhavesameMSTcongID.Two
bridgeswithsameMSTcongIDareprobablyindifferentMST
area.Forexample,iftwobridgeswiththesameMSTcong
IDareconnectedthroughtheLANofanotherMSTarea,they
shouldbelongtodifferentMSTarea.
MSTareamayhavedifferentspanningtreestructures:Inter-
nalSpanningTree(IST),MST1,MST2andMSTn.EachMSTi
canberegardedasanMSTI.Thebridgeforwardstheframe
withthedesignatedVIDbasedonthepathtowhichtheVID
corresponds.ThemappingbetweenVIDandMSTIisshown
bytheMSTCongID.ThespanningtreestructureofMSTIis
decidedbypriorityparametersconguredbythesystem.
3.MSTInstance
MSTbridgemustsupporttwokindsofinstancesthatisIST
instanceandmultipleMSTinstances.Bydefault,ISTrunsin
anarea.AlltheVLANsareconguredtotheISTbydefault.
ISTconnectsalltheswitchesinthearea.ISTisresponsible
forcommunicationwithotherMSTareasandSSTareasout-
sidethearea.MSTinstancedoesnotsendtheBPDUpacket
independently.Spanningtreeinformationisincludedinthe
M-record,andtransmittedaspartoftheISTBPDUinsidethe
area.
4.CIST
internalISTandexternalCSTofeachMSTareajointlycon-
stituteCommonandInternalSpanningTree(CIST).Itmeans
thatCISTissameasISTinsidetheMSTarea,andCSToutside
theMSTarea.
5.ISTRegionRoot
EachMSTareahasanISTRegionRootswitchwhichhasmin-
imumoverheadfromtheCSTRootpath.WhenCISTRootis
inacertainMSTarea,theCISTRootistheISTRegionRoot
ofthisMSTarea.AftertheISTRegionRootisselected,other
portstowardstheCISTRootintheareawillbeblocked.
6.MSTBPDU
MSTIinsidetheMSTareadoesnotcommunicatewiththeout-
side,whiletheISTexchangesBPDUpacketswiththeoutside.
InsidetheareaMSTIdoesnotsendBPDUpacketsindepen-
dently.MSTBPDUpacketsaresentbytheISTincludesMSTI
information.MSTIusesaagtoshowthereisneedtosend
theMSTBPDUpacket.ISTisresponsibleforsendingpackets.
AllMSTIsthatneedtosendBPDUpacketsplacetheirinforma-
tionintheM-recordstructurewhichissentaspartoftheIST
BPDU.
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