Mstp; Introduction - Raisecom ISCOM2600G-HI (A) Series Configuration Manual

Raisecom
ISCOM2600G-HI (A) Series Configuration Guide
Checking results
Use the show spanning-tree command to show bridge status.
Take Switch A for example.
SwitchA#show spanning-tree
Spanning-tree admin state: enable
Spanning-tree protocol mode: STP
BridgeId:
Root:
Operational: HelloTime 2, ForwardDelay 15, MaxAge 20
Configured:
Use the show spanning-tree port-list port-list command to show interface status.
Take Switch A for example.
SwitchA#show spanning-tree gigaethernet 1/1/1
GE1/1/1
PortProtocolEnable: admin: enable oper: enable Rootguard: disable
Loopguard: disable
Bpduguard: disable
ExternPathCost:200000
Partner STP Mode: stp
Bpdus send:
Bpdus received:0
State:blocking
Root:
DesignatedBridge: Mac 0000.0000.0000 Priority 0

2.7 MSTP

2.7.1 Introduction

Multiple Spanning Tree Protocol (MSTP) is defined by IEEE 802.1s. Recovering the
disadvantages of STP and RSTP, the MSTP implements fast convergence and distributes
different VLAN flow following its own path to provide an excellent load balancing
mechanism.
MSTP divides a switch network into multiple regions, called MST region. Each MST region
contains several spanning trees but the trees are independent from each other. Each spanning
tree is called a Multiple Spanning Tree Instance (MSTI).
Mac 000E.5E7B.C557 Priority 0
Mac 000E.5E7B.C557 Priority 0
HelloTime 2, ForwardDelay 15, MaxAge 20 TransmitLimit 3
MaxHops 20 Diameter 7
0 (TCN<0> Config<0> RST<0> MST<0>)
(TCN<0> Config<0> RST<0> MST<0>)
Role:non-designated Priority:128
Mac 0000.0000.0000 Priority 0
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RootCost 0
Cost: 200000
RootCost
DesignatedPort
2 Ethernet
0
0
97