beautypg.com

3 mstp – PLANET WGSW-5242 User Manual

Page 76

background image

User’s Manual of WGSW-5242

76

The page includes the following fields:

Object

Description

Port

Indicates the port numbers of the system.

Participate

Indicates if the port is runung RSTP protocol or not.

Cost

Indicates the cost of this port, which means the contribution of this port to the

path cost of paths towards the spanning tree root which include this port.

Priority

Indicates the priority of this port. This is the value of the priority field contained in

the first octect of the Port ID.

Edge

Indicates if this port is the edge port. Once configured as an edge port, the port

state immediately transitions from disable/block to forwarding state.

Root Guard

Indicates if this port is the root guard port. Once configured as a root guard port,

the port can prevent outside swit Displays the RSTP port status.ch with suprior

BID from affecting former topology.

P2P

Indicates if this port is a point-to-point link. If you connect a port to another port

though a point-to-point link and the local port becomes a designated port, it

negotiates a rapid transition with the other port to ensure a loop-free topology.

Status

Displays the RSTP port status.

Role

Displays the role of this RSTP port.

Edit RSTP Port

Property

Click on this button to allow you to configure RSTP port properties.

4.5.3 MSTP

The Multiple Spanning Tree Protocol (MSTP) algorithm and protocol provides simple and full connectivity for frames assigned

to any given VLAN throughout a Bridged Local Area Network comprising arbitrarily interconnected Bridges, each operating

MSTP, STP (Clause 8 of IEEE Std 802.1D, 1998 Edition), or RSTP (Clause 17 of IEEE Std 802.1D,1998 Edition).

MSTP allows frames assigned to different VLANs to follow separate paths, each based on an independent Multiple Spanning

Tree Instance (MSTI)

, within Multiple Spanning Tree (MST) Regions composed of LANs and or MST Bridges. These Regions

and the other Bridges and LANs are connected into a single Common Spanning Tree (CST).