PLANET MGSW-28240F User Manual

Page 161

User’s Manual of MGSW-28240F

‧ Extension – Multiple Spanning Tree Protocol (MSTP) :

Defines an extension to RSTP to further develop the

usefulness of virtual LANs (VLANs). This "Per-VLAN" Multiple Spanning Tree Protocol configures a separate

Spanning Tree for each VLAN group and blocks all but one of the possible alternate paths within each Spanning

Tree.

The STP System Configuration screen in

Figure 4-7-4

appears.

Figure 4-7-4:

STP Bridge Configuration Page Screenshot

The page includes the following fields:

Basic Settings

Object

Description

The STP protocol version setting. Valid values are STP, RSTP and MSTP.



Protocol Version

Controls the bridge priority. Lower numeric values have better priority. The bridge

priority plus the MSTI instance number, concatenated with the 6-byte MAC

address of the switch forms a Bridge Identifier.

For MSTP operation, this is the priority of the CIST. Otherwise, this is the priority

of the STP/RSTP bridge.

 Bridge Priority



Forward Delay

The delay used by STP Bridges to transition Root and Designated Ports to

Forwarding (used in STP compatible mode). Valid values are in the range 4 to 30

seconds

-Default:

-Minimum:

The higher of 4 or [(Max. Message Age / 2) + 1]

-Maximum:

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