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The following table describes the labels in this screen.
Table 64 Advanced Application > Spanning Tree Protocol > Status: MSTP
LABEL
DESCRIPTION
Configuration
Click Configuration to specify which STP mode you want to activate. Click MSTP to edit
MSTP settings on the Switch.
CST
This section describes the Common Spanning Tree settings.
Bridge
Root refers to the base of the spanning tree (the root bridge). Our Bridge is this Switch.
This Switch may also be the root bridge.
Bridge ID
This is the unique identifier for this bridge, consisting of bridge priority plus MAC address.
This ID is the same for Root and Our Bridge if the Switch is the root switch.
Hello Time
This is the time interval (in seconds) at which the root switch transmits a configuration
(second)
message.
Max Age (second)
This is the maximum time (in seconds) a switch can wait without receiving a
configuration message before attempting to reconfigure.
Forwarding Delay
This is the time (in seconds) the root switch will wait before changing states (that is,
(second)
listening to learning to forwarding).
Cost to Bridge
This is the path cost from the root port on this Switch to the root switch.
Port ID
This is the priority and number of the port on the Switch through which this Switch must
communicate with the root of the Spanning Tree.
Configuration
This field displays the configuration name for this MST region.
Name
Revision Number
This field displays the revision number for this MST region.
Configuration
A configuration digest is generated from the VLAN-MSTI mapping information.
Digest
This field displays the 16-octet signature that is included in an MSTP BPDU. This field
displays the digest when MSTP is activated on the system.
Topology Changed
This is the number of times the spanning tree has been reconfigured.
Times
Time Since Last
This is the time since the spanning tree was last reconfigured.
Change
Instance:
These fields display the MSTI to VLAN mapping. In other words, which VLANs run on each
spanning tree instance.
Instance
This field displays the MSTI ID.
VLAN
This field displays which VLANs are mapped to an MSTI.
MSTI
Select the MST instance settings you want to view.
Bridge
Root refers to the base of the MST instance. Our Bridge is this Switch. This Switch may
also be the root bridge.
Bridge ID
This is the unique identifier for this bridge, consisting of bridge priority plus MAC address.
This ID is the same for Root and Our Bridge if the Switch is the root switch.
Internal Cost
This is the path cost from the root port in this MST instance to the regional root switch.
Port ID
This is the priority and number of the port on the Switch through which this Switch must
communicate with the root of the MST instance.
Port
This field displays the number of the port on the Switch.
Chapter 11 Spanning Tree Protocol
GS3700/XGS3700 Series User's Guide
155
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