Mstp Port Settings - ZyXEL Communications MSC1024G Series User Manual

Table 249 MSTP: Bridge (continued)
LABEL
MSTID
VID
Config Digest

15.10.2 MSTP Port Settings

Click Switch > MSTP > Port to display the configuration screen as shown. Use this screen to
set the MST settings on the switch ports.
Figure 337 MSTP: Port
The following table describes the labels in this screen.
Table 250 MSTP: Port
LABEL
MSTID
Port
Enable
Priority
Path Cost
Edge
MSC1000G/1024G/1224G Series User's Guide
DESCRIPTION
This field displays the ID of an MST instance.
This field displays the VID (or VID ranges) to which the MST instance is mapped.
A configuration digest is generated from the VLAN-MSTI mapping information.
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.
DESCRIPTION
Select an MST region ID from the drop-down list box and click Load to show the
MST region's port settings.
This column lists the management switch card's Gigabit Ethernet interfaces.
Select this option to set the port to be a member of the selected MST region.
When a loop occurs and two ports have the same path cost, the port with a higher
priority (lower numerical value) becomes the root port and the other port becomes
an alternate port.
Specify the port priority in the spanning tree. Enter a number (between 1 and 255).
7Enter a smaller number to have the switch select this port first. If two ports have
the same priority, the switch will select the one with the smallest port ID (which
consists of the port priority and port number).
When a loop occurs, MSTP selects the port with the lowest path cost to the root
bridge.
Specify the path cost (between 0 and 200000000) for the port. Enter a smaller
number to have the switch select this port first. Enter 0 to have to system
automatically determines the path cost based on the link speed. If two ports have
the same path cost, the switch will select the one with the highest priority.
An edge port connects to a non-STP device.
Select this option to set the port as an edge port. The switch immediately sets this
port to the forwarding state when a link failure is detected. This allows for fast
recovery.
Chapter 15 Switch Screens
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