INS_CNXE2GE2TX8MSPOE 11 Jan 2021 PAGE 33
INSTALLATION AND OPERATION MANUAL
CNXE2GE2TX8MSPOE
TECH SUPPORT: 1.888.678.9427
5.3.4 MSTI Ports
Configure STA attributes for interfaces in a specific MSTI, including path cost, and port priority.
You may use a different priority or path cost for ports of the same media type to indicate the
preferred path.
Label
Description
Port
The port identifier.
Path Cost
As this parameter is used by the STA to determine the best path between
devices, lower values are suggested for ports attached to faster media, and
higher values for ports with slower media. (Path cost takes precedence over port
priority.) The value will control the path cost incurred by the port.
Auto will set the path cost as appropriate by the physical link speed, using the
802.1D recommended values.
Specific will allow you to enter a user-defined value.
Priority
Specify the priority for a port in the Spanning Tree Algorithm. If the path cost
for all ports on a switch are the same, the port with the highest priority (usually
with the lowest value) will be used as an active link in the Spanning Tree. In this
way, a port with higher priority is less likely to be blocked if the Spanning Tree
Algorithm discovers network loops. Where more than one port is assigned the
highest priority, the port with lowest numeric identifier will be enabled.
