C
HAPTER
4
| Configuring the Switch
Configuring the Spanning Tree Algorithm
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CONFIGURING MIST
INTERFACES
Use the MIST Ports Configuration page to 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. (References to “ports” in this section means
“interfaces,” which includes both ports and trunks.)
PATH
Configuration, Spanning Tree, MSTI Ports
PARAMETERS
These parameters are displayed:
◆ Port – Port identifier.
This field is not applicable to static trunks or dynamic trunks created
through LACP. Also, note that only one set of interface configuration
settings can be applied to all trunks.
◆ Path Cost – This parameter is used by the STA to determine the best
path between devices. Therefore, lower values should be assigned to
ports attached to faster media, and higher values assigned to ports
with slower media. (Path cost takes precedence over port priority.)
By default, the system automatically detects the speed and duplex
mode used on each port, and configures the path cost according to the
values shown in Table 9 , Ta b le 10 and Tab l e 1 1 .
◆ Priority – Defines the priority used for this 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 (i.e., lowest value) will be configured as
an active link in the Spanning Tree. This makes a port with higher
priority less likely to be blocked if the Spanning Tree Algorithm is
detecting network loops. Where more than one port is assigned the
highest priority, the port with lowest numeric identifier will be enabled.
(Range: 0-240, in steps of 16; Default: 128)
WEB INTERFACE
To configure settings for MSTP interfaces:
1. Click Configuration, Spanning Tree, MIST Ports.
2. Modify the required attributes.
3. Click Save.
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