SMC Networks 6709L2, Management Manual

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S
PANNING
T
REE
P
ROTOCOL
C
ONFIGURATION
3-37
Field Attributes
• Priority – Defines the priority used for this port in the Spanning Tree
Protocol. 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 Protocol is detecting network
loops. Where more than one port is assigned the highest priority, the
port with lowest numeric identifier will be enabled.
- Default: 128
- Range: 0 - 255
• Path Cost – This parameter is used by STP 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.)
• Full Range: 1-65535
• Recommended Range –
- Ethernet: 50-600
- Fast Ethernet: 10-60
- Gigabit Ethernet: 3-10
• Defaults –
- Ethernet – half duplex: 100; full duplex: 95; trunk: 90
- Fast Ethernet – half duplex: 19; full duplex: 18; trunk: 15
- Gigabit Ethernet – full duplex: 4
Web – Click Administrator=>Spanning Tree. Modify the required
attributes, then click Apply.