Avaya P580 User Manual page 207

Document No. 650-100-700, Issue 1
Table 7-5. Spanning Tree Port Configuration
Field Definition
Operational Path The path cost that Spanning Tree is using for the port:
Cost
Note:
Multi-Layer tagging is enabled), the operational path
cost is one less than the value in the preceding list.
Configuring Rapid Spanning Tree
• If Administrative Path Cost is set to a nonzero
value, this field displays that nonzero value.
• If Administrative Path Cost is set to 0, the switch
is running Rapid Spanning Tree, and Path Cost
Default for the bridge is set to Rapid-spanning-
tree, then this field displays the following values
(recommended in Table 17-7 of IEEE Std. 802.1w-
2001).
— 10 Mbps port—2,000,000
— 100 Mbps port—200,000
— 1 Gbps port—20,000
— 10 Gbps port—2,500
For hunt groups, this field displays the operational
path cost of one link divided by the number of
links in the hunt group. For example, if a hunt
group comprises four 1-GB ports, and the
operational path cost for one port is 20,000, the
operational path cost for the hunt group is 5,000
÷ )
(20,000 4 .
• If Administrative Path Cost is set to 0 and the
switch is running common Spanning Tree, then this
field displays the following values (regardless of
the Path Cost Default setting):
— For 10 MB ports, 100
— For 100 MB ports, 19
— For 1 GB ports, 4
— For 10 GB ports, 3
If the port is a trunk port (IEEE 802.1q or
For hunt groups, this field displays the operational
path cost of one link minus 1. For example, if a
hunt group comprises four 1-GB ports, and the
operational path cost for one port is four, the
operational path cost of the hunt group is 3 (4 – 1).
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