Table 11: Recommended Sta Path Cost Range; Table 12: Default Sta Path Costs - Edge-Core ECS3510-26P Management Manual

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: 0-240, in steps of 16
■
Admin 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. Note that path cost takes precedence over
port priority. (Range: 0 for auto-configuration, 1-65535 for the short
path cost method , 1-200,000,000 for the long path cost method)
5
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 below. Path cost "0" is used to indicate auto-configuration
mode. When the short path cost method is selected and the default
path cost recommended by the IEEE 8021w standard exceeds 65,535,
the default is set to 65,535.

Table 11: Recommended STA Path Cost Range

Port Type
Ethernet
Fast Ethernet
Gigabit Ethernet

Table 12: Default STA Path Costs

Port Type
Ethernet
Fast Ethernet
Gigabit Ethernet
Admin Link Type – The link type attached to this interface.
◆
Point-to-Point – A connection to exactly one other bridge.
■
Shared – A connection to two or more bridges.
■
Auto – The switch automatically determines if the interface is
■
attached to a point-to-point link or to shared media. (This is the
default setting.)
5. Refer to "Configuring Global Settings for STA" on page 207
path cost method.
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C
HAPTER
Configuring Interface Settings for STA
IEEE 802.1D-1998
50-600
10-60
3-10
Short Path Cost
(IEEE 802.1D-1998)
65,535
65,535
10,000
| Spanning Tree Algorithm
8
IEEE 802.1w-2001
200,000-20,000,000
20,000-2,000,000
2,000-200,000
Long Path Cost
(802.1D-2004)
1,000,000
100,000
10,000
for information on setting the