Enterasys Networks 6H2xx - Manual (Page 365)

Built-in Commands
Network Tools Screens 12-31
set spantree legacypathcost
Description:
Enables or disables the use of 802.1D or 802.1t Path Cost bridging values on
the device. The default is legacy 802.1D standard Path Cost values.
NOTE: When connecting ports between devices, it is
recommended that the devices are all set to run either 802.1D or
802.1t. The path costs must be consistent between bridge ports of
all the devices.
Table 12-2 shows the path cost values when running 802.1t bridging.
Syntax: stpLegacyPathCost [ enable | disable | status]
Options: enable – Enables the device to use spanning tree legacy 802.1D Path Cost
values.
disable – Returns the device to the default setting of using the spanning tree
802.1t Path Cost values.
status – Displays the current status of the Path Cost setting (enabled or
disabled).
* Bridges conforming to IEEE Std 802.1D, 1998 Edition, i.e., that support only 16-bit
values for Path Cost, must use 65,535 as the Path Cost for these link speeds when
used in conjunction with Bridges that support IEEE Std 802.1t (32 bit) Path Cost
values.
Table 12-2 Path Cost Parameter Values
Link
Speed Recommended
Value Recommended
Range Range
10 Mb/s 2,000,000* 200,000-
20,000,000 1-200,000,000
100 Mb/s 200,000* 20,000-
2,000,000 1-200,000,000
1 Gb/s 20,000 2,000- 200,000 1-200,000,000
10 Gb/s 2,000 200-20,000 1-200,000,000