Chapter 53 Spanning Tree Protocol
XMG1930 Series User’s Guide
352
53.3 Spanning Tree Setup
There are three Auto path-cost Modes (see Table 185 on page 354). Choose the Auto Path-cost Mode
according to the device average link speeds in the STP network.
If most of your devices support high link speed, you should select Long or User-defined mode. The path
cost of link speed slower than 10 Mbps can be set to 2000000, and the path cost of link speed faster than
10 Gbps can be set to 200. This way, the path costs can better reflect actual link speeds with a wider
range (32 bits) of path cost values. If the link speeds within the system are averagely smaller than 1
Gbps, you should select Short mode since Short mode have path cost values more detailed defined for
link speeds under1 Gbps.
The path cost values are described in the following tables.
The Switch defines the following Short mode path costs.
The Switch defines the following Long mode path costs.
If you do not configure the auto path cost values for User-defined mode, the Switch uses the following
default values.
Table 182 Auto Path Cost Mode: Short
LINK SPEED AUTO PATH COST VALUE
Up to 4 Mbps 250
Up to 10 Mbps 100
Up to 16 Mbps 62
Up to 100 Mbps 19
Up to 1 Gbps 4
Up to 10 Gbps 2
More than 10 Gbps 1
Table 183 Auto Path Cost Mode: Long
LINK SPEED AUTO PATH COST VALUE
Up to 10 Mbps 2000000
Up to 100 Mbps 200000
Up to 1 Gbps 20000
Up to 2.5 Gbps 8000
Up to 5 Gbps 4000
Up to 10 Gbps 2000
More than 10 Gbps 200
Table 184 Auto Path Cost Mode: User-defined
LINK SPEED AUTO PATH COST VALUE
Up to 10 Mbps 2000000
Up to 100 Mbps 200000
Up to 1 Gbps 20000
Up to 2.5 Gbps 8000
To Next Page
Loading...
