Dell 5324 - PowerConnect Switch User Manual Addendum page 61

Root — Provides the lowest cost path to forward packets to root device.
Designated — Indicates the port or LAG via which the designated device is attached to the LAN.
Alternate — Provides an alternate path to the root device from the root interface.
Backup — Provides a backup path to the designated port path toward the Spanning Tree leaves. Backup
ports occur only when two ports are connected in a loop by a point-to-point link. Backup ports also occur
when a LAN has two or more connections connected to a shared segment.
Disabled — Indicates the port is not participating in the Spanning Tree.
Interface Priority (0-240,in steps of 16) — Defines the interface priority for specified instance. The default
value is 128.
Path Cost — Indicates the port contribution to the Spanning Tree instance root path cost. If the Long path cost
method was specified in the page, the field value range is 1-200,000,000. If the Short path cost method was
specified, the field value range is 1-65,535.
Default Path Cost — If the Long path cost method was specified in the page, the default path cost values are:
Ethernet (10 Mbps) - 2,000,000
Fast Ethernet (100 Mbps) - 200,000
Gigabit Ethernet (1000 Mbps) - 20,000
Port-Channel - 20,000
If the Short path cost method was specified, the default path cost values are:
Ethernet (10 Mbps) - 100
Fast Ethernet (100 Mbps) - 19
Gigabit Ethernet (1000 Mbps) - 4
Port-Channel - 4
Root — Provides the lowest cost path to forward packets to the root device.
Designated Bridge ID — The bridge ID number that connects the link or shared LAN to the root.
Designated Port ID — The Port ID Number on the designated bridge that connects the link or the shared LAN
to the root.
Designated Cost — Cost of the path from the link or the shared LAN to the root.
Forward Transitions — Number of times the port changed to the forwarding state.
Remain Hops — Indicates the number of hops remaining to the next destination.
Viewing the MSTP Interface Table
1
Open the MSTP Interface Settings page.
2
Click Show All.
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