Table 26 Rapid Spanning Tree parameter descriptions

Parameter

Description

 

 

MaxAge

The maximum age parameter specifies, in seconds, the maximum time the bridge waits

 

without receiving a configuration bridge protocol data unit before it reconfigures the STP

 

network.

 

 

FwdDel

The forward delay parameter specifies, in seconds, the amount of time that a bridge port

 

has to wait before it changes from learning state to forwarding state.

 

 

Aging

The aging time parameter specifies, in seconds, the amount of time the bridge waits

 

without receiving a packet from a station before removing the station from the Forwarding

 

Database.

 

 

Priority (port)

The port priority parameter helps determine which bridge port becomes the designated

 

port. In a network topology that has multiple bridge ports connected to a single segment,

 

the port with the lowest port priority becomes the designated port for the segment.

 

 

Cost

The port path cost parameter is used to help determine the designated port for a segment.

 

Generally speaking, the faster the port, the lower the path cost. A setting of zero (0)

 

indicates that the cost will be set to the appropriate default after the link speed has been

 

auto-negotiated.

 

 

State

Shows the current state of the port. The State field in RSTP/MSTP mode can be one of the

 

following: Discarding (DISC), Learning (LRN), Forwarding (FWD), or

 

Disabled (DSB).

 

 

Role

Shows the current role of this port in the Spanning Tree. The port role can be one of the

 

following: Designated (DESG), Root (ROOT), Alternate (ALTN), Backup (BKUP), Master

 

(MAST), or Unknown (UNK).

 

 

Designated bridge

Shows information about the bridge connected to each port, if applicable. Information

 

includes the priority (hex) and MAC address of the Designated Bridge.

 

 

Designated port

The port ID of the port on the Designated Bridge to which this port is connected.

 

 

Type

Type of link connected to the port, and whether the port is an edge port. Link type values

 

are AUTO, P2P, or SHARED.

 

MSTP: The Type field appears in /info/cist.

 

 

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