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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.