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Parameter
Description
Figure 3-4.1: The STP Bridge Configuration
Basic Settings
Protocol Version:
The STP protocol version setting. Valid values are STP, RSTP, and
MSTP.
Bridge Priority:
Controls the bridge priority. Lower numeric values have better
priority. The bridge priority plus the MSTI instance number, concatenated with the 6-
byte MAC address of the switch forms a Bridge Identifier. For MSTP operation, this is
the priority of the CIST. Otherwise, this is the priority of the STP/RSTP bridge.
Forward Delay:
The delay used by STP Bridges to transit Root and Designated Ports
to Forwarding (used in STP compatible mode). Valid values are in the range 4 to 30
seconds.
Max Age:
The maximum age of the information transmitted by the bridge when it is
the root bridge. Valid values are in the range 6 to 40 seconds, and MaxAge must be
<= (FwdDelay-1)*2.
Maximum Hop Count:
This defines the initial value of remaining hops for MSTI
information generated at the boundary of an MSTI region. It defines how many
bridges a root bridge can distribute its BPDU information to. Valid values are in the
range 6 to 40 hops.
Transmit Hold Count:
The number of BPDU's a bridge port can send per second.
When exceeded, transmission of the next BPDU will be delayed. Valid values are in
the range 1 to 10 BPDU's per second.
Advanced Settings
Edge Port BPDU Filtering:
Controls whether a port explicitly configured as “Edge”
will transmit and receive BPDUs.
Edge Port BPDU Guard:
Controls whether a port explicitly configured as “Edge” will
disable itself upon reception of a BPDU. The port will enter the error-disabled state,
and will be removed from the active topology.
