User’s Manual
169
The page includes the following fields:
Basic Settings
Object
Description
•
Protocol Version
The STP protocol version setting. Valid values are:
STP
(IEEE 802.1D Spanning Tree Protocol)
RSTP
(IEEE 802.2w Rapid Spanning Tree Protocol)
MSTP
(IEEE 802.1s Multiple Spanning Tree Protocol)
•
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 transition Root and Designated Ports to
Forwarding (used in STP compatible mode). Valid values are in the range 4 to 30
seconds
-Default:
15
-Minimum:
The higher of 4 or [(Max. Message Age / 2) + 1]
-Maximum:
30
•
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.
-Default:
20
-Minimum:
The higher of 6 or [2 x (Hello Time + 1)].
-Maximum:
The lower of 40 or [2 x (Forward Delay -1)]
•
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. 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
Object
Description
•
Edge Port BPDU
Filtering
Control whether a port explicitly configured as Edge will transmit and receive
BPDUs.
•
Edge Port BPDU Guard
Control 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.
Содержание IGS-10020
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