PLANET WGSD-8020 - Manual (Page 114)

User’s Manual of WGSD-8020
114
The Basic Settings Table includes the following fields:
Object Description
•
Protocol Version The STP compatibility mode setting. Valid values are:
„ STP
„ RSTP
„ MSTP
• 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 remainingHops 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 4 to 30 seconds, and MaxAge must be <=
(FwdDelay-1)*2 .
• 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.
The Advanced Settings Table includes the following fields:
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.
• Port Error Recovery Control whether a port in the error-disabled state automatically will be enabled
after a certain time. If recovery is not enabled, ports have to be disabled and
re-enabled for normal STP operation. The condition is also cleared by a system
reboot.