Instruction Manual
66
Change the Spanning Tree settings
The Spanning Tree algorithm enables the switch to cooperate with other bridging
devices by detecting and disabling network loops and providing backup links between
switches, bridges, and routers.
You can access the
Spanning Tree
screen by clicking
Configuration
>
Spanning Tree
>
Bridge Settings
.
Menu option
Description
Basic Settings
Protocol version The STP protocol version setting, the Valid values are STP(IEEE
802.1D) and RSTP(IEEE 802.1w).
Bridge priority
Controls the bridge priority; low numeric values have higher
priority.
Forward delay
The delay used by STP Bridges to transit Root and Designated
Ports to forwarding (used in STP compatible mode). (Range is 4
to 30 seconds.)
Max age
The Maximum age of information transmitted by the Bridge
when it is the Root Bridge. (Range is 6 to 40 seconds.)
Max Age must be ≤ (Forward delay -1) x 2.
Maximum hop
count
This setting defines the initial value of remaining Hops for MSTI
information generated at the boundary of an MSTI region. (Range
is 6 to 40 hops.)
Advanced settings
Edge Port BPDU
filtering
Control whether the 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 BPDUs. The port will enter the error-
disables state and will be removed from the active topology.
Port Error
Recovery
Control whether a port in the error-disable state will
automatically be enabled after a certain time. If recovery is not
enabled, ports have to be disabled and re-enabled from normal
STP operation. The condition is also cleared by a system reboot.
Port Error
Recovery
Timeout
The time to pass before a port in the error-disabled state can be
enabled. (Range is 30 to 86400 seconds.)
