iES22GF User’s Manual
70
iS5 Communications Inc.
Label
Description
Protocol Version
The version of the STP protocol. Valid values include 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). The range of
valid values is 4 to 30 seconds.
Max Age
The maximum time the information transmitted by the root bridge is
considered valid. The range of valid values is 6 to 40 seconds, and
Max
Age
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. The
range of valid values is 4 to 30 seconds, and MaxAge must be <=
(FwdDelay-1)*2.
Transmit Hold Count
The number of BPDUs a bridge port can send per second. When
exceeded, transmission of the next BPDU will be delayed. The range
of valid values is 1 to 10 BPDUs per second.
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.
Port Error Recovery
Timout
The time to pass before a port in the
error-disabled
state can be
enabled. Valid values are between 30 and 86400 seconds (24 hours).
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