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Watson-Ethernet-Manual.doc

Version 3.3-01

Watson Ethernet

Operating Manual

Revision: 2010-01-20

7-21

STP PROTOCOL OFF | STP | RSTP

Enables/disables the STP protocol:

OFF

STP is disabled.

STP

Spanning Tree Protocol (IEEE 802.1D-1998)

RSTP

Rapid Spanning Tree Protocol (IEEE 802.1w and

IEEE 802.1D-2004)

STP PRIORITY prio

Sets the priority of the bridge. Possible values for prio are 0 .. 61440 in incre-

ments of 4096. The bridge priority determines how the root bridge is selected in

a spanning tree.: the root bridge will be the bridge with lowest numerical priority.

STP HELLO time

Sets the Hello time of the bridge. Possible values for time are 1 .. 10 (seconds).

The Hello time determines how often the bridge broadcasts its Hello message to

other bridges. This is also the delay for a port to transition from Blocking into

Learning state in RSTP mode (unless a Rapid Transition takes place)

STP MAXAGE time

Sets the Maximum Age of BPDUs. Possible values for time are 6 .. 40. The age

of a BPDU is incremented by one on each traversal through a bridge. BPDUs

that reach MAXAGE are discarded.

A bridge port that was disabled (e.g. through a reset or a link integrity failure) will

wait MAXAGE seconds before transiting into Learning state.

STP FORWARD time

Sets the Forwarding Delay timer. Possible values for time are 4 .. 30 (seconds).

In STP mode the forwarding delay determines the time before a port will change

from learning to listening and from listening to forwarding states.

STP TXHOLD count

Sets the transmit hold count. Possible values for count are 1.. 10. This is the

maximum number of bridging protocol data units (BPDUs) transmitted per

second.

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