Bay Networks ATMSpeed Spécifications télécharger pdf (Page 59)

9031561 E1 Application Views

4-19

Centillion Common Application

Bridges

Topology Changes

The total number of topology changes detected by this bridge since the

management entity was last reset or initialized.

Designated Root

The bridge identiﬁer of the root of the spanning tree as determined by the

Spanning Tree Protocol as executed by this node. This value is used as the

Root Identiﬁer parameter in all Conﬁguration Bridge Protocol Data Units

(PDUs) originated by this node.

Root Cost

The cost of the path to the root as seen from this bridge.

Root Port

The port number of the port which offers the lowest cost path from this bridge

to the root bridge.

Max Age

The maximum age of Spanning Tree Protocol information learned from the

network on any port before it is discarded, in units of hundredths of a second.

This is the actual value that this bridge is currently using.

Hello Time

The amount of time between the transmission of Conﬁguration bridge PDUs

by this node on any port when it is the root of the spanning tree or trying to

become so, in units of hundredths of a second. This is the actual value that

this bridge is currently using.

Hold Time

This time, in units of hundredths of a second, determines the interval length

during which no more than two Conﬁguration bridge PDUs shall be

transmitted by this node.

Forward Delay

This time value, measured in units of hundredths of a second, controls how

fast a port changes its spanning state when moving towards the Forwarding

state. The value determines how long the port stays in each of the Listening

and Learning states, which precede the Forwarding state. This value is also

used, when a topology change has been detected and is underway, to age all

dynamic entries in the Forwarding Database.

Bridge Max Age

The value that all bridges use for MaxAge when this bridge is acting as the

root. The granularity of this timer is speciﬁed by 802.1D-1990 to be 1 second.

An agent may return a badValue error if a set is attempted to a value which

is not a whole number of seconds.

Bridge Hello Time

The value that all bridges use for HelloTime when this bridge is acting as the

root. The granularity of this timer is speciﬁed by 802.1D-1990 to be 1 second.

An agent may return a badValue error if a set is attempted to a value which

is not a whole number of seconds.

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Bay Networks ATMSpeed Spécifications Page 59

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