Nortel Networks 214393-A manual 114Chapter 6 Setting up bridging, Spanning Tree tab fields, Field

114Chapter 6 Setting up bridging

Table 43 describes the Spanning Tree tab fields.

Table 43 Spanning Tree tab fields

Field	Description
ProtocolSpecification	Version of the spanning tree protocol being run. Values
	include:
	• decLb100: Indicates the DEC LANbridge 100
	spanning tree protocol.
	• ieee8021d: IEEE 802.1d implementations will return
	this entry. When future versions of the IEEE spanning
	tree protocol are released that are incompatible with
	the current version, a new value will be defined.
Priority	Value of the writable portion of the bridge ID. That is, the
	first two octets of the (8-octet long) bridge ID. The last six
	octets of the bridge ID are given by the value of
	BridgeAddress.
TimeSinceTopologyChange	Time (in hundredths of a second) since the last time a
	topology change was detected by the bridge entity.
TopChanges	Number of topology changes detected by this bridge
	since the management entity was reset or initialized.
DesignatedRoot	Bridge ID of the root of the spanning tree as determined
	by the Spanning Tree Protocol. This is executed by the
	node. This value is used as the Root ID parameter in all
	configuration bridge PDUs originated by the node.
RootCost	Cost of the path to the root as seen from this bridge.
RootPort	Port number of the port that offers the lowest cost path
	from this bridge to the root bridge.
MaxAge	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.
HelloTime	Time between the transmission of Configuration bridge
	PDUs by the node on any port when it is the root of the
	spanning tree (in units of hundredths of a second). This is
	the actual value that the bridge is currently using.

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