ZyXEL Communications GS1900 Hops, State, Bridge, Bridge, Bridge, Change, address, network, Designate, Path Cost, Path Cost, Root Port, Designated, Remanining, Indentifier, Root Bridge

Chapter 13 Monitor: Spanning Tree

Each field is described in the following table.

Table 41 Monitor > Spanning Tree > CIST

LABEL	DESCRIPTION
State	This field displays the state.
Bridge	This is the unique identifier for this bridge, consisting of the bridge priority plus the MAC
Indentifier	address.
Designate	Root bridge refers to the base of the spanning tree.
Root Bridge
External Root	The cost of the path from this bridge to the cist Root Bridge.
Path Cost
Regional Root	Root bridge refers to the base of the spanning tree.
Bridge
Internal Root	The cost of the path from this bridge to the internal Regional Root Bridge.
Path Cost
Designated	For each LAN segment, a designated bridge is selected. This bridge has the lowest cost to the
Bridge	root among the bridges connected to the LAN.
Root Port	On each bridge, the bridge communicates with the root through the root port. The root port is
	the port on this Switch with the lowest path cost to the root (the root path cost). If there is
	no root port, then this Switch has been accepted as the root bridge of the spanning tree
	network.
Remanining	This field displays the number of remanining hops.
Hops
Last Topology	Topology change information is directly propagated throughout the network from the device
Change	that generates the topology change.

13.2.2 CIST Port

Use this screen to view the Switch’s spanning tree CIST port status. Click Monitor > Spanning Tree > CIST Port to access this screen.

Figure 59 Monitor > Spanning Tree > CIST Port

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	GS1900 Series User’s Guide