HP J9980A User Manual

4-15
Switching Features
Spanning Tree
If you modify these settings, click Apply to save the changes for the current boot session. The changes take
effect immediately.
Root Path Cost The path cost to the designated root bridge. Traffic from a connected device to the root bridge takes
the least-cost path to the bridge. If the value is 0, the cost is automatically calculated based on port
speed.
Root Port The port on the switch with the least-cost path to the designated root bridge in the spanning tree
topology.
Topology Change
Count
The number of times the topology of the spanning tree has changed.
Time Since Last
Change
The time that has passed since the last spanning tree topology change. This value is reset to zero
when the switch is reset.
Loop
Inconsistent State
Identifies whether the interface is currently in a loop-inconsistent state. An interface transitions to
a loop-inconsistent state if loop guard is enabled and the port stops receiving BPDUs. In this state,
the interface does not transmit frames.
Transitions Into
Loop
Inconsistent State
The number of times the port has transitioned into loop inconsistent state.
Transitions Out
Of Loop
Inconsistent State
The number of times this interface has transitioned out of loop-inconsistent state.
Field Description

HP J9980A Specifications

General

Category	Switch
Jumbo Frame Support	Yes
PoE	No
Layer	Layer 2
Operating Temperature	0°C to 40°C (32°F to 104°F)
Storage Temperature	-40°C to 70°C (-40°F to 158°F)
Model	J9980A
Uplink Ports	4
MAC Address Table Size	16, 000 entries
Management	Web, SNMP, CLI
Form Factor	Rack-mountable
Power Supply	Internal
Humidity	5% to 95% (noncondensing)