Technical data

RackSwitch G8124 Command Reference
Chapter 2: Information Commands
 49BMD00076, January 2009
The switch software uses the IEEE 802.1D/2004 Rapid Spanning Tree Protocol (RSTP).
The output displays Spanning Tree status (enabled or disabled), and the following Spanning
Tree Group (STG) parameters:
 Priority
 Hello interval
 Maximum age value
 Forwarding delay
You can also view the following port-specific STG information:
 STP port number
 Port alias and priority
 Path Cost
 State
 Role
 Designated Bridge
 Designated Port
 Link Type
The following table describes the STG parameters.
Table 2-16 Spanning Tree Parameter Descriptions
Field Description
Priority
(bridge)
The bridge priority parameter controls which bridge on the network will
become the STG root bridge.
Hello The Hello time parameter specifies, in seconds, how often the root bridge
transmits a configuration Bridge Protocol Data Unit (BPDU). Any bridge
that is not the root bridge uses the root bridge Hello value.
MaxAge The maximum age parameter specifies, in seconds, the maximum time the
bridge waits without receiving a configuration bridge protocol data unit
before it reconfigure the Spanning Tree network.
FwdDel The forward delay parameter specifies, in seconds, the amount of time that a
bridge port has to wait before it changes from learning state to forwarding
state.