Nortel Alteon OS 40M2420 Command Reference Manual page 83

The switch software uses the IEEE 802.1d Spanning Tree Protocol (STP). In addition to seeing
if STG is enabled or disabled, you can view the following STG bridge information:
Priority
Hello interval
Maximum age value
Forwarding delay
Aging time
You can also see the following port-specific STG information:
Slot number
Port alias and priority
Cost
State
The following table describes the STG parameters.
Table 4-16 Spanning Tree Parameter Descriptions
Parameter
Priority (bridge)
Hello
MaxAge
FwdDel
Aging
priority (port)
40M2420, April 2007
Description
The bridge priority parameter controls which bridge on the network will
become the STG root bridge.
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.
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 STG network.
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.
The aging time parameter specifies, in seconds, the amount of time the
bridge waits without receiving a packet from a station before removing the
station from the Forwarding Database.
The port priority parameter helps determine which bridge port becomes the
designated port. In a network topology that has multiple bridge ports con-
nected to a single segment, the port with the lowest port priority becomes the
designated port for the segment.
Alteon OS Command Reference
Chapter 4: The Information Menu 83