Nortel Networks ALTEON OS BMD00007 - Manual (Page 86)

Alteon OS Command Reference
86 „ The Information Menu BMD00007, November 2007
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 4-19 Spanning Tree Parameter Descriptions
Parameter 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 STG 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.
Aging 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.
priority (port) 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.