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4 - 110 ONline Ethernet Bridge Module Installation and Operation Guide
These values (the ones imposed by the current Root Bridge) are displayed
with the MONITOR SPANTREE command as the active HELLO_TIME, active
FORWARD_DELAY_TIME, and active LISTEN_TIME.
Table 4-8 describes the SHOW SPANTREE command attributes.
Table 4-8. SHOW SPANTREE Command Attributes
Attribute Description
Bridge Priority The priority of this bridge. The bridge priority is
used with the bridge Ethernet address to
determine which bridge becomes the Root
Bridge in the network.
Path Cost Port1
Path Cost Port2
The value of this parameter determines the path
cost of port 1 or port 2 on the Bridge Module.
The Spanning Tree Protocol seeks to minimize
the path cost between the bridge and the Root
Bridge (called the root path cost). The cost
should be a lower value as the distance between
the bridge and the Root Bridge is lessened.
Hello Time (sec) The rate (in seconds) at which this bridge, when
it is the Root Bridge, will send out a Multicast
address packet (hello packet). This packet is sent
to all other Ethernet Bridges to let them know
the root is still active.
Forward Delay Time
(sec)
The amount of time (in seconds) that bridges will
wait in each Spanning Tree state when moving
from Listening to Forwarding mode when this
bridge is root. The modes that are affected by
this parameter are Listening and Learning.