Installation guide

12 ProSwitch

- Xtreme User’s Manual (Managed Models) Page 9
There are system parameters that affect the whole switch. The following system parameters
are available for the Xtreme switch
Parameter Default Range Description
priority 32768 0 - 65535 Specifies the priority value used
along with the switch MAC
address to determine which device
is root. The lower a priority value,
the higher the priority.
maximum-
age
20
seconds
6 – 40
seconds
Maximum received message age
the switch allows for STP
information before discarding the
message,
hello-time 2 seconds 1 - 10 Time between messages
transmitted when the switch is the
root.
forward-
delay
15
seconds
4 – 30
seconds
Time the switch waits before
transitioning from the listening to
the learning state, and between the
learning state to the forwarding
state.
Port Parameters affect individual ports. The following are the port parameters available for
the Xtreme switch
Parameter Default Range Description
path-cost 100 1 - 65535 Assigns an individual port cost
that the switch uses to determine
which ports are the forwarding
ports.
priority 128 0 - 255 Used by STP to determine the
port(s) to use for forwarding. The
port with the lowest number has
the highest priority.
4.3.1 Menu Configuring STP from CMI
The values of the parameters, both currently set and the actual value in use, are displayed in
the menu screen. All the switches participating in the Spanning Tree use the parameters
offered by the root node. The root node is elected by comparing the priority value and the
MAC address of all the nodes participating in the Spanning Tree.
The port parameters are configured from the appropriate port menu.