Foundry NetIron M2404C and M2404F Metro Access Switches
Configuring RSTP (Rev. 03)
Rapid Spanning Tree Protocol (RSTP)
© 2008 Foundry Networks, Inc.
Page 14 of 34
Argument Description
hello-time
The time interval, in seconds, between BPDU transmissions from the ports of
this unit. The range is <1-9> seconds. The default value is 2 seconds.
Setting the RSTP Forward-Delay
The
rapid-spanning-tree forward-delay
command, in Protocol Configuration mode, sets the time
duration in Listening and Learning states that precede the Forwarding state, in seconds. The
no
form of this command resets the default value.
In addition, when a topology change is underway and has been detected, this parameter is used to
age all dynamic entries in the Forwarding database.
By default, the forward delay value is 15 seconds.
NOTE
The user cannot assign forward-delay a value less than MaxAge/2+1.
Command Syntax
device-name
(cfg protocol)#
rapid-spanning-tree forward-delay
<
forward-
delay
>
device-name
(cfg protocol)#
no rapid-spanning-tree forward-delay
Argument Description
forward-delay
The time, in seconds, that the switch stays in each of the Listening and
Learning states that precede the Forwarding State. The default value is 15
seconds. The range is <11-30> seconds.
Setting the RSTP Maximum Aging Time
The
rapid-spanning-tree max-age
command, in Protocol Configuration mode, sets the time in
seconds that learned Rapid Spanning Tree information is kept before being discarded. The
no
form
of this command resets to the default value.
By default, the MaxAge value is 20 seconds, and the range depends on the hello-time and forward-
delay values (between 6 and 28 seconds). See
Setting the RSTP Forward-Delay.
NOTE
The user cannot assign MaxAge a value that is less than 2*(hello-time + 1) or more
than 2*(forward-delay – 1).
Command Syntax
device-name
(cfg protocol)#
rapid-spanning-tree max-age
<
max-age
>
device-name
(cfg protocol)#
no rapid-spanning-tree max-age