Foundry NetIron M2404C and M2404F Metro Access Switches
Configuring STP (Rev. 03)
Spanning Tree Protocol (STP)
© 2008 Foundry Networks, Inc.
Page 33 of 38
Figure 12: Spanning Tree Configuration Example
Configuration of Switch A:
1. Enable Spanning Tree Protocol:
SwitchA
#
configure terminal
SwitchA
(config)#
protocol
SwitchA
(cfg protocol)#
spanning-tree enable
2. Set the STP bridge priority to 4096, to make Switch A the Bridge Root.
SwitchA
(cfg protocol)#
spanning-tree priority 4096
3. Set the STP forwarding delay timer to 7. This calculation was done according
to the following formula
Forward_delay = ((4
x
hello) + (3
x
dia)) / 2
, when the
hello-time
is 2 and the diameter is 2, according to
Figure 12
:
SwitchA
(cfg protocol)#
spanning-tree forward-delay 7