Brocade FastIron Ethernet Switch Platform and Layer 2 Switching Configuration Guide - Manual (Page 375)

1. Access the global CONFIG level of the CLI on FSX-A by entering the following commands.
device-A> enable
No password has been assigned yet...
device-A# configure terminal
device-A(config)#
2. Access the level of the CLI for configuring port-based VLAN 3 by entering the following command.
device-A(config)#
device-A(config)# vlan 3
device-A(config-vlan-3)#
3. From VLAN 3 configuration level of the CLI, enter the following command to enable STP on all
tagged and untagged ports associated with VLAN 3.
device-B(config-vlan-3)#
device-B(config-vlan-3)# spanning-tree
device-B(config-vlan-3)#
4. Enter the following commands to exit the VLAN CONFIG mode and save the configuration to the
system-config file on flash memory.
device-B(config-vlan-3)#
device-B(config-vlan-3)# end
device-B# write memory
device-B#
5. Repeat steps 1 - 4 on FSX-B.
NOTE
You do not need to configure values for the STP parameters. All parameters have default values as
noted below. Additionally, all values will be globally applied to all ports on the system or on the port-
based VLAN for which they are defined.
To configure a specific path-cost or priority value for a given port, enter those values using the key
words in the brackets [ ] shown in the syntax summary below. If you do not want to specify values for
any given port, this portion of the command is not required.
Syntax: vlan vlan-id by port
Syntax: [no] spanning-tree
Syntax: spanning-tree [ ethernet [slotnum/] portnum path-cost value priority value] forward-delay
value hello-time value maximum-age time priority value
Bridge STP parameters (applied to all ports within a VLAN):
• Forward Delay - the period of time a bridge will wait (the listen and learn period) before forwarding
data packets. Possible values: 4 - 30 seconds. Default is 15.
• Maximum Age - the interval a bridge will wait for receipt of a hello packet before initiating a topology
change. Possible values: 6 - 40 seconds. Default is 20.
• Hello Time - the interval of time between each configuration BPDU sent by the root bridge. Possible
values: 1 - 10 seconds. Default is 2.
• Priority - a parameter used to identify the root bridge in a network. The bridge with the lowest value
has the highest priority and is the root. Possible values: 1 - 65,535. Default is 32,678.
Port parameters (applied to a specified port within a VLAN):
• Path Cost - a parameter used to assign a higher or lower path cost to a port. Possible values: 1 -
65535. Default is (1000/Port Speed) for Half-Duplex ports and is (1000/Port Speed)/2 for Full-Duplex
ports.
• Priority - value determines when a port will be rerouted in relation to other ports. Possible values: 0 -
255. Default is 128.
VLANs
FastIron Ethernet Switch Platform and Layer 2 Switching Configuration Guide 375
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