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Foundry Configuration Guide for the FESX, FSX, and FWSX
11 - 20
© Foundry Networks, Inc.
December 2005
VLAN has a virtual routing interface, the virtual routing interface’s IP address is deleted when the ports associated
with the interface are deleted. The rest of the VLAN configuration is retained.
Enable Spanning Tree on a VLAN
The spanning tree bridge and port parameters are configurable using one CLI command set at the Global
Configuration Level of each Port-based VLAN. Suppose you want to enable the IEEE 802.1d STP across VLAN 3.
To do so, use the following method.
NOTE:
When port-based VLANs are not operating on the system, STP is set on a system-wide level at the
global CONFIG level of the CLI.
1.
Access the global CONFIG level of the CLI on FESX-A by entering the following commands:
FESX424 Switch-A> enable
No password has been assigned yet...
FESX424 Switch-A# configure terminal
FESX424 Switch-A(config)#
2.
Access the level of the CLI for configuring port-based VLAN 3 by entering the following command:
FESX424 Switch-A(config)#
FESX424 Switch-A(config)# vlan 3
FESX424 Switch-A(config-vlan-3)#
3.
From VLAN 3’s configuration level of the CLI, enter the following command to enable STP on all tagged and
untagged ports associated with VLAN 3.
FESX424 Switch-B(config-vlan-3)#
FESX424 Switch-B(config-vlan-3)# spanning-tree
FESX424 Switch-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:
FESX424 Switch-B(config-vlan-3)#
FESX424 Switch-B(config-vlan-3)# end
FESX424 Switch-B# write memory
FESX424 Switch-B#
5.
Repeat steps 1 – 4 on FESX-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:
Summary of Contents for FastIron Edge Switch X424
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