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Configuring Basic Layer 2 Features
December 2005
© Foundry Networks, Inc.
4 - 3
STP must be enabled at the system level to allow assignment of this capability on the VLAN level. On
devices
running Layer 2 code, STP is enabled by default. On devices running Layer 3 code, STP is disabled by default.
To enable STP for all ports on a Foundry device:
FESX424 Switch(config)# spanning tree
Syntax:
[no] spanning-tree
You can also enable and disable spanning tree on a port-based VLAN and on an individual port basis, and enable
advanced STP features. See “Configuring Spanning Tree Protocol (STP) and IronSpan Features” on page 7-1.
Modifying STP Bridge and Port Parameters
You can modify the following STP Parameters:
•
Bridge parameters – forward delay, maximum age, hello time, and priority
•
Port parameters – priority and path cost
For configuration details, see “Changing STP Bridge and Port Parameters” on page 7-5.
Changing the MAC Age Time
By default, learned MAC entries do not age out until they are unused for 300 – 600 seconds. You can change the
MAC age time by entering the following command:
FESX424 Router(config)# mac-age-time 60
Syntax:
[no] mac-age-time <secs>
You can configure 0 or a value from 60 – 600 (seconds), in 60-second intervals. If you set the MAC age time to 0,
aging is disabled.
NOTE:
The actual age time is from one to two times the configured value. For example, if you set the MAC age
time to 60 seconds, learned MAC entries age out after remaining unused for between 60 – 120 seconds.
To display the MAC table, enter the following command:
FESX424 Router(config)# show mac-address
Total active entries from all ports = 3
Total static entries from all ports = 1
MAC-Address Port Type VLAN
1234.1234.1234 15 Static 1
0004.8038.2f24 14 Dynamic 1
0004.8038.2f00 13 Dynamic 1
0010.5a86.b159 10 Dynamic 1
In the output of the
show mac-address
command, the
Type
column indicates whether the MAC entry is static or
dynamic. A static entry is one you create using the
static-mac-address
command. A dynamic entry is one that is
learned by the software from network traffic.
The output of the
show mac-address
command on FESX, FSX, and FWSX devices include an
Index
column
which indicates the index where the entry exists in the hardware MAC table.
Configuring Static MAC Entries
Static MAC addresses can be assigned to Foundry devices.
NOTE:
Foundry devices running Layer 3 code also support the assignment of static IP Routes, static ARP, and
static RARP entries. For details on configuring these types of static entries, see “Configuring Static Routes” on
page 16-32 and “Creating Static ARP Entries” on page 16-28.
Summary of Contents for FastIron Edge Switch X424
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