Configuring VLANs
Defining VLAN Port Assignments
OmniSwitch 6624/6648 Network Configuration Guide
April 2004
page 4-7
Changing the Default VLAN Assignment for a Port
To assign a switch port to a new default VLAN, enter
vlan
followed by an existing VLAN ID number,
port default
, then the slot/port designation. For example, the following command assigns port 5 on slot 2
to VLAN 955:
-> vlan 955 port default 2/5
All ports initially belong to default VLAN 1. When the
vlan port default
command is used, the port’s
default VLAN assignment is changed to the specified VLAN. In the above example, VLAN 955 is now
the default VLAN for port 5 on slot 2 and this port is no longer associated with VLAN 1.
The
vlan port default
command is also used to change the default VLAN assignment for an aggregate of
ports. The link aggregate control number is specified instead of a slot and port. For example, the follow-
ing command assigns link aggregate 10 to VLAN 755:
-> vlan 755 port default 10
For more information about configuring an aggregate of ports, see
Chapter 10, “Configuring Static Link
Aggregation,”
and
Chapter 11, “Configuring Dynamic Link Aggregation.”
Use the
no
form of the
vlan port default
command to remove a default VPA. When this is done, VLAN 1
is restored as the port’s default VLAN.
-> vlan 955 no port default 2/5
Configuring Dynamic VLAN Port Assignment
Configuring the switch to allow dynamic VLAN port assignment requires the following steps:
1
Use the
vlan port mobile
command to enable mobility on switch ports that will participate in dynamic
VLAN assignment. See
Chapter 6, “Assigning Ports to VLANs,”
for detailed procedures.
2
Enable/disable mobile port properties that determine mobile port behavior. See
Chapter 6, “Assigning
Ports to VLANs,”
for detailed procedures.
3
Create VLANs that will receive and forward mobile port traffic. See
“Adding/Removing a VLAN” on
page 4-5
for more information.
4
Configure the method of traffic classification (VLAN rules or tagged VLAN ID) that will trigger
dynamic assignment of mobile ports to the VLANs created in Step 3. See
“Configuring VLAN Rule Clas-
sification” on page 4-8
and
“Enabling/Disabling VLAN Mobile Tag Classification” on page 4-9
.
Once the above configuration steps are completed, dynamic VLAN assignment occurs when a device
connected to a mobile port starts to send traffic. This traffic is examined by switch software to determine
which VLAN should carry the traffic based on the type of classification, if any, defined for a particular
VLAN.
Note that VLAN mobile tag classification takes precedence over VLAN rule classification. If a mobile
port receives traffic that matches a VLAN rule and also has an 802.1Q VLAN ID tag for a VLAN with
mobile tagging enabled, the port is dynamically assigned to the mobile tag VLAN and not the matching
rule VLAN.
See
Chapter 6, “Assigning Ports to VLANs,”
and
Chapter 7, “Defining VLAN Rules,”
for more informa-
tion and examples of dynamic VLAN port assignment.
