Creating/Modifying Vlans; Adding/Removing A Vlan - Alcatel-Lucent OmniSwitch 6850-48 Network Configuration Manual

Creating/Modifying VLANs

Creating/Modifying VLANs
The initial configuration for all Alcatel-Lucent switches consists of a default VLAN 1 and all switch ports
are initially assigned to this VLAN. When a switching module is added to the switch, the module's physi-
cal ports are also assigned to VLAN 1. If additional VLANs are not configured on the switch, then the
entire switch is treated as one large broadcast domain. All ports will receive all traffic from all other ports.
Up to 4094 VLANs are supported per switch, including default VLAN 1. In compliance with the IEEE
802.1Q standard, each VLAN is identified by a unique number, referred to as the VLAN ID. The user
specifies a VLAN ID to create, modify or remove a VLAN and to assign switch ports to a VLAN. When a
packet is received on a port, the port's VLAN ID is inserted into the packet. The packet is then bridged to
other ports that are assigned to the same VLAN ID. In essence, the VLAN broadcast domain is defined by
a collection of ports and packets assigned to its VLAN ID.
The operational status of a VLAN remains inactive until at least one active switch port is assigned to the
VLAN. This means that VLAN properties, such as Spanning Tree or router interfaces, also remain inac-
tive. Ports are considered active if they are connected to an active network device. Non-active port assign-
ments are allowed, but do not change the VLAN's operational state.
Ports are either statically or dynamically assigned to VLANs. When a port is assigned to a VLAN, a
VLAN port association (VPA) is created and tracked by VLAN management switch software. For more
information about VPAs, see
Ports to VLANs."

Adding/Removing a VLAN

To add a VLAN to the switch configuration, enter vlan followed by a unique VLAN ID number between 2
and 4094, an optional administrative status, and an optional description. For example, the following
command creates VLAN 755 with a description:
-> vlan 755 enable name "IP Finance Network"
By default, administrative status and Spanning Tree are enabled when the VLAN is created and the VLAN
ID is used for the description if one is not specified. Note that quotation marks are required if the descrip-
tion contains multiple words separated by spaces. If the description consists of only one word or multiple
words separated by another character, such as a hyphen, then quotes are not required.
You can also specify a range of VLAN IDs with the vlan command. Use a hyphen to indicate a contigu-
ous range and a space to separate multiple VLAN ID entries. For example, the following command creates
VLANs 10 through 15, 100 through 105, and VLAN 200 on the switch:
-> vlan 10-15 100-105 200 name "Marketing Network"
To remove a VLAN from the switch configuration, use the no form of the vlan command.
-> no vlan 755
-> no vlan 100-105
-> no vlan 10-15 200
When a VLAN is deleted, any router interfaces defined for the VLAN are removed and all VLAN port
associations are dropped. For more information about VLAN router interfaces, see
Router Interfaces" on page
Note that up to 253 Spanning Tree instances per switch are supported in the 1x1 Spanning Tree mode.
Since each VLAN with Spanning Tree enabled uses one of these instances, only 253 VLANs can have an
active Spanning Tree instance at any given time.
page 4-6
"Defining VLAN Port Assignments" on page 4-8
4-12.
OmniSwitch AOS Release 6 Network Configuration Guide
Configuring VLANs
and Chapter 6, "Assigning
"Configuring VLAN
September 2009