FTOS Configuration Guide for the C-Series - Force10 Networks

The only way to remove an interface from the Default VLAN is to place the interface in Default mode by
entering the no switchport command in the INTERFACE mode.
Assigning an IP address to a VLAN
VLANs are a Layer 2 feature. For two physical interfaces on different VLANs to communicate, you must
assign an IP address to the VLANs to route traffic between the two interfaces.
The shutdown command in INTERFACE mode does not affect Layer 2 traffic on the interface; the
shutdown command only prevents Layer 3 traffic from traversing over the interface.
VLAN interfaces do not support SNMP, FTP, or TFTP.
To assign an IP address, use the following command in INTERFACE mode:
Command Syntax Command Mode Purpose
ip address ip-address mask
[secondary]
In FTOS, VLANs and other logical interfaces can be placed in Layer 3 mode to receive and send routed
traffic.
Native VLANs
INTERFACE Configure an IP address and mask on the
interface.
• ip-address mask — Enter an address in
dotted-decimal format (A.B.C.D) and the
mask must be in slash format (/24).
• secondary — This is the interface’s backup
IP address. You can configure up to eight
secondary IP addresses.
Traditionally, physical ports can be either untagged for membership to one VLAN or tagged for
membership to multiple VLANs. An untagged port must be connected to a VLAN-unaware station (one
that does not understand VLAN tags), and a tagged port must be connected to a VLAN-aware station (one
that generates and understands VLAN tags). Native VLAN support breaks this barrier so that a port can be
connected to both VLAN-aware and VLAN-unaware stations. Such ports are referred to as hybrid ports.
Native VLAN is useful in deployments where a Layer 2 port can receive both tagged and untagged traffic
on the same physical port. The classic example is connecting a VOIP phone and a PC to the same port of
the switch. The VOIP phone is configured to generate tagged packets (with VLAN = VOICE VLAN), and
the attached PC generates untagged packets.
To configure a port so that it can be a member of an untagged and tagged VLANs:
Step Task Command Command Mode
1 Remove any Layer 2 or Layer 3 configurations from the interface. INTERFACE
2 Configure the interface for hybrid mode. portmode hybrid INTERFACE
188 Layer 2