
Chapter 3
3-8
For example, to delete the VLAN named yourvlan, type the following
command:
b vlan yourvlan delete
Configuring packet access to VLANs
The BIG-IP supports two methods for sending and receiving packets
through an interface that is a member of one or more VLANs. These two
methods are:
◆ Port-based access to VLANs - Packets are accepted for a VLAN
because the packets have no tags in their headers and were received on an
interface that is a member of a VLAN. With this method, an interface is
configured as an untagged member of the VLAN. Packets sent out
through untagged interfaces contain no tag in their header.
◆ Tag-based access to VLANs - Packets are accepted for a VLAN
because the packets have tags in their headers and the tag matches the
VLAN identification number for the VLAN. With this method, an
interface is configured as a tagged member of the VLAN. Packets sent
out through tagged interfaces contain a tag in their header.
The method used by a VLAN is determined by the way that you add a
member interface to a VLAN. When creating a VLAN or modifying VLAN
properties (using the Configuration utility or the bigpipe command), you
can add an interface to that VLAN as either an untagged or a tagged
interface.
The following two sections describe these two methods of providing packet
access to a VLAN.
Port-based access to VLANs
Port-based access to VLANs occurs when an interface is added to a VLAN
as an untagged interface. In this case, the interface can be added only to that
VLAN and to no others. This limits the interface to accepting traffic only
from that VLAN, instead of from multiple VLANs. To solve this problem,
BIG-IP allows you to configure a feature known as tagging, described in the
following section.
Tag-based access to VLANs
Tag-based access to VLANs occurs when an interface is added to a VLAN
as a tagged interface. A tagged interface can be added to multiple VLANs,
thereby allowing the interface to accept traffic from each VLAN of which
the interface is a member.
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