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Glossary
VPPA:
Glossary 77
Virtual PPA or VPPA: Virtual Interfaces
which are dynamically created by you (using
lanadmin or SAM). The interfaces are
“virtual” because they do not have a unique
hardware instance. A virtual PPA is the PPA
associated with a VLAN.
VLAN: Virtual LAN.VLANs, are a
mechanism to determine which end stations
should receive broadcast traffic, since it
should not be sent arbitrarily to every
connected user. Each packet transmitted by
an end-station is assigned to a VLAN. An
end-station only receives all the multicast
and broadcast traffic on the LANs to which it
belongs, and an end-station receives unicast
traffic addressed to it on the VLAN to which
it belongs.
VLAN-aware: Devices such as switches and
end-stations that can recognize VLAN tags,
but they do not actually interpret them. See
also tag-aware.
VLAN ID: A VLAN ID uniquely identifies
the VLAN to which a frame belongs.
VLAN tag: A 4-byte extension to the MAC
header consisting of a 2-byte VLAN protocol
ID (0x8100) and 2-bytes of tag control
information. VLAN tags enable traffic from
more than one VLAN to use the same port.
VPPA: see Virtual PPA.