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VLAN Management
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PVID A tagged port’s VLAN ID (range is 1 to 4094)
STP Spanning Tree Protocol
Tagged Frame Frame with 802.1Q VLAN tag header
Untagged Frame Frame either without a tag header, or with this header
and with VID = 0
VID VLAN ID (range is 1 to 4095)
VLAN Groups
A VLAN group is the sum total of ports on a switch that are assigned to a
specific VLAN. IntraCore 8000 supports 64 manually-configurable VLANs
on the network. Each switch maintains its own list of VLAN indexes
between 1 and 64. Each VLAN is uniquely identified by a 12-bit (1-4095)
VLAN ID (VID).
VID = 1 is reserved for the default VLAN, and VID 4095 is reserved to
accomodate egress filtering. No two VLANs can have the same VID or
VLAN index if they reside on the same switch.
Two VLANs can have the same VID and VLAN index if they reside on
different switches. To connect VLANs or VLAN groups on different
switches, you must configure a port as an Inter-switch Link (ISL). (See
“Configuring Inter-Switch Links.”)
Default VLAN
The IntraCore 8000 is configured by default with a single VLAN, with
VID = 1; by default, all ports on the switch are assigned to VLAN 1. By
default, the ports are also in the VLAN’s untagged set, which means they
send only untagged frames. The effect is that by default, a port is not limited
by any VLAN boundaries, and strips VLAN data from all frames on egress.
Port VLAN ID
Each port has a Port VLAN ID (PVID), which is used to determine where to
send untagged frames. If the port receives an untagged frame, it passes the
frame to the VLAN identified by the PVID. By default, a port has PVID = 1,
which is the same as the default VID.
If you specify that a port receives untagged and tagged frames, and also
provide a PVID, the port will send all untagged frames to that VLAN. If you
specify that a port drops all untagged frames, that specification sets the
PVID to 4095.
VLAN Port Membership and Untagging