Mixing Port-Based And Tagged Vlans; Generic Vlan Registration Protocol - Extreme Networks BlackDiamond 6800 User Manual

M P
IXING ORT
You can configure the BlackDiamond using a combination of port-based and tagged
VLANs. A given port can be a member of multiple VLANs, with the stipulation that
only one of its VLANs uses untagged traffic. In other words, a port can simultaneously
be a member of one port-based VLAN and multiple tag-based VLANs.
For the purposes of VLAN classification, packets arriving on a port with an
802.1Q tag containing a VLANid of zero are treated as untagged.
G
ENERIC
The Generic VLAN Registration Protocol (GVRP) allows a LAN device to signal other
neighboring devices that it wishes to receive packets for one or more VLANs. The
GVRP protocol is defined as part of the IEEE 802.1Q Virtual LANs draft standard. The
main purpose of the protocol is to allow switches to automatically discover some of the
VLAN information that would otherwise have to be manually configured in each
switch. GVRP can also be run by network servers. These servers are usually configured
to join several VLANs, and then signal the network switches of the VLANs of which
they want to be part.
Figure 4-6
Figure 4-6: Network example using GVRP
B D U G
LACK IAMOND SER UIDE
-B T
ASED AND AGGED
VLAN R
EGISTRATION
illustrates a network using GVRP.
1 2 3 4
F32T
GVRP: "Send
me traffic for
VLAN tag 10."
VLAN
S
P
ROTOCOL
System A
VLAN Red,
Tag 10
A B 5 6 7 8
MSM G6X
GVRP: "Send
me traffic for
VLAN tag 10."
GVRP: "Send
me traffic for
VLAN tag 10."
Switch B
T VLAN
YPES OF S
BD_006
4-9