VLAN C
ONFIGURATION
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groups it wants to join. When this switch receives these messages, it will
automatically place the receiving port in the specified VLANs and forward
the message to all other ports. When the message arrives at another switch
that supports GVRP, it will also place the receiving port in the specified
VLANs and pass the message on to all other ports. VLAN requirements
are propagated in this way throughout the network. This allows
GVRP-compliant devices to be automatically configured for VLAN
groups based solely on endstation requests.
To implement GVRP in a network, you must first configure the static
VLANs required on switches that are connected to PCs, servers, and other
devices, so that these VLANs can be propagated across the network
(Web - VLAN/VLAN Static Membership.) For other core switches in the
network, enable GVRP on the links between these devices.
(Web - VLAN/Port Configuration or Trunk Configuration.)
Forwarding Tagged/Untagged Frames
If you want to create a small port-based VLAN for devices attached
directly to a single switch, you can assign ports to the same untagged
VLAN. However, to participate in a VLAN group that crosses several
switches, you need to create a VLAN for that group and enable tagging on
all ports.
Ports can be assigned to multiple tagged or untagged VLANs. Each port
on the switch is therefore capable of passing tagged or untagged frames.
To forward a frame from a VLAN-aware device to a VLAN-unaware
device, the switch first decides where to forward the frame, and then strips
off the VLAN tag. However, to forward a frame from a VLAN-unaware
device to a VLAN-aware device, the switch first decides where to forward
the frame, and then inserts a VLAN tag reflecting this port’s default VID.
Содержание 7500A/VCP - annexe 1
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