General Operation - SMC Networks SMC6624M Management Manual

Configuring Advanced Features
GVRP

General Operation

A GVRP-enabled port with a Tagged or Untagged static VLAN sends advertise-
ments (BPDUs, or Bridge Protocol Data Units) advertising the VLAN (actually,
its VID). Another GVRP-aware port receiving the advertisements over a link
can dynamically join the advertised VLAN. All dynamic VLANs operate as
Tagged VLANs. Also, a GVRP-enabled port can forward an advertisement for
a VLAN it learned about from other ports on the same switch. However, the
forwarding port will not itself join that VLAN until an advertisement for that
VLAN is received on that specific port.
Core switch with static
VLANs (VID= 1, 2, & 3). Port 2
is a member of VIDs 1, 2, & 3.
1.
Port 2 advertises VIDs 1, 2,
& 3.
Switch 1
GVRP On
2
11.
Port 2 receives
advertisement of VID 3. (Port
2 is already statically
configured for VID 3.
Figure 9-57. Example of Forwarding Advertisements and Dynamic Joining
9-74
2.
Port 1 receives advertise-
ment of VIDs 1, 2, & 3 AND
becomes a member of VIDs
1, 2, & 3.
3.
Port 3 advertises VIDs 1, 2,
& 3, but port 3 is NOT a
member of VIDs 1, 2, & 3 at
this point.
Switch 2
GVRP On
3
1
9.
Port 3 receives advertise-
ment of VID 3 AND becomes
a member of VID 3. (Still not
a member of VIDs 1 & 2.)
10.
Port 1 advertises VID 3.
4.
Port 4 receives advertise-
ment of VIDs 1, 2, & 3 AND
becomes a member of VIDs
1, 2, & 3.
5.
Port 5 advertises VIDs 1, 2,
& 3, but port 5 is NOT a
member of VIDs 1, 2, & 3 at
this point.
Switch 3
GVRP On
5
4
7.
Port 5 receives advertise-
ment of VID 3 AND becomes
a member of VID 3. (Still not
a member of VIDs 1 & 2.)
8.
Port 4 advertises VID 3.
Port 6 is statically configured
to be a member of VID 3.
Static VLAN con-
figured End Device
(NIC or switch)
with GVRP On
6
6.
Port 6 advertises VID 3.