Figure 2-1. .Example of Forwarding Advertisements and Dynamic Joining
switches that can dynamically join the VLANs.
Operating Note: When a GVRP-aware port on a switch learns a VID through GVRP from another device, the switch begins
advertising that VID out all of its ports except the port on which the VID was learned.
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.
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.
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.
Port 6 is statically configured
to be a member of VID 3.
11. Port 2 receives
advertisement of VID 3. (Port
2 is already statically
configured for VID 3.)
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.
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.
6. Port 6 advertises VID 3.
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