HP 6120XG HP ProCurve Series 6120 Blade Switches Advanced Traffic Management G - Page 85

GVRP General Operation 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 2. Port 1 receives advertise- 4. Port 4 receives advertise- VLANs (VID= 1, 2, & 3). Port 2 ment of VIDs 1, 2, & 3 AND ment of VIDs 1, 2, & 3 AND is a member of VIDs 1, 2, & 3. becomes a member of VIDs becomes a member of VIDs 1, 2, & 3. 1, 2, & 3. 1. Port 2 advertises VIDs 1, 2, 3. Port 3 advertises VIDs 1, 2, 5. Port 5 advertises VIDs 1, 2, & 3. & 3, but port 3 is NOT a & 3, but port 5 is NOT a member of VIDs 1, 2, & 3 at member of VIDs 1, 2, & 3 at Port 6 is statically configured this point. this point. to be a member of VID 3. Switch 1 GVRP On 2 Switch 2 GVRP On 1 3 Switch 3 GVRP On 4 5 Static VLAN configured End Device (NIC or switch) with GVRP On 6 11. Port 2 receives 9. Port 3 receives advertise- 7. Port 5 receives advertise- 6. Port 6 advertises VID 3. advertisement of VID 3. (Port ment of VID 3 AND becomes ment of VID 3 AND becomes 2 is already statically a member of VID 3. (Still not a member of VID 3. (Still not configured for VID 3.) a member of VIDs 1 & 2.) a member of VIDs 1 & 2.) 10. Port 1 advertises VID 3. 8. Port 4 advertises VID 3. Figure 3-1. Example of Forwarding Advertisements and Dynamic Joining Note that if a static VLAN is configured on at least one port of a switch, and that port has established a link with another device, then all other ports of that switch will send advertisements for that VLAN. For example, in the following figure, Tagged VLAN ports on switch "A" and switch "C" advertise VLANs 22 and 33 to ports on other GVRP-enabled switches that can dynamically join the VLANs. 3-5