ProCurve 2610-PWR Technical Information download pdf (Page 70)

GVRP

Introduction

General Operation

When GVRP is enabled on a switch, the VID for any static VLANs configured

on the switch is advertised (using BPDUs—Bridge Protocol Data Units) out

all ports, regardless of whether a port is up or assigned to any particular VLAN.

A GVRP-aware port on another device that receives the advertisements over

a link can dynamically join the advertised VLAN.

A dynamic VLAN (that is, a VLAN learned through GVRP) is tagged on the port

on which it was learned. Also, a GVRP-enabled port can forward an advertise-

ment for a VLAN it learned about from other ports on the same switch (internal

source), but the forwarding port will not itself join that VLAN until an adver-

tisement for that VLAN is received through a link from another device (exter-

nal source) on that specific port

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.

2. Port 1 receives advertise- 4. Port 4 receives advertise-

ment of VIDs 1, 2, & 3 AND ment of VIDs 1, 2, & 3 AND

becomes a member of VIDs becomes a member of VIDs

1, 2, & 3. 1, 2, & 3.

3. Port 3 advertises VIDs 1, 2, 5. Port 5 advertises VIDs 1, 2,

& 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.

Static VLAN con-

figured End Device

Switch 2 Switch 3

GVRP On GVRP On

(NIC or switch) with

GVRP On

4 5

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

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

3-4

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