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Appendix B: Mapping PVCs to VLANs

RTL867x device supports mapping ATM Permanent Virtual Circuits (PVCs) to VLANs, based

on the ATM bridging standards of RFC 2684. This feature allows an ATM PVC to be configured

as a bridging interface and used in conjunction with a VLAN. The function is supported only

if the device is equipped with a RTL8205SC, which is a 5-port 10/100MBps switch controller.

Figure B.1 illustrates the how the RTL867x device adds a VLAN ID and tag to packets subject

to PVC-VLAN mapping. In this example, vc3 is mapped to VLAN 20. The RTL867x device adds

VLAN ID 20 and tag 8100 to packets from vc3.

ATM

RTL867x

RTL8305S

Ethern

Heade

IP

Heade

DATA

VLAN ID

20

Tag

0x810

Ethern

Heade

IP

Heade

DATA

Ethern

Heade

IP

Heade

DATA

Vc3

VLAN

VLAN

RTL8670

device

Vc3 mapped to VLAN 20

Figure B.1 Adding a VLAN ID and tag to packets