Sitecom DC-227 - Appendix B: Mapping Pvcs to Vlans

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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
E
thern
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