Comtrend Corporation AR-5381u User Manual page 94

For example, imagine there are 4 PVCs (0/33, 0/36, 0/37, 0/38). VPI/VCI=0/33 is
for PPPoE while the other PVCs are for IP set-top box (video). The LAN interfaces are
LAN1, LAN2, LAN3 and LAN4.
The Interface Grouping configuration will be:
1. Default: LAN1, LAN2, LAN3 and LAN4
2. Video: nas_0_36, nas_0_37, and nas_0_38. The DHCP vendor ID is "Video".
If the onboard DHCP server is running on "Default" and the remote DHCP server is
running on PVC 0/36 (i.e. for set-top box use only). LAN side clients can get IP
addresses from the CPE's DHCP server and access the Internet via PPPoE (0/33).
If a set-top box is connected to ENET1 and sends a DHCP request with vendor ID
"Video", the local DHCP server will forward this request to the remote DHCP server.
The Interface Grouping configuration will automatically change to the following:
1. Default: LAN1, LAN2, LAN3 and LAN4.
2. Video: nas_0_36, nas_0_37, nas_0_38, and LAN1.
93