Comtrend Corporation NexusLink 3120 User Manual page 210

FIXED MTU
Maximum Transmission Unit. The size (in bytes) of largest protocol data unit which
the layer can pass onwards. This value is 1492 for PPPoE.
ENABLE PPP DEBUG MODE
When this option is selected, the system will put more PPP connection information
into the system log. This is for debugging errors and not for normal usage.
BRIDGE PPPOE FRAMES BETWEEN WAN AND LOCAL PORTS
(This option is hidden when PPP IP Extension is enabled)
When Enabled, this creates local PPPoE connections to the WAN side. Enable this
option only if all LAN-side devices are running PPPoE clients, otherwise disable it.
The NexusLink 3120 supports pass-through PPPoE sessions from the LAN side while
simultaneously running a PPPoE client from non-PPPoE LAN devices.
ENABLE MLD MULTICAST PROXY
Multicast Listener Discovery (MLD) is a component of the Internet Protocol Version
6 (IPv6) suite. MLD is used by IPv6 routers for discovering multicast listeners on a
directly attached link, much like IGMP is used in IPv4. The protocol is embedded in
ICMPv6 instead of using a separate protocol.
ENABLE MLD MULTICAST SOURCE
Click to allow use of this WAN interface as Multicast Listener Discovery (MLD)
multicast source.
Enable WAN interface with base MAC
Enable this option to use the router's base MAC address as the MAC address for this
WAN interface.
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