User's Manual

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 Both means the router will periodically send routing information and accept routing information then
incorporate into routing table.
 IN only means the router will only accept but will not send RIP packet.
 OUT only means the router will only send but will not accept RIP packet.
TCP MTU Option:
Maximum Transmission Unit, the maximum is 1500.
IGMP Proxy: IGMP (Internet Group Multicast Protocol) is a network-layer protocol used to establish
membership in a Multicast group. Choose whether enable IGMP proxy.
IPv6 options (only when choose IPv4/IPv6 or just IPv6 in IP version field above):
IPv6 Address: Type the WAN IPv6 address from your ISP.
Obtain IPv6 DNS: Choose if you want to obtain DNS automatically.
Primary/Secondary: If you choose Disable in the Obtain IPv6 DNS field, please type the exactly primary and
secondary DNS.
MLD Proxy: MLD (Multicast Listener Discovery Protocol) is to IPv6 just as IGMP to IPv4, it is a Multicast
Management protocol for IPv6 multicast packets.