Multicast - ZyXEL Communications MWR222 - V1.0 Manual

If your ISP assigns you a static WAN IP address, they should also assign you the
subnet mask and DNS server IP address(es) (and a gateway IP address if you use
the Ethernet or ENET ENCAP encapsulation method).
DNS Server Address Assignment
Use Domain Name System (DNS) to map a domain name to its corresponding IP
address and vice versa, for instance, the IP address of www.zyxel.com is
204.217.0.2. The DNS server is extremely important because without it, you
must know the IP address of a computer before you can access it.
The MWR222 can get the DNS server addresses in the following ways.
The ISP tells you the DNS server addresses, usually in the form of an
1
information sheet, when you sign up. If your ISP gives you DNS server
addresses, manually enter them in the DNS server fields.
If your ISP dynamically assigns the DNS server IP addresses (along with
2
the MWR222's WAN IP address), set the DNS server fields to get the DNS
server address from the ISP.
WAN MAC Address
The MAC address screen allows users to configure the WAN port's MAC address
by either using the factory default or cloning the MAC address from a computer
on your LAN. Choose Factory Default to select the factory assigned default MAC
Address.
Otherwise, click Clone the computer's MAC address - IP Address and enter
the IP address of the computer on the LAN whose MAC you are cloning. Once it is
successfully configured, the address will be copied to configuration file. It is
recommended that you clone the MAC address prior to hooking up the WAN Port.

10.3.2 Multicast

Traditionally, IP packets are transmitted in one of either two ways - Unicast (one
sender - one recipient) or Broadcast (one sender - everybody on the network).
Multicast delivers IP packets to a group of hosts on the network - not everybody
and not just one. Multicast is a function that lowers bandwidth needed to stream
media to multiple recipients. Rather than sending a stream for each computer
connected with multicast, one stream is sent and when it reaches its final routing
point the information splits and is sent to all subscribed multicast connections.
MWR222 User's Guide
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