- Billion ADSL Modem/Router With Single Ethernet Port User's Manual

 DHCP server enabled with 100 client IP addresses starting from 192.168.1.100.

These parameters should work for the majority of installations. If your ISP gives you explicit

DNS server address(es), read the embedded web configurator help regarding what fields need

to be configured.

4.4.2 IP Address and Subnet Mask

Refer to the IP Address and Subnet Mask section in the Wizard Setup chapter for this

information.

4.4.3 RIP Setup

RIP (Routing Information Protocol) allows a router to exchange routing information with other

routers. The RIP Direction field controls the sending and receiving of RIP packets. When set

to:

1. Both - the BIPAC 5100S will broadcast its routing table periodically and incorporate the RIP

information that it receives.

2. In Only - the BIPAC 5100S will not send any RIP packets but will accept all RIP packets

received.

3. Out Only - the BIPAC 5100S will send out RIP packets but will not accept any RIP packets

received.

4. None - the BIPAC 5100S will not send any RIP packets and will ignore any RIP packets

received.

The Version field controls the format and the broadcasting method of the RIP packets that the

BIPAC 5100S sends (it recognizes both formats when receiving). RIP-1 is universally

supported; but RIP-2 carries more information. RIP-1 is probably adequate for most networks,

unless you have an unusual network topology.

Both RIP-2B and RIP-2M sends the routing data in RIP-2 format; the difference being that

RIP-2B uses subnet broadcasting while RIP-2M uses multicasting.

4.4.4 Multicast

Traditionally, IP packets are transmitted in one of either two ways - Unicast (1 sender - 1

recipient) or Broadcast (1 sender - everybody on the network). Multicast delivers IP packets to

a group of hosts on the network - not everybody and not just 1.

IGMP (Internet Group Multicast Protocol) is a network-layer protocol used to establish

membership in a Multicast group - it is not used to carry user data. IGMP version 2 (RFC 2236)

is an improvement over version 1 (RFC 1112) but IGMP version 1 is still in wide use. If you

would like to read more detailed information about interoperability between IGMP version 2

and version 1, please see sections 4 and 5 of RFC 2236. The class D IP address is used to

identify host groups and can be in the range 224.0.0.0 to 239.255.255.255. The address

224.0.0.0 is not assigned to any group and is used by IP multicast computers. The address

224.0.0.1 is used for query messages and is assigned to the permanent group of all IP hosts

(including gateways). All hosts must join the 224.0.0.1 group in order to participate in IGMP.