ZyXEL Communications P-2602HWL-C - Guía de usuario descargar pdf (Pagina 146)

Chapter 9 LAN Setup

P-2602HWUDL-D User’s Guide

146

• Both - the ZyXEL Device will broadcast its routing table periodically and incorporate the

RIP information that it receives.

• In Only - the ZyXEL Device will not send any RIP packets but will accept all RIP packets

received.

• Out Only - the ZyXEL Device will send out RIP packets but will not accept any RIP

packets received.

• None - the ZyXEL Device 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

ZyXEL Device 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.

9.3.3 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.

The address 224.0.0.2 is assigned to the multicast routers group.

The ZyXEL Device supports both IGMP version 1 (IGMP-v1) and IGMP version 2 (IGMP-

v2). At start up, the ZyXEL Device queries all directly connected networks to gather group

membership. After that, the ZyXEL Device periodically updates this information. IP

multicasting can be enabled/disabled on the ZyXEL Device LAN and/or WAN interfaces in

the web configurator (LAN; WA N ). Select None to disable IP multicasting on these

interfaces.

9.3.4 Any IP

Traditionally, you must set the IP addresses and the subnet masks of a computer and the

ZyXEL Device to be in the same subnet to allow the computer to access the Internet (through

the ZyXEL Device). In cases where your computer is required to use a static IP address in

another network, you may need to manually configure the network settings of the computer

every time you want to access the Internet via the ZyXEL Device.

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