ZyWALL 2 Series User’s Guide

 

 

Table 6-9 Dial Backup Setup

 

 

 

 

 

LABEL

DESCRIPTION

 

 

 

 

 

 

RIP Version

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

 

 

 

RIP packets that the ZyWALL sends (it recognizes both formats when receiving).

 

 

 

Choose RIP-1,RIP-2B or RIP-2M.

 

 

 

RIP-1is universally supported; but RIP-2carries more information. RIP-1 is

 

 

 

probably adequate for most networks, unless you have an unusual network

 

 

 

topology. Both RIP-2Band RIP-2Msends the routing data in RIP-2 format; the

 

 

 

difference being that RIP-2B uses subnet broadcasting while RIP-2M uses

 

 

 

multicasting. Multicasting can reduce the load on non-router machines since they

 

 

 

generally do not listen to the RIP multicast address and so will not receive the

 

 

 

RIP packets. However, if one router uses multicasting, then all routers on your

 

 

 

network must use multicasting, also.

 

 

RIP Direction

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.

 

 

 

Choose Both, In Only or Out Only.

 

 

 

When set to Both or Out Only, the ZyWALL will broadcast its routing table

 

 

 

periodically.

 

 

 

When set to Both or In Only, the ZyWALL will incorporate RIP information that it

 

 

 

receives.

 

 

Broadcast Dial

Select this check box to forward the backup route broadcasts to the WAN.

 

 

Backup Route

 

 

 

 

 

 

 

Enable Multicast

Select this check box to turn on IGMP (Internet Group Multicast Protocol). IGMP

 

 

 

is a network-layer protocol used to establish membership in a Multicast group - it

 

 

 

is not used to carry user data.

 

 

 

 

 

 

Multicast Version

Select IGMP-v1or IGMP-v2. 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.

 

 

 

 

 

 

PPP Options

 

 

 

 

 

 

 

PPP Encapsulation

Select CISCO PPP from the drop-down list box if your dial backup WAN device

 

 

 

uses Cisco PPP encapsulation, otherwise select Standard PPP.

 

 

Enable Compression

Select this check box to turn on stac compression.

 

 

 

 

 

 

Budget

 

 

 

 

 

 

 

Always On

Select this check box to have the dial backup connection on all of the time.

 

 

 

 

 

WAN Screens

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