ZyXEL Communications Internet Security Appliance ZyWALL5UTM 4.0 User Manual page 154

Table 43 Dial Backup (continued)
LABEL
Enable RIP
RIP Version
RIP Direction
Broadcast Dial
Backup Route
Enable Multicast
Multicast Version
PPP Options
PPP Encapsulation
Enable
Compression
Budget
Always On
Configure Budget
Allocated Budget
Period
Idle Timeout
Chapter 7 WAN Screens
DESCRIPTION
Select this check box to turn on RIP (Routing Information Protocol), which allows
a router to exchange routing information with other routers.
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-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. 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 (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.
Select this check box to forward the backup route broadcasts to the WAN.
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.
Select IGMP-v1 or 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.
Select CISCO PPP from the drop-down list box if your dial backup WAN device
uses Cisco PPP encapsulation, otherwise select Standard PPP.
Select this check box to turn on stac compression.
Select this check box to have the dial backup connection on all of the time.
Select this check box to have the dial backup connection on during the time that
you select.
Type the amount of time (in minutes) that the dial backup connection can be used
during the time configured in the Period field. Set an amount that is less than the
time period configured in the Period field.
Type the time period (in hours) for how often the budget should be reset. For
example, to allow calls to this remote node for a maximum of 10 minutes every
hour, set the Allocated Budget to 10 (minutes) and the Period to 1 (hour).
Type the number of seconds of idle time (when there is no traffic from the
ZyWALL to the remote node) for the ZyWALL to wait before it automatically
disconnects the dial backup connection. This option applies only when the
ZyWALL initiates the call. The dial backup connection never times out if you set
this field to "0" (it is the same as selecting Always On).
ZyWALL 5/35/70 Series User's Guide
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