ZyWALL 2 Series User’s Guide
6-12
WAN Screens
Table 6-7 IP Setup
LABEL
DESCRIPTION
Private (PPPoE and
PPTP only)
This parameter determines if the ZyWALL will include the route to this remote
node in its RIP broadcasts. If set to Yes, this route is kept private and not
included in RIP broadcast. If No, the route to this remote node will be
propagated to other hosts through RIP broadcasts.
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
,
None
,
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.
When set to
None
, the ZyWALL will not send any RIP packets and will ignore
any RIP packets received.
By default,
RIP Direction
is set to
Both
.
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-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. By default, the
RIP Version
field is
set to
RIP-1
.
Multicast
Choose
None
(default),
IGMP-V1
or
IGMP-V2
. 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.
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