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Chapter 11 Routing
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116
11.2
Static Route
The ZyXEL Device usually uses the default gateway to route outbound traffic from
local computers to the Internet. To have the ZyXEL Device send data to devices
not reachable through the default gateway, use static routes.
For example, the next figure shows a computer (
A
) connected to the ZyXEL
Device’s LAN interface. The ZyXEL Device routes most traffic from
A
to the
Internet through the default gateway (
R1
). You create one static route to connect
to services offered by your ISP behind router
R2
. You create another static route
to communicate with a separate network behind a router (
R3
) connected to the
LAN.
Figure 54
Example of Static Routing Topology
Use Interface
To have the ZyXEL Device use a specific WAN interface for sending
traffic to the default gateway, select this option and choose the WAN
interface from the drop-down list box.
Save/Apply
Click this button to save the changes and have the ZyXEL Device start
using them.
Table 40
Advanced Setup > Routing > Default Gateway (continued)
LABEL
DESCRIPTION
WAN
R1
R2
A
R3
LAN
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117
11.3
Configuring Static Route
Click
Advanced > Routing > Static Route
to open the
Static Route
screen.
Figure 55
Advanced > Routing > Static Route
The following table describes the labels in this screen.
11.3.1
Static Route Add
Click
Advanced > Routing > Static Route > Add
to open the following screen.
Use this screen to configure the required information for a static route.
Figure 56
Advanced > Routing > Static Route > Add
Table 41
Advanced > Routing > Static Route
LABEL
DESCRIPTION
Destination
This parameter specifies the IP network address of the final destination.
Routing is always based on network number.
Subnet Mask
This is the IP subnet mask.
Gateway
This is the IP address of the gateway. The gateway is a router or switch
on the same network segment as the device's LAN or WAN port. The
gateway helps forward packets to their destinations.
Interface
If the static route should send traffic through a specific ZyXEL Device
interface, it displays here.
Remove
To remove an entry, select its
Remove
check box and click the
Remove
button.
Add
Click this button to go to a screen where you can configure settings for a
new static route.
Remove
To remove an entry select its
Remove
check box and click the
Remove
button.
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The following table describes the labels in this screen.
Table 42
Advanced > Routing > Static Route > Add
LABEL
DESCRIPTION
Destination
Network
Address
This parameter specifies the IP network address of the final destination.
Routing is always based on network number. If you need to specify a
route to a single host, use a subnet mask of 255.255.255.255 in the
subnet mask field to force the network number to be identical to the host
ID.
IP Subnet
Mask
Enter the IP subnet mask of the destination network here.
Use Gateway
IP Address
If you have a specific gateway IP address to enter, select this option and
enter it in the field provided. The gateway is a router or switch on the
same network segment as the device's LAN or WAN port. The gateway
helps forward packets to their destinations.
Interface
If the static route should send traffic through a specific ZyXEL Device
interface, select this option and choose the interface.
Save/Apply
Click this button to save the changes and have the ZyXEL Device start
using them.
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119
C
HAPTER
12
RIP
This chapter covers configuring the RIP settings for your ZyXEL Device.
12.1
RIP Setup
RIP (Routing Information Protocol, RFC 1058 and RFC 1389) allows a router to
exchange routing information with other routers.
RIP Direction
controls the
sending and receiving of RIP packets. When set to
Both
or
Out Only
, the ZyXEL
Device will broadcast its routing table periodically. When set to
Both
or
In Only
, it
will incorporate the RIP information that it receives; when set to
None
, it will not
send any RIP packets and will ignore any RIP packets received.
RIP Version
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
send 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.
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Chapter 12 RIP
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120
Click
Advanced > Routing > RIP
to open the following screen. Use this screen
to change the ZyXEL Device’s RIP settings.
Figure 57
Advanced Setup > Routing > RIP
The following table describes the labels in this screen.
Table 43
Advanced Setup > Routing > RIP
LABEL
DESCRIPTION
Global RIP Mode
Use these fields to turn RIP on or off for the whole ZyXEL Device.
When you disable RIP, the ZyXEL Device will not send any RIP packets
and will ignore any RIP packets received.
Interface
This field displays the name of the WAN connection.
VPN/VCI
The port (interface), VPI (Virtual Path Identifier) and VCI (Virtual
Channel Identifier) identify the ATM PVC (Permanent Virtual Circuit)
to which these settings apply. “LAN” appears for a bridged connection.
Version
This 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.
Operation
RIP operation controls the sending and receiving of RIP packets. When
set to
Active
the ZyXEL Device periodically broadcasts its routing
table. When set to
Passive
, the ZyXEL Device uses the RIP
information that it receives, but does not broadcast its routing table.
Enabled
Select or clear this field to turn RIP on or off for the interface.
Save/Apply
Click this button to save the changes and have the ZyXEL Device start
using them.

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