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<H2>Dynamic Routing Configuration</H2>
<P>
The kernel routing table is maintained by the <VAR>routed</VAR> daemon, 
which communicates with other <VAR>routed</VAR> daemons on the network 
using a variant of the Xerox NS Routing Information Protocol (RIP). 
These systems broadcast information about the networks to which they 
are connected; they also broadcast all the information that they
learn from other daemons. Client systems listen to these broadcasts 
to set up their own routing tables.
</P>
<P>
Use the Dynamic Routing Configuration form to set these parameters:
</P>
<P>
<STRONG>Enable dynamic routing:</STRONG> This selection turns routing
on and off for this system. Select <VAR>Yes</VAR> to turn on dynamic 
routing and <VAR>No</VAR> to turn it off. Typically, any system connected 
to a company intranet that contains more than one network should have 
dynamic routing turned on.
</P>
(Default value: Yes) 
<P>
Note: This is identical to the <I>Enable dynamic routing</I> selection on 
the Gateway Configuration form. You can change the setting from either 
form (your selection is automatically applied to the Gateway Configuration
form to update it).
</P>
(Default value: none)
<P>
<STRONG>Offer default destination for unknown routes:</STRONG> This
selection controls whether this system can route to any destination 
that is not broadcast. Often the Internet gateway system routes packets
from the internal company intranet to the external Internet. If your
system requires this ability, select <VAR>Yes</VAR> to turn on routing 
to external Internet locations; select <VAR>No</VAR> to turn it off.
</P>
(Default value: none)
<P>
<STRONG>Force router to supply network information:</STRONG> By default,
systems with only one network interface do not broadcast routing information. 
Select <VAR>Yes</VAR> to override the default behavior so this system will 
send routing broadcasts.
</P>
(Default value: none)
<P>
<STRONG>Print all inbound and outbound packets to standard output
device:</STRONG> This is a useful option for testing. If you select
<VAR>Yes</VAR>, every routing information packet that this daemon hears 
on the network or that it sends will be printed. You should 
select <VAR>No</VAR> for normal operation.
</P>
(Default value: none)
<P>
<STRONG>Advertise host routes on the primary interface:</STRONG> For
systems with multiple network interfaces, it is often useful to
broadcast a false host route for a network address to other systems 
to reduce the likelihood of routing loops. This broadcasts information 
about all non-primary network interfaces to the network attached to 
the primary interface. For the same behavior on the non-primary network 
interfaces, use the option below.
</P>
(Default value: none)
<P>
<STRONG>Advertise host routes on secondary interfaces:</STRONG>
For systems with multiple network interfaces, it is often useful to
broadcast a false host route for the network address to other machines 
to reduce the likelihood of routing loops. This broadcasts information 
about all interfaces to each network to which the system is connected 
except the primary interface. For the same behavior on the primary 
interface, use the option above.
</P>
(Default value: none)
<P>
<STRONG>Filename for logging routing events:</STRONG> This is a
useful parameter for debugging routing problems. Enter the path 
name for the file in which all routing events will be saved (such 
as /usr/tmp/route.events). Whenever a route is added, deleted, or 
changed, a note about the event is recorded in this file.
</P>
(Default value: none)
<P>
<STRONG>Filter out routes to network <I>Blank</I> and replace with a
default with hop count of:</STRONG> Enter a network interface address
in dotted decimal (such as 1.2.3.4) or hexadecimal (such as 0x01020304) 
notation and a hop count of an integer less than sixteen. The purpose of
this filter is to reduce the propagation of routes to slow links by sending 
a single default route. This is often used on systems connected to slow PPP
links over modem lines to reduce traffic overhead of passing large routing
packets over the link.
</P>
(Default value for hop count: 14)
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