RuggedCom RuggedRouter RX1100 - Manual (Page 52)

5. Configuring Networking
Revision 1.14.3 52 RX1000/RX1100™
assuming that R1 has a route to H2 via R2, R1 will send an ICMP redirection message to H1 informing
it that the route to H2 is via R2. Setting Send ICMP Redirect to "no" will cause the kernel not to send
an ICMP redirect message even if one would normally be sent.
5.3.2. Dummy Interface
Figure 5.3. Dummy Interface
This menu allows you to configure a dummy interface. Normally the router is reachable on any of its
interface addresses, whether the interface is active or not. When OSPF and link detection is used,
inactive interfaces are not advertised to the network and thus not reachable. A dummy interface is
always advertised and is thus reachable. Pressing the Save button will save the configuration change.
Pressing the Delete button will remove the dummy interface.
5.3.3. Static Routes
This menu allows you to configure static routing entries, including default routes. Each static route
specifies how the router can reach a remote subnet. It also allows the conversion of other static routes,
obtained via DHCP for example, to permanently configured static routes.
If IPv6 support is enabled in the Core settings menu, IPv6 static routes may also be configured here.
If multiple gateways are availabe to route to a given remote subnet, a static route entry may be entered
for each one, with the same subnet and different gateway specifications. Typically, one would also
enter a different metric for each route, the lowest metric indicating the preferred route.
Multipath Routes
It is also possible to specify the same metric for each one of several alternative routes to the same
remote subnet. This allows the creation of a multipath route. With such a set of redundant routes
available to a remote subnet, the router will select one or another route to transmit traffic destined
to the subnet.
The end result is that the aggregate of data traffic to the remote subnet is shared among the multiple
routes. Note the distinction between Multipath Routing and
Multilink PPP : whereas Multilink PPP
effectively multiplies the bandwidth for all traffic by the number of links that comprise a 'bundle',
Multipath Routing multiplies the capacity of the route, at link-native speeds, by the number of different
routes provided.
Default Routes
A default route is a special instance of a static route. The destination network of 0.0.0.0/0 is the
most general possible IPv4 network specification. Packets destined to an IPv4 subnet that is not