User`s guide

Configuring IP Routing
Managing the routing table
2-24 Preliminary January 30, 1998 Pipeline User’s Guide
RIP=Recv-v2
This setting means that the Pipeline receives RIP-v2 updates from the other
IP router.
If the remote router is running RIP-v1 and the local network is running RIP-
v2, or if you do not want the Pipeline to send or receive RIP updates on this
connection, use the following setting:
RIP=None
5
Close and save the Connection profile.
Route preferences
Route preferences provide additional control over which types of routes take
precedence over others. For each IP address and netmask pair, the routing table
holds one route per protocol, where the protocols are defined as follows:
• Connected routes, such as Ethernet, have a Preference=0.
• Routes learned from ICMP Redirects have a Preference=30.
• Routes placed in the table by SNMP MIB II have a Preference=100.
• Routes learned from RIP have a default Preference=100.
You can modify the default in the Route Preferences submenu of the
Ethernet profile.
• A statically configured IP Route or Connection profile has a default
Preference=100.
When choosing which routes should be put in the routing table, the router first
compares the Preference value, preferring the lower number. If the Preference
values are equal, the router then compares the Metric field, using the route with
the lower Metric.
If multiple routes exist for a given address and netmask pair, the route with the
lower Preference is better. If two routes have the same Preference, then the lower
Metric is better. The best route by these criteria is actually used by the router. The
others remain latent or “hidden,” and are used in case the best route was
removed.
To control route preferences, you can enter a lower (better) preference value
using any of the following parameters: