Lucent Technologies 6000 - Manual (Page 425)

Configuring IP Routing
Configuring IP routes
MAX 6000/3000 Network Configuration Guide 9-61
Dynamic route configuration
You can configure the MAX unit to modify the IP routing table dynamically. To do so, you
must configure each active interface to send or receive RIP or OSPF updates. You can also
configure the Ethernet interface to accept or ignore ICMP redirects.
The Ethernet > Mod Config > Ether Options profile contains several of the parameters for
configuring dynamic route updating:
Parameter Specifies
RIP How the MAX unit handles RIP updates on the Ethernet interface and
on each WAN interface. The RIP parameter in the Ethernet > Answer
> Session Options profile applies to local profiles and profiles
retrieved from RADIUS. Many sites turn off RIP on WAN connections
to keep their routing tables from becoming very large.
Note: The IETF considers RIP-v1 an historic protocol and its use is
no longer recommended. Lucent recommends that you upgrade all
routers to RIP-v2. If you must maintain RIP-v1, Lucent recommends
that you create a separate subnet for all RIP-v1 routers and hosts.
Ignore Def Rt You can configure the MAX to ignore default routes advertised by
routing protocols. This configuration is recommended, because you
typically do not want the default route changed by a RIP update. The
default route specifies a static route to another IP router, which is often
a local router such as a GRF or another kind of LAN router. When you
configure the MAX to ignore the default route, RIP updates do not
modify the default route in the MAX routing table.
RIP Policy If the MAX is running RIP-v1, the RIP Policy parameter specifies a
split-horizon or poison- reverse policy to handle update packets that
include routes that were received on the same interface on which the
update is being sent. Split-horizon means that the MAX does not
propagate routes back to the subnet from which they were received.
Poison-reverse means that it propagates routes back to the subnet from
which they were received, but with a metric of 16.
This parameter has no affect on RIP-v2.
RIP Summary The RIP Summary parameter specifies whether to summarize subnet
information when advertising routes. If the MAX summarizes RIP
routes, it advertises a route to all the subnets in a network of the same
class. For example, the route to 200.5.8.13/28 (a class C address with a
subnet set to 28 bits) would be advertised as a route to 200.5.8.0. If the
MAX does not summarize information, it advertises each route in its
routing table as is. For the subnet in the preceding example, the MAX
would advertise a route only to 200.5.8.13.
This parameter has no affect on RIP-v2.