configuration has a problem: while the static route is properly defined, IGRP is still sending
updates across the link. In addition, because interface BRI 0 is part of the classful network
10.0.0.0, it is included in routing updates. A simple alteration under the IGRP configuration
remedies the problem, as demonstrated by Example 6-11.
updates out the specified interface.
protocol used. For RIP and IGRP, the operation is the same. These two protocols do not send
updates out the passive interface, although they can receive updates through these interfaces.
with neighboring routers. If the interface is passive, this cannot occur. Therefore routing
updates are neither sent nor received on the passive interface. If the neighbor relationship
cannot be achieved, updates cannot flow.
dynamic routing protocol does not advertise the static route, so reachability can be affected. To
remedy this, the static route can simply be redistributed into the dynamic routing protocol. It is
important that a default metric be assigned in the configuration of the redistribution, or the
routing protocol will not know how to treat the route. Redistribution is beyond our scope at this
time and is not discussed further.
RouterA(config-router)#network 10.0.0.0
!
RouterA(config)#ip route 10.13.1.0 255.255.255.0 10.12.1.2
RouterA(config-router)#network 10.0.0.0
RouterA(config-router)#passive-interface bri 0