|  | 12.4 | IGRP
| 12.4.3 | Enabling IGRP on an IP-addressed network
IGRP is selected as the routing protocol for autonomous system 109. All interfaces connected to networks 1.0.0.0 and 2.0.0.0 will be used to send and receive IGRP routing updates. In the example: router igrp 109 -- selects IGRP as the routing protocol for autonomous system 109 network 1.0.0.0 -- specifies a directly connected network network 2.0.0.0 -- specifies a directly connected network