... IGRP on router1 , router2 , router3 , and router4 . Use AS# 200. router1 (config)# router igrp 200 router1 (config -router) # network 160.10.0.0 router1 (config -router) # network 175.10.0.0 router2 (config)# ... interfaces. router1 (config)# router eigrp 100 router1 (config -router) # network 160.10.0.0 router1 (config -router) # network 175.10.0.0 router2 (config)# router eigrp 100 router2 (config -router) # ... 160.10.0.0 router3 (config)# router eigrp 100 router3 (config -router) # network 175.10.0.0 router3 (config -router) # network 180.10.0.0 router3 (config -router) # network 197.10.1.0 router4 (config)# router...