Configuring Discontiguous Networks
1. You need to be aware of one more configuration, as listed in Table 4.5, that has to do with
autosummarization:
Without the option of the no auto-summary command for both RIPv2 and EIGRP, discontiguous
networks will never work.
Lab_A#config t
Lab_A(config)#router eigrp 100
Lab_A(config-router)#network 172.16.0.0
Lab_A(config-router)#network 10.0.0.0
Lab_A(config-router)#no auto-summary
Lab_B#config t
Lab_B(config)#router eigrp 100
Lab_B(config-router)#network 172.16.0.0
Lab_B(config-router)#network 10.0.0.0
Lab_B(config-router)#no auto-summary
By using the no auto-summary command, EIGRP will advertise all the subnets between the
two routers. If the networks were larger, you could then provide manual summarization on
these same boundaries.