EIGRP - Network command syntax

When issuing the EIGRP network command to advertise a directly connected network, it is not necessary to specify the network address with a wildcard mask. It is possible to use a host address when configuring the command. However, when this is done, the command reverts to the network address.

For example, if you issue a network command using the host address with a subnet mask of, you get the following results:

R1(config)#router eigrp 1 R1(config-router)#network R1(config-router)#exit R1(config)#exit R1#show run | section eigrp router eigrp 1 network R1#

Note that the network command that ends up in the running configuration reverts to the network address of that particular host and wildcard mask combination.