Answer Happy

I am looking for help with configuring this network. I am tryingto configure R1 with interfaces f0/0 and f0/1. However, I am havingtrouble with assigning the correct IP address to use for f0/0. whenI try assigning the address ending in .254 I am getting a badsubnet mask error. If anyone could add some feedback that wouldhelp! As you can I will eventually use EIGRP on R1, butit seems like I'm running into an error when trying to apply thecorrect IP address on the correct interfaces.
I originally tried these commands
conf t
int f0/0
ip add 192.168.1.254 255.255.255.0
but this caused an error
VPCS PC1 192.168.1.1/24 192.168.1.254/24 SW1 VPCS PC2 EIGRP Routing 601 words X English (United States) VPCS PC3 R1 192.168.1.2/24 192.168.1.3/24 172.22.0.254/24 VPCS SW2 S1 172.22.0.10/24 VPCS S2 172.22.0.11/24 Focus Topology Summary PC1 e0 <-> 2 SW1 PC2 e0 <-> 3 SW1 PC3 e0 <-> 4 SW1 R1 f0/0 <-> 1 SW1 f0/1 <-> 1 SW2 S1 e0 <-> 2 SW2 S2 e0 <-> 3 SW2 SW1 1 <-> f0/0 R1 2 <-> e0 PC1 3 <-> e0 PC2 4 <-> e0 PC3 SW2 1 <-> f0/1 R1 2 <> e0 S1 3 <-> e0 S2 Servers... Topology... E 8 x ||||| 8 x I