I'm trying to break up a /24 subnet for one of my sites in order to create VLANs.
I want to break up 192.168.100.0/24 like this:
192.168.100.1/26 (for 62 hosts)
192.168.100.65/25 (for 126 hosts)
I know there are portions of the subnet left over but I don't need them currently. When trying to configure the router (Cisco 2651XM) for subinterfaces I get the error:
Router(config-subif)#encap dot1q 10
Router(config-subif)#ip address 192.168.100.1 255.255.255.192
Router(config-subif)#encap dot1q 11
Router(config-subif)#ip address 192.168.100.65 255.255.255.128
% 192.168.100.0 overlaps with FastEthernet0/0.10
If I'm using VLSM then the /26 subnet I placed on f0/0.10 would range from 192.168.100.0-63 and would leave the 192.168.100.65 address available to put in a different subnet. What am I missing?