Quick question for a network ninja....
Say I have four sub-interfaces on a router (not a layer 3 switch). Each interface has already been configured and each sub-int is a /23. Now, the parent interface isn't configured. There isn't an IP address configured at all. I want to know if I can get away with making the parent int a /24 on a totally different subnet since the sub-ints aren't actually part of the parent int network. Not sure if I'm making sense so I will show...
Say these are the sub-interfaces:
-interface FastEthernet1/0.10
-description FacultyVLAN
-encapsulation dot1Q 10
-ip address 10.10.10.1 255.255.254.
-interface FastEthernet1/0.20
-description AdministrativeVLAN
-encapsulation dot1Q 20
-ip address 10.10.12.1 255.255.254.0
-interface FastEthernet1/0.30
-description InstructionalVLAN
-encapsulation dot1Q 30
-ip address 10.10.14.1 255.255.254.0
-interface FastEthernet1/0.40
-description ServerVLAN
-encapsulation dot1Q 40
-ip address 10.10.16.1 255.255.254.0
Am I ok to set the parent FastEthernet port as 10.10.18.1/24? From my understanding the parent interface at this point is only serving as the gateway for those SVIs to get, correct. Need a little help with understanding. Cheers mates!
Just want to make sure that I'm going about this the right way. Cheers!