On a Cisco router/switch running IOS with VLAN capabilities (i.e. 8500) can
a physical interface have an IP address if a subinterface off the same
physical interface has an IP and is actively participating in a VLAN? i.e.

Router(enable)# conf t
Router(config)# interface 1/0
Router(config-if)# ip addr 10.10.10.50 255.255.255.0
Router(config-if)# interface 1/0.1
Router(config-if)# ip address 10.10.10.1 255.255.255.0
Router(config-if)# encapsulation dot1q 15

Are there any problems forthcoming in this setup? I seem to remember there
was, but I have no equipment to verify this.

Thanks!
Sean




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