Routed Sub-interface on Catalyst 3750

[eric.theodore]

Hi,

I need to make sub-interfaces on a c3750-48TS but not vlan interfaces.

I'm currently unable to type any command like that:

----------------------------------------------------------------

MASTER(config)#int FastEthernet1/0/48
MASTER(config-if)#no switchport
MASTER(config-if)#int FastEthernet1/0/48.100
                       ^
% Invalid input detected at '^' marker.

----------------------------------------------------------------

MASTER(config)#int FastEthernet1/0/48.100
                    ^
% Invalid input detected at '^' marker.

----------------------------------------------------------------

My IOS Version is: c3750-ipservicesk9-mz.122-55.SE1

Any idea ?

Thanks

Regards

[N W]

try this

MASTER(config)#int FastEthernet1/0/48.100

[eric.theodore]

Hi Noel,

Thanks for your answer...

But if you have a breif look of my previous message, i've already tried in the upper config level.

I've the same error message.

Do you have another idea ?

Regards

[Kasiraman S]

Hi Eric,

Cisco 3750 port act as a routed port and behaves like a regular router interface, except that it does not support VLAN subinterfaces

Thanks,

kasi

[N W]

i have a 3750 infront on me running ipbase amd it handles sub - interfaces.

[eric.theodore]

fine,

can you tell me the version of your IOS ?

Does your switch accept the IP vrf XXX command ?

Thanks

[Alvaro Garcia]

Sub-Interfaces are not supported on 3750 switches. You would have to create a trunk port and a Layer 3 VLAN Interface.

http://www.cisco.com/en/US/docs/switches/lan/catalyst3750/software/release/12.2_25_see/configuration/guide/swint.html#wp1640782

Routed Ports

A routed port is a physical port that acts like a port on a router; it does not have to be connected to a router. A routed port is not associated with a particular VLAN, as is an access port. A routed port behaves like a regular router interface, except that it does not support VLAN subinterfaces.