Is it possible to sub-interface a 3750 port channel?

[jkeeffe]

I have a 3750 switch running ipservices 12.2(46)SE and cannot create a sub-interface on a port channel - at least not by using the traditional method with a command like:

config t

int port-channel 1.400

Is there another code train I can use that will allow port channel subinterfaces?

I need to carry two subnets up the portchannel, one of which is a VRF-lite subnet.

[Jerry Ye · Accepted solution]

I don't believe it is possible. You can configure it with trunk and interface VLAN.

int po xx

switchport trunk encap dot1q

switchport mode trunk

int vlan xxxx

ip vrf forwarding RED

ip address x.x.x.x

HTH,

jerry

[glen.grant · Accepted solution]

   Just configure the port channel  as a normal "switch" trunk  as others have said . You are trying to configure it as a router on stick and thats not possible on a L3 switch. 

[andrew.prince · Accepted solution]

AFAIK - you cannot do that, the default port-channel numbering range is 1 to 48 with no option for sub-interfaces.

http://www.cisco.com/en/US/customer/docs/switches/lan/catalyst3750/software/release/12.2_46_se/configuration/guide/scg.html

HTH>