I am trying to create subinterfaces on some of the ports to allow multiple VLANs on each port. I get an error everytime I try to enter a subinterface in the configure CLI. On other Cisco switches I have, the standard command is: config t int f0/1.x where x is the subinterface.
Can anyone explain why this may not be working?
My end result is to have multiple VLANs on several ports with VLAN tagging.
Any help would be appreciated.
Norm
You don't create sub-interfaces, you create VLAN interfaces. i.e.
interface VLAN 100 ip address 10.1.1.1 255.255.255.0
The configuration model is different on the L3 switch hardware. 3560, 3750, 4500, 6500.
YOu configure the port as a trunk and then confiuure SVIs for each vlan.
conf t
vl 1 vl 2 exit int fa 0/1 switchport sw mode trunk
int vl 1 ip address xxxxx int vl 2 ip address y.y.y.y
done ish.
A few no shuts here and there
Doesn't a trunk have membership to all VLANs? In my case, for example, I may want fa 0/1 to be part of VLAN 2 and 3, fa 0/2 to be part of VLAN 2 and 4, fa 0/3 to be part of vlan 3 only, etc. By making all ports a trunk, I think they belong to all defined VLANs.
Norm
How about something like this.
interface fast0/1 switchport trunk encapsulation dot1q switchport trunk allowed vlan 2-3 switchport mode trunk ! interface fast0/2 switchport trunk encapsulation dot1q switchport trunk allowed vlan 2,4 switchport mode trunk ! interface fast0/3 switchport access vlan 3 switchport mode access
etc.
Not much point in trunking when only one VLAN is needed.
This worked great. Thank you very much for you input!!
Norm
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