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New Member

805 router - need ethernet subinterfaces to have IPs & VLANs


I'm accustomed to dealing with much larger routers and I'm hoping that the 805 router is capable of this.

I want to have 2 sub-interfaces (as the router only has one physical interface), and for each to have a different IP address.

The router goes as far as to let me create the interfaces:

interface Ethernet0

no ip address


interface Ethernet0.1

description LAN


interface Ethernet0.2

description WAN


but when I go into any of the sub-interfaces and try to do 'encapsulation dot1q 3' it says unknown command.

Also when I try to just put on an IP address it gives the following error:

805Router(config-subif)#ip address

% Configuring IP routing on a LAN subinterface is only allowed if that

subinterface is already configured as part of an IEEE 802.10, IEEE 802.1Q,

or ISL vLAN.

So I'm really stuck here.

Any help/suggestions would be greatly appreciated.

The router currently has on c805-sy6-mw.123-22.bin which is IP Plus.

Cisco Employee

Re: 805 router - need ethernet subinterfaces to have IPs & VLANs

Hi Friend,

AFAIK 805 router does not support trunking. However, its successor 870 does provide support for VLAN/802.1q Trunking



New Member

Re: 805 router - need ethernet subinterfaces to have IPs & VLANs

Yes, was afraid of that.


I also tried adding a secondary IP to the interface, but that didn't work either. :-(