This is correct. And my understanding of the reason you can't use subinterfaces here:
With frame relay, we are used to having subinterfaces. They are on the same physical
interface, so if you think about it, something in every frame is telling the router
which subinterface it belongs to. It's something at layer 2, because it needs to work
with all different network protocols. Frame relay has the DLCI, so that works.
With Ethernet subinterfaces, the layer 2 designator among multiple packets would be
the vlan ID. That's why you got the message you did - ethernet subinterfaces only
apply if multiple vlans are coming in on the physical interface. And the vlan
trunking protocol (such as ISL) is what carries the vlan ID in, so it has to be
running on the interface. A protocol like this could be seen on a Fast ethernet, but
not an ethernet.
>>> Reinhold Fischer <[EMAIL PROTECTED]> 08/31 7:55 PM >>>
Hi Nova, Hi Group,
you probably have to use a secondary ip-address on the interface instead
the subinterface.
int e0
ip address <ip> <mask> secondary
To get rid of the subinterface entirely you have to reload the router
(not 100% sure of this but we will see the other replies ;)
hth
Reinhold
--
Reinhold Fischer
CCNP/SCSA/HP Certified Consultant for Network Management
On Thu, 31 Aug 2000, Nova Rich wrote:
> hey guys,
>
> I was wondering how to apply subinterfaces. I have 1 ether port on my router
> (1600) and need 2 links to the switch. One for public IP and the other for
> private IP.
>
> I type in "int e0.1", then "ip add x.x.x.x mask" but I get this instead,
>
> "Configuring IP routing on a LAN subinterface is only allowed if that
> subinterface is already configured as part of an IEEE 802.10 or ISL vLAN."
>
> I don't know why this won't work and further more I can't seem to remove the
> subinterface. I type in (no int e0.1) but I still see the interface when I
> do a (sh ip in b).
>
> "Ethernet0.1 unassigned YES manual deleted
> down"
>
> It's marked as deleted but how do I get rid of it entirely?
>
> How do I configure subinterfaces and how do I remove them?
>
> NovaRich
>
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