From: Rick Burts (burts@xxxxxxxxxxxxxx)
Date: Thu Jan 25 2001 - 12:44:47 GMT-3
Harbir
Cisco has supported subinterfaces on Ethernet (both 10 and 100)
for a long time for protocol IPX. Cisco does not support subinterface
on Ethernet for IP unless the subinterface is trunking (ISL or dot1Q)
which currently requires 100 interface.
Rick
Rick Burts, CCSI CCIE 4615 burts@mentortech.com
Mentor Technologies 240-568-6500 ext 6652
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On Wed, 24 Jan 2001, Harbir Kohli wrote:
> Hello,
>
> When I try to assign an IP address to a subinterface I get the following
> error:
> R1(config-if)#int e0.1
> R1(config-subif)#ip add
> R1(config-subif)#ip address 150.10.10.1 255.255.255.0
>
> 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.
>
> Why?
> I tried 11.2.17, 11.2.23, and 12.0.5, all give the same error.
>
> I know that I have created subinterfaces in the past but what version, I
> don't remember what IOS version that was under.
>
> Is there a workaround?
>
> Also to create an ISL interface do you need fast ethernet ? or can you
> do it with plain 10baseT? How do you do it?
>
> Thanks
>
> harbir
>
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