[c-nsp] Sub-Interface Support 122.25.SEC 3750

[Alex Foster]

The interface was in switchport access mode..... but you still cant
configure any subinterfaces.... but that aside, Im not sure about not
being able to configure sub-ints on layer3/routed ports, I thought you
could do this, although I guess it may depend on the platform/version.
However, It seems SVIs/Trunks are the way ahead, so many thanks for your
help.

Regards

Alex

-----Original Message-----
From: Bruce Pinsky [mailto:bep at whack.org] 
Sent: 10 October 2005 20:19
To: Alex Foster
Cc: cisco-nsp at puck.nether.net
Subject: Re: [c-nsp] Sub-Interface Support 122.25.SEC 3750

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Alex Foster wrote:
> I Posted this a couple of days ago - and didn't get any feedback - so
> was just wondering if the Cisco guys on the list are aware of this -
and
> whether they have workarounds in place or a fix - I really need the
use
> of VRF with Sub-Interfaces - which would only be available in the SEC
> release - except for some reason the ability to configure
Sub-interfaces
> isn't there.....
> 
> The response you get from the switch is ....
> 
> Switch (config)#int gigabitEthernet 1/0/10.100
>                                ^
> % Invalid input detected at '^' marker.
> 
> 
> "Strange one this, not sure if its been done on purpose or whether the
> software guys have left it out by mistake - but it appears as though
> 122-25.SEC for the 3750 doesn't support sub-interfaces - 122.25.SEB
did,
> but I upgraded to SEC for VRF functionality and found I couldn't
create
> sub-interfaces - rolled back to SEB and there you have it (but no VRF,
> obviously).  Can anyone comment - or I have missed the boat and
someones
> decided that this feature is no longer of any use to anyone..."
> 
> Any help with this would be appreciated .... Regards
> 


Dumb question, but is the interface in switchport access mode?  I seem
to
recall that subinterfaces aren't allowed on "routed" ports.  And VRF
configuration requires that a port be a "routed" (layer 3) port.


http://www.cisco.com/univercd/cc/td/doc/product/lan/cat3750/12225sec/375
0scg/swiprout.htm#wp1319235


- --
=========
bep

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