[AusNOG] dot1q-tunnel and cisco nexus 5000s

[McDonald Richards]

> i cant stack tags on an access port because the 5k drops packets with
>the 802.1q ether type set.


This is probably by design so they can force people to buy N7Ks and OTV
licenses. :)

I'm not sure what other options you'll have on the N5K. Not a fan of them
or their price-point.

Macca



On 21/03/13 5:51 PM, "David Gwynne" <david at gwynne.id.au> wrote:

>mpls is hard in my env because both the hypervisor and the 5ks dont seem
>to support it. mpls seems to be a feature in the same class as q-in-q.
>
>i cant stack tags on an access port because the 5k drops packets with the
>802.1q ether type set.
>
>for me i think the simple solution would be to get the hypervisors to do
>vlans on another ethertype i guess. there appears to be a convention for
>using 0x88A8 to do just that.
>
>dlg
>
>On 21/03/2013, at 4:27 PM, McDonald Richards
><McDonald.Richards at vocus.com.au> wrote:
>
>> MPLS is not that difficult to implement -  and once you have, it's
>>about 3
>> lines of configuration to build an ethernet pseudowire on most devices
>>but
>> this only works well in point to point scenarios.
>> 
>> VPLS can work if you aren't flood too many MACs and you don't want your
>> VPLS PE devices to actually read/interpret/manipulate the tags (lots of
>> feature gap).
>> 
>> If you are doing basic tag stacking in a local area that you have
>>complete
>> control of and your device does not support q-in-q, you can do the good
>> ghetto way and just loop a cable from a trunk/tagged port into an
>> access/untagged port (access port will add a second layer of tags inside
>> that VLAN if it transmits out a trunk port).
>> 
>> Macca
>> 
>> 
>> 
>> On 21/03/13 5:19 PM, "Sean K. Finn" <sean.finn at ozservers.com.au> wrote:
>> 
>>> I, too, am interested in hearing *anyones* opinions of dragging tagged
>>> vlan traffic across a network like this without the use of QinQ.
>>> 
>>> Has anyone had experiencing using other protocols, for example,
>>>Ethernet
>>> over IP, or VPLS or any other of the billion protocol abstractions to
>>> achieve something like this?
>>> 
>>> Does anyone have any *theories* of how to drag VLAN traffic tagged
>>>across
>>> a non QinQ aware switch setup, for example, over layer 3 perhaps?
>>> 
>>> All thoughts welcome.
>>> 
>>> S.
>>> 
>>> -----Original Message-----
>>> From: ausnog-bounces at lists.ausnog.net
>>> [mailto:ausnog-bounces at lists.ausnog.net] On Behalf Of David Gwynne
>>> Sent: Thursday, March 21, 2013 3:02 PM
>>> To: Peter Tiggerdine
>>> Cc: ausnog at lists.ausnog.net
>>> Subject: Re: [AusNOG] dot1q-tunnel and cisco nexus 5000s
>>> 
>>> On 21/03/2013, at 2:54 PM, Peter Tiggerdine <ptiggerdine at gmail.com>
>>>wrote:
>>> 
>>>> Because it's a data centre switch not a services aggregation switch
>>>> with the primary purpose of unified fabric.
>>> 
>>> thats a very arbitrary distinction to me.
>>> 
>>>> What's the use case for q-in-q in datacentres?
>>> 
>>> we wanted to support the provisioning of private networks between
>>>groups
>>> of virtual machines, all hosted in the same DC. it would have been nice
>>> to simply configure the vlan tags on the hypervisors and let them get
>>> tunnelled over the single vlan all the hypervisors are plugged together
>>> with on the 5ks. without q-in-q we need to put the vlans on the
>>>switches,
>>> which is annoying where we are cos we can't arbitrarily allocate tags.
>>> 
>>> dlg
>>> 
>>>> 
>>>> 
>>>> On Thu, Mar 21, 2013 at 2:46 PM, David Gwynne <loki at animata.net>
>>>>wrote:
>>>> does anyone know why q-in-q isnt available on nexus 5000 kit?
>>>> 
>>>> dlg
>>>> _______________________________________________
>>>> AusNOG mailing list
>>>> AusNOG at lists.ausnog.net
>>>> http://lists.ausnog.net/mailman/listinfo/ausnog
>>>> 
>>> 
>>> _______________________________________________
>>> AusNOG mailing list
>>> AusNOG at lists.ausnog.net
>>> http://lists.ausnog.net/mailman/listinfo/ausnog
>>> _______________________________________________
>>> AusNOG mailing list
>>> AusNOG at lists.ausnog.net
>>> http://lists.ausnog.net/mailman/listinfo/ausnog
>> 
>> _______________________________________________
>> AusNOG mailing list
>> AusNOG at lists.ausnog.net
>> http://lists.ausnog.net/mailman/listinfo/ausnog
>