[f-nsp] Assigning traffic to different VLLs based on the inner QinQ tag

[David Ball]

  Actually, forget the sniffer.  I know the inner tag is being sent
across the network towards the XMR, because I tested this with other
Juniper gear earlier (no Foundry), and the QinQ worked by simply
pushing an outer tag before sending to the cust/switch.  Just trying
to find out if there's a 'push outer tag' knob I can use on the XMR,
without having to modify tag-types.

David


On 22/04/2008, David Ball <davidtball at gmail.com> wrote:
>  No solution to it yet, though I'm going to open a TAC ticket on it shortly.
>
>  As per the User Configuration guide, the MLX/XMR "supports
> 802.1q-in-q tagging where the inner and outer tag can have different
> or same tag-type values.".  However, the examples therein all indicate
> that the tag-type for the outer should be set to 9100, which I don't
> want to do (because not all of my downstream devices can modify
> tag-type).  I just need it to stick an outer tag on and not touch the
> original.
>   It also indicates in the VLL section that if the endpoint on the
> XMR is tagged, it'll tag the outbound traffic (towards the
> cust/switch) with the associated tag...but never says if or what it
> does to any existing VLAN tag in the original payload.  I'm setting up
> a sniffer now to ensure that I'm actually passing the original tag
> across the network (99% sure I am, cuz I'm not explicitly stripping
> it).
>
> David
>
>
> On 22/04/2008, Andreas Larsen <andreas at larsen.pl> wrote:
> > This is a very interesting question. Have you received any feedback on it ?
> > One very stupid way of doing it would be to untagg towards the XMR or Loop a
> > XMR interface.
> > I know Redback and Ericsson equipment can do this as well.
> >
> > Curious if you received any feedback on this matter.
> >
> > Regards Andreas
> >
> >
> > On Tue, Apr 22, 2008 at 4:31 PM, David Ball <davidtball at gmail.com> wrote:
> > >
> > >  I have a non-Foundry switch connected to an XMR Gig port (running
> > > 3.6.0cT163).  I'm expecting QinQ'd traffic (tag-types will both be
> > > 8100) coming from that switch.  I'm trying to determine how I can
> > > strip off the outer tag, then assign the traffic to different VLLs,
> > > VPLSs, etc. based on the 'inner' tag.  I've read the VLANs section of
> > > the config guide a few times over and either it's not mentioning it,
> > > or I don't 'get' it.  I'm more familiar with Juniper's way of doing
> > > this, which lets you inspect both inner and outer tags, and do
> > > pop/push/swap with the tags, but am struggling to understand how the
> > > XMRs handle things.  Any insight would be appreciated.
> > >  Some (possibly irrelevant) config snippets are below.
> > >
> > > interface ethernet 2/1
> > >  enable
> > >  no spanning-tree
> > >  no flow-control
> > >  gig-default neg-off
> > > !
> > > <snip>
> > >  vll vll-tagged 500 raw-mode
> > >  vll-peer 172.16.0.1
> > >  vlan 500
> > >   tagged e 2/11
> > > <snip>
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> > >
> >
> >
>