[c-nsp] Terminating lots of double-tagged vlans

[Tom Storey]

Is there a reason you couldnt do something like the following?

encapsulation dot1q 100 second-dot1q 1-4095

Maybe not as "elegant" as the "any" keyword, but it would let you do
routing while covering all of the inner VLAN IDs?


On 23 May 2013 14:25, Simon Lockhart <simon at slimey.org> wrote:

> On Wed Apr 17, 2013 at 12:57:05PM -0700, Bruce Pinsky wrote:
> > Simon Lockhart wrote:
> > > I'm working on a project which uses GPON to connect tens of thousands
> > > of properties in a fibre-to-the-home environment. Each property will
> > > be handed off to me as a double-tagged vlan, one per property.
> > > Obviously I don't want to manually create tens of thousands of
> > > subinterfaces on a router, and I'm sure there's a better way of doing
> > > this.
> >
> >
> http://www.cisco.com/en/US/docs/ios/lanswitch/configuration/guide/lsw_ieee_802.1q.html#wp1027258
> >
>
> Well, I started down this route in the lab, and all was looking promising
> for
> the first ONT, running IPv4, and terminating onto an ASR1k.... IPv6 didn't
> work, and a 2nd ONT wouldn't work.
>
> Then I found the caveat in the documentation - "Only PPPoE is supported on
> ambiguous subinterfaces. Standard IP routing is not supported on ambiguous
> subinterfaces."
>
> PPPoE isn't going to work in our environment, as the ONT won't do it, and
> we're not mandating the use of a CPE router beyond the ONT (the user could
> plug their PC direct into the ONT).
>
> Is there any other way to make "Standard IP routing" work on ambiguous
> subinterfaces - i.e. using the "encapsulation dot1q 101 second-dot1q any"
> configuration syntax?
>
> Thanks in advance,
>
> Simon
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