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

Bruce Pinsky bep at whack.org
Wed Apr 17 15:57:05 EDT 2013


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Simon Lockhart wrote:
> All,
> 
> 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.
> 
> What I'd come up with is that I'd "ignore" the inner tags, and just
> use the outer S-Tag to put the properties into subnets (one per
> S-Tag), and then just do DHCP. However, I'm not quite sure how I'd
> achieve this.
> 
> This is obviously a common problem for people to solve, so how do
> others sort it out?
> 
> The devices I'd typically use include Cisco 6500/SUP720, ME3600,
> ASR1k, and smaller stuff like the 3750/3560.
> 

http://www.cisco.com/en/US/docs/ios/lanswitch/configuration/guide/lsw_ieee_802.1q.html#wp1027258


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

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