[c-nsp] Internet in VRF

[Adam Vitkovsky]

If you have the choice I'd definitely recommend Internet in a VRF.
It provides resiliency, fast convergence and plethora of option or great freedom on how to implement internet services (think outside the box).
All this can be done using pure IPv4 routing as well then however the complexity level increases exponentially.

adam
> -----Original Message-----
> From: cisco-nsp [mailto:cisco-nsp-bounces at puck.nether.net] On Behalf Of
> Mike
> Sent: 30 April 2015 17:41
> To: cisco-nsp at puck.nether.net
> Subject: [c-nsp] Internet in VRF
> 
> Hi,
> 
>      I'd like to ask for the collective opinion on routing in service
> provider network serving broadband subscribers:
> 
>      I have an ASR1k and will be terminating PPPoE broadband subscribers
> here. I'll also be terminating my primay internet feed (BGP) here, and I
> the future I will have 3 providers and will be multihomed. I also will
> have some MPLS vpns for certain customers.
> 
>      I think I want to have my default routing table carry mostly
> loopbacks and direct interface connected routes, while I want to stuff
> everything else into VRF's. Those other VRF's are likely to be Internet
> (full tables), Subscribers (all the /32's for PPPoE subscribers), and
> the odd vrf for any mpls vpn customers.  The challenge is that - I think
> - I would want to only leak a default route into any other non-Internet
> VRF that requires shared service access to it, which should keep the
> table sizes down. My question is, does this sound reasonable? Is there
> any reason I wouldn't want to set things up this way?
> 
> Mike-
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