The MPLS WG Archive

[Ben Black <ben@layer8.net>]

Then perhaps this is not the solution for you.  However, the fact
that it is not applicable to your particular application does not
make it worthless (this is to be differentiated from drafts
documenting architectures that are applicable to no applications).

Is it inappropriate, in general, for SPs who need to maintain full
Internet tables in their PEs?  Quite likely.

Is it inappropriate, in general, for SPs who have nothing but VPN
customers, each of whom has very few prefixes?  Probably not.

I don't believe anyone has challenged either MOs or your ability to
engineer ISP networks, but perhaps viewing everything through your
ISP goggles is not the most effective way to judge the utility of
all drafts.


Ben

On Thu, Oct 26, 2000 at 09:23:54AM -0700, Randy Bush wrote:
> the problem is that an isp has *many* 'exits' to the internet, like dozens.
> 
> > yes, exactly this. By doing this, the CE is able to learn full Internet
> > routing information without the need to populate the PE with this
> > information. The Internet exit point address needs to be available via the
> > PE router and a default route within the PE VRF has to be available so that
> > any destination that is not covered by a VPN route can be routed based on
> > the default toward the exit point. From a CE perspective, all it needs to
> > do is be able to reach the exit point and advertise its BGP peering address
> > (next-hop) toward the PE router. Jim
> > 
> > At 08:47 26/10/2000 -0400, Paul Doolan wrote:
> > >Jim,
> > >
> > >>Other options include default routing from VPN sites to a
> > >>central site that has Internet connectivity, another is to offload the
> > >>Internet routes from the PE and run direct eBGP sessions from the VPN site
> > >>to the Internet exit point.
> > >
> > >  When you say 'VPN site' here are you suggesting that the CE router is
> > >  running eBGP with/to the 'Internet exit point' ?
> > >
> > >  pd
> > > 
> > 
> > 
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