[c-nsp] Conditional BGP

[Stephen Kratzer]

IMHO, it's best to offer three options to the customer, full routes, partial 
routes, or a default route only. That is, say "Here are three possible 
configurations, which one do you want?"

On Tuesday 23 September 2008 09:13:25 Paul Stewart wrote:
> Thank you ... so really the best solution for us to offer is what we
> already do - full table.
>
> Also, since we support a full list of communities the customer has complete
> control over when/where they get advertised.  Or a simple approach for the
> customers would be heavy prepending and low local-pref (which would keep
> the traffic down but not zero due to our peering etc).
>
> Thanks very much,
>
> Paul
>
>
> -----Original Message-----
> From: Stephen Kratzer [mailto:kratzers at pa.net]
> Sent: September 23, 2008 9:00 AM
> To: cisco-nsp at puck.nether.net
> Cc: Paul Stewart
> Subject: Re: [c-nsp] Conditional BGP
>
> On Tuesday 23 September 2008 08:37:56 Paul Stewart wrote:
> > Hi folks..
> >
> >
> >
> > We have a couple of customers that are looking to purchase an Internet
> > connection from us - this will be a BGP feed to each customer as they are
> > multihomed today etc.
> >
> >
> >
> > Normally, we would just supply a full table and let them decide what to
> > do with it.  In this scenario, they both wish to use us as a backup
> > provider and wish to ONLY use our network if their primary provider
> > (Cogent) is down.
> >
> >
> >
> > What is common practice for this scenario?  We would still prefer to just
> > send a full table and put the control into their hands but I'm also
> > concerned if they will have the technical expertise to accomplish this..
> > On their side, what would be common practice?  I've been looking at
> > conditional BGP advertisements using route-maps but don't believe that's
> > the best solution..
> >
> >
> >
> > Thanks for your input.
> >
> >
> >
> > Paul
>
> Paul,
>
> Most providers offer three options: full routes, partial (customer) routes,
> and default route only. Allowing the customer to select from these options
> allows them to choose the option that they can best support. To implement
> these options, you can create as-path access list and prefix list templates
> and apply them outbound as needed.
>
> Stephen Kratzer
> Network Engineer
> CTI Networks, Inc.