North American Network Operators Group
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Re: aggregation & table entries

  • From: Christopher L. Morrow
  • Date: Fri Oct 15 00:19:36 2004 
On Thu, 14 Oct 2004, Daniel Roesen wrote:
> On Thu, Oct 14, 2004 at 08:05:50AM +0300, Pekka Savola wrote:
> > know if others than Juniper are providing that), you can enable strict
> > uRPF toward those customers, still de-pref them, and accept the
> > packets with correct source addresses.
> >
> > That's what we do with our customers whether multihomed or not.
>
> And what do you do with a BGP customer which sends you traffic from
> prefixes he doesn't want to announce to you? There are such customers.
> Fail filter ACL?

This has been my question with uRPF from the beginning. You can solve this
on for some networks, but it doesn't scale very well. Especially where you
really don't know that your customer's customer is doing this.