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Re: URPF on small BGP-enabled customers?
On Jun 3, 2005, at 9:30 AM, [email protected] wrote:
At an old transit provider I was at, we had a pig of a time dealing with<disclaimer> Not uRPG guru </disclaimer>
Why would that work? If I see a /16 from my customer and a /19 from a peer, I will still pick the /19, and strict uRPF should drop any packets from that /19 coming the customer interface, right?
Not to mention the Really Bad Things associated with deaggregation.
Perhaps a simpler way is to announce your entire allocation and put no-export on things you want to come in your other provider? ^1239$ will still pick those routes, but no one else will see them. Although sprint is a _VERY_ large network when you include downstreams, their own AS is rather tiny compared to the whole Internet.