North American Network Operators Group|
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Re: BGP prefix filtering, how exactly? [Re: YouTube IP Hijacking]
On Mon, 25 Feb 2008 15:29:01 EST, Randy Epstein said: > > Our own or our singlehomed customers' address space -- we would reject ^^^^^^^^^^^ > > such an advertisement. The same inbound consistency check applies to > > peers and upstreams/transits. > What do you do when one of your multi-homed customers on your IP space has > an outage on their connection to your network? How would your customers > then reach that customer? He explicitly said "single-homed". Of course, multi-homed requires different handling, because you may hear their other home announce them (although again, you probably shouldn't listen to *THAT* announcement either if *your* link to them is up). And I posit that if you don't know if your customer is single or multi-homed, you have *bigger* issues to deal with.