nanog mailing list archives
Re: Dual stack IPv6 for IPv4 depletion
From: joel jaeggli <joelja () bogus com>
Date: Thu, 16 Jul 2015 21:45:22 -0700
On 7/15/15 9:10 AM, John R. Levine wrote:
It would be nice if it were possible to implement BCP 38 in IPv6, since this is the reason it isn't in IPv4.There isn't any technical reason that an organization can't fix its edge so it doesn't urinate bad IPv6 traffic all over the Internet.In IPv4 systems, the problem is (so I have been told by some largish ISPs) that a dual homed customer gets address ranges from ISPs A and B, and sends traffic with A addresses to the B interface. The ISPs have no practical way to tell legit dual homed traffic from malicious, particularly when there is a chain of resellers in between. If the ISP tells the customer to send the traffic over the right interface, the usual response is "if you don't want our business, I'm sure we can find another ISP that does."
Strict rpf has the super nice property that if you withdraw you prefix from a peer, that peer blackholes traffic. there are all sorts of fun cases like for example MLPE peering on exchange fabrics where you can't just tag the prefix no export and send it to your neighbor, which means it's all or nothing. The exigent reality is that the less control customers have over their own policy then the easier they are to filter. retail isp customers with prefixes delegated by their provider, easy so when ISPS practice good hygiene on their retail side, great.. some dude at an exchange point direct adjacency or no, quite a bit harder.
Like I said, it would be nice if ISPs could persuade their v6 customers to get their own PI space early on, because if they don't they'll have exactly the same problem. R's, John
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Current thread:
- Re: Dual stack IPv6 for IPv4 depletion, (continued)
- Re: Dual stack IPv6 for IPv4 depletion Valdis . Kletnieks (Jul 14)
- Re: Dual stack IPv6 for IPv4 depletion Mel Beckman (Jul 14)
- RE: Dual stack IPv6 for IPv4 depletion Chuck Church (Jul 14)
- RE: Dual stack IPv6 for IPv4 depletion John R. Levine (Jul 14)
- RE: Dual stack IPv6 for IPv4 depletion Matthew Huff (Jul 14)
- Re: Dual stack IPv6 for IPv4 depletion Nikolay Shopik (Jul 14)
- RE: Dual stack IPv6 for IPv4 depletion Chuck Church (Jul 15)
- Re: Dual stack IPv6 for IPv4 depletion John Levine (Jul 15)
- Re: Dual stack IPv6 for IPv4 depletion Valdis . Kletnieks (Jul 15)
- Re: Dual stack IPv6 for IPv4 depletion John R. Levine (Jul 15)
- Re: Dual stack IPv6 for IPv4 depletion joel jaeggli (Jul 17)
- Re: Dual stack IPv6 for IPv4 depletion Mark Tinka (Jul 16)
- Re: Dual stack IPv6 for IPv4 depletion Matthew Kaufman (Jul 15)
- Re: Dual stack IPv6 for IPv4 depletion Mark Andrews (Jul 14)
- RE: Dual stack IPv6 for IPv4 depletion Tony Hain (Jul 14)
- Re: Dual stack IPv6 for IPv4 depletion Lyndon Nerenberg (Jul 14)
- Re: Dual stack IPv6 for IPv4 depletion Doug Barton (Jul 14)
- Re: Dual stack IPv6 for IPv4 depletion George Metz (Jul 15)
- Re: Dual stack IPv6 for IPv4 depletion Owen DeLong (Jul 15)
- Re: Dual stack IPv6 for IPv4 depletion Barry Shein (Jul 15)
- Re: Dual stack IPv6 for IPv4 depletion Owen DeLong (Jul 15)