nanog mailing list archives

Re: IPv6 Netowrk Device Numbering BP


From: Valdis.Kletnieks () vt edu
Date: Thu, 01 Nov 2012 13:59:52 -0400

On Thu, 01 Nov 2012 14:28:48 +0100, "Miquel van Smoorenburg" said:

We use a /120 subnet for servers to prevent the NDP cache exhaustion
attack. We do maintain a mapping between IPv4 and IPv6 addresses;
it's simply 2001:db8:vv:ww::xx, where xx is the hex value of the
last octet of the IPv4 address.

ooh.. that's a clever approach I hadn't seen before.  Who should we credit
for this one?

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