| Gentlemen: I'm writing to you as the authors of RFCs 4861 and 4862. In a past meeting, I think the one in March, an issue came up in Savi that has now been brought to our attention in a formal manner. The problem is that in certain access network technologies, notably DSL and I believe Cable Modem, the connectivity between the CPE host or router and the ISP's first hop router is siloed - it looks like an Ethernet to the host but in fact is separated into separate channels. The effect is that while the ISP router can speak to and hear all of the CPEs it is connected to, the CPEs cannot hear each other. This has implications for Duplicate Address Detection in SLAAC. We look forward to your advice. Fred Baker IPv6 Operations Begin forwarded message:
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BBF liaison to IETF on IPv6 security.pdf
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