I reread draft-thaler-ipv6-ndproxy-02.txt, and wonder if it might be time to revisit the need for ND proxies.
It seems the primary motivation for ND proxies is to avoid the need for L3 devices that require configuration, prefix assignment and configuration. I read the two scenarios in section 1, and, more generally, the motivation for ND proxies to provide bridging between links with dissimilar technologies, as motivation for the use of one ND proxy between a single upstream link (perhaps to a service provider) and one or more local networks.
In the case of a more complicated local topology, it seems to me that it would be highly unusual to find dissimilar link technologies that require the use of ND proxies. Why would anything but bridgeable IEEE802 be used among the local networks?
We've done the hard engineering work in specifying DHCPv6 to solve the problem of configuration and prefix delegation for a single gateway device that has an upstream PPP, cable or wireless connection and multiple downstream local networks. DHCPv6 PD is a published standard with multiple, interoperable implementations. It is available in simple home gateways, equivalent to the IPv4 NAT device in my basement. I don't see a compelling requirement to invent something new.
- Ralph
At 09:16 PM 3/23/2004 +0200, Jari Arkko wrote:
Hmm.... I thought the idea of ND proxies was to avoid a complicated L3 device. If we need something like a routing protocol, maybe its time to pull out the proxy thing and replace it with a real L3 device?
--Jari
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