Alexander Clouter wrote:
Is anyone actually using that? What advantages does it have over the
stateless auto-configuration protocol? (i've not really done that much
reading as regards to IPv6 yet).
Problem with stateless is that in the long run (for organisations) I
doubt people will use it. Why, RFC3041. Second reason, in the IPv6
world it's expected that you have *several* IPv6 addresses (mobile IPv6,
local-link, SCTP gets exciting too here). It's going to make it awkward
to deal with user accountability when most systems are built around the
concept that the user has one IPv4 address...yet alone in addition
several IPv6 addresses some of which vary over time.
Stateful IPv6 (aka DHCPv6) is not there yet. There are numerous, serious
problems with the IPv6 RFCs, in particular the exact semantics of the
M/O bits. There is much discussion (some informed, some clueless) in the
IETF mailing list archives, if you want to waste a day.
I think that's why a lot of organisations are not keen on stateless IPv6
address assignment but are keener on DHCPv6. I personally would just
like an event driven (no SNMP polling...) method that lets me log
address<->MAC address usage.
Whilst polling is awkward, event-driven has disadvantages too;
specifically, high-rate changes (power outages).
FWIW I changed our ARP polling to use an "expect" script against out
Cisco 6500s, because the SNMP ipNetToMedia table is sloooowwwwww when it
gets >20k entries, but the CLI table is sorted in hardware-order, and is
thus fast.
I would ask for ideas, but this is all getting hugely OT.
Ideas for what?
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