On Fri, 12 Nov 2004, Simon Leinen wrote:
Daniel Roesen writes:
On Thu, Nov 11, 2004 at 08:44:57AM -0800, Kevin Oberman wrote:
We have renumbered IPv6 space a couple of times when we were developing our addressing plan. (We have a /32.) Renumbering was pretty trivial for most systems, but servers requiring a fixed address were usually configured with an explicit prefix. This should not have been the case, but most people configured IPv6 addresses pretty much like IPv4 and specified the entire 128 bits. Of course, after a renumbering, this gets fixed, so those systems are usually OK the next time.
"specified the entire 128 bits"... how do you specify only part of it?
On Solaris, you would use the "token" option (see the extract from "man ifconfig" output below). You can simply put "token ::1234:5678"
one presumes solaris <> 7 or 8 then, which solaris would this be in?
: man ifconfig | grep token Reformatting page. Please Wait... done
I'd note that a simple: echo "up" >> /etc/hostname6.hme0 will get you 'autoconfigured' v6 on solaris 8 though, and add to /etc/inet/ipnodes: <node address> <node name> and fix /etc/nsswitch.conf: ipnodes: files dns after that, ping/traceroute/telnet/ftp all work correctly with ipv6. I was cursing sun/solaris until I figured that part out :)
I think it's an advantage if servers can get their prefixes from router announcements rather than from local config files. Sure, you still have to update the DNS at some point(s) during renumbering, but that can't be avoided anyway.
and change that all when the interface on the server fries out and a replacement is put into the box, with a new 'autoconfigured' ip address... or if your 'service' is a virtual ip on a server... things get complicated, it's 'fun' :) Autoconfig has it's place, which is far from 'everywhere'. -chris ipv6-n00b