North American Network Operators Group Date Prev | Date Next | Date Index | Thread Index | Author Index | Historical Re: v6 subnet size for DSL & leased line customers
Leo Bicknell <[email protected]> writes: > In a message written on Thu, Dec 27, 2007 at 10:57:59PM +0100, Iljitsch van Beijnum wrote: >> It is wih IPv6: you just connect the ethernet cable and the RAs take >> care of the rest. _You_ _really_ _don't_ _need_ _DHCP_ _for_ _IPv6_. >> If you need extreme control then manual configuration will give you >> that, which may be appropriate in some cases, such as servers. > > Really. I didn't know RA's could: > > - Configure NTP servers for me. > - Tell me where to netboot from. > - Enter dynamic DNS entries in the DNS tree for me. > - Tell me my domain name. > - Tell me the VLAN to use for IP Telephony. > > Those are things I use on a regular basis I'd really rather not > manually configure. I'm running (native) IPv6 at home, and in the colo too. Most of my ssh sessions to personally owned machines go over v6. My laptops (with a single exception) are Macs. You may not be aware that the Mac is fairly smart about which interface it uses for connections - it will prefer the gigabit ethernet to the wireless when it sees link... it prefers wireless to dialup too. Basically, whenever you establish a new outgoing session it will use the "lowest cost" interface to do the deed. For IPv4, I have the same address manually assigned on the DHCP server to both the gigabit ethernet's MAC address and the wireless interface's MAC address. This means that when I plug into the gige, as I do for filesharing or backing some files up, the Mac uses the gigabit ethernet. When I unplug and carry the Mac to the conference room, *all existing upper layer sessions are preserved* - TCP and friends are blissfully unaware that a change has taken place; one gratuitous arp so the router knows where to send the packets and we're on our way again with nary a hiccup. I don't have an ssh session croak just because I connected or disconnected a cable. I'd really, really, really like to have DHCP6 on the Mac. Autoconfig is not sufficient for this task unless there is some kind of trick you can do to make the eui-64 come out the same for both interfaces (don't think so). Anyone from Apple reading this list? :-) ---Rob
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