[lpi-discuss] IPv6 in exam LPI ?
jstanger at prosoftlearning.com
Wed Aug 17 14:39:55 EDT 2005
I agree with Brian. My Ubuntu system enabled IPv6 automatically. To
increase lookup speed, I had to edit the /etc/modprobe.d/aliases file
and disable IPv6.
So, I would say that an LPIC 1 should at least know common IPv6 concepts
(e.g., how to read an IPv6 address, how to edit files to get the system
to use ipv4 and/or IPv6). An LPIC 2 should be able to configure a system
to use IPv6. I've done IPv6 training for a few years, and adoption is
slow. Still, it's IP's future. We should have it in both exams.
Bryan J. Smith wrote:
> "Bryan J. Smith" <b.j.smith at ieee.org> wrote:
>>and there is 3 bits near the front header that designates
>>its the local LAN.
> Sorry, I mixed concepts (and mega-oversimplified there).
> The first 3-bits are pretty key in IPv6 designation.
> The first 3-nibbles (nibble=4-bits -> 12-bits) are almost an
> absolute indicator of the type of subnet.
> FE8 indicates IPv6** LINKLOCAL, and it's what you'll see on
> _any_ IPv6 node, period. This is also known as the FE80::/64
> network. It's equivalent in the IPv4 world is the 169.254/16
> network, although unlike IPv4 nodes that might drop their
> 169.254/16 assignment when they get their address from DHCP,
> a IPv6 node _always_ has its IPv6 LINKLOCAL address. In
> fact, a IPv6 DHCP typically only assigns another IPv6 network
> (top 64-bits) and the lower 64-bits (based on the 48-bit
> address) stays the same.
> It's this basic IPv6 identification that I think needs to go
> in the next rev of any exam. Whenever IPv4 is discussed,
> there needs to be at least the mention of IPv6 -- even if
> we're just teaching people to disable it with ifconfig.
> -- Bryan
> **NOTE: If you haven't heard by now, IPv6 uses 128-bit of
> 16-bit x 8 double-words. E.g., FE80::0200:ABCD:EF12:3456 is
> a local LAN IPv6 address with a MAC address of
> AB:CD:EF:12:34:56. The IPv6 nomenclature allows for "::" to
> shorten/abbreviate one or more double-words that are 0000 --
> such as typical in the LINKLOCAL (which is FE80::/64).
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