[olug] Ipv6 help/pointers

[Justin Reiners]

Well I called CenturyLink back, They are taking my current /64 back and
giving me a /48, which should allow for 65,000 subnets. woohoo! Then I can
just use  DHCP autoconfiguration for IPs on my LAN, as I have no need to
host services from within the LAN, and have no care if they change.


On Wed, Jul 24, 2013 at 4:27 PM, Lou Duchez <lou at paprikash.com> wrote:

> I've been turning IPv6 over and over in my head the past couple weeks, and
> perhaps this will help -- my compare/contrast between IPv4 and IPv6 (as
> they might be implemented in a LAN / Router / WAN scenario):
>
> ---
>
> IPv4:
> addresses are 32 bit
> addresses are either private or public
> individual computers have private IPs
> router has a private IP and a public IP, so it can communicate both with
> local computers and with the Internet
> router performs Network Address Translation (NAT) to carry traffic from
> individual computers to the public Internet
>
>
> IPv6:
> addresses are 128 bit
> all addresses are public, even on devices behind the router
> the first 64 bits are specified by the ISP, and identify both the ISP and
> your Internet connection
> the last 64 bits are specified for each device by the end user (probably
> via the router)
> 128-bit addresses can be thought of as containing both a public component
> (the first 64 bits) and a private component (the last 64 bits)
> your ISP won't be providing an IP address so much as a 64-bit network space
> router will not perform NAT -- 128-bit addresses contain enough
> information to be routable on both the private and public sides
> router will still perform most of its usual functions -- gateway,
> firewall, etc -- it just won't need NAT to perform them
>
> ----
>
> With those observations in mind (and a warning -- it could be that I'm
> mistaken on some of them), it sounds like you'll want to set up your router
> to not block any ports to some subnets, but to block ports to another
> subnets.  That is the defining difference between the DMZs and LANs you
> want to set up.
>
>
>
>  OK, still confused, so if I was issueed, for example
>> 20f1:0428:1D02:0101::/64 and the last 4 host bits need to stay the same,
>> how do you subnet into two?
>>
>> can I do like 20f1:0428:1D02:0101:0001::/63
>> and              20f1:0428:1D02:0101:FF01:/63
>> ? For some reason IPv6 makes my brain hurt. I have also tried a few
>> calculators, and get mixed results.
>>
>>
>> On Wed, Jul 24, 2013 at 3:16 PM, Hurley, Rod <RHurley at tenaska.com> wrote:
>>
>>  http://www.youtube.com/watch?**feature=player_detailpage&v=**PiOvdgU5I6I<http://www.youtube.com/watch?feature=player_detailpage&v=PiOvdgU5I6I>
>>>
>>> Check this IPV6 subnetting video out.  Simple, but explains what you can
>>> change and what you should not mess with.
>>>
>>> Rod
>>>
>>>
>>> -----Original Message-----
>>> From: olug-bounces at olug.org [mailto:olug-bounces at olug.org] On Behalf Of
>>> Justin Reiners
>>> Sent: Wednesday, July 24, 2013 3:06 PM
>>> To: Omaha Linux User Group
>>> Subject: [olug] Ipv6 help/pointers
>>>
>>> I am implementing ipv6 here at work, we were given a /64 from
>>> centurylink.
>>> everywhere I read online they say not to subnet a /64 . I would like to
>>> split it between DMZ and lan  networks. Anyone have any good references
>>> for
>>> ipv6 subnetting? Can a /64 be split into like a million /63s?
>>> ______________________________**_________________
>>> OLUG mailing list
>>> OLUG at olug.org
>>> https://lists.olug.org/**mailman/listinfo/olug<https://lists.olug.org/mailman/listinfo/olug>
>>> ______________________________**_________________
>>> OLUG mailing list
>>> OLUG at olug.org
>>> https://lists.olug.org/**mailman/listinfo/olug<https://lists.olug.org/mailman/listinfo/olug>
>>>
>>>
>>
>>
> ______________________________**_________________
> OLUG mailing list
> OLUG at olug.org
> https://lists.olug.org/**mailman/listinfo/olug<https://lists.olug.org/mailman/listinfo/olug>
>



-- 
*Justin Reiners*
Hotlines Technical Solutions Engineer.
Phone: 800.807.2967
www.PartsHotlines.com
www.MrCycleParts.com
    <http://www.facebook.com/pages/PartsHotlinescom/251605051521985><https://plus.google.com/102910487271834609118>