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krock83
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IPv6 subnet calculator

Wed May 09, 2012 10:45 am

Hello all,

Is there a Ipv6 subnet calculator? We have been given a /64 from our provider but I have no tools to brake that up. Any suggestion?
Thanks

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that1guy15
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Re: IPv6 subnet calculator

Wed May 09, 2012 11:10 am

Do it by hand. A quick google search will give you plenty of links to show you how. Or get a IPv6 book and read up.
http://blog.movingonesandzeros.net/

Davidr
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Re: IPv6 subnet calculator

Wed May 09, 2012 11:17 am

my understanding is this

you have a /64

2001:0db8:85a3:0000:0000:0000:0000:0000

the bold section is considered your network address when thinking ipv4. so anything after that you can use for hosts/networks. A whole lot of networks.

Here is a quick example

2001:0db8:85a3:0000:0000:0000:0000:0000 - 2001:0db8:85a3:0000:ffff:ffff:ffff:ffff

so you can have

2001:0db8:85a3:0000:0001:0000:0000:0000 - 2001:0db8:85a3:0000:0001:ffff:ffff:ffff
2001:0db8:85a3:0000:0002:0000:0000:0000 - 2001:0db8:85a3:0000:0002:ffff:ffff:ffff
etc..

i could be totally wrong

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mellowd
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Re: IPv6 subnet calculator

Wed May 09, 2012 11:17 am

You got a single /64? That's 1 subnet. Go back and ask them for a /48

krock83
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Re: IPv6 subnet calculator

Wed May 09, 2012 12:21 pm

that1guy15 wrote:Do it by hand. A quick google search will give you plenty of links to show you how. Or get a IPv6 book and read up.


Yooo.. According to my calculations there are 18446744073709500000 hosts in my range which is /46 (sorry I missed typed) .. I wonder how would you manage that by hand?

2001:XXX:b8::/46

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that1guy15
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Re: IPv6 subnet calculator

Wed May 09, 2012 12:30 pm

krock83 wrote:
that1guy15 wrote:Do it by hand. A quick google search will give you plenty of links to show you how. Or get a IPv6 book and read up.


Yooo.. According to my calculations there are 18446744073709500000 hosts in my range which is /46 (sorry I missed typed) .. I wonder how would you manage that by hand?

2001:XXX:b8::/46


Manage what? you still have the same number of end users/host as you do with IPv4. Assign the addresses and document them how you normally would. use the same design prinipals for creating subnets that you used for IPv4. None of that changes.

Or am I missing what your asking???
http://blog.movingonesandzeros.net/

krock83
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Re: IPv6 subnet calculator

Wed May 09, 2012 12:56 pm

that1guy15 wrote:
krock83 wrote:
that1guy15 wrote:Do it by hand. A quick google search will give you plenty of links to show you how. Or get a IPv6 book and read up.


Yooo.. According to my calculations there are 18446744073709500000 hosts in my range which is /46 (sorry I missed typed) .. I wonder how would you manage that by hand?

2001:XXX:b8::/46


Manage what? you still have the same number of end users/host as you do with IPv4. Assign the addresses and document them how you normally would. use the same design prinipals for creating subnets that you used for IPv4. None of that changes.

Or am I missing what your asking???


So what I am asking is we have three Data Centers.. and we would like to test manual tunneling on the core and need to brake up that /46 into smaller subnets simmilar like you would brake 200.10.0.0/16 into 4 /18's
200.10.0.0/18
200.10.64.0/18
200.10.128.0/18
200.10.192.0/18

and then we could allocate 200.10.0.0/18 to Dallas DC and 200.10.64.0/18 to Chicago, and 200.10.128.0/18 to NY. the last one for Testing LAB etc

So how can I do this with my 2001:XXX:b8::/46 address without IPAM

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ristau5741
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Re: IPv6 subnet calculator

Wed May 09, 2012 1:01 pm

break it on the 64 boundary

0
64
128
192

convert these numbers to hex
and stick 'em in one if the network fields.

2001:XXX:b8::/46

update the mask to make it longer

--

00
40
80
C0

where is your IPv6 buddy?
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raven
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Re: IPv6 subnet calculator

Mon May 14, 2012 2:37 am

One /46 means you have 4 /48. Assign one /48 for each Data Center :mrgreen:
http://ccie20728.wordpress.com/

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