[Discuss] IPv6 question

Craig Miller cvmiller at gmail.com
Thu Dec 12 08:21:00 PST 2024


Hi Ron,

Sorry, this email slipped past me.

The first thing I would do is question the VP provider on why are they 
handing out /112's. This is very much IPv4 thinking. OVH hosting has a 
/32, which means they can give out over 4 Billion /64s (the IPv6 
standard) . I doubt they have more than a few million customers.

The addresses you have listed are all in the same subnet 
(2607:5300:203:b716::1:0). If they are claiming you get 65k addresses, 
then your address range should include the last 16 bits, or 
2607:5300:203:b716::1:0 to 2607:5300:203:b716::1:FFFF But again this is 
NOT the way to do IPv6. Every VM should have at least a /64.

I hope this helps,

Craig...

On 11/23/24 21:40, Ron / BCLUG wrote:
>
> I was assigned some IPv6 addresses to my VPS and they cause no end of 
> confusion.
>
>
> When I type:
>
> ip addr show
>
> I get these:
>
> 2607:5300:203:b716::1:2/112
> 2607:5300:203:b716::1:3/112
> 2607:5300:203:b716::1:4/112
> 2607:5300:203:b716::1:5/112
> 2607:5300:203:b716::1:6/112
>
>
> To me, it looks similar to:
>
> 10.0.0.2/24 (or /28?)
> 10.0.0.3/24
> ...
> 10.0.0.6/24
>
> That is, they appear to have subnets that overlap.
>
>
> Am I reading this correctly?
>
>
> I fed them through an online IPv6 subnet calc tool and it seems to 
> agree with me.
>
>
> Do I have 5 IPv6 addresses, or are the /112 indicating I have more, 
> like a total of 65k-ish like the online tool indicated?
>
>
>
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