MSGID:  7995779e
REPLY: <10iv40e$1e1ba$1@dont-email.me> 76cae8bf
PID: PyGate 1.5.2
TID: PyGate/Linux 1.5.2
CHRS: ASCII 1
TZUTC: 1100
REPLYADDR zsd@jdvb.ca
REPLYTO 3:633/10 UUCP
On 2025-12-29 at 19:48 AST, Pancho  wrote:
> On 12/27/25 23:25, Theo wrote:
>> Jim Diamond  wrote:
>>> I was looking at my network and discovered an IP which I didn't know about;
>>> after a few seconds of investigation I discovered that one of my Pis (which
>>> is on wifi only, and only has one wifi card) has two IPs.
>>>
>>> Two of my other Pis are running the same version of Raspberry Pi OS (i.e.,
>>> "Debian GNU/Linux 12 (bookworm)").  They don't do this.
>>>
>>> Looking around the net, there are claims that this is because Pis might try
>>> to netboot, and that later on in the boot process they also get their usual
>>> IP the "usual" way.  (In my case I am using networkmanager.)
>>>
>>> I can't imagine what I did to make one of my Pis want to (try to) netboot.
>>>
>>> Has anyone here seen this, and, if so, know what grievous sins I have
>>> committed to make this happen?  And how to make it stop?
>> 
>> Is this two IPv4 addresses?  Having multiple IPv6 addresses is completely
>> routine.  As is having one IPv4 and one or more IPv6s.
>> 
>
> Yes, I have recently been experimenting with IPv6.
>
> IPv6 uses:  Static Addresses, Link-Local, DHCPv6, Router Advertisements, 
> and SLAAC.  Proving me with multiple, often random, IPv6 addresses. This 
> totally broke my IP rule based routing.
>
> Unlike my Linux machines, My Android devices take a whole IPv6 block 
> (prefix delegation). I think I'll change all my Linux hosts to this too. 
> I quite like the protection of random addresses, but want them 
> constrained to a recognisable range for each host.
>
> Some websites fail, some apt repos fail under IPv6.
>
> IPv6 seems like a world of pain.

Did someone say "new and improved" ?  ;-)

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