MSGID:  aa2d52d9
REPLY:  17e37432
PID: PyGate 1.5.2
TID: PyGate/Linux 1.5.2
CHRS: CP1252 2
TZUTC: 0000
REPLYADDR invalid@invalid.invalid
REPLYTO 3:633/10 UUCP
Jim Diamond  writes:
> Richard Kettlewell  wrote:
>> Jim Diamond  writes:
>>> 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.
>>
>> Where are you finding the two addresses?
>>
>> What does
>>   ip addr show
>> display?
>>
>>> 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.)
>>
>> What does
>>   rpi-eeprom-config
>> display?
>
> BOOT_UART=0
> WAKE_ON_GPIO=1
> POWER_OFF_ON_HALT=0

What model of Pi is it?

> (Nothing there about BOOT_ORDER, altho my Pi5 (not the computer that showed
> up with two IPs) does have BOOT_ORDER=0xf461.  But it would appear I'd need
> a 0x2 in there fairly early for it to try a netboot.)

Elsewhere:

> No, the Pi thought two IPs were associated with the one and only wifi
> card.  (In fact, I discovered which device it was by ssh-ing in after
> nmap told me that it was listening on the sshd port.)

i.e. the interface has two addresses after booting has completed.  I
would put network boot at the bottom of the list of possible causes.
AIUI the kernel starts from a blank slate, it doesn?t inherit interface
configuration from the boot loader.

-- 
https://www.greenend.org.uk/rjk/

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