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   RBERRYPI      Support for the Raspberry Pi device      21,939 messages   

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   Message 21,733 of 21,939   
   Richard Kettlewell to All   
   Re: RPi associating two IPs with its one   
   29 Dec 25 10:59:29   
   
   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/   
      
   --- PyGate Linux v1.5.2   
    * Origin: Dragon's Lair, PyGate NNTP<>Fido Gate (3:633/10)   
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