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:45 mac and a .45 ip?

Discussion in 'Tomato Firmware' started by jsmiddleton4, Jun 12, 2008.

  1. jsmiddleton4

    jsmiddleton4 Network Guru Member

    This is one of those things that I have "discovered", may mean nothing. May be a symptom of something that needs to be tweaked. I never know what the things I see actually mean behind the scenes. But I still see them....

    I have a device that has a mac address that ends in :45. I was trying to assign a static IP that ends in .45 to it. DHCP does not hand out a .45 to the device ever. I don't need .45 as much as just a reliable ip, its a networked all in one office device that allows 2 way scanning, etc., and clients need to access its port assignment without that assignment changing with router reboots. So static ip or assigned ip is the best practical solution. And .45 just fell into the "next" ip to use. But could not no matter what get .45 assigned. I did not know if having the :45 in the mac had anything to do with it.

    I went with .46 and its all good. But I wanted to at least ask...
     
  2. TexasFlood

    TexasFlood Network Guru Member

    I just changed the static assignment of my laptop to 192.168.10.45 then did an ipconfig /renew and seemed to work just fine. My MAC doesn't end with 45 but I'm not thinking that is the issue. But honestly I can't think of what the issue could be.
     
  3. jsmiddleton4

    jsmiddleton4 Network Guru Member

    I can and did assign .45 ip to any other devices for whom/which the mac does not end in :45. Its not like .45 as an ip address is locked, unavailable, in use, etc. I just can't assign it to the one device that whose mac ends in :45. Its weird.
     
  4. TexasFlood

    TexasFlood Network Guru Member

    Actually, just checked and I happen to have a printer with a MAC ending in C2:96:45 and was able to assign the IP address of 192.168.10.45 to it without issue.
     
  5. jsmiddleton4

    jsmiddleton4 Network Guru Member

    Got it to work. This time I unplugged the networked printer for awhile. Turning it off and on must not have been clearing whatever it was holding on to in terms of ip address. Once it got .46 it kept it. Removing power cleared it and now .45 went right in....
     
  6. TexasFlood

    TexasFlood Network Guru Member

    Makes sense, I have an old HP JetDirect print server that won't renew it's IP unless I either power cycle it or telnet in and DHCP off and back on.
     

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