DHCP

[Onyi C. Ejiasa]

Constantine,

Sounds like a dilemma. I would say that the short answer is you need to hook up a keyboard and monitor to your box and run an ifconfig to see what address is listed per interface. You could probably figure this out with a bunch of painful guesswork, but you don't want to put yourself thru all that if you don't have to.

I am confused with the whole "switcher" thing. What the heck is that? Are you referring to a 10base/100base switch or hub of some sort? My recommendation to you would be to get an inexpensive hub and a crossover cable. Connect these to your ZyXEL. Connect your BSD box and your laptop directly to the hub using straight thru cables.

This will allow you to use/test/diagnose/whatever both boxes independent of eachother. Regardless if the BSD box is wiggin' out or not, the WinXP comp. should work (and vise versa).

If this is not a option, then answer me some questions...

1.] What happens if you hook the DHCP nic on the FreeBSD box directly to the ZyXEL WITHOUT the "switcher"? Does it report an IP after running ifconfig?
2.] DO the same thing with the other network card in the BSD box. Are you able to ping from it to the router with an assigned ip on the same network?

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Onyi C. Ejiasa
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  ----- Original Message ----- 
  From: Constantine 
  To: freebsd-isp 
  Sent: Tuesday, April 29, 2003 5:05 PM
  Subject: DHCP


  Hello!

  I have a FreeBSD box with 2 Ethernet cards, win xp notebook, a DSL-modem 
  ZyXEL P645ME+, and a switcher.
  First I connected the modem directly to win xp, the internet was working.
  Then I connected FreBSD and the modem to the switcher (I don't have a 
  free crossover cable. Nothing else was connected to that switcher at the 
  time), and win xp to the FreeBSD. The internet was not working on the 
  FreeBSD, though after manually running "ifconfig sis0 192.168.1.18 
  netmask 255.255.255.252" I could connect to the modem itself, but not to 
  the internet (by default sis0 is set to the DHCP, and the modem supports 
  DHCP, but it does not seem to give an address to the FreeBSD).

  Question 1:
  After I have made a few changes to the settings on the FreeBSD box, and 
  restarted the system, I cannot connect to my FreeBSD box anymore. Is 
  there a way to connect to the FreeBSD box, if the network addresses got 
  messed up? One of the interfaces should be set to the DHCP, so is there 
  a way, or an utility for win32 (cygwin, or just windows) to get back my 
  access to the box, or will I need to borrow a monitor to fix that up?

  Question 2:
  And the second question is, why the modems DHCP server was not assigning 
  the address to the FreeBSD? Could it be, because it was connected 
  through a switcher? Now my win xp is connected through the same switcher 
  to the same modem, and everything works fine...

  Just for a reference, these are a few lines that should be in my 
  rc.conf. I was playing with the gateway, natd, and that kind of 
  features, and after restarting I can no longer ping the box through the 
  fxp0 interface with the address stated above.
  ifconfig_sis0="DHCP"
  ifconfig_fxp0="inet 192.168.0.18  netmask 255.255.255.0"
  gateway_enable="YES"

  Thank you for reading this letter,
  Constantine.

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