Re: static IP addresses on LAN

Johan W. Elzenga wrote:
fred <freaks@xxxxxxxxxxxxxxxx> wrote:

I'm trying to configure my network to use static IP addresses, but all the
Mac machines are refusing to work with anything except dynamically
assigned IPs from the DHCP server.

I need 6 of the computers to have a fixed static IP address. Two of these
machines are Macs, the rest are linux. One Mac is an intel iMac, the other
is an intel iBook, both are running OSX 10.4.10.

If I tell airport TCP/IP to configure IPv4 manually and enter the correct
address/subnet/router then it gives the green light on airport status and
says it is connected to the network and internet... but it is lying
because access to anything on the internet is impossible.

If I instead configure it to use DHCP, then it gets assigned the wrong IP
address but internet connectivity is restored.

I've also tried the "DHCP with manual address" option, but that just
denies all internet access too.

Is there any fix for this problem?

I use a setup with manually assigned IP adresses as we speak, and that
works without any problems. Check the built-in firewall of your router.
Maybe that is blocking a certain address range.

One thing that I have noted is that by using manually assigned
addresses, the Macs sometimes do not get the necessary DNS server info.
As a result, they are connected to the internet, but they can't find
anything. Check the IP numbers of the DNS servers from your provider,
and fill these in as well in the 'DNS servers' field of the Macintosh
'Network' system preference.


In this context ping and traceroute -n will work, but use of FQDN's will not: Your first recourse under such problems is to examine what ipconfig displays, and use ping to at least the router to establish that IP connectivity exists. Post that the default route should be examined, and then and only then investigate DNS issues.

.

Relevant Pages

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  • Re: Why IP address is fixed everytime connected to the Internet?
    ... The ISP, the network card (i.e. MAC address??), or the ... Typically it is assigned by your ISP. ... from the ISP DHCP server. ... Some Internet connections are formed using PPP ...
    (comp.os.linux.networking)
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