Addressing scheme randomly changing from 192.168.1.x to 192.168.2.x

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Level 1

18 points

Addressing scheme randomly changing from 192.168.1.x to 192.168.2.x

I am having a puzzling problem with my servers lately where the IP addressing scheme for DHCP as well as the server itself on en0 will change from my established 192.168.1.x scheme to 192.168.2.x, and not only that it just disappears off the network entirely (I know that switching from 1.x to 2.x will do that but even if I do a search for the incorrect 2.x, it's still gone). This is a really weird glitch. Has anyone encountered this and does anyone have an idea as to where this could possibly be coming from?

Posted on Dec 1, 2011 12:51 PM

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Answer 1

Dec 2, 2011 6:59 AM in response to evets90

Do you have more than one DHCP server on your network, perhaps one is a router of some sort?

In your Mac DHCP server is there just a single DHCP scope defined?

Is your DNS server pointing to the right numbers? That is, is the DNS record for the server itself a 192.168.2.x or 192.168.1.x number?

For your benefit the main DHCP config file on a Mac server is /etc/bootpd.plist you could look at this file itself to see if it has the values you expect.

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Answer 2

evets90 Author

Level 1

18 points

Dec 2, 2011 8:18 AM in response to John Lockwood

hmm, possibly. the way I have it set up right now is I have my 3 servers running 3 internal DHCP servers, however I allocated the addresses so they don't overlap. I think I have it set as this right now (I can always double check):

Server 1:

192.168.1.7 to 192.168.1.125

Server 2:

192.168.1.126 to 192.168.1.190

Server 3:

192.168.1.191 to 192.168.1.254

It worked just fine before, but I can maybe see why it might be confused.

I will also check that file in /etc/ to see if anything just got screwed up too. Thanks!

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