detect 2 DHCP Servers on network?

[Carl Friend]

   Hari Sekhon wrote:

> [...] raise the warning code if more than 1 offer was received [...]

   The pitfall here is that if you're running redundant DHCP servers
it's possible to receive two offers.  ISC DHCPD can function in this
way.  A regular client would see the first offer, accept it, and
ignore the second one; the monitoring script would have to be aware
of the network architecture to account for that.

   One thing you could do is record the IP address(es) of your real
DHCP server(s) and if you see anything come in from *anywhere else*
raise the alarm.

+----------------------------------------------+-----------------------+
| Carl Richard Friend (UNIX Sysadmin)          | Natick, Massachusetts |
| Minicomputer Collector / Enthusiast          |            01760-2098 |
| mailto:carl_friend at mathworks.com             +-----------------------+
| http://users.rcn.com/crfriend/museum         |  ICBM: 42:18N 71:21W  |
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