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If a Red Hat or other Linux host has a conflict with an IP address, is there a way to have it display a warning message on the console or in a log, like Windows and MacOS do? i.e. my computer has an IP address configured (or received from a DHCP server) but finds another device on the network using the assigned address. Will it log the conflict? |
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IP Conflict detection is standardised in RFC 5227. One Linux tool that implements it is IPwatchd, which has a GNOME notification component (ipwatchd-gnotify). |
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you can use arpwatch to find out about ip conflicts on ethernet segment you are connected to. it will alert about unseen ip-mac combinations or whenever such association change. |
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I don't know the exact mechanisism of how it does it, but I've seen warnings in CentOS when bringing up a network device along the lines of "Failed to bring up eth0, a device on the network already has this IP". |
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