Find duplicate IPs inside a subnet

14 10 2015

When a IP address is duplicate in a subnet, if there is a ssh connection to problematic server, the message “Write Failed: broken pipe” usually appears.

For find the MAC address of both hosts, the following command will report them:

# arping -I eth0 -c 3 192.168.0.1

If the result only report one MAC, the problem probably will be in other place.

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