Ray Olszewski wrote:
No matter how the pings themselves turn out, now check the arp table on the host you've ping'ed from. How you do this is OS specific; in Linux. you'd "cat /proc/net/arp". If both Ip addresses are present and show the same associated MAC address, then proxy arp is working as it should.
Or using iproute2 (I like sticking to the ip command, and to the man with a hammer...):
ip neighbor show
Wimp.
I once saw Linus doing a presentation about the early days of Linux. He said something like: "Well, at that point we had a kernel, a shell, and a compiler working. And that's all we really needed." Someone asked, "What about an editor?" He responded, "Real men use cat."
OK, to be serious ... although iproute2 ("ip") is standard on current LEAF systems, it isn't standard on all Linux distros. A stock Debian installation, for example, still doen't include it in the base config (it's an "optional" package). The only reliable procedure I know of for checking the arp table on *any* Linux system is to cat (or more) the relevant pseudofile directly.
He could also use arping, which will return the MAC address as part of the ping response itself.
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