If you know which devices are out there you can use the Ping Class. This will allow you to at least fill up the ARP table. You can always execute ARP -a and parse the output if you have to. Here is also a link that shows how to pinvoke to call GetIpNetTable. I have … Read more
The neighbor cache in the Linux kernel isn’t as simple as one would think. I’ll try to explain some of the quirks with it. There are subtle differences between an neighbor cache entry actually falling out of the cache entirely or just being marked as stale/invalid. At some point between base_reachable_time/2 and 3*base_reachable_time/2, the entry … Read more
Not all machines have nmap available, but it’s a wonderful tool for any network discovery, and certainly better than iterating through independent ping commands. $ nmap -n -sP 10.0.0.0/24 Starting Nmap 4.20 ( http://insecure.org ) at 2009-02-02 07:41 CST Host 10.0.0.1 appears to be up. Host 10.0.0.10 appears to be up. Host 10.0.0.104 appears to … Read more