Networks Analyzed @ Netralized

If you want to discover all the active hosts on your subnet from your routers console, you can perform a ping in the broadcast address of your subnet. Keep in mind that all the active nodes on your subnet should respond to that ping. As a tip I can tell you that this kind of ping will only work in privileged exec mode.

For example if you use the subnet 10.1.1.0 /24 the broadcast address is 10.1.1.255

From privileged mode perform a ping like this:

Router#ping 10.1.1.255

A “list” with all the active nodes should appear.

Another command that you can use to find out with witch hosts has the router communicated is

Router#show ip arp

You can use this useful type of ping for many types of things, for example to check how many computers are connected on a wireless network. Till our next article, stay tuned.

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This entry was posted on Wednesday, November 7th, 2007 at 10:31 pm, by Jim Skenderlis and is filed under General Networking. You can leave a response, or trackback from your own site.