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Am Dienstag, 14. März 2006 18:08 schrieb Timothy A. Holmes: |
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> Hans -- Thank you, I realize that I can make it blink with network |
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> traffic, the problem is that basically all the ports on the switches |
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> have traffic running constantly on them, so I need to find a way to make |
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> it distinctive enough so it can be picked out from the rest of the |
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> noise. |
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Save the following script as floodping.sh, and try it, you should be able to |
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notice the traffic from your regular traffic: |
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#!/bin/sh |
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ifconfig $1 10.0.0.1 netmask 255.255.255.0 broadcast 10.0.0.255 |
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while true |
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do |
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ping -f -w $2 -b 10.0.0.255 |
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sleep $2 |
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done |
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./floodping.sh eth0 5 |
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would mean that it does five seconds of intensive traffic (which has packets |
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going to the switch in the order of <20ms or so, depending on your laptop, |
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and the lamp should blink very frequently), then does five seconds of data |
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sleep, which should be almost completely quiet on the switch (except for that |
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occasional broadcast packet from another computer directed at yours). |
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Be sure to use a network that isn't on your local net for testing, as my |
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network is 192.*, I've used 10.* in the example. If you use a network that's |
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regularily used on your network, you might get problems discerning the sleep |
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phase, as the arp address of your laptop propagates to all other endpoints on |
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your net due to the use of a regular network, and this might mean a lot of |
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ARP queries, depending on your network size. |
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I've used a technique like this to check the cabling in a building, and it |
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worked just fine. |
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HTH! |
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-- |
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--- Heiko. |
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-- |
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