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Answered Question
Jul 11th, 2007

When I ping the broadcast address of my LAN I get an ICMP message as "Request timed out". Why don't I get reply from every computer on LAN?

I have this problem too.
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Correct Answer by srue about 9 years 4 months ago

Good question. I think I may have found the answer. It turns out, IP implementations only need *optionally* respond to broadcast pings. MS has chosen not to allow windows machines to reply to such pings - probably for security reasons. Other vendors might allow the IP stacks to reply to broadcast pings - I know some of my IOS equipment replies to them.

http://support.microsoft.com/kb/q137421/

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Correct Answer
srue Wed, 07/11/2007 - 18:36

Good question. I think I may have found the answer. It turns out, IP implementations only need *optionally* respond to broadcast pings. MS has chosen not to allow windows machines to reply to such pings - probably for security reasons. Other vendors might allow the IP stacks to reply to broadcast pings - I know some of my IOS equipment replies to them.

http://support.microsoft.com/kb/q137421/

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