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tdyll

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ifconfig - bcast for 16bit netmask

On a RedHat 6.1 box ifconfig shows eth0 inet addr:10.75.20.201 Bcast:10.75.20.255 Mask: 255.255.0.0 This is a large production network. The correct subnet is 255.255.0.0 there is no other PC with a dup address. If I ping -b 10.75.20.255 I will recieve a reply from my self only. If I ping -b 10.75.255.255 I recieve replies from all over the subnet. Does if config show the correct broadcast address? Can you manually set the broadcast?
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helver

You can set the broadcast address...

probably the best way is to go into

/etc/sysconfig/network-scripts/ifcfg-eth0

and edit the appropriate lines...

alternatively, you can do a man ifconfig, and simply do it from the command line.
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ASKER

Thanks for the infomation on where to make the change. I am going to break out the TCP/IP books tonight but I was interested in a conformation that the correct broadcast for ip address 10.75.20.201/16 is 10.75.255.255.

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mixerfix122699

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ASKER

Good answer, Thanks for helping me confirm the fix to my problem.

As for constructive critisizm. You may want to stick to plain english. I have no idea what you meant by "vis-a-vis" and english is my first language. Think of the guy outside the USA who may learn something from your comments.

If you want to bring up RFC guidelines for non-routing address classes you need to explain it completely. Just making reference to "Class A" addressing will only confuse the less experienced.