For example, the IP xxx.xxx.xxx.1-127 works, but xxx.xxx.xxx.128-251 are not working. They are working before. Thanks.
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Define "work". Are nodes not able to access information out of the subnet, or the converse; nodes outside of the subnet can't access those nodes? Or something else?– sysadmin1138 ♦May 24, 2011 at 1:00
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There's a website bind with each IP, I can see the website with IP xxx.xxx.xxx.1-127, but not with xxx.xxx.xxx.128-251. Those IPs are in the interface. Thanks.– garconcnMay 24, 2011 at 1:03
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1Can you ping the other addresses? Agreed with KCotreau; the most straightforward cause for this would be an incorrect subnet mask. One way this could happen is if the bad mask is part of the route directing traffic towards you in your upstream device (firewall, router, etc.).– BMDanMay 24, 2011 at 1:06
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1I can't ping them. I will get the network admin to fix it. They may changed something that I don't know. Thank you.– garconcnMay 24, 2011 at 1:08
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4For goodness sake, there's no such thing as a Class-C network. There hasn't been for years. And years. And years: meta.serverfault.com/questions/514/… and serverfault.com/questions/12854/cidr-for-dummies– Mark HendersonMay 24, 2011 at 1:47
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