ericargyle Posted February 24, 2011 Share Posted February 24, 2011 Question, currently our network has a DHCP scope of 172.17.6.2 to 172.17.9.250. I would like to expand it to 172.17.6.2 to 172.17.30.250. Is this possible? Just double-checking before expansion. Link to comment Share on other sites More sharing options...
allen2 Posted February 24, 2011 Share Posted February 24, 2011 No if you need this much new addresses including your existing ones, you'll have to use 172.17.0.0 /19 network which will allow you to use ip between 172.17.0.0 and 172.17.31.255 and replace the subnet mask 255.255.224.0. The only way to do it properly, if you're using the 172.17.0.0 ->172.17.5.255 for another physical network, would be to make vlans but as your actual subnet isn't a classic one you might get errors. Check a good subnet calculator there: http://jodies.de/ipcalc?host=172.17.6.0&mask1=22&mask2=. Link to comment Share on other sites More sharing options...
ericargyle Posted February 28, 2011 Author Share Posted February 28, 2011 Cheers Allen. One more question, because I don't want to change the subnet in the middle of the year, what about keeping it at 172.17.6.2 to 172.17.15.250? Will that work? Link to comment Share on other sites More sharing options...
allen2 Posted February 28, 2011 Share Posted February 28, 2011 Yes it will if you change the subnet mask to 255.255.240.0 but you'll also see the network 172.17.0.0-172.17.5.255 so it might create problems if, for example, it is routed to another site. Link to comment Share on other sites More sharing options...
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