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Currently i've got a dhcpd server setup I inherited with a range of 192.168.0.1 -> 192.168.0.254 (mask 255.255.255.0) and it's close to filling up.
I'm looking to expand that to 192.168.0.1 -> 192.168.3.254 (mask is 255.255.252.0 i think?) to cope with the expansion. I've got the dhcpd server to assign the addresses, but it seems something on 192.168.2.x can't see a 192.168.0.x computer.. I'm guessing this is an issue with the subnet mask. What are my options on going around this so that each block can see the other?
I set the bcast on the new setup to 192.168.3.255 which is the settings i've calc'd, aswell as the mask on the iface and dhcpd.conf to 255.255.252.0.
Is there anything else I need to do? Or do I just need a basic primer on subnets? The dhcpd server is setup to use the IP 192.168.0.15.
Thanks!
Last edited by mawhii (2009-09-30 01:18:58)
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I don't think that's it, after the system with 2.x gets it's IP, it can't even see our DNS server (same ip as dhcpd).
I'll give it a shot with a few machines and updated ips though.
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I don't think that's it, after the system with 2.x gets it's IP, it can't even see our DNS server (same ip as dhcpd).
apologies for asking a stupid question, and again if you've already answered it in your post and I missed it, but have you updated the IP config on the DHCP/DNS server to the new subnet mask?
Also, install tcpdump on the DHCP/DNS server and try running something along the lines of:
tcpdump -lnn -i ethX arp and host X.X.X.X and host Y.Y.Y.Y
ethX = LAN interface
X.X.X.X = DHCP server IP (eg, 192.168.0.1)
Y.Y.Y.Y = client IP (eg, 192.168.3.100)
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Aha! got it! cranky was right. The Pc I was connecting to still had the 255.255.255.0 subnet.
As for DNS.. turns out it was only setup to accept 192.168.0.0/24!
Switched over now and everythings smooth
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