Hi all, Can pls share your experience on this? Currently I have this network: 10.1.16.0/22. 10.1.16.0-10.16.17.254 are DHCP managed 10.1.18.0-10.1.19.254 are statically assigned If I need to expand it to: 10.1.16.0/20 1. What is the best way to do it with minimal network disruption? 2. If I keep some machine with 22 subnet mask, will it still be able to talk to the other machines in it's range? Thank you. Fajar.
On Tue, 26 Jul 2011, Fajar Priyanto wrote:> Hi all, > Can pls share your experience on this? > > Currently I have this network: > 10.1.16.0/22. > 10.1.16.0-10.16.17.254 are DHCP managed > 10.1.18.0-10.1.19.254 are statically assigned > > If I need to expand it to: > 10.1.16.0/20 > > 1. What is the best way to do it with minimal network disruption?> 2. If I keep some machine with 22 subnet mask, will it still be able > to talk to the other machines in it's range?Seeing as noone else has posted anything, you can have my thoughts. I think the answer to this part is not trivially. A machine in the /20 subnet will expect to be able to talk directly to a machine within the /22, but that machine will want to talk via a router. You can hide subnets within subnets using arp-proxying, but I'm not sure there's an easier way. A machine within the /22 would be able to talk to any other machine within that /22 (even if they're configured to use /20), but won't be able to happily talk to machines within the /20 but outside of the /22. jh
From: Fajar Priyanto <fajarpri at arinet.org>> Currently I have this network: > 10.1.16.0/22. > 10.1.16.0-10.16.17.254 are DHCP managed > 10.1.18.0-10.1.19.254 are statically assigned > If I need to expand it to: > 10.1.16.0/20 > 1. What is the best way to do it with minimal network disruption?I am no subneting pro but: Currently you have half DHCP and half statics... How will it be with the /20?? Still half/half? ? $ ipcalc -nb 10.1.16.0/20 ? Address:?? 10.1.16.0??????????? ? Netmask:?? 255.255.240.0 = 20?? ? Wildcard:? 0.0.15.255?????????? ? => ? Network:?? 10.1.16.0/20???????? ? HostMin:?? 10.1.16.1??????????? ? HostMax:?? 10.1.31.254????????? ? Broadcast: 10.1.31.255????????? ? Hosts/Net: 4094 A /20 half/half would give: ? 10.1.16.1-10.1.23.254 ? 10.1.24.1-10.1.31.254> 2. If I keep some machine with 22 subnet mask, will it still be able > to talk to the other machines in it's range?They would talk to 10.1.16.1-10.1.19.254 ones, but would go for the gateway for 10.1.20.1-10.1.31.254 JD