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New Member

IP Addressing

Not sure if this post should go here...

We are running out of IP addresses in some parts of our network. This network 10.10.1.0 is currently using /25. I want to change it to /24. Does anyone know if I change the router's subnet mask and not change the workstation, will the workstation be able to communicate with other networks.

The problem is I don't have the resources to change the subnet mask on all the workstations at the same time. I hoping to accomplish the change in the 2 or 3 days time.

Thank you....

2 REPLIES
Bronze

Re: IP Addressing

Should work ok. As long as the hosts have longer masks than the router. The only (somewhat) negative affect will be that hosts with 25 bit masks that talk to new hosts will send packets to the router first. It will work buth with a slight bit of excess traffic on the lan.

New Member

Re: IP Addressing

Make sure though to have another secondary address on the ethernet interface of the router belonging to the other /25 part of the net. Meaning..

Have int he router something like..

ip address 10.10.1.1 255.255.255.0

ip address 10.10.1.129 255.255.255.0 secondary

Or whatever IP addresses you have as the gateway for the workstations.

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