Modify the internal network netmask

If the netmask is too restrictive for the size of the internal network, you must modify the netmask settings. It is recommended that you specify a class C netmask, such as 255.255.255.0, for the internal netmask. This netmask is large enough to accommodate future nodes.

1. Click Cluster Management > Network Configuration > Internal Network.
2. In the Internal Network Settings area, select the network that you want to configure the netmask for.
   • To select the int-a network, click int-a.
   • To select the int-b/failover network, click int-b/Failover.
     

     
     

     Ignore this step if you are configuring the netmask for IsilonSD Edge.
     
     
   We recommend that the netmask values you specify for int-a and int-b/failover are the same. If you modify the netmask value of one, modify the other.
3. In the Netmask field, type a netmask value.
   You cannot modify the netmask value if the change invalidates any node addresses.
4. Click Submit.
   A dialog box prompts you to reboot the cluster.
5. Specify when you want to reboot the cluster.
   • To immediately reboot the cluster, click Yes. When the cluster finishes rebooting, the login page appears.
   • Click No to return to the Edit Internal Network page without changing the settings or rebooting the cluster.