# Disabling IPv6 Communication on HyperScale 1.5 Appliance

`rpcbind.socket` will not start with IPv6 disabled and as a result storage pool may not be online once the Hyperscale node is rebooted.

## Before You Begin

If IPv6 was already enabled as described in Enabling IPv6 Communication on HyperScale Nodes, make sure to revert the changes to the `ifcfg-*` files.

## Procedure

1. Add the following entry in `/etc/sysctl.conf` file.

       net.ipv6.conf.all.disable_ipv6 = 1

2. Rebuild the initial ramdisk image ( initrd or initramfs) using the following command to incorporate the changes made to `/etc/sysctl.conf` into the initramfs.

       dracut -v -f

3. Edit the `/etc/hosts` file and remove lines containing `::1`.

4. Reboot the node.

   You will see the rpcbind.socket running with IPV6 in disabled state.

5. Repeat these steps on the other nodes in the storage pool.

## Additional Information

- https://access.redhat.com/solutions/2798411

- https://nigelb.me/2019-01-29-getting-rpcbind-to-work-without-ipv6

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