PowerProtect Data Manager 19.9 Network Attached Storage User Guide

Change the protection engine Docker network range

The NAS protection engine contains a private Docker network that operates within the 10.255.255.0/24 address range. If this range conflicts with your network, NAS backups can fail. In this case, change the Docker network range to another subnet.

1. Connect to the NAS protection engine console and change to the root user.
2. Using a Linux text editor, open the /etc/sysconfig/docker configuration file.
3. Locate the DOCKER_OPTS line.
4. Change the IP address range to a value that does not conflict with your network.
   For example, DOCKER_OPTS="--bip=192.168.2.1/24"
5. Save and close the configuration file.
6. Restart the Docker service:
   systemctl restart docker.service
7. Verify that the private Docker network uses the new IP address range:
   ifconfig docker0

   docker0   Link encap:Ethernet  HWaddr 02:42:C8:22:4A:A3
       inet addr:192.168.2.1  Bcast:192.168.2.255  Mask:255.255.255.0
       inet6 addr: fe80::42:c8ff:fe22:4aa3/64 Scope:Link
       UP BROADCAST MULTICAST  MTU:1500  Metric:1
       RX packets:998 errors:0 dropped:0 overruns:0 frame:0
       TX packets:886 errors:0 dropped:0 overruns:0 carrier:0
       collisions:0 txqueuelen:0
       RX bytes:286110 (279.4 Kb)  TX bytes:1037418 (1013.1 Kb)

   The Docker bridge should use the first IP address from the new range. All other Docker interfaces obtain IP addresses from the new range.