AFM IPv6 Support

Internet Protocol Version 6 (IPv6) is the protocol that is designed by the IETF to replace Internet Protocol Version 4 (IPv4). Active File Management (AFM) fileset now supports connectivity and administration over IPv6.

AFM, AFM-based asynchronous disaster recovery (AFM DR), and AFM to cloud object storage fileset supports connectivity and administration over IPv6. The IBM Storage Scale cluster can be configured to use its daemon and admin communication over IPv6 addresses.

AFM gateway nodes and mapping support IPv6 address as well. After the IBM Storage Scale cluster is set up for using IPv6 as its network, filesets can be created by using these IPv6 addresses. Also, the filesets can be converted to use IPv6 addresses by using mmafmctl failover –target-only option and AFM DR filesets can be converted to use IPv6 by using mmafmctl ChangeSecondary --target-only option.

To set up IPv6 support for IBM Storage Scale cluster, see Enabling a cluster for IPv6.

To change IP addresses or hostnames of cluster nodes, see Changing IP addresses or host names of cluster nodes.

Important: The IPv6 addresses must be mentioned in the square brackets when the IPv6 is configured with the AFM-related commands.

Examples

  1. Setting a remote cluster AFM target as IPv6.
    mmcrfileset fs2 drp-fset-2 --inode-space=new -p afmtarget=[2001:192::321:5eff:febf:a69b]:/gpfs/fs1/drs-fset-2 -p afmmode=primary
    The output looks similar to the following as shown:
    
Fileset drp-fset-2 created with id 258 root inode 63963139.
Primary Id (afmPrimaryId) 134157187695697640-C0A876075E27E51D-258
  2. Verifying fileset status.
    mmafmctl fs1 getstate
    The output looks similar to the following as shown:
    
Fileset Name    Fileset Target                                Cache State          Gateway Node    Queue Length   Queue numExec 
------------    --------------                                -------------        ------------    ------------   ------------- 
obj1            https://s3.amazonaws.com:443/mufileset        Active               c7f2n04         0              143119       
ip1             nfs://[2001:192::310:18ff:fec6:ecd8]/fileset  Active               c7f2n03         0              1167977      
ip2             nfs://[2001:192::310:18ff:fec6:ecd8]/fileset1 Active               c7f2n03         0              524752
Note: To verify whether the hostname resolves to an IPv6 addresses, use mmcmi host <hostname> command.