5. Support for IPv6

5.1. IPv6-enabled network

Check with network admin that your networks support IPv6.

5.2. IPv6-enabled hosts

Below we that assume your hosts run Red Hat Enterprise Linux or variants.

  1. Verify your host OS supports IPv6.

    • Check for IPv6 support in the currently running kernel:

      $ cat /proc/net/if_inet6

    • Enable IPv6 by editing /etc/modprobe.d/ipv6.conf, if necessary:

      options ipv6 disable=0

    • Load ipv6 module if necessary:

      $ sudo lsmod | grep ipv6
$ sudo modprobe ipv6

  2. Verify your host NIC is configured to support IPv6. Obtain IPv6 address from network admin and configure the corresponding ifcfg file in /etc/sysconfig/network-scripts:

    IPV6INIT="yes"
IPV6ADDR="2620:6a:0:2::2:57"
IPV6_DEFAULTGW="2620:6a:0:2::2:1"
IPV6_AUTOCONF="no"

  3. The host ipv6 firewall should be configured accordingly.

  4. Restart the host (highly recommended)

5.3. mdtmFTP command line

After network and hosts are configured, you can do data transfer over IPv6 by adding -ipv6 option to mdtmFTP client’s command line. For example:

$ sudo docker run \
              -ti --rm \
              --net=host \
              -v `pwd`:/mdtmwork \
              publicregistry.fnal.gov/bigdata_express/mdtmftp:1.1.1-xenial \
              mdtm-ftp-client -ipv6 -vb -p 16 \
              ftp://mdtmftp:123456@dtn-a.example.net:5050//data1/10G.bin \
              ftp://mdtmftp:123456@dtn-b.example.net:5050/dev/null