Copying the Running or Startup Configuration to an IPv6 TFTP Server
You can copy a device running or startup configuration to an IPv6 TFTP server. The following example copies a device running configuration to a TFTP server with the IPv6 address of 2001:DB8:e0ff:7837::3 and names the destination file bakrun.cfg.
device# copy running-config tftp 2001:DB8:e0ff:7837::3 bakrun.cfg Parameter Validation Successful ....File Upload Complete