set eth eth1 loopback-mode internal-mac-swap
Line external loopback
set eth eth1 loopback-mode external-mac-swap
RF loopback timeout
set rf loopback internal-mac-swap qam64 4 1 0.5
set eth eth1 loopback-mode external-mac-swap
Use the following command to clear the loopback:
set eth eth1 loopback-mode disable