Enabling short-reach mode for individual as well as a range of other interfaces helps in reducing power consumption on these interfaces. However, some interfaces do not support this feature. This article shows how to clear the commit error " et-interface does not support this feature " that is logged when trying to enable this mode on such interfaces.

When configuring short reach mode on an Ethernet interface, the following commit error is reported:

root@qfx5100-48t# show chassis
aggregated-devices {
    ethernet {
        device-count 2;
    }
}
fpc 0 {
    pic 0 {
        port 48 {
            short-reach-mode enable;
        }
    }
}

{master:0}[edit]
root@qfx5100-48t# commit
[edit chassis fpc 0 pic 0 port 48 short-reach-mode]
  'short-reach-mode enable'
    et-interface does not support this feature
error: configuration check-out failed 

The short-reach feature is supported only on copper-based 10-Gigabit Ethernet interfaces that use short cable lengths (less than 10m) on the QFX5100-48T switch.

To be able to commit without an error, disable the feature on unsupported and unwanted ports by using the following command:

{master:0}[edit]
root@qfx5100-48t# show chassis
fpc 0 {
    pic 0 {
        port 48 {
            short-reach-mode disable;
        }
        port-range 20 27 {
            short-reach-mode enable;
        }
    }
}