The options should be configured the same for every LSR for this Layer 2 VPN in order to prevent connectivity issues. Specifying the dot1q ethertype forces the switch to overwrite the dot1q ethertype value in the service packet. This can be used to interconnect two customer segments over the Layer 2 VPN that are using different configured ethertype values. By default, the dot1q tag in the service packet is not included. The switch can be configured to strip or exclude the dot1q tag. This can be used to emulate port services or for interoperability with equipment that may require tags.
This command resets the dot1q ethertype for the specified Layer 2 VPN to the default ethertype configured for the switch.