The following are the configuration guidelines for Dot1q-Etype configured for dot1q encap port on 7210 SAS-D and 7210 SAS-Dxp:
Dot1q-Etype configuration is supported for all ports - Access and Access-uplink ports.
Dot1q-preserve SAPs cannot be configured on dot1q encap ports configured to use ether type other than 0x8100.
Priority tagged packet received with Etype 0x8100 on a dot1q port configured with Etype 0x9100 are classified as priority tagged packet and mapped to a dot1q :0 SAP (if configured) and the priority tag is removed.
Priority tagged packets received with Etype 0x6666 (any value other than 0x8100) on a dot1q port configured with Etype 0x9100 is classified as null-tagged packet and mapped to a dot1q :0 SAP (if configured) and the priority tag is retained and forwarded.
The dot1q-Etype is modified only for the dot1q encap access port.