How to transparently transmit untagged packets on the MA5620G and the OLT?
Versions: OLT MA5600T V800R005C33B118SPH001
ONT MA5620G V800R305C02B133
On the MA5620G side:
The MA5620G V800R305 supports the VLAN transparent transmission based on the Ethernet port. The VLAN transparent transmission has two modes, which cannot coexist on the Ethernet port. In addition, after the physical port is set to support VLAN transparent transmission for service streams, the physical port cannot be set to support VLAN switching (C-VLAN and S-VLAN) for service streams.
1. On the MA5620G, complete transparent transmission can be set for the untagged packets received by the port through the service-port VLAN “transparent” eth 0/1/2 other-all rx-cttr 6 tx-cttr 6 command. This setting, however, has a problem. That is, the packets thus sent from the upstream port of the MA5620G are untagged, which cannot be distinguished by the GPBC board. Furthermore, related GEM port mapping cannot be configured on the OLT. This is because the MA5620G does not support port mapping (if the ONT/MxU supports port mapping, the untagged packets can be distinguished by the OLT). Therefore, it is currently meaningless for the MA5620G to transparently transmit untagged packets. The service-port VLAN “transparent” eth 0/1/2 other-all rx-cttr 6 tx-cttr 6 command is useful only for the scenario that requires the transparent transmission of tagged packets.
2. On the MA5620G, untagged can be selected in user-vlan. After the setting, the untagged packets that arrive through the Ethernet port of the MA5620G will be mapped to the S-VLAN of the service port, and will go upstream through the upstream PON port of the MA5620G. In this way, the packets tagged with S-VLAN can be distinguished by the OLT.
3. QinQ VLAN can also be used on the MA5620G. Thus, the MA5620G adds an outer VLAN tag to both tagged and untagged packets that arrive through the Ethernet port of the MA5620G. After the packets with outer S-VLAN tags are sent to the OLT through the upstream port of the MA5620G, the OLT can also map and process the packets according to the outer S-VLAN tag.
On the OLT side:
Currently, the OLT supports mapping based on the following:
4. Port ID (This type of mapping needs to be supported by the MxU or the ONT; it is not supported by the MA5620G.)
5. Encapsulation (Encapsulation is not involved in the case of GPON.)