The customer want to use Huawei SSN1EFT8 and SSN5EFS0 to transfer the LAG protocol of two DSLAM equipment. The customer want to enable the LAG function
on the two DSLAM, and disable the LAG function on the SSN1EFT8 and SSN5EFS0 boards. The SSN1EFT8 and SSN5EFS0 boards are just used for translation. But
the customer found that when they enabled the LAG function on the DSLAM equipment, the service is down. The service packets between the DSLAM include the
VLAN, so the ports parameter for the DSLAM and for the EFS0's external port and internal port, it is "TAG Aware". The service on the N5EFS0 is EPL without VLAN.
DSLAM5600 A======N1EFT8========N5EFS0=====DSLAM5600 B
1, when we enabled the LAG function on the two DSLAM, we found that the service is down;
2, After we disabled the LAG function on the two DSLAM, both of the two service are OK;
3, Enabled the LAG function again, the service was down again;
4, Seting the internal ports and external ports as hybrid, the service was still down;
5. Seting the internal ports and external ports as hybrid, and disabled the "Port Detecting function" of the N5EFS0, the service is OK with the LAG function.
1, for the LAG protocol frame, it will not include the VLAN, and for the service frame, it include the VLAN. so for the external and internal ports of the EFS0 should be
2, For the N5EFS0 board, the "port detecting function" is enabled by default. It will drop some protocol frame coming into such port, including the LAG protocl protocol.
So we should disable the "port detecting function". If we use N4EFS0/N2EFS0/N1EFS0, the "port detecting function" will not drop the LAG protocol frame.