| best_effort_vlan_filtering | |
| [DEVICE, DRIVER-SPECIFIC] | |
| Allow plain ETH_P_8021Q headers to be used as DSA tags. | |
| Benefits: | |
| - Can terminate untagged traffic over switch net | |
| devices even when enslaved to a bridge with | |
| vlan_filtering=1. | |
| - Can terminate VLAN-tagged traffic over switch net | |
| devices even when enslaved to a bridge with | |
| vlan_filtering=1, with some constraints (no more than | |
| 7 non-pvid VLANs per user port). | |
| - Can do QoS based on VLAN PCP and VLAN membership | |
| admission control for autonomously forwarded frames | |
| (regardless of whether they can be terminated on the | |
| CPU or not). | |
| Drawbacks: | |
| - User cannot use VLANs in range 1024-3071. If the | |
| switch receives frames with such VIDs, it will | |
| misinterpret them as DSA tags. | |
| - Switch uses Shared VLAN Learning (FDB lookup uses | |
| only DMAC as key). | |
| - When VLANs span cross-chip topologies, the total | |
| number of permitted VLANs may be less than 7 per | |
| port, due to a maximum number of 32 VLAN retagging | |
| rules per switch. | |
| Configuration mode: runtime | |
| Type: bool. |