Instruction manual

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3.2.5.2 Null VID Replacement (per port setting)
The null VID of a Null VID packet will be replaced with the associated ingress port’s PVID. This
setting still works even Egress Tag rule : [PVID insertion for untagged packets only] is selected.
3.2.6 Summary of VLAN Function
Number of VLAN groups : 8 groups at the same time
VLAN ID supported : 1 ~ 4095 (12-bit VID)
VLAN mode options : 802.1Q Tag Aware VLAN, Port-based
Ingress rules :Ingress Member Filtering (global setting)
Unmatched VID Filtering (per port setting)
Egress Tagging rules : Egress Tag Rule (per port setting)
- Tagging with PVID for all packets
- Untagging for all packets
- PVID insertion for untagged packets only
- No tag insertion and tag removal
Null VID Replacement (per port setting)
3.3 Redundant Ring Function
For industrial applications, multiple switches are often connected like a cascaded chain due to topology
limitation. In such configuration, a backup (redundant) mechanism with fast respone is also required to
keep the network operating when any cable fault or even device fault occur.
3.3.1 Configuration Definition
Slave Units: All switch units except the master switch in a ring configuration
Master Unit: The unit which monitors the ring configuration and controls the backup link
Ring Ports: The ports used for connecting ring switch units
Backup Port: The port specified in the master unit which is connected with physical cable but is
disabled in operation of standby state. It is enabled immediately when a fault is
detected by the master unit.