Alloy Computer Products GSM-8T16SFP, GSM-24T2SFP, GSM-16T2SFP user manual Tag Rule

GSM Series User Manual

3-10-4. Tag Rule

Fig. 3-40

Function name: Tag Rule

Function description:

The administrator can apply a VID to each port of the switch; the valid range of the VID is from 1 to 4094. Ingress filtering rules can also be applied to each port, there are two rules that can be applied Rule 1 “Forward only packets with VID matching this ports configured VID” and Rule 2 “Drop untagged frame”. The role of each port can also be selected as Access, Trunk and Hybrid.

Parameters description:

Port No:

Select the port you wish to apply a VLAN Tag Rule.

PVID:

PVID range is 1 – 4094. Before you configure a PVID you must create a Tag- based VLAN with the VID matching the PVID you are about to create. For example, if port x receives an untagged packet, the switch will apply the PVID of port x to this packet, the packet will then be forwarded as a tagged packet with the VID you have created.

Rule 1:

Forward only packets with VID matching this ports configured VID. You can apply Rule 1 as a way to filter unwanted traffic. In Rule 1, a given port checks if the given port is a member of the VLAN on which the received packet belongs to, to determine whether the packet will be forwarded or not. For example, if port 1 receives a tagged packet with VID=100, and Rule 1 is enabled, the switch will check if port 1 is a member of VLAN100. If yes, the received packet is forwarded: otherwise, the received packet is dropped.

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