Alloy Computer Products GSM-8T16SFP - Manual (Page 70)

GSM Series User Manual
66
Alloy Computer Products Pty Ltd Copyright ©2006
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.