Microsens MS453522M - Manual (Page 88)

MICROSENS 8 Port Gigabit Ethernet Switch User’s Manual
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3-10-4. Tag Rule
Function name:
Tag Rule
Function description:
In VLAN Tag Rule Setting, user can input VID number to each port. The range of VID
number is from 1 to 4094. User also can choose ingress filtering rules to each port. There
are two ingress filtering rules which can be applied to the switch. The Ingress Filtering Rule
1 is “forward only packets with VID matching this port’s configured VID”. The Ingress
Filtering Rule 2 is “drop untagged frame”. You can also select the Role of each port as
Access, Trunk, or Hybrid.
Parameter description:
Port 1-8:
Port number.
PVID:
This PVID range will be 1-4094. Before you set a number x as PVID, you have to create
a Tag-based VLAN with VID x. For example, if port x receives an untagged packet, the
switch will apply the PVID (assume as VID y) of port x to tag this packet, the packet
then will be forwarded as the tagged packet with VID y.
Rule 1:
Forward only packets with VID matching this port’s configured VID. You can apply
Rule 1 as a way to a given port 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 forward it or not. For example, if port 1 receives a tagged
packet with VID=100 (VLAN name=VLAN100), and if 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.
Rule 2:
Drop untagged frame. You can configure a given port to accept all frames (Tagged
and Untagged) or just receive tagged frame. If the former is the case, then the
packets with tagged or untagged will be processed. If the later is the case, only the
packets carrying VLAN tag will be processed, the rest packets will be discarded.
Note: If Rule 1 is enabled and port 1, for example, receives an untagged packet, the switch will
apply the PVID of port 1 to tag this packet, the packet then will be forwarded. But if the
PVID of port 1 is 100 and port 1 is not member of VLAN 100, the packet will be dropped.