
SIGNAMAX a.s.
Office: Vlarska 22, 627 00 Brno, CZ
T:+420 533 338 854 l F:+420 533 338 883 l www.signamax.eu
91
4. 802.1q Protocol VLAN: Configure which protocols are used to divide VLANs.
5. Management VLAN: Configure which port(s) are management ports.
6. Prot-based VLAN: Configure Port-based VLAN rules.
4.3.9.1 802.1q Tag VLAN
Select the option 802.1q Tag VLAN from the VLAN Configuration menu and then the
following screen page appears.
VLAN Mode: When enabled, the forwarding decision will depend on the tag attached in
frames. When disabled, the forwarding decision will depend on each port’s PVID setting.
Ingress Filter: To enable or disable ingress filter. When enabled, ingress traffic from a
certain port that is a member port of a VLAN will be forwarded to other member ports in the
same VLAN; otherwise, they will be dropped (ingress traffic from a VLAN is not a member
port of that VLAN). When disabled, ingress traffic will be forwarded to other member ports
that are in the same VLAN. See below for an example.
Ingress Filter is enabled
When Ingress Filter is enabled and traffic with VID 100 is from port 21, the Managed
Switch will check the “802.1qVLAN Table” before forwarding packets to other member
ports. In the figure provided below, Port 21 where traffic comes from is a member of
VLAN 100. Therefore, traffic from Port 21 will be forwarded to other member ports;
these are Port 22, 23, 24.
Port 21 is a member in VLAN 100: