Waters Network Systems
User’s Manual
Page 57
GSM-2116 and GSM-2124
Port-based:
Port-based VLAN is defined by port. Any packet coming in or out from any one port of a
port-based VLAN will be accepted. No filtering criterion applies in port-based VLAN. The
only criterion is the physical port you connect to. For example, for a port-based VLAN
named PVLAN-1 contains port members Ports 1, 2, 3 & 4, and if you are connected to Port
1, you can communicate with Port 2-4. If you are connected to Port 5, you cannot
communicate with those ports. Each port-based VLAN must be assigned a group name.
This switch can support up to a maximum of 8 port-based VLAN groups.
Tag-based:
Tag-based VLAN identifies its member by VID. Tag-based VLANs are different from port-
based VLANs. If there are additional rules in ingress filtering list or egress filtering list, the
packet will be screened with filtering criteria to determine if it can be forwarded. The switch
supports 802.1q.
Each tag-based VLAN must be assigned a VLAN name and VLAN ID. Valid VLAN ID is 1-
4094. You may create total up to 64 Tag VLAN groups.
Metro Mode:
The Metro Mode is a quick configuration VLAN environment method on Port-based VLAN.
You can create 14 or 15 port-based VLAN groups.
Double-tag:
Double-tag mode belongs to the tag-based mode, however, it would treat all frames as the
untagged ones, which means that tag with PVID will be added into all packets. Then, these
packets will be forwarded as Tag-based VLAN. So, the incoming packets with tag will
become the double-tag ones.
Figure 5.29 – VLAN Mode
Up-link Port:
This function is enabled only when metro mode is chosen in VLAN mode.
Port 15 (23):
Except Port 15 (23), the switch ports cannot transmit packets with each other. Each port
groups a VLAN with Port 5, thus, fifteen (twenty three) groups consisting of two members
are formed.
Port 16 (24):
Except Port 16 (24), the switch ports cannot transmit packets with each other. Each port