LevelOne FGP-2472, User Manual

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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 Port 1&2&3&4. If
you are on the port 1, you can communicate with port 2&3&4. If you
are on the port 5, then you cannot talk to them. Each port-based
VLAN you built up must be assigned a group name. This switch can
support up to maximal 26 port-based VLAN groups.
Metro Mode:
The Metro Mode is a quick configuration VLAN environment
method on Port-based VLAN. It will create 9 or 10 Port-based
VLAN groups.
Symmetric Vlan:
This is a Ingress Rule (Rule 1, The Ingress Filtering Rule 1 is “forward
only packets with VID matching this port’s configured VID”.). For example,
if port 1 receives a tagged packet with VID=100 (VLAN name=VLAN100),
and if Symmetric-Vlan function
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.
Note: If Symmetric 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 not 100, the
packet will be dropped.
SVL:
While SVL is enable, all VLANs use the same filtering database storing
the membership information of the VLAN to learn or look up the
membership information of the VLAN. While SVL is disable, it means
learning mode is IVL. In this mode, different VLAN uses different filtering
database storing the membership information of the VLAN to learn or
look up the information of a VLAN member.
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.
Up-link Port:
This function is enabled only when metro mode is chosen in VLAN mode.
25:
Except Port 25, each port of the switch cannot transmit packets
with each other. Each port groups a VLAN with Port 25, thus, total
8 groups consisting of 2 members are formed.