User`s guide

Signamax

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065-7726SPOE / 065-7726SPOE-FP 24-Port 10/100BaseT/TX

PoE Managed Switch User Manual

Publication date: February 2010

Revision A1.0

Symmetric Vlan:

This is an 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 disabled, it means the 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.

Fig. 3-21

3-7-2. Tag-based Group

Function name: