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DES-7200 Configuration Guide Chapter 7 Protocol VLAN Configuration
7-1
7 Protocol VLAN
Configuration
7.1 Protocol VLAN
Technology
Every packet received on a port of the device should be classified and added to
an unique VLAN. There are three possibilities:
1. If the packet has no VLAN ID (for instance, UNTAG or Priority packet ), and
the device only supports port-based VLAN classification, the VLAN ID in the tag
added to the packet is the PVID of the inbound port.
2. If the packet has no VLAN ID (for instance, UNTAG or Priority packet), and
the device supports protocol type-based VLAN classification, one of the VLAN
IDs corresponding to the protocol suite configured on the inboud port will be
selected as the VLAN ID in the tag added to the packet. However, if the protocol
type of the packet matches none of the protocol suite configured on the inbound
port, the VLAN ID will be assigned by port-based VLAN classification.
3. If the packet is tagged, its VLAN is determined by the VLAN ID in the tag.
As a protocol type-based VLAN classification technology, the protocol VLAN
classifies the packets that have no VLAN ID and be of the same protocol type to
the same VLAN.
The protocol VLAN configuration takes effect for Trunk port and Hybrid port, not
for the Access port.
DES-7200 products support both global IP address-based VLAN classification,
and packet type and Ethernet type-based VLAN classification on a port.
Because IP address-based VLAN classification is a global configuration, once
configured, it will apply to all trunk ports and Hybrid ports.
1. If the incoming packet has no VLAN ID, and its IP address matches the
configured IP address, this packet will be classify into the configured VLAN.
2. If the incoming packet has no VLAN ID, and its packet type and Ethernet type
match those you configured on the inbound port respectively, this packet will be
classified into the configured VLAN.