DELL 8132 ユーザーズマニュアル

VLAN Commands

its own VLAN. Additionally, protocol-based classification allows an 

administrator to assign nonrouting protocols, such as NetBIOS or DECnet, to 

larger VLANs than routing protocols like IPX or IP. This maximizes the 

efficiency gains that are possible with VLANs. 
In port-based VLAN classification, the Port VLAN Identifier (PVID) is 

associated with the physical ports. The VLAN ID (VID) for an untagged 

packet is equal to the PVID of the port. In port-and protocol-based VLAN 

classifications, multiple VIDs are associated with each of the physical ports. 

Each VID is also associated with a protocol. The ingress rules used to classify 

incoming packets include the use of the packet's protocol, in addition to the 

PVID, to determine the VLAN to which the packet belongs. This approach 

requires one VID on each port for each protocol for which the filter is desired.

This feature allows an untagged packet to be placed in a configured VLAN 

based upon its IP address.

This feature allows an untagged packet to be placed in a configured VLAN 

based upon its MAC address.

The PowerConnect Private VLAN feature separates a regular VLAN domain 

into two or more sub-domains. Each sub-domain is defined (represented) by 

a primary VLAN and a secondary VLAN. The primary VLAN ID is the same 

for all sub-domains that belong to a private VLAN. The secondary VLAN ID 

differentiates sub-domains from each another and provides Layer 2 isolation 

between ports of the same private VLAN. There are the following types of 

VLANs within a private VLAN:

• Primary VLAN

Forwards the traffic from the promiscuous ports to isolated ports, 

community ports and other promiscuous ports in the same private VLAN. 

Only one primary VLAN can be configured per private VLAN. All ports 

within a private VLAN share the same primary VLAN.

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