VLAN Transfer VLAN Nesting

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What do you mean by VLAN transmission?

It doesn't matter what you come up with, I'll let you through. This explains the type of data, no matter what the data.

Why there is the concept of VLAN transmission.

The purpose of the original VLAN is to isolate, the data of different VLANs is not allowed to pass. Play a role in data isolation.

But sometimes, I want to become a straight-through data, so I need to let my data all pass, so there is VLAN passthrough.

VLAN transmission configuration.

1. Uplink and downlink port configuration port mode is transparent mode

2, the entrance joins to the Vlan1 port to Pvid 1

3, the export joins to the Vlan1 out port Untag

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VLAN conversion

Port mode.

1. Hybrid mode

2. Transparent mode

In transparent mode allows for

A, VLAN conversion

B, two-tier VLAN

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VLAN conversion

From the see, the port is divided into two directions, a ingress, a egress, each with a table to be maintained.

Port VLAN Tagged

This command is the configured egress table, which means that data from this port will be vlan100

Port Modified-vlan 10 100 1

This command configures the Ingress table, which means that VLAN 10 is converted to VLAN 100.

VLAN transmission and VLAN conversion exist in parallel,

The data I came up with are vlan9 and VLAN 10

The port is configured as the transparent mode,

VLAN 10 configuration VLAN converted to VLAN 100

But Vlan9 's data will also go through the port.

This illustrates VLAN conversion, where VLAN transmission is parallel.

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VLAN nesting

VLAN nesting, is a two-tier VLAN, the upstream of the data at the entrance with a Cvlan, and then into the port after the change, will take the Svlan, and then through the port when the tag,

The data is then brought up with two layers of VLANs.

To summarize,

VLAN transmission, VLAN conversion, VLAN nesting, should all be done under Port mode for transparent mode.

And in the ingress direction, the data that comes up with VLAN, can only do one of the above three kinds of ways. means that

The data come up in port mode for transparent mode, only do VLAN transmission, VLAN conversion, VLAN nesting three one,

cannot be nested again, and converted.

If the data on the upstream needs to be differentiated, VLAN conversion and VLAN nesting are needed, ACLs are required.

VLAN Transfer VLAN Nesting