Chapter 1 Vlan-Vpn Configuration; Vlan-Vpn Overview; Introduction To Vlan-Vpn; Implementation Of Vlan-Vpn - H3C S3600 Series Operation Manual

Operation Manual – VLAN-VPN
H3C S3600 Series Ethernet Switches-Release 1510

Chapter 1 VLAN-VPN Configuration

1.1 VLAN-VPN Overview

1.1.1 Introduction to VLAN-VPN

The VLAN-VPN function enables packets to be transmitted across the operators'
backbone networks with VLAN tags of private networks encapsulated in those of public
networks. In public networks, packets of this type are transmitted by their outer VLAN
tags (that is, the VLAN tags of public networks). And those of private networks which
are encapsulated in the VLAN tags of public networks are shielded.
Figure 1-1 describes the structure of the packets with single-layer VLAN tags.
DA DA DA DA DA DA DA DA DA DA DA DA DA DA DA DA DA DA DA DA DA DA DA DA DA DA DA DA DA DA DA DA DA DA DA DA DA DA DA DA DA DA DA DA DA DA
(6B) (6B) (6B) (6B) (6B) (6B) (6B) (6B) (6B) (6B) (6B) (6B) (6B) (6B) (6B) (6B) (6B) (6B) (6B) (6B) (6B) (6B) (6B) (6B) (6B) (6B) (6B) (6B) (6B) (6B) (6B) (6B) (6B) (6B) (6B) (6B) (6B) (6B) (6B) (6B) (6B) (6B) (6B) (6B) (6B) (6B)
Figure 1-1 Structure of packets with single-layer VLAN tags
Figure 1-2 describes the structure of the packets with nested VLAN tags.
DA DA DA DA DA DA DA DA DA DA DA DA DA DA DA DA DA DA DA DA DA DA DA DA DA DA DA DA DA DA DA DA DA DA DA DA DA DA DA DA DA DA DA DA DA DA
(6B) (6B) (6B) (6B) (6B) (6B) (6B) (6B) (6B) (6B) (6B) (6B) (6B) (6B) (6B) (6B) (6B) (6B) (6B) (6B) (6B) (6B) (6B) (6B) (6B) (6B) (6B) (6B) (6B) (6B) (6B) (6B) (6B) (6B) (6B) (6B) (6B) (6B) (6B) (6B) (6B) (6B) (6B) (6B) (6B) (6B)
Figure 1-2 Structure of packets with double-layer VLAN tags
Compared with MPLS-based Layer 2 VPN, VLAN-VPN has the following features:
It provides Layer 2 VPN tunnels that are simpler.
VLAN-VPN can be implemented without the support of signaling protocols. You
can enable VLAN-VPN by static configuration.
The VLAN-VPN function provides you with the following benefits:
Saves public network VLAN ID resource.
You can have VLAN IDs of your own, which is independent of public network
VLAN IDs.
It allows for simple Layer 2 VPN solutions for small-sized MANs or intranets.

1.1.2 Implementation of VLAN-VPN

VLAN-VPN can be implemented by enabling the VLAN-VPN function on ports.
With the VLAN VPN function enabled, a received packet is tagged with the default
VLAN tag of the receiving port no matter whether or not the packet already carries a
VLAN tag. If the packet already carries a VLAN tag, the packet becomes a dual-tagged
SA SA SA SA SA SA SA SA SA SA SA SA SA SA SA SA SA SA SA SA SA SA SA SA SA SA SA SA SA SA SA SA SA SA SA SA SA SA SA SA SA SA SA SA SA SA
User VLAN Tag(4B) User VLAN Tag(4B) User VLAN Tag(4B)
(6B) (6B) (6B) (6B) (6B) (6B) (6B) (6B) (6B) (6B) (6B) (6B) (6B) (6B) (6B) (6B) (6B) (6B) (6B) (6B) (6B) (6B) (6B) (6B) (6B) (6B) (6B) (6B) (6B) (6B) (6B) (6B) (6B) (6B) (6B) (6B) (6B) (6B) (6B) (6B) (6B) (6B) (6B) (6B) (6B) (6B)
SA SA SA SA SA SA SA SA SA SA SA SA SA SA SA SA SA SA SA SA SA SA SA SA SA SA SA SA SA SA SA SA SA SA SA SA SA SA SA SA SA SA SA SA SA SA
Nested VLAN Nested VLAN Nested VLAN Nested VLAN Nested VLAN
(6B) (6B) (6B) (6B) (6B) (6B) (6B) (6B) (6B) (6B) (6B) (6B) (6B) (6B) (6B) (6B) (6B) (6B) (6B) (6B) (6B) (6B) (6B) (6B) (6B) (6B) (6B) (6B) (6B) (6B) (6B) (6B) (6B) (6B) (6B) (6B) (6B) (6B) (6B) (6B) (6B) (6B) (6B) (6B) (6B) (6B)
Tag(4B) Tag(4B) Tag(4B)
Chapter 1 VLAN-VPN Configuration
ETYPE ETYPE ETYPE ETYPE ETYPE ETYPE ETYPE ETYPE ETYPE ETYPE ETYPE ETYPE ETYPE ETYPE ETYPE ETYPE ETYPE ETYPE ETYPE ETYPE ETYPE ETYPE ETYPE ETYPE ETYPE ETYPE ETYPE ETYPE ETYPE ETYPE ETYPE ETYPE ETYPE ETYPE ETYPE ETYPE ETYPE ETYPE ETYPE ETYPE ETYPE ETYPE ETYPE ETYPE ETYPE ETYPE
(2B) (2B) (2B) (2B) (2B) (2B) (2B) (2B) (2B) (2B) (2B) (2B) (2B) (2B) (2B) (2B) (2B) (2B) (2B) (2B) (2B) (2B) (2B) (2B) (2B) (2B) (2B) (2B) (2B) (2B) (2B) (2B) (2B) (2B) (2B) (2B) (2B) (2B) (2B) (2B) (2B) (2B) (2B) (2B) (2B) (2B)
User VLAN User VLAN User VLAN User VLAN User VLAN ETYPE ETYPE ETYPE ETYPE ETYPE ETYPE ETYPE ETYPE ETYPE ETYPE ETYPE ETYPE ETYPE ETYPE ETYPE ETYPE ETYPE ETYPE ETYPE ETYPE ETYPE ETYPE ETYPE ETYPE ETYPE ETYPE ETYPE ETYPE ETYPE ETYPE ETYPE ETYPE ETYPE ETYPE ETYPE ETYPE ETYPE ETYPE ETYPE ETYPE ETYPE ETYPE ETYPE ETYPE ETYPE ETYPE
Tag(4B) Tag(4B) Tag(4B) (2B) (2B) (2B) (2B) (2B) (2B) (2B) (2B) (2B) (2B) (2B) (2B) (2B) (2B) (2B) (2B) (2B) (2B) (2B) (2B) (2B) (2B) (2B) (2B) (2B) (2B) (2B) (2B) (2B) (2B) (2B) (2B) (2B) (2B) (2B) (2B) (2B) (2B) (2B) (2B) (2B) (2B) (2B) (2B) (2B)
1-1
DATA DATA DATA DATA DATA DATA DATA DATA DATA DATA DATA DATA DATA DATA DATA DATA DATA DATA DATA DATA DATA DATA DATA DATA DATA DATA DATA DATA DATA DATA DATA DATA DATA DATA DATA DATA DATA DATA DATA DATA DATA DATA DATA DATA DATA DATA FCS FCS FCS FCS FCS FCS FCS FCS FCS FCS FCS FCS FCS FCS FCS FCS FCS FCS FCS FCS FCS FCS FCS FCS FCS FCS FCS FCS FCS FCS FCS FCS FCS FCS FCS FCS FCS FCS FCS FCS FCS FCS FCS FCS FCS FCS
(0~1500B) (0~1500B) (0~1500B) (0~1500B) (0~1500B) (0~1500B) (0~1500B) (0~1500B) (0~1500B) (0~1500B) (0~1500B) (0~1500B) (0~1500B) (0~1500B) (0~1500B) (0~1500B) (0~1500B) (0~1500B) (0~1500B) (0~1500B) (0~1500B) (0~1500B) (0~1500B) (4B) (4B) (4B) (4B) (4B) (4B) (4B) (4B) (4B) (4B) (4B) (4B) (4B) (4B) (4B) (4B) (4B) (4B) (4B) (4B) (4B) (4B) (4B) (4B) (4B) (4B) (4B) (4B) (4B) (4B) (4B) (4B) (4B) (4B) (4B) (4B) (4B) (4B) (4B) (4B) (4B) (4B) (4B) (4B) (4B) (4B)
DATA DATA DATA DATA DATA DATA DATA DATA DATA DATA DATA DATA DATA DATA DATA DATA DATA DATA DATA DATA DATA DATA DATA DATA DATA DATA DATA DATA DATA DATA DATA DATA DATA DATA DATA DATA DATA DATA DATA DATA DATA DATA DATA DATA DATA FCS FCS FCS FCS FCS FCS FCS FCS FCS FCS FCS FCS FCS FCS FCS FCS FCS FCS FCS FCS FCS FCS FCS FCS FCS FCS FCS FCS FCS FCS FCS FCS FCS FCS FCS FCS FCS FCS FCS FCS FCS FCS FCS FCS FCS
(0~1500B) (0~1500B) (0~1500B) (0~1500B) (0~1500B) (0~1500B) (0~1500B) (0~1500B) (0~1500B) (0~1500B) (0~1500B) (0~1500B) (0~1500B) (0~1500B) (0~1500B) (0~1500B) (0~1500B) (0~1500B) (0~1500B) (0~1500B) (0~1500B) (0~1500B) (0~1500B) (4B) (4B) (4B) (4B) (4B) (4B) (4B) (4B) (4B) (4B) (4B) (4B) (4B) (4B) (4B) (4B) (4B) (4B) (4B) (4B) (4B) (4B) (4B) (4B) (4B) (4B) (4B) (4B) (4B) (4B) (4B) (4B) (4B) (4B) (4B) (4B) (4B) (4B) (4B) (4B) (4B) (4B) (4B) (4B) (4B)