VLAN stacking for two tiers of business

In the two-tier network, because the VLAN configured between the operator and the user may have been, if the user sends the message to do any processing, then if the user sends the message the VLAN is not within the carrier network's license VLAN range, the user's message will be discarded, causes the packet loss, and the VLAN The emergence of stacking technology is precisely to solve this problem.

VLAN stacking needs to match a specific outer VLAN, specifically what VLAN is specified by the operator, VLAN stacking function is configured on the access device provided by the carrier network and on the receiving device, when the message arrives at the carrier network and matches the specified VLAN, A layer of outer VLAN is used to traverse the carrier network, and when the message arrives at the operator's receiving device, the outer VLAN of the message is stripped off and then sent to the peer device, thus achieving the purpose of traversing the carrier network.

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VLAN stacking for two tiers of business