Patent 9525563 was granted and assigned to Hewlett Packard Enterprise on December, 2016 by the United States Patent and Trademark Office.
An edge device searches a MAC table to obtain information of a public network egress interface for a packet which is to be sent from a local site to a remote site to access a service, replaces a VLAN ID in the packet with a VLAN ID used for transmission in a public network, and sends the packet in which the VLAN ID has been replaced to a remote site according to the information of the public network egress interface.