Patent ID: 10868698

Abstract:
A method and system are devised of moving at a NAS (1) a client (12, 13) with a MAC address, from a first VLAN to a second VLAN. A leaf is comprised of at least one intermediate L2 bridge/switch (5, 9) being connected to the NAS (1). The client (12, 13) is being connected to one (9) of the at least one intermediate L2 bridge/switches (5, 9) in the leaf. The method and system involve sending at the NAS (1) a first message downlink (31, 36) to intermediate L2 bridge/switches (5) in the leaf directly connected to the NAS. They further involve at each intermediate L2 bridge/switch (5, 9) in the leaf: upon receiving the first message from uplink from the NAS (1) or an intermediate L2 bridge/switch (5, 9) in the leaf, determining whether the client (12, 13) is directly or indirectly connected to one of its ports; and if it is directly connected, bouncing the port to which the client (12, 13) is connected, and sending a second message uplink to the NAS (1) or an intermediate L2 bridge/switch (5, 9) in the leaf; if it is indirectly connected, sending the first message downlink on the port to which the client (12, 13) is indirectly connected to an intermediate L2 bridge/switches (5, 9) in the leaf; and if it is not connected, sending a third message uplink to the NAS (1) or an intermediate L2 bridge/switch (5, 9) in the leaf. They further involve at each intermediate L2 bridge/switch (5, 9) in the leaf: upon receiving the second or third message from downlink from an intermediate L2 bridge/switch (5, 9) in the leaf, forwarding it uplink to the NAS (1) or an intermediate L2 bridge/switch (5, 9) in the leaf. Finally the client (12, 13) may initiate a DHCP request in the second VLAN.