A method of synchronizing a Media Access Control, MAC, address, wherein the method comprises: notifying (S201), by a first Virtual Extensible Local Area Network, VXLAN, Tunnel End Point, VTEP, a first mapping relationship configured on a first aggregation port and a first Internet Printing Protocol, IPP, port of the first VTEP to a second VTEP, so that the second VTEP configures the first mapping relationship on a second aggregation port and a second IPP port of the second VTEP, wherein: the first VTEP and the second VTEP belong to the same multi-chassis link aggregation system; the first mapping relationship represents a mapping relationship of a first tag Identifier, ID, of a first port of the first VTEP to a first Virtual Extensible Local Area Network, VXLAN, ID; and a second tag ID of a second port of the second VTEP is different from the first tag ID; receiving (S202), by the first VTEP, a successful configuration message returned by the second VTEP after the second VTEP successfully configures the first mapping relationship on the second aggregation port and the second IPP port of the second VTEP; and sending (S203), by the first VTEP, a first MAC address to the second IPP port via the first IPP port, wherein the first MAC address is the MAC address of a device accessing the first VTEP via the first port. notifying (S201), by a first Virtual Extensible Local Area Network, VXLAN, Tunnel End Point, VTEP, a first mapping relationship configured on a first aggregation port and a first Internet Printing Protocol, IPP, port of the first VTEP to a second VTEP, so that the second VTEP configures the first mapping relationship on a second aggregation port and a second IPP port of the second VTEP, wherein: the first VTEP and the second VTEP belong to the same multi-chassis link aggregation system; the first mapping relationship represents a mapping relationship of a first tag Identifier, ID, of a first port of the first VTEP to a first Virtual Extensible Local Area Network, VXLAN, ID; and a second tag ID of a second port of the second VTEP is different from the first tag ID; receiving (S202), by the first VTEP, a successful configuration message returned by the second VTEP after the second VTEP successfully configures the first mapping relationship on the second aggregation port and the second IPP port of the second VTEP; and the first VTEP and the second VTEP belong to the same multi-chassis link aggregation system; the first mapping relationship represents a mapping relationship of a first tag Identifier, ID, of a first port of the first VTEP to a first Virtual Extensible Local Area Network, VXLAN, ID; and a second tag ID of a second port of the second VTEP is different from the first tag ID; receiving (S202), by the first VTEP, a successful configuration message returned by the second VTEP after the second VTEP successfully configures the first mapping relationship on the second aggregation port and the second IPP port of the second VTEP; and sending (S203), by the first VTEP, a first MAC address to the second IPP port via the first IPP port, wherein the first MAC address is the MAC address of a device accessing the first VTEP via the first port. <EOS>