US 2019/0296924 A1 · FORWARDING MULTICAST DATA PACKET

Abstract

A method, device and system for forwarding a multicast data packet are provided. The system is an extended bridge constructed by a controlling bridge and a port extender. The controlling bridge transmits a multicast data packet with an ETAG having a multicast ECID via a cascade port, and the multicast ECID directs to egress ports in different VLANs of the multicast group on a port extender connected with the cascade port. The port extender receives the packet with the ETAG via an upstream port connected with the controlling bridge, searches for multicast duplication information matching the multicast ECID, duplicates the packet for each egress port based on the multicast duplication information, removes the ETAG of each copy of the packet, adds a port identification and a VLAN identification of each egress port to each copy of the packet, and transmits the packet containing the VLAN identification via each egress port.

Claims14

Dependent claims

A method of forwarding a multicast data packet, comprising:

receiving, by a controlling bridge, a multicast data packet;
determining, by the controlling bridge, a multicast E-Channel Identification (ECID) and a cascade port associated with a multicast group of the multicast data packet, wherein the multicast ECID directs to egress ports in different VLANs of the multicast group on a port extender connected with the cascade port;
adding, by the controlling bridge, an Extension VLAN Tag (ETAG) having the multicast ECID to the multicast data packet;
and
transmitting, by the controlling bridge, the multicast data packet with the ETAG having the multicast ECID via the cascade port.

2 more elements

A device for forwarding a multicast data packet, which is applied to a controlling bridge of an extended bridge, and the device comprising:

a receiving unit configured to receive a multicast data packet;
a searching unit configured to determine a multicast E-Channel Identification (ECID) and a cascade port associated with a multicast group of the multicast data packet, wherein the multicast ECID directs to egress ports in different VLANs of the multicast group on a port extender connected with the cascade port;
and
a transmitting unit configured to add an Extension VLAN Tag (ETAG) having the multicast ECID to the multicast data packet and transmit the multicast data packet with the ETAG having the multicast ECID via the cascade port.

1 more element

A device for forwarding a multicast data packet, which is applied to a port extender of an extended bridge system, and the device comprising:

a receiving unit configured to receive a multicast data packet containing an Extension VLAN Tag (ETAG) having a multicast E-Channel Identification (ECID) via an upstream port;
a searching unit configured to search for multicast duplication information matching the multicast ECID, wherein the multicast duplication information contains a port identification and a VLAN identification of each egress port of a multicast group corresponding to the multicast data packet;
and
a transmitting unit configured to duplicate the multicast data packet for each egress port based on the multicast duplication information, remove the ETAG of each copy of the multicast data packet, add the VLAN identification of each egress port to each copy of the multicast data packet, and transmit the multicast data packet containing the VLAN identification via each egress port.

1 more element

Dependencies are inferred from the claim text.

Forwarding multicast data packet

Life of this patent

Forwarding multicast data packet

Life of this patent

Abstract

Claims14