Patent ID: 9571392
Date: 2017-02-14
CPC Classifications: H04L

Claim:
1. A method for forwarding a packet, comprising: receiving, by a core backbone (CB) device via a second-level stacking port connected with a source port extender (PE) device, a first packet containing a source port number and a local identifier of a source forwarding chip; determining a global identifier of the source forwarding chip based on the source PE and the local identifier of the source forwarding chip; learning a forwarding table entry based on a source address and the source port number of the first packet and the global identifier of the source forwarding chip; determining a destination port number and a global identifier of a destination forwarding chip based on a forwarding table entry matching a destination address of the first packet; determining a destination PE device and a local identifier of the destination forwarding chip based on the global identifier of the destination forwarding chip; and transmitting the first packet via a second-level stacking port connected with the destination PE device, wherein the first packet contains the local identifier of the destination forwarding chip and the destination port number.