Patent ID: 7660271
Filing Date: 2010-02-09
Classification: H04L

Abstract:
1. A method comprising: in a first network device operably connected via a trunk link to a second and a third network device, wherein the first, second and third network devices are operative to implement a plurality of virtual LANs (VLANs) including a common spanning tree protocol instance and a plurality of per-VLAN spanning tree protocol instances; wherein the common spanning tree protocol instance is implemented across respective native VLANs on the first, second and third network devices, wherein the first network device supports a configurable native VLAN, and wherein the configurable native VLAN is configured to a first native VLAN, wherein the second network device includes a second native VLAN, wherein the third network device includes the second native VLAN, and wherein the second native VLAN is different from the first native VLAN: receiving, at the first network device, a bridge protocol data unit (BPDU) transmitted from the second network device; if the received BPDU is a common spanning tree BPDU: