| US 7,602,705 B1 | ||
| Dual-homing layer 2 switch | ||
| Dileep Sivasankaran, Fremont, Calif. (US); and Frank S. Madren, Los Gatos, Calif. (US) | ||
| Assigned to Garrettcom, Inc., Fremont, Calif. (US) | ||
| Filed on Feb. 17, 2006, as Appl. No. 11/356,902. | ||
| Claims priority of provisional application 60/726331, filed on Oct. 12, 2005. | ||
| This patent is subject to a terminal disclaimer. | ||
| Int. Cl. G01R 31/08 (2006.01) | ||
| U.S. Cl. 370—218 [370/225] | 22 Claims |
| 1. A method of providing dual-homing in a layer 2 switch, the method comprising:
determining whether a link is available to an upstream network on a currently active port; and
if the link is unavailable, then a) performing a switchover such that the currently active port becomes a newly passive port,
and a currently passive port becomes a newly active port, b) clearing entries in an address table of the layer 2 switch, and
c) spoofing MAC addresses out of the newly active port.
|