SEA failover mechanism with minimized packet losses
US9426022B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 13, 2013 |
| Grant date | Aug 23, 2016 |
| Priority date | — |
| Expiry date | Dec 13, 2033 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L43/10
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
Provided are techniques for active SEA learning about a client LPAR MAC addresses via address resolution protocol (ARP) packets received on a virtual interface (of the active SEA). Any new client MAC addresses learned on the active SEA are sent to the inactive SEA via a control channel. When SEA failover happens, as the previously inactive SEA is about to become active, it will first send out RARP (reverse ARP) packets with the client MAC addresses as the source MAC addresses respectively. This effectively informs the switch connected to the previously inactive SEA that these client MAC addresses are to be routed through this switch port; the client MAC addresses saved on the switch connected to the previously active SEA are cleared as a result.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.