Dual-homed external network access in a distributed internet protocol (IP) router
US9565277B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jun 24, 2015 |
| Grant date | Feb 7, 2017 |
| Priority date | — |
| Expiry date | Jun 24, 2035 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L69/22
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
Dual-homed forwarding techniques ensure that packets destined for a private network location are forwarded directly to the private network. Host devices adapted for dual-homed forwarding techniques may first search a forwarding table to identify an outgoing interface associated with a packet's destination address, and then search an egress table to identify an entry associated with the outgoing interface. The identified entry in the egress table indicates whether the outgoing interface is a remote interface, and if so, a dual-homing identifier associated with the outgoing interface. If so, the host device searches the forwarding table a second time to determine whether any local interfaces are associated with the dual-homing identifier. The packet is then forwarded either over the local outgoing interface associated with the dual-homing identifier or the originally identified outgoing interface.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.