Method for optimizing a route cache
US8175098B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 27, 2009 |
| Grant date | May 8, 2012 |
| Priority date | — |
| Expiry date | Jul 22, 2030 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L45/742
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A system and method for managing a route cache to reduce the risk of disruption from denial of service attacks. All traffic arriving on a front interface from local (on-link) nodes (e.g., neighbor nodes) can be treated normally. However, for packets arriving from remote (off-link) sources addressed to a given destination IP address, a single, shared route cache entry can be used. The source-address field in this entry can be zeroed-out since it will not be used for traffic coming from any one source. Similarly, for all packets going to off-link destinations through the front-interface, another single shared route cache entry can be created and used. The destination-address field in this entry can be zeroed out since it will not be used for traffic going to any one destination.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.