Network control software notification and invalidation of static entries
US10838942B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 11, 2014 |
| Grant date | Nov 17, 2020 |
| Priority date | — |
| Expiry date | Oct 10, 2036 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04W40/242
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
Techniques are disclosed for notifying network control software of new and moved source MAC addresses. In one embodiment, a switch may redirect a packet sent by a new or migrated virtual machine to the network control software as a notification. The switch does not forward the packet, thereby protecting against denial of service attacks. The switch further adds to a forwarding database a temporary entry which includes a “No_Redirect” flag for a new source MAC address, or updates an existing entry for a source MAC address that hits in the forwarding database by setting the “No_Redirect” flag. The “No_Redirect” flag indicates whether a notification has already been sent to the network control software for this source MAC address. The switch may periodically retry the notification to the network control software, until the network control software validates the source MAC address, depending on whether the “No_Redirect” is set.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.