Signaling aliasing capability in data centers
US9590902B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 30, 2014 |
| Grant date | Mar 7, 2017 |
| Priority date | — |
| Expiry date | Jul 19, 2035 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L45/74
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
Techniques are described for signaling aliasing capability between routers in a multi-tenant data center that uses VPNs, such as Ethernet VPNs. In the multi-tenant data center, two or more PE routers may be connected to a CE router by a multi-homed L2 segment in an all-active mode. Aliasing refers to the ability of a PE router to signal that it can reach a given multi-homed L2 segment even when the PE router has learned no MAC addresses over that multi-homed L2 segment. The PE routers on the multi-homed L2 segment advertise aliasing capability using a route advertisement on a per-L2 segment basis. When the multi-tenant data center uses global VPN identifiers, no additional information is needed by a remote PE to build an ECMP next hop to the PE routers that support aliasing, and transmission of a route advertisement on a per-VPN basis may be suppressed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.