Port address translation scalability in stateful network device clustering
US10715486B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 7, 2018 |
| Grant date | Jul 14, 2020 |
| Priority date | — |
| Expiry date | Sep 21, 2038 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L61/2517
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A method is performed by a master network device among network devices of a cluster. The master network device receives cluster configuration information including a set of Internet Protocol (IP) addresses and a pool of port blocks associated with the IP addresses. Each port block includes multiple ports, and the pool of the port blocks is to be shared across and used by the network devices for port address translation on network connections with the network devices. The master network device divides the port blocks in the pool into multiple buckets. The master network device first allocates to each network device in the cluster a corresponding one of the buckets, and reserves each bucket that is not allocated for allocation to a potential new network device. When a new network device joins the cluster, the master network device second allocates to the new network device the port blocks from a corresponding one of the reserved buckets.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.