Methods and routers for connectivity setup between provider edge routers
US9621378B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 27, 2012 |
| Grant date | Apr 11, 2017 |
| Priority date | — |
| Expiry date | Mar 27, 2033 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L45/66
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A router receives, from a BGP peer, a BGP update message including NLRI (VPN-NLRI) specific to a virtual private network, as well as path information including an address of a next hop for the VPN-NLRI. The router determines that there is no route to the next hop, modifies the filtering information to permit propagation of NLRI including the address of the next hop, and sends the modified filtering information to BGP neighbors. Alternatively, a router determines that such a BGP update message is due to be sent to a BGP peer. The router determines that the filtering information does not allow propagation, to the peer, of NLRI including the address of the next-hop, modifies the filtering information so as to permit propagation, to the BGP peer, of NLRI including the address of the next hop, and sends the BGP update message to the peer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.