Packet processing in a routing instance that is distributed across at least two different routing stacks
US10454823B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 8, 2018 |
| Grant date | Oct 22, 2019 |
| Priority date | — |
| Expiry date | Apr 14, 2038 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L47/17
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
The problem of processing an egress packet by a data forwarding device having (1) a first routing stack associated with a first namespace and a first interface, (2) a second routing stack associated with a second namespace and a second interface, wherein at least some forwarding information included in the second namespace is incompatible with the first routing stack, (3) a virtual routing and forwarding instance (VRF), and (4) a shared session layer socket associated with both the first and second routing stack, and bound to the VRF, where the VRF is associated with the second interface via the second routing stack, is solved by: adding the first interface to the VRF whereby the VRF is associated with both the first and second interfaces; and responsive to the adding of the first interface to the VRF, (1) adding routes from the second namespace to the first namespace such that network address prefixes of the second namespace are associated with a “special” next hop, and (2) flagging the shared session layer socket bound to the VRF. When an egress packet on the flagged shared session layer socket is received, the data forwarding device (1) sends the egress packet to the first routi…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.