Method, system, router and apparatus for implementing switching between layer-2 multicast route tracing and layer-3 multicast route tracing
US8442047B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jul 7, 2010 |
| Grant date | May 14, 2013 |
| Priority date | — |
| Expiry date | May 18, 2031 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L49/201
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
Disclosed herein are a method for implementing switching between layer-2 multicast route tracing and layer-3 multicast route tracing, and a method, a system, a router and an apparatus for differentiating between a layer-2 property and a layer-3 property. One of the methods includes: The query apparatus judges whether to perform layer-2 multicast route tracing, and adds an IP option of layer-2 multicast route tracing into the IGMP Tracert Query packet if layer-2 multicast route tracing needs to be performed. The last-hop router receives the IGMP Tracert Query packet, judges whether the packet carries the IP option of layer-2 multicast route tracing, and transmits the IGMP Tracert Query packet to a downstream layer-2 node transparently if the packet carries the IP option, or initiates layer-3 multicast route tracing if the packet carries no such IP option. The method, system, and router disclosed herein can implement switching between layer-2 multicast route tracing and layer-3 multicast route tracing, and enable the query apparatus to identify the layer property of each IGMP Tracert Response data block.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.