Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

IP multicasting precision port repeat method in three layer exchanging

An IP multicast and three-layer switching technology, which is applied in store-and-forward switching systems, data exchange through path configuration, electrical components, etc., can solve problems such as inability to solve the problem of precise port forwarding in a VLAN, and achieve improved efficiency and obvious effects Effect

Inactive Publication Date: 2004-12-15
BEIJING HUAWEI DIGITAL TECH
View PDF0 Cites 28 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this solution can only solve the problem of precise port forwarding in the VLAN of leaf nodes, and cannot solve the problem of precise port forwarding in VLANs of non-leaf nodes.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • IP multicasting precision port repeat method in three layer exchanging

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0014] Since the forwarding chip only mechanically forwards the data message according to the multicast forwarding item, the accurate forwarding of the multicast data message at the VLAN port depends on the multicast forwarding item in the forwarding chip which can be accurate to the VLAN specific port. The key to generating such multicast forwarding items lies in the maintenance of the multicast routing port mapping table.

[0015] The maintenance of the multicast routing port mapping table first needs to receive the VLAN ID of the multicast protocol message and data message and the specific physical port number under the VLAN. The Layer 3 switch saves its Layer 3 and Layer 2 interface indexes for the received message, and can obtain the corresponding VLAN ID and physical port number according to the Layer 3 interface indexes and the Layer 2 interface indexes.

[0016] Multicast routing port mapping entries are generated in the following situations:

[0017] 1. When the IGMP...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

This invention provides a method for accurately forwarding IP multicast port in three layers of exchange including: 1 keeping related VLAN ID for received messages and concrete physical numbers of VLAN, 2 generating and maintaining a multicast rout port image list which stores the multicast rout source address, the target multicast address, input interface VLAN ID and the physical port number and the output interface VLAN ID and physical port number listing 3 sending the multicast route items of quad mode to a forward chip according to the corresponding multicast route port image list items, the chip generates input and output interfaces as the multicast forward item of the concrete physical port under VLAN 4 The forward chip forwards the data message according to the multicast forward items.

Description

Technical field: [0001] The invention belongs to the field of computer network communication, and in particular relates to a method for IP (Internet Protocol) multicast precise port forwarding in three-layer exchange. Background technique: [0002] Existing IP multicast routing protocols, such as PIM-SM (sparse mode of protocol-independent multicast routing protocol) and PIM-DM (dense mode of protocol-independent multicast routing protocol), etc. (this article only uses PIM-SM as an example), Its routing item is a quadruple in the form of (source, group, iifoif). Where source is the IP address of the multicast data source, group is the destination multicast address, iif is the incoming interface, and oif is the outgoing interface list. The multicast protocol sends the routing item to the forwarding chip, so the corresponding forwarding item in the form of a quadruple is maintained in the forwarding chip. When receiving a multicast information message, the forwarding chip s...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): H04L12/46H04L45/74
Inventor 任治国
Owner BEIJING HUAWEI DIGITAL TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com