EP1733519A1 - Verfahren zur steuerung des datenverkehrs in eimem paketnetz - Google Patents
Verfahren zur steuerung des datenverkehrs in eimem paketnetzInfo
- Publication number
- EP1733519A1 EP1733519A1 EP05717166A EP05717166A EP1733519A1 EP 1733519 A1 EP1733519 A1 EP 1733519A1 EP 05717166 A EP05717166 A EP 05717166A EP 05717166 A EP05717166 A EP 05717166A EP 1733519 A1 EP1733519 A1 EP 1733519A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- traffic
- packet network
- routes
- node
- lsps
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
- 238000000034 method Methods 0.000 title claims description 11
- 238000004040 coloring Methods 0.000 claims description 2
- 230000005540 biological transmission Effects 0.000 abstract description 2
- 238000013024 troubleshooting Methods 0.000 description 4
- 238000010276 construction Methods 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000012797 qualification Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L45/00—Routing or path finding of packets in data switching networks
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L45/00—Routing or path finding of packets in data switching networks
- H04L45/24—Multipath
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L45/00—Routing or path finding of packets in data switching networks
- H04L45/28—Routing or path finding of packets in data switching networks using route fault recovery
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L45/00—Routing or path finding of packets in data switching networks
- H04L45/50—Routing or path finding of packets in data switching networks using label swapping, e.g. multi-protocol label switch [MPLS]
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L47/00—Traffic control in data switching networks
- H04L47/10—Flow control; Congestion control
- H04L47/12—Avoiding congestion; Recovering from congestion
- H04L47/125—Avoiding congestion; Recovering from congestion by balancing the load, e.g. traffic engineering
Definitions
- Is used in a packet network e.g.
- the IP network uses a special procedure (e.g. multi-protocol label switching, MPLS for short) to transport part or all of the traffic along certain paths (so-called label switched paths, LSP for short) it eg
- MPLS multi-protocol label switching
- LSP label switched paths
- RSVP Exactly one LSP is set up from the ingress router to the egress router using RSVP. After RSVP detects the failure of the LSP, RSVP tries to find an alternative way to the destination. Result: slow troubleshooting
- At least two ⁇ LSPs are set up from the ingress router to the egress router with or without the help of RSVP; one of them is the “Primary LSP", the others are “Secondary LSPs".
- Primary LSP means that only this LSP is used for the data transport as long as the data transport is not disturbed by an error on this LSP. If an error is detected on the primary LSP, the first secondary LSP is used. If this is also not available, the second secondary LSP is used, etc.
- Ingress router and egress router must be the same for all LSPs (primary and secondary). This means that protection against failure of the egress router (s) is not possible.
- MPLS-TE MPLS Traffic Engineering
- auto-bandwidth feature is not available by default for the secondary LSP. This can result in the secondary LSP not being able to provide enough bandwidth after an error, which results in packet loss and thus a loss in quality of the connections concerned.
- Detour LSPs are predefined for an LSP: For each fault that should be taken into account, such a detour LSP is defined: e.g. For each router through which the LSP is running (destination nodes excluded), a detour can be defined that bypasses the next link and the next router and returns to the original LSP as soon as possible. The result: quick troubleshooting, but no protection option for the LSP egress router, time-consuming, no bandwidth guarantee after a failure
- the invention is explained in more detail below, the drawing comprising three figures supporting the explanation.
- the figures represent an exemplary section of a packet network which comprises two subnetworks LAN A and LAN B and intermediate networks which contain the routers Ri to R8.
- the LSPs should be as disjx ⁇ nkt as possible (with the exception of the LSP ingress router) and configured so that the traffic from the router R ⁇ to the LAN B is distributed as evenly as possible between the two LSPs (load balancing) (this load distribution can, for example, result from this can be realized that the N LSPs have the same LSP metric (ie the same evaluation value with regard to the length qualification of the
- LSPs LSPs
- ECMP Equal Cost Multi-Path
- LSPi and LSP 2 should actually be disjoint (except for Ri). This can be achieved, for example, by using RSVP and CSPF (Constraint-Based Shortest Path First) with the help of the "Link Coloring" concept for the construction of the LSPs, which is shown in the example network according to FIGS. 1 to 3 can be done as follows: The links R] .
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Data Exchanges In Wide-Area Networks (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102004016941A DE102004016941A1 (de) | 2004-04-06 | 2004-04-06 | Verfahren zur Steuerung des Datenverkehrs in einem Paketnetz |
| PCT/EP2005/051498 WO2005099186A1 (de) | 2004-04-06 | 2005-04-04 | Verfahren zur steuerung des datenverkehrs in eimem paketnetz |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP1733519A1 true EP1733519A1 (de) | 2006-12-20 |
Family
ID=34964687
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP05717166A Withdrawn EP1733519A1 (de) | 2004-04-06 | 2005-04-04 | Verfahren zur steuerung des datenverkehrs in eimem paketnetz |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP1733519A1 (de) |
| DE (1) | DE102004016941A1 (de) |
| WO (1) | WO2005099186A1 (de) |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6081511A (en) * | 1996-08-14 | 2000-06-27 | Cabletron Systems, Inc. | Load sharing for redundant networks |
| US6112249A (en) * | 1997-05-30 | 2000-08-29 | International Business Machines Corporation | Non-disruptively rerouting network communications from a secondary network path to a primary path |
| JP3695362B2 (ja) * | 2001-07-12 | 2005-09-14 | 日本電気株式会社 | 通信コネクション迂回システム |
| JP4297636B2 (ja) * | 2001-08-21 | 2009-07-15 | 富士通株式会社 | 伝送システム |
-
2004
- 2004-04-06 DE DE102004016941A patent/DE102004016941A1/de not_active Withdrawn
-
2005
- 2005-04-04 WO PCT/EP2005/051498 patent/WO2005099186A1/de not_active Ceased
- 2005-04-04 EP EP05717166A patent/EP1733519A1/de not_active Withdrawn
Non-Patent Citations (2)
| Title |
|---|
| None * |
| See also references of WO2005099186A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2005099186A1 (de) | 2005-10-20 |
| DE102004016941A1 (de) | 2005-10-27 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
| 17P | Request for examination filed |
Effective date: 20060825 |
|
| AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): DE ES FR GB IT |
|
| R17C | First examination report despatched (corrected) |
Effective date: 20070112 |
|
| DAX | Request for extension of the european patent (deleted) | ||
| RBV | Designated contracting states (corrected) |
Designated state(s): DE ES FR GB IT |
|
| RAP1 | Party data changed (applicant data changed or rights of an application transferred) |
Owner name: NOKIA SIEMENS NETWORKS GMBH & CO. KG |
|
| RAP3 | Party data changed (applicant data changed or rights of an application transferred) |
Owner name: NOKIA SIEMENS NETWORKS S.P.A. |
|
| RAP3 | Party data changed (applicant data changed or rights of an application transferred) |
Owner name: NOKIA SIEMENS NETWORKS GMBH & CO. KG |
|
| STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
|
| 18D | Application deemed to be withdrawn |
Effective date: 20070724 |