CA2329481A1 - Composite trunking - Google Patents

Composite trunking Download PDF

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Publication number
CA2329481A1
CA2329481A1 CA002329481A CA2329481A CA2329481A1 CA 2329481 A1 CA2329481 A1 CA 2329481A1 CA 002329481 A CA002329481 A CA 002329481A CA 2329481 A CA2329481 A CA 2329481A CA 2329481 A1 CA2329481 A1 CA 2329481A1
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Canada
Prior art keywords
trunk
routing
composite
router
packets
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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.)
Granted
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CA002329481A
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French (fr)
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CA2329481C (en
Inventor
Philip P. Carvey
William J. Dally
Larry R. Dennison
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FutureWei Technologies Inc
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Individual
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Publication of CA2329481A1 publication Critical patent/CA2329481A1/en
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Publication of CA2329481C publication Critical patent/CA2329481C/en
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Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area 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
    • H04L45/02—Topology update or discovery
    • H04L45/04—Interdomain routing, e.g. hierarchical routing
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S370/00—Multiplex communications
    • Y10S370/901—Wide area network
    • Y10S370/902—Packet switching

Abstract

An Internet router treats plural output ports with a common destination as a composite port. A routing table uses the IP address to determine a composite trunk to which the packet is to be forwarded. A forwarding table identifies a route along a routing fabric within the router to a specific output port of the composite port. Output ports and fabric routes are selected to maintain order within a flow by routing the flow along a single fabric route to a single output trunk. The forwarding table may favor output ports which are nearest to a packet input port, and the forwarding table may be modified to dynamically balance load across the trunks of a composite trunk.

Claims (36)

1. A network router comprising:
a plurality of trunk ports, including a composite port of plural ports to plural trunks which serve as a composite trunk to a common destination;
a routing fabric of plural nodes for transfer of data packets between trunk ports at respective nodes, paths between ports including multiple hops through nodes of the fabric, a composite port including ports froth plural nodes; and an output port selector at each input node which selects an output port for a packet from a composite port.
2. The router as claimed in Claim 1 wherein the output port selector maintains ordering of packets within a flow by routing the packets of the flow on a single trunk of a composite trunk.
3. The router as claimed in Claim 2 wherein the output port selector further maintains ordering of packets within the flow by routing the packets of the flow along a single route through the router fabric.
4. The router as claimed in Claim 1 wherein the output port selector balances load across the trunks of a composite trunk.
5. The router as claimed in Claim 1 wherein the output port selector dynamically balances load across the trunks of a composite trunk.
6. The router as claimed in Claim 1 wherein the output port selector favors output ports having lessor distances to be traversed on the muting fabric from an input port.
7. The router as claimed in Claim 1 wherein the output port selector determines the output port within the composite port by table lookup.
8. The router as claimed in Claim 1 wherein the output port selector comprises a routing table which maps destination addresses to composite trunks.
9. The router as claimed in Claim 8 wherein the output part selector further comprises a forwarding table which maps composite trunks to sets of routes within the routing fabric.
10. The router as claimed in Claim 9 wherein the output port selector maintains ordering of packets within a flow by routing the packets of the flow on a single trunk of a composite trunk.
11. The router as claimed in Claim 10 wherein the output pore selector further maintains ordering of packets within a flow by routing the packets of the flow along a single route through the router fabric.
12. The router as claimed in Claim 10 wherein the network is the Internet and the destination addresses are Internet protocol addresses.
13. The router as claimed in Claim 12 wherein the routing fabric is a three-dimensional torus.
14. The router as claimed in Claim 9 wherein the output port selector balances load across the trunks of a composite trunk.
15. The router as claimed in Claim 9 wherein the output part selector dynamically balances load across the in trunks of 9 composite truck.
16. The router as claimed in Claim 9 wherein the output port selector favor output ports having lesser distances to be traversed on the routing fabric from an input port.
17. The router as claimed in Claim 8 wherein the output port selector further comprises a forwarding table which maps composite trunks to sets of output ports,
18. The router as claimed in Claim 17 wherein the output port selector further comprises a forwarding table which maps output ports to sets of routes within the routing fabric.
19. The router as claimed in Claim 17 wherein the output port selector maintains ordering of packets within a flow by routing packets of the flow on a single truck of a composite trunk.
20. A method of routing a packet in a network comprising:
at an input to a routing fabric, identifying a destination of the packet;
selecting one of plural trunks, from plural nodes of the routing fabric, forming a composite trunk to the destination; and forwarding the jacket through the routing fabric and toward the destination on the selected trunk.
21. The method as claimed in Claim 20 wherein the trunk is selected to maintain ordering of packets within a flow by routing the packets of the flow on a single trunk of the composite trunk.
22. The method as claimed in Claim 21 wherein routing within the routing fabric is selected to maintain order of packets within the flow by routing the packets of the flow along a single route.
23. The method as claimed in Claim 20 wherein the trunk is selected to balance load across the trunks of the composite trunk.
24. The method as claimed in Claim 20 wherein the trunk is selected to dynamically balance load across the trunks of tho composite trunk.
25. The method as claimed in Claim 20 wherein the trunk is selected to favor a lesser distance between input and output ports on the roofing fabric.
26. The method as claimed in Claim 20 wherein the trunk is selected by table lookup.
27. The method as claimed in Claim 20 wherein the step of selecting one of plural trunks includes the step of determining the composite trunk front a destination address through routing table lookup.
28. The method as claimed in Claim 27 wherein the step of selecting one of plural trunks further comprises selecting a route within the routing fabric through a forwarding table lookup.
29. The method as claimed in Claim 28 wherein the route within the fabric is selected to preserve the order of packets within a flow.
30. The method as claimed in Claim 29 wherein the route within the routing fabric is selected to maintain order of packets within a flow by routing the packets of the flow along a single route.
31. The method as claimed in Claim 28 wherein the trunk is selected to balance load across the trunks of the composite trunk.
32. The method as claimed in Claim 28 wherein the trunk is selected to dynamically balance load across the trunks of the composite trunk,
33. The method and claimed in Claim 28 wherein the trunk is selected to favor a lesser distance between input and output ports on the routing fabric.
34, The method as claimed in Claim 20 wherein the destination is identified from a final destination identifier included in the packet.
35. The method as claimed in Claim 34 wherein the network is the internet and the packets are routed order an Internet protocol.
36. The method as claimed in Claim 35 wherein the packet is routed within the routing fabric on a three-dimensional torus fabric from an input port to an output port.
CA2329481A 1998-04-24 1999-04-15 Composite trunking Expired - Lifetime CA2329481C (en)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
US8292398P 1998-04-24 1998-04-24
US60/082,923 1998-04-24
US09/073,842 1998-05-06
US09/073,842 US6359879B1 (en) 1998-04-24 1998-05-06 Composite trunking
PCT/US1999/008334 WO1999056432A2 (en) 1998-04-24 1999-04-15 Composite trunking in a router

Publications (2)

Publication Number Publication Date
CA2329481A1 true CA2329481A1 (en) 1999-11-04
CA2329481C CA2329481C (en) 2011-03-29

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Family Applications (1)

Application Number Title Priority Date Filing Date
CA2329481A Expired - Lifetime CA2329481C (en) 1998-04-24 1999-04-15 Composite trunking

Country Status (9)

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US (2) US6359879B1 (en)
EP (1) EP1070413B1 (en)
JP (1) JP2002513244A (en)
KR (1) KR100655012B1 (en)
AT (1) ATE387789T1 (en)
AU (1) AU3564999A (en)
CA (1) CA2329481C (en)
DE (1) DE69938239T2 (en)
WO (1) WO1999056432A2 (en)

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US7920555B2 (en) 2011-04-05
ATE387789T1 (en) 2008-03-15
US6359879B1 (en) 2002-03-19
DE69938239D1 (en) 2008-04-10
EP1070413A2 (en) 2001-01-24
WO1999056432A3 (en) 2000-01-27
DE69938239T2 (en) 2009-03-26
CA2329481C (en) 2011-03-29
KR100655012B1 (en) 2006-12-07
US20020051458A1 (en) 2002-05-02
AU3564999A (en) 1999-11-16

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