CA2480462A1 - Label switching in fibre channel networks - Google Patents

Label switching in fibre channel networks Download PDF

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Publication number
CA2480462A1
CA2480462A1 CA002480462A CA2480462A CA2480462A1 CA 2480462 A1 CA2480462 A1 CA 2480462A1 CA 002480462 A CA002480462 A CA 002480462A CA 2480462 A CA2480462 A CA 2480462A CA 2480462 A1 CA2480462 A1 CA 2480462A1
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CA
Canada
Prior art keywords
fibre channel
label
labels
frame
channel frame
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.)
Granted
Application number
CA002480462A
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French (fr)
Other versions
CA2480462C (en
Inventor
Scott S. Lee
Dinesh G. Dutt
Thomas J. Edsall
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Cisco Technology Inc
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Individual
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Publication of CA2480462A1 publication Critical patent/CA2480462A1/en
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Publication of CA2480462C publication Critical patent/CA2480462C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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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
    • 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
    • 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
    • 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]
    • H04L12/46—Interconnection of networks
    • 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]
    • H04L12/46—Interconnection of networks
    • H04L12/4604—LAN interconnection over a backbone network, e.g. Internet, Frame Relay
    • 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

Abstract

Methods and apparatus are provided for label switched routing in fibre chann el networks. Techniques are provided for implementing label switching based on particular characteristics of fibre channel networks. By using label switching, mechanisms such as traffic engineering, security, and tunneling through networks that do not support fibre channel frames can be implemented .

Claims (22)

1. A method for routing fibre channel frames in a fibre channel fabric, the method comprising:
receiving a fibre channel frame having a first stack of labels at a fibre channel switch;
referencing an entry in a label information base at the fibre channel switch based on the stack of incoming labels;
removing the first stack of labels from the fibre channel frame; and forwarding the fibre channel frame.
2. The method of claim 1, wherein the fibre channel frame is forwarded substantially without any label information.
3. The method of any of claims 1-2, further comprising:
inserting a second set of labels into the fibre channel frame.
4. The method of claim 3, wherein the fibre channel frame is forwarded to a next hop based on the entry in the label information base.
5. The method of claim 3, wherein the fibre channel switch is a core label switching router.
6. The method of any of claims 1-5, wherein the stack of labels comprises of one or more labels.
7. The method of claim 6, wherein the one or more of the labels are associated with one or more virtual storage area networks.
8. The method of any of claims 1-7, wherein the first label stack is included in the EISL header.
9. The method of any of claims 1-7, wherein the first label stack is included in the in the fibre channel frame header.
10. An apparatus for routing fibre channel frames in a fibre channel fabric, the apparatus comprising:
means for receiving a fibre channel frame having a first stack of labels at a fibre channel switch;
means for referencing an entry in a label information base at the fibre channel switch based on the stack of incoming labels;
means for removing the first stack of labels from the fibre channel frame;
and means for forwarding the fibre channel frame.
11. A method for tunneling fibre channel frames, the method comprising:
receiving a fibre channel frame at a gateway between a first network supporting fibre channel and a second network not supporting fibre channel;
identifying an incoming label associated with the fibre channel frame, the incoming label determined using fibre channel routing mechanisms;
swapping the incoming label associated with the fibre channel frame with an outgoing label, the outgoing label determined by referencing an entry in the label information base associated with the gateway;
inserting additional labels to the fibre channel frame, wherein the additional labels are determined using non-fibre channel routing mechanisms, the additional labels used to forward the frame in the second network.
12. The method of claim 11, wherein the second network is a TCP/IP
network supporting label switching.
13. The method of any of claims 11-12, wherein the additional labels correspond to entries in a label information base of a second network.
14. The method of claim 13, further comprising adding a control word to the fibre channel frame.
15. The method of claim 14, wherein the control word is used at the tunnel end gateway to reorder frames received out of sequence.
16. The method of any of claims 11-15, wherein a label indicator is contained in the EISL header.
17. The method of any of claims 11-16, wherein a label indicator is contained in the fibre channel header.
18. A computer readable medium comprising computer code for configuring a fibre channel switch, the computer readable medium comprising:
computer code for receiving a fibre channel frame at a gateway between a first network supporting fibre channel and a second network not supporting fibre channel;
computer code for identifying an incoming label associated with the fibre channel frame, the incoming label determined using fibre channel routing mechanisms;

computer code for swapping the incoming label associated with the fibre channel frame with an outgoing label, the outgoing label determined by referencing an entry in the label information base associated with the gateway;
computer code for inserting additional labels to the fibre channel frame, wherein the additional labels are determined using non-fibre channel routing mechanisms, the additional labels used to forward the frame in the second network.
19. An ingress fibre channel label switching router, the router comprising:
a memory; and a processor operable to receive augmented link state update information, select a route through a plurality of core fibre channel label switching routers to an egress fibre channel label switching router using the augmented link state update information, and generate a tunnel setup message having information identifying the plurality of core fibre channel label switching routers.
20. The router of claim 19, wherein the processor is further operable to forward the tunnel setup message along the selected route.
21. The method of claim 20, wherein the processor is further operable to receive a response corresponding to the tunnel setup message, the response including label information.
22. The method of claim 21, wherein the memory includes a label information base having label information associated with the ingress fibre channel label switching router.
CA2480462A 2002-04-01 2003-03-25 Label switching in fibre channel networks Expired - Fee Related CA2480462C (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US10/114,394 US7616637B1 (en) 2002-04-01 2002-04-01 Label switching in fibre channel networks
US10/114,394 2002-04-01
PCT/US2003/009442 WO2003085900A1 (en) 2002-04-01 2003-03-25 Label switching in fibre channel networks

Publications (2)

Publication Number Publication Date
CA2480462A1 true CA2480462A1 (en) 2003-10-16
CA2480462C CA2480462C (en) 2012-03-20

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Family Applications (1)

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CA2480462A Expired - Fee Related CA2480462C (en) 2002-04-01 2003-03-25 Label switching in fibre channel networks

Country Status (9)

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US (3) US7616637B1 (en)
EP (1) EP1491007B1 (en)
JP (2) JP2005522146A (en)
KR (1) KR100971050B1 (en)
CN (1) CN1647460B (en)
AT (1) ATE557501T1 (en)
AU (1) AU2003226093B2 (en)
CA (1) CA2480462C (en)
WO (1) WO2003085900A1 (en)

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US20100008375A1 (en) 2010-01-14
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US20130343397A1 (en) 2013-12-26

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