JS010257802B2 d2 United States Patent ao)Patent No.:US 10,257,802 B2 Xue et al. (45)Date of Patent: Apr.9,2019 (54)BINDING REGISTRATION METHOD,DATA (58)Field of Classification Search FORWARDING METHOD,RELATED CPC…H04W60/04:H04W8/06;H04W8/082 DEVICE.AND NETWORK SYSTEM H04W8/10:H04W40/00:H04L 12/4633:H04L61/2038:H04L61/305 (71)Applicants:Huawei Technologies Co.,Ltd., See application file for complete search history. Shenzhen (CN):University of Science (56 References Cited and Technology of China,Hefei (CN) U.S.PATENT DOCUMENTS (72)Inventors:Kaiping Xue,Hefei (CN);Yizhen Wu. Hefei (CN):Dan Ni.Hefei (CN):Fang 8.681.739B1*3/2014Zha0, H04W76/15 370/331 Yu,Beijing (CN) 2010/0035578A1*2/2010 Ahmed..H04W12/06 455/411 (73)Assignees:Huawei Technologies Co.,Ltd., (Continued) Shenzhen (CN):University of Science and Technology of China,Hefei (CN) FOREIGN PATENT DOCUMENTS (*Notice: Subject to any disclaimer,the term of this CN 101848454A 9/2010 patent is extended or adjusted under 35 CN 101902792A 12/2010 U.S.C.154(b)by 159 days. OTHER PUBLICATIONS (21)Appl.No:15/360,831 Liu et al.,"Mobility Support in Software Defined Networking (22)Filed: Now.23,2016 draft-liu-sdn-mobility-00,"Informational,Internet-Draft,Network Working Group (Jul.8,2013). (65) Prior Publication Data (Continued) US2017/0079000A1Mar.16.2017 Primary Examiner-Kevin D Mew (74)Attorney,Agent,or Firm-Leydig,Voit Mayer, Ltd. Related U.S.Application Data (57) ABSTRACT (63)Continuation of application No A binding registration method includes:an SDN controller PCT/CN2014/078310.filed on May23.2014. receiving a first bearer message that is forwarded by a first MAG in multiple MAGs and that carries a first L2 attach (51)Int.Cl. request message;sending,to each of the first MAG and an H04W8/06 (2009.01) LMA,a message for establishing a tunnel between the first H04W60/04 (2009.01) MAG and the LMA:sending,to each of the first MAG and (Continued) the LMA,a message for adjusting a flow entry of an MN; (52)U.S.C1. configuring an HNP(s)for the MN,and encapsulating the CPC… H04Ψ60/04(2013.01)：H04L12/4633 HNP(s)into an RA message;and sending the RA message (2013.01):104L612038(2013.01): to the first MAG. (Continued) 20 Claims,10 Drawing Sheets 10 一130 130 N RA
US010257802B2 ( 12 ) United States Patent Xue et al . ( 10 ) Patent No . : US 10 , 257 , 802 B2 ( 45 ) Date of Patent : Apr . 9 , 2019 ( 54 ) BINDING REGISTRATION METHOD , DATA FORWARDING METHOD , RELATED DEVICE , AND NETWORK SYSTEM ( 58 ) Field of Classification Search CPC . . . . . . . H04W 60 / 04 ; HO4W 8 / 06 ; H04W 8 / 082 ; HOW 8 / 10 ; H04W 40 / 00 ; HOLL 12 / 4633 ; H04L 61 / 2038 ; H04L 61 / 305 See application file for complete search history . ( 56 ) References Cited U . S . PATENT DOCUMENTS ( 71 ) Applicants : Huawei Technologies Co . , Ltd . , Shenzhen ( CN ) ; University of Science and Technology of China , Hefei ( CN ) ( 72 ) Inventors : Kaiping Xue , Hefei ( CN ) ; Yizhen Wu , Hefei ( CN ) ; Dan Ni , Hefei ( CN ) ; Fang Yu , Beijing ( CN ) 8 , 681 , 739 B1 * 2010 / 0035578 A1 * 3 / 2014 Zhao . . . . . . . . . . . . . . . . . . H04W 76 / 15 370 / 331 2 / 2010 Ahmed . . . . . . . . . . . . . . . . . H04W 12 / 06 455 / 411 ( Continued ) ( 73 ) Assignees : Huawei Technologies Co . , Ltd . , Shenzhen ( CN ) ; University of Science and Technology of China , Hefei ( CN ) FOREIGN PATENT DOCUMENTS ( * ) Notice : Subject to any disclaimer , the term of this CN CN 101848454 A 101902792 A 9 / 2010 12 / 2010 U . S . C . 154 ( b ) by 159 days . OTHER PUBLICATIONS ( 21 ) Appl . No . : 15 / 360 , 831 ( 22 ) Filed : Nov . 23 , 2016 ( 65 ) Prior Publication Data US 2017 / 0079000 A1 Mar . 16 , 2017 Related U . S . Application Data ( 63 ) Continuation of application PCT / CN2014 / 078310 , filed on May 23 , 2014 . No . Liu et al . , “ Mobility Support in Software Defined Networking draft - liu - sdn - mobility - 00 , ” Informational , Internet - Draft , Network Working Group ( Jul . 8 , 2013 ) . ( Continued ) Primary Examiner - Kevin D Mew ( 74 ) Attorney , Agent , or Firm — Leydig , Voit & Mayer , Ltd . ( 57 ) ABSTRACT A binding registration method includes : an SDN controller receiving a first bearer message that is forwarded by a first MAG in multiple MAGs and that carries a first L2 attach request message ; sending , to each of the first MAG and an LMA , a message for establishing a tunnel between the first MAG and the LMA , sending , to each of the first MAG and the LMA , a message for adjusting a flow entry of an MN ; configuring an HNP ( s ) for the MN , and encapsulating the HNP ( s ) into an RA message ; and sending the RA message to the first MAG . 20 Claims , 10 Drawing Sheets ( 51 ) Int . Ci . H04W 8 / 06 ( 2009 . 01 ) H04W 60 / 04 ( 2009 . 01 ) ( Continued ) ( 52 ) U . S . CI . CPC . . . . . . . . . H04W 60 / 04 ( 2013 . 01 ) ; H04L 12 / 4633 ( 2013 . 01 ) ; H04L 61 / 2038 ( 2013 . 01 ) ; ( Continued ) 1301 An SDN controller receives a first bcarcr message that is forwarded by a first MAG in multiple MAGs and V that carries a first 12 allach request message , so that an MN requests to register with a network 1302 1303 The SDN controller sends a first establishment message to the first MAG The SDN controller sends a second establishmetit message to an LMA 1304 1305 The SDN controller sends a ( irst adjustment message to the first MAG The SDN controller sends a sccond adjustinent message to the LMA The SDN controller configures an HNP ( s ) for the MN , encapsulates the 1 1306 IINP ( s ) into an RA message , and sends thc RA message to the first MAG - 1307 When the MN needs to be switched from the first MAG lo a second MAG in the multiplc MAGs , the SDN controller receives a second bearer message that is forwarded by the second MAG and that carries a second L2 attach request message , to request the MN to register with the network The SDN controller sends , to each of the socond MAG and the LMA , a - 1308 message for establishing a lunnel between the second MAG and the LMA , to establish the tunnel between the second MAG and thc LMA The SDN Controller sends , to each of the second MAG and the LMA , a 1 - 1309 message for adjusting allow entry of the MN 1310 HNP ( S ) into the RA message , and sends the RA message to the second MAG , so that the MN is registered with the network when the MN receives the RA message from the second MAG
US10,257,802B2 Page 2 (51)Int.C. 2012/0044949A1*2/2012 Velev.… H04W8082 H04L12/46 (2006.01) 370/401 H04L29/12 (2006.01) 2012.0113937A1*5/2012 Aramote0 H04W8082 (2009.01) 370/329 H04W8/10 H04W8/06 H04W8/08 2012/0252481A1*10/2012 Anpat (2009.01) 455/456.1 H04P40/00 2009.01) 2014/0321328A1*10/2014 Zuniga H04W8/06 (52)U.S.C1. 370)54 CPC… H04W806(2013.01:H04W8082 2015/0085740A1* 3/20l5 Kalapatapu.… H04W88/04 (2013.01:H04W8/10(2013.01:H04W 370/315 2015/0148036A1* 5/2015 Grayson H04W8/06 40/00(2013.01:H04L61/305(2013.01) 455/435.1 2016/0014686A1*1/2016Cho H04W48/18 (56) References Cited 370328 2016/0183156A1* 6/2016Chin H04W36,0022 370/331 U.S.PATENT DOCUMENTS 2016/0374050A1* 12/2016 Prasad H04W4/06 20100215019A18/2010 Velev H04W8/06 2017/0214452A1* 7/2017Fang .H04B7/15507 370/331 20100250753A1®9/2010Song… H04W360011 OTHER PUBLICATIONS 709227 2010/0323700A1◆12/2010 Bachmann ...H04W360066 Gudavelli et al.,"Proxy Mobile IPv6,"Request for Comments: 455/436 5213,Standards Track,Network Working Group (Aug.2008). 2011/0026453A102/2011Yan. H04W8082 Raza et al."Leveraging PMIPv6 with SDN,"ICUIMC14 Proceed- 370/328 ings of the 8"International Conference on Ubiquitous Information 2011/0103260A1◆5/2011 Jeyatharan.H04W6000 Management,ACM,New York.New York (Jan.9-11,2014). 370/254 Gundavelli et al.,"Proxy Mobile IPv6,"Request for Comments: 2011/0261787A1*10/2011 Bachmann..H04L63/029 5213,Standards Track,Network Working Group (Aug.2008). 370331 2011/0292879A112/2011Wang cited by examiner
US 10 , 257 , 802 B2 Page 2 ( 51 ) Int . CI . H04L 12 / 46 ( 2006 . 01 ) H04L 29 / 12 ( 2006 . 01 ) H046 8 / 10 ( 2009 . 01 ) H04W 8 / 08 ( 2009 . 01 ) H04W 40 / 00 ( 2009 . 01 ) U . S . CI . CPC . . . . . . . . . . . . . H04W 8 / 06 ( 2013 . 01 ) ; H0W 8 / 082 ( 2013 . 01 ) ; H046 8 / 10 ( 2013 . 01 ) ; H04W 40 / 00 ( 2013 . 01 ) ; H04L 61 / 305 ( 2013 . 01 ) ( 52 ) 2012 / 0044949 A1 * 2 / 2012 Velev . . . . . . . . . . . . . . . . . . . . HOW 8 / 082 370 / 401 2012 / 0113937 A1 * 5 / 2012 Aramoto . . . . . . . . . . . . . . . H04W 8 / 082 370 / 329 2012 / 0252481 Al * 10 / 2012 Anpat H04W 8 / 06 455 / 456 . 1 2014 / 0321328 Al * 10 / 2014 Zuniga . . . . . . . . . . . . . . . . . . . . H04W 8 / 06 370 / 254 2015 / 0085740 A1 * 3 / 2015 Kalapatapu . . . . . . . . . . . H04W 88 / 04 370 / 315 2015 / 0148036 A1 * 5 / 2015 Grayson . . . . . . . . . . . . . . . . . H04W 8 / 06 455 / 435 . 1 2016 / 0014686 Al * 1 / 2016 Cho . . . . . . . . . . . . . . . . . . . H04W 48 / 18 370 / 328 2016 / 0183156 Al * 6 / 2016 Chin . . . . . . . . . . . . . . . . H04W 36 / 0022 370 / 331 2016 / 0374050 A1 * 12 / 2016 Prasad . . . . . . . . . . . . . . . . . . . . H04W 4 / 06 2017 / 0214452 A1 * 7 / 2017 Fang . . . . . . . . . . . . . . . . . . H04B 7 / 15507 ( 56 ) References Cited U . S . PATENT DOCUMENTS 2010 / 0215019 A1 * 8 / 2010 Velev . . . . . . . . . . . . . . . . . . . H04W 8 / 06 370 / 331 2010 / 0250753 Al * 9 / 2010 Song . . . . . . . . . . . . . . . . . H04W 36 / 0011 709 / 227 2010 / 0323700 Al * 12 / 2010 Bachmann . . . . . . . HO4W 36 / 0066 455 / 436 2011 / 0026453 A1 * 2 / 2011 Yan . . . . . . . . . . . . . . . . . . . . . . . H04W 8 / 082 370 / 328 2011 / 0103260 A1 * 5 / 2011 Jeyatharan . . . . . . . . . . H04W 60 / 005 370 / 254 2011 / 0261787 A1 * 10 / 2011 Bachmann . . . . . . . H04L 63 / 029 370 / 331 2011 / 0292879 Al 12 / 2011 Wang Gudavelli et al . , “ Proxy Mobile IPv6 , " Request for Comments : 5213 , Standards Track , Network Working Group ( Aug . 2008 ) . Raza et al . , “ Leveraging PMIPv6 with SDN , ” ICUIMC ' 14 Proceed ings of the 8th International Conference on Ubiquitous Information Management , ACM , New York , New York ( Jan . 9 - 11 , 2014 ) . Gundavelli et al . , “ Proxy Mobile IPv6 , " Request for Comments : 5213 , Standards Track , Network Working Group ( Aug . 2008 ) . * cited by examiner
U.S.Patent Apr.9,2019 Sheet 1 of 10 US10,257,802B2 101 102 103 First receiving unit First sending unit Second sending unit 105 104 Third sending unit Configuration and encapsulation unit FIG.1 201 202 203 First receiving unit First sending unit Second sending unit 206 205 204 Second receiving unit Third sending unit Configuration and encapsulation unit FIG.2
U . S . Patent Apr . 9 , 2019 Sheet 1 of 10 US 10 , 257 , 802 B2 - 101 102 103 First receiving unit First sending unit Second sending unit 105 104 Third sending unit Configuration and encapsulation unit FIG . 1 201 202 203 First receiving unit First sending unit Second sending unit 206 - 205 204 Second receiving unit Third sending unit Configuration and encapsulation unit FIG . 2
U.S.Patent Apr.9,2019 Sheet 2 of 10 US10,257,802B2 301 302 303 304 First receiving First Second Establishment unit forwarding unit receiving unit unit 306 305 Second Adjustment forwarding unit unit FIG.3 401 402 403 404 First receiving First forwarding Second Establishment unit unit receiving unit unit 407 406 405 Third receiving Second unit forwarding unit Adjustment unit 408 409 Matching unit Third forwarding unit FIG.4
atent Apr . 9 , 2019 Sheet 2 of 10 US 10 , 257 , 802 B2 301 302 303 304 First receiving First Second receiving unit Establishment unit forwarding unit unit 306 305 Second Adjustment unit FIG . 3 401 402 403 404 First receiving unit First forwarding unit Second receiving unit Establishment unit 407 406 405 Third receiving unit Second forwarding unit Adjustment unit 409 Matching unit Third forwarding unit FIG . 4
U.S.Patent Apr.9,2019 Sheet 3 of 10 US10,257,802B2 501 502 503 First receiving unit Establishment uni Adjustment unit FIG.5 601 602 603 First receiving Establishment Adjustment unit unit unit 606 605 604 Forwarding unit Matching unit Second receiving unit FIG.6 11 Mobile node 3 10 13 Mobile access Software defined Local mobility gateway networking controller anchor FIG.7
U . S . Patent Apr . 9 , 2019 Sheet 3 of 10 US 10 , 257 , 802 B2 501 - 502 503 First receiving unit Establishment unit Adjustment 5 unit 25 FIG . 5 601 602 603 First receiving unit Establishment unit Adjustment unit 606 605 - 604 Forwarding unit Matching unit Second receiving unit FIG . 6 - 11 Mobile node - 10 Mobile access gateway Software defined networking controller Local mobility anchor
U.S.Patent Apr.9,2019 Sheet 4 of 10 US10,257,802B2 12 10 13 MN MAG SDN LMA Network controller 801.L2 attach request message -802.Bearer message 803.First establishment message and first 803.Second adjustment message establishment message and second adjustment message 804.Establish a tunnel 805.Establish a tunnel on the MAG side on the LMA side Establishment of the tunnel succeeds 807.RA ←806.RA messago- message 808.Packet 809.Packet data- 810.Packet data data 812.Packet 811.Packet data 811.Packet data data FIG.8 903 901 902 Transmitter Processor Receiver FIG.9
U . S . Patent Apr . 9 , 2019 Sheet 4 of 10 US 10 , 257 , 802 B2 11 13 MN MAG SDN controller LMA Network 801 . L2 attach request message - 802 . Bearer message 803 . First establishment message and first adjustment message 803 . Second establishment message and second adjustment message 804 . Establish a tunnel on the MAG side 805 . Establish a tunnel on the LMA side Establishment of the tunnel succeeds 807 . RA R - 806 . RA message message 808 . Packet data - 809 . Packet data 810 . Packet data _ _ 812 . Packet data - 811 . Packet data 811 . Packet data FIG . 8 903 - 901 902 655 Transmitter Processor Receiver FIG . 9
U.S.Patent Apr.9,2019 Sheet 5 of 10 US10,257,802B2 1002 1001 1003 Transmitter Processor Receiver FIG.10 1101 -1102 Processor Receiver FIG.11 1201 An SDN controller receives a first bearer message that is forwarded by a first MAG in multiple MAGs and that carries a first L2 attach request message,so that an MN requests to register with a network 1202 The SDN controller sends,to each of the first MAG and an LMA,a message for establishing a tunnel between the first MAG and the LMA. to establish the tunnel between the first MAG and the LMA 1203 The SDN controller sends,to each of the first MAG and the LMA,a message for adjusting a flow entry of the MN 1204 The SDN controller configures an HNP(s)for the MN,encapsulates the HNP(s)into an RA message,and sends the RA message to the first MAG FIG.12
U . S . Patent Apr . 9 , 2019 Sheet 5 of 10 US 10 , 257 , 802 B2 1002 1001 1003 Transmitter Processor Receiver FIG . 10 1101 1102 Processor Receiver FIG . 11 1201 An SDN controller receives a first bearer message that is forwarded by a first MAG in multiple MAGs and that carries a first L2 attach request message , so that an MN requests to register with a network 1202 The SDN controller sends , to each of the first MAG and an LMA , a message for establishing a tunnel between the first MAG and the LMA , to establish the tunnel between the first MAG and the LMA 1203 The SDN controller sends , to each of the first MAG and the LMA , a message for adjusting a flow entry of the MN 1204 The SDN controller configures an HNP ( s ) for the MN , encapsulates the HNP ( s ) into an RA message , and sends the RA message to the first MAG FIG . 12
U.S.Patent Apr.9,2019 Sheet 6 of 10 US10,257,802B2 An SDN controller receives a first bearer message that -1301 is forwarded by a first MAG in multiple MAGs and that carries a first L2 attach request message,so that an MN requests to register with a network 1302 1303 The SDN controller sends a first The SDN controller sends a second establishment message to the first MAG establishment message to an LMA 1304 1305 The SDN controller sends a first The SDN controller sends a sccond adjustment message to the first MAG adjustment message to the LMA The SDN controller configures an HNP(s)for the MN,encapsulates the 1306 HNP(s)into an RA message,and sends the RA message to the first MAG When the MN needs to be switched from the first MAG to a second MAG in the multiple MAGs,the SDN controller receives a second bearer 1307 message that is forwarded by the second MAG and that carries a second L2 attach request message,to request the MN to register with the network The SDN controller sends,to each of the second MAG and the LMA.a 1308 message for establishing a tunnel between the second MAG and the LMA to establish the tunnel between the second MAG and the LMA The SDN controller sends,to each of the second MAG and the LMA,a 1309 message for adjusting a flow entry of the MN The SDN controller configures the HNP(s)for the MN,encapsulates the HNP(s)into the RA message,and sends the RA message to the second -1310 MAG,so that the MN is registered with the network when the MN receives the RA message from the second MAG FIG.13
U . S . Patent Apr . 9 , 2019 Sheet 6 of 10 US 10 , 257 , 802 B2 1301 An SDN controller receives a first bearer message that is forwarded by a first MAG in multiple MAGs and that carries a first L2 attach request message , so that an MN requests to register with a network 1302 1303 The SDN controller sends a first establishment message to the first MAG The SDN controller sends a second establishment message to an LMA 1304 - 1305 The SDN controller sends a first adjustment message to the first MAG The SDN controller sends a second adjustment message to the LMA 1306 The SDN controller configures an HNP ( s ) for the MN , encapsulates the HNP ( s ) into an RA message , and sends the RA message to the first MAG - 1307 When the MN needs to be switched from the first MAG to a second MAG in the multiple MAGs , the SDN controller receives a second bearer message that is forwarded by the second MAG and that carries a second L2 attach request message , to request the MN to register with the network The SDN controller sends , to each of the second MAG and the LMA , a 1308 message for establishing a tunnel between the second MAG and the LMA , to establish the tunnel between the second MAG and the LMA 1309 The SDN controller sends , to each of the second MAG and the LMA , a message for adjusting a flow entry of the MN 1310 The SDN controller configures the HNP ( s ) for the MN , encapsulates the HNP ( s ) into the RA message , and sends the RA message to the second MAG , so that the MN is registered with the network when the MN receives the RA message from the second MAG FIG . 13
U.S.Patent Apr.9,2019 Sheet 7 of 10 US10,257,802B2 1401 A MAG receives an L2 attach request message sent by an MN 1402 The MAG adds the L2 attach request message to a bearer message,and forwards the bearer message to an SDN controller 1403 The MAG receives a message that is sent by the SDN controller and for establishing a tunnel between the MAG and an LMA,and completes establishment of the tunnel on the MAG side according to the message for establishing a tunnel between the MAG and the LMA 1404 The MAG receives a message that is sent by the SDN controller and for adjusting a flow entry of the MN,and adjusts,according to the message for adjusting a flow entry of the MN,a flow entry that is of the MN and stored in the MAG 1405 If establishment of the tunnel between the MAG and the LMA succeeds, the MAG forwards an RA message received from the SDN controller to the MN,so that the MN is registered with a network FIG.14
Apr . 9 , 2019 Sheet 7 of 10 US 10 , 257 , 802 B2 1401 A MAG receives an L2 attach request message sent by an MN 1402 The MAG adds the L2 attach request message to a bearer message , and forwards the bearer message to an SDN controller 1403 The MAG receives a message that is sent by the SDN controller and for establishing a tunnel between the MAG and an LMA , and completes establishment of the tunnel on the MAG side according to the message for establishing a tunnel between the MAG and the LMA 1404 The MAG receives a message that is sent by the SDN controller and for adjusting a flow entry of the MN , and adjusts , according to the message for adjusting a flow entry of the MN , a flow entry that is of the MN and stored in the MAG 1405 If establishment of the tunnel between the MAG and the LMA succeeds , the MAG forwards an RA message received from the SDN controller to the MN , so that the MN is registered with a network FIG . 14
U.S.Patent Apr.9,2019 Sheet 8 of 10 US10,257,802B2 1501 A MAG receives an L2 attach request message sent by an MN 1502 The MAG adds the L2 attach request message to a bearer message and forwards the bearer message to an SDN controller The MAG receives a message that is sent by the SDN controller and 1503 for establishing a tunnel between the MAG and an LMA,and establishes a tunnel interface on the MAG side according to the message for establishing a tunnel between the MAG and the LMA The MAG receives a message that is sent by the SDN controller and 1504 for adjusting a flow entry of the MN,and adds a first flow entry of th MN according to the message for adjusting a flow entry of the MN If establishment of the tunnel between the MAG and the LMA 1505 succceds,the MAG forwards an RA message received from the SDN controller to the MN,so that the MN is registered with a network 1506 The MAG receives Matching packet data sent by the MN,and fails matches a source address prefix included in the packet data with a first matching entry in the first flow entry in the MAG Matching succeeds The MAG forwards the packet data to the LMA through the tunnel 1507 between the MAG and the LMA according to the first flow entry,so that the LMA forwards the packet data to the network Forwarding fails FIG.15
U . S . Patent Apr . 9 , 2019 Sheet 8 of 10 US 10 , 257 , 802 B2 A MAG receives an L2 attach request message sent by an MN The MAG adds the L2 attach request message to a bearer message , and forwards the bearer message to an SDN controller The MAG receives a message that is sent by the SDN controller and 1503 for establishing a tunnel between the MAG and an LMA , and establishes a tunnel interface on the MAG side according to the message for establishing a tunnel between the MAG and the LMA The MAG receives a message that is sent by the SDN controller and 1 1504 for adjusting a flow entry of the MN , and adds a first flow entry of the MN according to the message for adjusting a flow entry of the MN 1505 If establishment of the tunnel between the MAG and the LMA succeeds , the MAG forwards an RA message received from the SDN controller to the MN , so that the MN is registered with a network 1506 Matching fails - The MAG receives packet data sent by the MN , and matches a source address prefix included in the packet data with a first matching entry in the first flow entry in the MAG Matching succeeds 1507 The MAG forwards the packet data to the LMA through the tunnel between the MAG and the LMA according to the first flow entry , so that the LMA forwards the packet data to the network Forwarding fails FIG . 15