Generic Framing Procedure（GFP）

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1 TR-G7041 Technical Report on Generic Framing Procedure GFP THE TELECOMMUNICATION TECHNOLOGY COMMITTEE

3 ITU-T G.7041/Y

4 Generic Framing Procedure IP IP SDH GFP GFP G.7041/Y.1303 GFP G.7041/Y.1303 G.7041/Y Editor s Draft ITU-T G.7041/Y.1303 ITU-T G.707 G.709 GFP (PDU) GFP GFP GFP - GFPGFP-F PDU - GFP(GFP-T) 3

5 IP SDH GFP ITU-TG.7041/Y.1303 GFP GFP GFP TTC ITU-T G.7041/Y.1303 GFP ITU-T G.7041/Y.1303 ITU SG15 ITU-T G.7041/Y.1303 GFP GFP SDH TTC JT-G.707 TTC ITU-T 2002 ITU-T G.7041/Y.1303 ANNEX APPENDIX GFP Generic Framing Procedure(GFP) (ITU-T G.7041/Y.1303) ITU-T 4

6 ITU-T G.7041/Y.1303 ITU- G.7041/Y.1303 (GFP) ITU-T G.707 G.709 GFP (PDU) GFP GFP PDU IP/PPP MAC ESCON/SBCON GFP GFP GFP GFP GFP GFPGFP-F PDU GFP(GFP-T) GFP 5

7 Ethernet IP/PPP Other Client Signals GFP Client Specific Aspects (Payload Dependent) GFP Common Aspects (Payload Independent) SDH VC-n Path Other octetsynchronous paths OTN ODUk Path 2 GFP /GFP PDU PDU IP 2 C/C' TNE 2 A/A' PDU /GFP PDU 2 B/B' A A'B B'C C'A C C A' A A' B B' GFP I 6

8 Bridge or Switch or Router function in TNE Data Layer Network C C' Bridge or Switch or Router function in TNE PHY-T PHY-X GFP-T GFP-F GFP-F GFP-F GFP-F GFP-T PHY-X PHY-T A 10BASE 100BASE 1000BASE 10GBASE B ESCON FICON Fibre Channel 1000BASE Transport Layer Network B' A' ESCON 10BASE FICON 100BASE Fibre Channel 1000BASE 1000BASE 10GBASE 7

9 ITU-T G.7041/Y.1303 ITU-T G.707 G.709 SDH OTN GFP GFP (PDU) GFP GFP GFP GFP GFP - ITU-T G Network Node Interface for the Synchronous Digital Hierarchy. ITU-T G Network Node Interface for the Optical Transport Network (OTN) ITU-T I.432 B-ISDN user-network interface Physical layer specification: General characteristics ITU-T G783 Characteristics of Synchronous Digital Hierarchy (SDH)_ equipment functional blocks ITU-T G798 Characteristics of Optical Transport Networks (OTN) equipment functional blocks ISO/IEC 3309:1993, Information Technology Telecommunications and Information Exchange Between Systems High-level Data Link Control (HDLC) Procedures Frame Structure IEEE , Part 3: Carrier Sense Multiple Access with Collision Detection (CSMA/CD) Access Method and Physical Layer Specifications,. ANSI X , Fibre Channel Physical and Signaling Interface (FC-PH) ANSI X , Information Technology--Single-Byte Command Code Sets Connection (SBCON) Architecture IETF RFC 1661, The Point to Point Protocol (PPP), July 1994 IETF RFC 1662, PPP in HDLC-like Framing, July 1994 ETSI (CENELEC): EN : Cable distribution systems for television, sound signals and interactive multimedia signals; Part 9: Interfaces for CATV/SMATV Headends and Similar Professional Equipment for DVB/MPEG-2 transport streams (DVB Blue Book A010), Annex B, Asynchronous Serial Interface, GFP 1 GFP 8

10 3.2 IDCID GFP / GFP 3.4 GFP GFP GFP GFP 3.5 GFP GFP 3.6 MTU GFP 3.7 8B/10B 3.8 SP/DP 3.9 CRC-16 64B/65B GFP GFP GFP GFP ANSI ASI ATM chec CID CoS CRC CSF DE DP DVB HEC ID American National Standards Institute Asynchronous Interface for DVB Asynchronous Transfer Mode Core HEC Channel ID Class of Service Cyclic Redundancy Check Client Signal Fail Discard Eligibility Destination Port 9

11 DST Destination DVB ehec EOF ESCON EXI FC FCS FICON GFP GFP-F GFP-T HDLC HEC IEEE IP IFG IPG ISDN ISO ITU-T Digital Video Broadcast HEC Extension HEC End of Frame Enterprise Systems Connection Extension Header Identifier Fibre Channel Frame Check Sequence Fibre Connection Generic Framing Procedure GFP GFP Frame mapped GFP Transparent GFP High-level Data Link Control Header Error Check Institute of Electrical and Electronic Engineers Internet Protocol Inter-Frame Gap Inter-Packet Gap Integrated Services Digital Network International Standards Organization International Telecommunication Union Telecommunication Standardization Sector LCC LSB Last Control Character Least Significant Bit LOL Loss of Light LOS Loss if Signal MAC MAPOS MSB MTU NE OA&M ODU OTN PDU PFI PLI PTI PPP RD SBCON SDH SSF Media Access Control SONET/SDH Multiple Access Protocol Over SONET/SDH FCS Most Significant Bit Maximum Transmission Unit Network Element Operations, Administration & Maintenance Optical Data Unit Optical Transport Network Protocol Data Unit Payload FCS Identifier Payload Length Indicator Payload Type Identifier Point-to-Point Protocol Running Disparity Single-Byte Command Code Sets Connection Synchronous Digital Hierarchy Server Signal Failure 10

12 SOF SONET SP SPE Start of Frame Synchronous Optical Network Source Port Synchronous Payload Envelop SRC Source STS thec TSF TTL UPI HEC Synchronous Transport Signal Type HEC Trail Signal Fail Time-to-Live User Payload Identifier GFP GFP SDH VC-n ITU-T G.707 OTN ODUk ITU-T G.709 GFP ATM ITU-T I HEC GFP 2 GFP GFP GFP GFP GFP

13 6.1GFP GFP 6-1 GFP GFP GFP GFP Octet Transmission Order Core Header Payload Header Payload Area n Octet Bit Bit Transmission Order 12

14 16-bit PAYLOAD LENGTH INDICATOR CORE HEADER chec (CRC-16) PAYLOAD HEADERS (4-64 BYTES) PAYLOAD AREA CLIENT PAYLOAD INFORMATION FIELD OPTIONAL PAYLOAD FCS (CRC-32) 6.1.1GFP GFP 6-2 GFP 4 16 PDU 16 chec PDU GFP Octet Transmission Order PLI <15:08> PLI <07:00> chec <15:08> chec <07:00> Octet Bit Bit Transmission Order 13

15 PDU PLI 2 PLI GFP GFP PLI 4 PLI 0-3 GFP HECcHEC 2 CRC-16 chec HEC HEC G(x)=x16+x12+x5+1 0 x16 MSB x0 LSB chec ITU-T V.41 I 1.GFP 2 15 M(x) 16 2.M(x)x16 G(x) ( 2)15 R(x) 3.R(x) x CRC-16 1 x15 x0 CRC GFP GFP B6AB31E0 2 DC 32 GFP GFP GFP GFP GFP GFP GFP 2 FCSpFCS 14

16 Octet Transmission Order n Payload Header Payload Information Field Payload FCS (Optional) 4 X=4 to 64 0 to X Octet Bit Bit Transmission Order GFP GFP MTU 1600 GFP GFP GFP MTU 15

17 GFP 6-4 thec 2 FCS thec Octet Transmission Order Type thec Extension Header Field ehec to 60 Octet Bit Bit Transmission Order 4 64 GFP GFP GFP 2 GFP ( ) GFP 6-5 (PTI) FCS (PFI) (EXI) (UPI) Bit Octet Transmission Order 5 6 PTI PFI UPI EXI Bit Bit Transmission Order 16

18 PTI UPI (PTI) GFP 3 (PTI = 000) (PTI = 100) 2 PTI /G.7041/Y.1303 GFP Payload Type Identifiers Type Bits <15:13> Usage 000 Client Data 100 Client Management Others Reserved FCS (PFI) FCS (PFI = 1) (PFI = 1) (EXI) GFP 4 3 EXI /G.7041/Y.1303 GFP Extension Header Identifiers Type Bits <11:8> Usage 0000 Null Extension Header 0001 Linear Frame 0010 Ring Frame Others Reserved (UPI) GFP 8 UPI PTI GFP UPI

19 UPI HEC(tHEC) 2 CRC-16 thec chec( ) -thec a) M(x) thec GFP thec GFP GFP GFP GFP 0 60 EXI ( ) Octet Transmission Order Type <15:08> Type <07:00> thec <15:08> thec <07:00> Octet Bit Bit Transmission Order ( )

20 Octet Transmission Order Type <15:08> Type <07:00> thec <15:08> thec <07:00> CID <07:00> Spare <07:00> ehec <15:08> Octet 12 Bit ehec <07:00> Bit Transmission Order ID(CID) CID 8 GFP HEC(eHEC) HEC(eHEC) 2 ( ) CRC-16 ehec chec( ) -ehec a) M(x) ehec GFP thec GFP GFP GFP 19

21 GFP PDU GFP 0 65,535-X X FCS PDU/ GFP (pfcs) GFP FCS GFP CRC-32 FCS PFI 1 FCS Octet Transmission Order pfcs <31:24> pfcs <23:16> pfcs <15:08> Octet Bit pfcs <07:00> Bit Transmission Order FCS FCS CRC-32 (ISO 3309) G(x) = x 32 + x 26 + x 26 + x 23 + x 22 + x 16 + x 12 + x 11 + x 10 + x 8 + x 7 + x 5 + x 4 + x 2 + x x 32 MSB x 0 LSB FCS FCS GFP N 8N -1 M (x) 8N M (x) x 32 1 U(x) = 1 + x 1 + x x 31 G(x) ( 2)31 R(x) x 8 [1 + x 1 + x x 31 ] R(x) 32 x CRC x 31 x _ _ _

22 GFP SDH RS OTN OPUk ( ) 6-9 x Scrambler x De-scrambler X(t) Y(t - 43) Y(t) Y(t) X(t) Y(t - 43) D 43 D 2 D 1 D 1 D 2 D 43 GFP 1 + x 43 chec GFP GFP GFP GFP 43 chec a)hunt PRESYNC b)sync GFP chec GFP SYNC GFP 6.1.3GFP 2 GFP GFP GFP GFP GFP GFP PTI = 000 PFI = 21

23 EXI = UPI = FCS (PFI) FCS (EXI) GFP FCS UPI /G.7041/Y.1303 GFP PTI = 000 User Payload Identifier (binary) GFP Frame TYPE Bits <7:0> Payload Area Reserved and not available Frame-Mapped Ethernet Frame-Mapped PPP Transparent Fiber Channel Transparent FICON Transparent ESCON Transparent Gb Ethernet Reserved for future Frame-Mapped Multiple Access Protocol over SDH (MAPOS) Transparent DVB ASI through Reserved for future standardization through Reserved for proprietary use GFP GFP GFP 6-10 GFP PTI = 100 PFI = EXI = UPI = 22

24 Octet Transmission Order PTI Length chec PFI UPI thec EXI Core Header Payload Header Extension Header ehec Extension Header (Optional) n Payload Area n +n+1 +n+2 +n+3 4 FCS (Optional +n+4 Octets Bits Bit Transmission Order GFP FCS (PFI) FCS (GFP FCS ) (EXI) (GFP )UPI GFP GFP 23

25 6-4 GFP 6-4/G.7041/Y GFP PTI = 100 UPI value Usage and Reserved Client Signal Fail (Loss of Client Signal) Client Signal Fail (Loss of Character Synchronization) thru Reserved for future use 6.2GFP GFP GFP GFP 6.2.1GFP GFP 4 GFP 0 PLI chec GFP GFP GFP

26 Octet Transmission Order Octet Bit 00 (B6) hex 00 (AB) hex 00 (31) hex 00 (E0) hex Bit Transmission Order PLI = 1, GFP GFP Octet streams from client-specific source adaptation processes Core Header scrambler Payload scrambler Client Management Idle Insert Octet streams to client-specific sink adaptation processes Frame multiplex Payload descrambler Octet streams to/from payload mapping Client Management Idle Termination Core Header check Frame demultiplex 25

27 6.3.1GFP GFP GFP ITU-T I HEC GFP ITU-T I.432 a) GFP GFP PDU b)hec 16 2 HEC GFP GFP 2 2 HEC 1) HUNT GFP 4 HEC PLI HEC GFP PRESYNC 2) PRESYNC GFP GFP HEC GFP PLI GFP DELTA HEC SYNC HEC HUNT HEC HUNT SYNC DELTA 3) SYNC GFP GFP HEC GFP PLI GFP HEC GFP HUNT SSF 4)GFP 26

28 Frame-by-Frame (Error correction disabled) PRESYNC (chec 1D ) Virtual Framers (Up to M) PRESYNC (chec MD ) PRESYNC (chec 11 ) Incorrect chec PRESYNC (chec M1 ) DELTA Consecutive Correct checs Correct chec Correct chec HUNT Incorrect HEC (Multi-bit Errors) SYNC Octet-by-Octet (Error correction disabled) Frame-by-Frame (Error correction enabled) DELTA DELTA= GFP HUNT PRESYNC GFP GFP GFP GFP GFP GFP (CSF) GFP 7 8 GFP (PTI=100) 27

29 GFP 0( FCS) EXI 2 CSF UPI - (UPI= ) - (UPI= ) G.7041/Y.1303 CSF GFP GFP GFP 100msT1000ms CSF GFP CSF GFP GFP 1.N1000ms N CSF 2. GFP CSF GFP 7.3 GFP 8.5 GFP 28

30 6.3.4GFP Ingress Client Process GFP Client-specific Source Adaptation Process GFP Common Process (Client source adaptation) Transport Network Egress Client Process GFP Client-specific Sink Adaptation Process GFP Common Process (Client sink adaptation) Transport Network CSF SSF TSF 6-14 GFP (TSF) G.783 G.798 SDH OTN GFP GFP (6.3.1 ) GFP TSF GFP CSF (CSF ) ( 7 8 TSF GFP GFP GFP SSF GFP CSF CSF GFP ( ) 29

31 GFP GFP 7.1 MAC MAC IEEE PDU GFP PDU GFP PDU PDU Octets Ethernet MAC Frame GFP Frame Octets 2 PLI 2 chec 2 Type 7 Preamble 2 thec 1 Start of Frame Delimiter 0-60 GFP Extension Hdr 6 Destination Address (DA) 6 Source Address (SA) 2 Length/Type GFP MAC client data Payload Pad 4 Frame Check Sequence (FCS) Bits MAC GFP MAC MAC GFP IEEE GFP IPG GFP IPG 1.IPG GFP MAC GFP GFP 2.IPG MAC ( ) MAC GFP GFP 3.IPG GFP GFP MAC ( ) MAC IPG IFG MAC 30

32 00hex IFG IEEE IP/PPP IP/PPP HDLC PPP IETF RFC HDLC IETF RFC RFC 1662 PPP/HDLC PDU GFP PDU GFP PDU PPP/HDLC PDU PPP/HDLC GFP 7-2 MAPOS PPP Octets PPP/HDLC Frame GFP Frame Octets 2 PLI 2 chec 2 Type 2 thec Flag 0-60 GFP Extension Hdr Address Control PPP Type GFP PPP Information Payload (Pad) Frame Check Sequence (FCS) Bits PPP PPP PPP/HDLC GFP 7.2.2GFP/HDLC GFP GFP/HDLC HDLC 1. PPP/HDLC RFC PPP/HDLC GFP GFP 2.GFP GFP PPP /HDLC PPP/HDLC 31

33 IETF RFC x7e 16 0x7d 7.2.3PPP PPP /HDLC IETF RFC LCP 7-3 ACFC GFP GFP Octets PPP/HDLC-like Frame PPP Protocol PPP Information PPP Padding (Optional) PPP/HDLC FCS Octets GFP Frame PLI chec Type thec GFP Extension Hdr GFP Payload Bits GFP PDU PDU 32 FCS GFP PDU 32

34 GFP 8B/10B GFP 8B/10B 8B/10B ESCONFICON GFP GFP 8B/10B GFP GFP GFP FCS GFP bit PAYLOAD LENGTH INDICATOR CORE HEADER PAYLOAD AREA chec (CRC-16) PAYLOAD HEADERS (4-64 BYTES) PAYLOAD INFORMATION FIELD [N x (8 x 65B + 16)] 16-bit PAYLOAD TYPE FIELD thec (CRC-16) OPTIONAL PAYLOAD FCS (CRC-32) 8.164B/65B 8B/10B 2 8B/10B 8B/10B 8B/10B B/10B GFP

35 8-1/G.7041/Y B/10B 64B/65B NAME Octet Value 10B Codeword (RD-) abcdei fghj 10B Codeword (RD+) abcdei fghj 64B/65B 4-bit Mapping /K28.0/ 1C /K28.1/ 3C /K28.2/ 5C /K28.3/ 7C /K28.4/ 9C /K28.5/ BC /K28.6/ DC /K28.7/ FC /K23.7/ F /K27.7/ FB /K29.7/ FD /K30.7/ FE B_ERR N/A Unrecognized RD- Unrecognized RD B_PAD N/A N/A N/A 1101 Spare N/A N/A N/A 1110 Spare N/A N/A N/A B/10B FICON ESCON 64B/65B 8B/10B 4 8B/10B 2-65B 8B/10B 64 /65 (64B/65B) 64B/65B B/65B 8 65 =0 = B/65B 64 64B/65B (LCC=0) (LCC=1) (LCC) 3 8 8B/10B 4 8B/10B 4 4 8B/10B

36 64B/65B 8-2 aaa-hhh Input Client Characters Flag Bit 64-Bit (8-Octet) Field All data 0 D1 D2 D3 D4 D5 D6 D7 D8 7 data, 1 control 6 data, 2 control 5 data, 3 control 4 data, 4 control 3 data, 5 control 2 data, 6 control 1 data, 7 control 1 0 aaa C1 D1 D2 D3 D4 D5 D6 D7 1 1 aaa C1 0 bbb C2 D1 D2 D3 D4 D5 D6 1 1 aaa C1 1 bbb C2 0 ccc C3 D1 D2 D3 D4 D5 1 1 aaa C1 1 bbb C2 1 ccc C3 0 ddd C4 D1 D2 D3 D4 1 1 aaa C1 1 bbb C2 1 ccc C3 1 ddd C4 0 eee C5 D1 D2 D3 1 1 aaa C1 1 bbb C2 1 ccc C3 1 ddd C4 1 eee C5 0 fff C6 D1 D2 1 1 aaa C1 1 bbb C2 1 ccc C3 1 ddd C4 1 eee C5 1 fff C6 0 ggg C7 D1 8 control 1 1 aaa C1 1 bbb C2 1 ccc C3 1 ddd C4 1 eee C5 1 fff C6 1 ggg C7 0 hhh C8 : - (LCC)=1 =0 -aaa=1 (1 )3 -bbb=2 (2 )=3 -hhh=8 (8 )=3 -Ci=i ( )4 -Di= i 8 64B/65B 8B/10B D2 D3 64B/65B C1 LCC 0 64B/65B aaa=010 C1 D2 D3 64B/65B 8 8B/10B 64B/65B 3 4 8B/10B 35

37 B_ERR 64B/65B ( 8/10B 8.3 ) GFP 8B/10B 64B/65B 10B_ERR 8B/10B 10B_ERR ( 8.3 ) (RD-) (RD+)( 8B/10B ) 8B/10B B_PAD GFP ( ) ( ) GFP ( ) GFP GFP 65B_PAD GFP GFP 65B_PAD 8.4 GFP ( 65B_PAD ) 8 GFP 36

38 8.2GFP 64B/65B SDH/ODUk GFP B/65B 8 64B/65B 2 16 CRC-16 Octet 1, 1 Octet 1, 2 Octet 1, 3... Octet 8, 7 Octet 8, 8 L1 L2 L3 L4 L5 L6 L7 L8 CRC1 CRC2 CRC3 CRC4 CRC5 CRC6 CRC7 CRC8 CRC9 CRC10 CRC11 CRC12 CRC13 CRC14 CRC15 CRC16 Octet j,k j 64B/65B k Lj j 64B/65B CRCi i CRC1 CRC MSB 8-3/G.7041/Y.1303 GFP 64B/65B G.7041/Y.1303 GFP 64B/65B FCS GFP [(N (65 8)+16)+(88)] N GFP N SDH N IV IV N GFP ( FCS 8) N SDH/OTN N 8 8 GFP GFP N

39 N IV GFP (8-3 ) CRC-16 10B 10B 10B (8.4 ) CRC-16 G(x)=x 16 +x 15 +x 12 +x 10 +x 4 +x 3 +x 2 +x+1 0 x 16 MSB x 0 LSB CRC M(x) 520 M(x)x 16 G(x) 2 15 R(x) R(x) x CRC-16 CRC-16 CRC B/65B 8B/10B DC 1 0 DC (0 1 ) (1 0 ) 8B/10B DC B/10B B/10B 38

40 8B/10B B 8B/10B RD+ RD- 8B/10B 64B/65B 10B_ERR B_ERR B/10B ANSI X Fibre Channel Physical and Signaling Interface (FC-PH)Rev EOF 2 EOF SOF EOF K28.5 EOF 39

41 RD-K B_ERR 10B (RD-) (RD+) ESCON ESCON ANSI X Information Technology--Single-Byte Command Code Sets Connection (SBCON) Architecture6.2.2 ESCON 10B_ERR 10B (RD-) (RD+) FICON GFP FICON ANSI X ,rev IEEE /I1//I2/ 2 /I/ /I/ /I2/ /I2/ /I2/ SOF SOF RD-K28.5 /I2/ IEEE B/65B 10B_ERR /V/ (K30.7) 10B_ERR 10B (RD-) (RD+) DVB ASI GFP DVB ASI ANSI X Fibre Channel Physical and Signaling InterfaceFC-PHRev B_ERR 10B (RD-) (RD+) 8.464B/65B 64B/65B 40

42 64B/65B 8B/10B B_PAD 65B_PAD 64B/65B GFP 65B_PAD GFP

44 ESCON FICON

45 DVB ASI

46 (LOL) B/10B ESCON ESCON (LOS) 45

47 ESCON 8B/10B ESCON 46

48 8.5.3FICON B/10B SF 8.5.5DVB ASI DVB ASI Loss of Light (LOL) DVB ASI 8B/10B SF DVB ASI 47

49 ( ) GFP (IP, Ethernet ) GFP (SDH ) (IP, Ethernet ) (Ethernet ) 8B/10B GFP-T ( I-1) PDUs GFP-F VC-m-Xv, VC-n, VC-n-Xc, or VC-n-Xv (I-2) GFP IP (Ethernet ) STM-N (I-3,I-4) - 8B/10B (de)coding - Clock/Data Recovery PHY-t/CBR-t Sn-X/CBR-t (GFP-T) - PHY layer CHARACTERS (data, control) encapsulated in fixed length GFP Frames - GFP stream mapped into VC-n-Xv payload t = FC (Fibre Channel) ES (ESCON) FI (FICON) GE (1000BASE) PHY-t Sn-Xv Physical signal X VC-n signals 48

50 Ethernet MAC Frames Ethernet MAC Frame extraction EthS/EthP Ethernet Path Bridge or Switch function Ethernet control character termination EthS Sn[-X]/EthP (GFP-F) - Ethernet MAC Frames encapsulated in GFP Frames - GFP stream mapped into STS-n-Xv payload - Ethernet-PHY line (de)coding - Clock/Data Recovery PHY-t/EthS Sn[-Xv] VC-n path termination or VC-n-Xv path termination t = Ethernet (10BASE) Fast Ethernet (100BASE) GigEthernet (1000BASE) 10GigEthernet (10GBASE) PHY-t VC-n signal or X VC-n signals Physical signal IP IP Router fabric VC-n[-Xv/Xc]/IP (GFP-F) - IP Frame encapsulated in PPP Frame - PPP Frame encapsulated in HDLC Frame - PPP/HDLC Frame encapsulated in GFP Frame - GFP stream mapped into VC-n[-Xv/Xc] payload IP Router Fabric VC-n[-Xv/Xc] VC-n[-Xv/Xc] path termination Interface Port VC-n[-Xc] signal or X VC-n signals 49

51 Ethernet Path Switch function Sn[-X]/EthP (GFP-F) - Ethernet MAC Frame encapsulated in GFP Frame - GFP stream mapped into VC-n[-Xv] payload Ethernet Switch Fabric Sn[-Xv] VC-n path termination or VC-n-Xv path termination Interface Port VC-n signal or X VC-n signals 50

52 ( ) Table II.1 GFP Payload Type Identifier (BIN) TYPE Bits <15:13> Payload FCS Identifier (BIN) TYPE Bit <12> Extension Header Identifier (BIN) TYPE Bits <11:8> User Payload Identifier (BIN) TYPE Bits <7:0> TYPE (HEX) GFP Frame Payload Area xxxx x00 Reserved xxxx x00 Reserved Ethernet with Null Extension Header & no Payload FCS PPP with Null Extension Header & no Payload FCS Ethernet with Linear Extension Header & no Payload FCS PPP with Linear Extension Header & no Payload FCS Ethernet with Ring Extension Header & no Payload FCS PPP with Ring Extension Header & no Payload FCS Transparent Fiber Channel with Null Extension Header & no Payload FCS Transparent FICON with Null Extension Header & no Payload FCS Transparent ESCON with Null Extension Header & no Payload FCS Length of Extension Headers (# Octets)

53 Table II.1 concluded Transparent Gb Ethernet with Null Extension Header & no Payload FCS 0 1xx x xxxx xxxx xxxx - Reserved - x1x x xxxx xxxx xxxx - Reserved - xx1 x xxxx xxxx xxxx - Reserved - 52

54 ( ) : GFP_ DC SDH : SDH DC GFP_ DC FCS 64 Ethernet Ethernet GFP ( IEEE bit 0 GFP bit 8 IEEE bit 7 GFP bit 1 ) Byte Field Value(hex) Comment 1 PLI[15:8]00 ; PLI = Length { Payload Header + Payload Information Field + Payload FCS } ; = = 76 bytes 2 PLI[7:0] 4C 3 chec[15:8] 89 ; 4 chec[7:0] 48 ; 5 TYPE[15:8] 11 ; [15:13]= 000 (client data) 6 TYPE[7:0] 01 ;[12] = 1 (payload FCS enabled) 7 thec[15:8] 20 ; [11:8] = 0001 (linear header) 8 thec[7:0] 63 ; [7:0] = (Ethernet) 9 EHDR[15:8] 80 ; CID[07:00]=0x8000 the value is just an example 10 EHDR[7:0] 00 ; SPARE[7:0] 11 ehec[15:8] 1B ; ehec calculated over CID,SPARE 12 ehec[7:0] 98 ; End extension header 13 DATA FF; 1d Ethernet DA=0xFFFFFFFFFFFF 14 DATA FF; 2d 15 DATA FF; 3d 16 DATA FF; 4d 17 DATA FF; 5d 18 DATA FF; 6d 19 DATA 06 ; 7d Ethernet SA=0x DATA 05 ; 8d 21 DATA 04 ; 9d 22 DATA 03 ; 10d 23 DATA 02 ; 11d 24 DATA 01 ; 12d 53

55 25 DATA 00 ; 13d Ethernet TYPE/LENGTH 26 DATA 2E; 14d 27 DATA 00 ; 15d Ethernet payload 28 DATA 01 ; 16d 29 DATA 02 ; 17d 30 DATA 03 ; 18d 31 DATA 04 ; 19d 32 DATA 05 ; 20d 33 DATA 06 ; 21d 34 DATA 07 ; 22d 35 DATA 08 ; 23d 36 DATA 09 ; 24d 37 DATA 0A; 25d 38 DATA 0B; 26d 39 DATA 0C; 27d 40 DATA 0D; 28d 41 DATA 0E; 29d 42 DATA 0F; 30d 43 DATA 10 ; 31d 44 DATA 11 ; 32d 45 DATA 12 ; 33d 46 DATA 13 ; 34d 47 DATA 14 ; 35d 48 DATA 15 ; 36d 49 DATA 16 ; 37d 50 DATA 17 ; 38d 51 DATA 18 ; 39d 52 DATA 19 ; 40d 53 DATA 1A; 41d 54 DATA 1B; 42d 55 DATA 1C; 43d 56 DATA 1D; 44d 57 DATA 1E; 45d 58 DATA 1F; 46d 59 DATA 20 ; 47d 60 DATA 21 ; 48d 61 DATA 22 ; 49d 62 DATA 23 ; 50d 63 DATA 24 ; 51d 64 DATA 25 ; 52d 65 DATA 26 ; 53d 66 DATA 27 ; 54d 67 DATA 28 ; 55d 54

56 68 DATA 29 ; 56d 69 DATA 2A; 57d 70 DATA 2B; 58d 71 DATA 2C; 59d 72 DATA 2D; 60d 73 DATA DE; 61d Ethernet FCS computed over 60 bytes. 74 DATA E1; 62d 75 DATA 90 ; 63d 76 DATA D0; 64d 77 FCS[31:24] 56 ; First byte of optional GFP payload FCS. 78 FCS[23:16] CF; Covers only payload information field, excludes 79 FCS[15:8] 2B; the extension header (i.e. 64 bytes) 80 FCS[7:0] B0; Last byte of optional GFP FCS. DC Baker XOR GFP Byte Field Value(hex) Comment 1 PLI[15:8] B6 ; 00 xor B6 2 PLI[7:0] E7 ; 4C xor AB 3 chec[15:8]b8 ; 89 xor 31 4 chec[7:0] A8 ; 48 xor E PLI[15:0]=0x004C chec G(x)=x 16 +x 12 +x 5 +1PLI PLI[15:8] CRC-16 PLI[7:0] MSB (MSB ) x 15 x <- CRC-16 initial state Input bit <- CRC-16 after input bit Bit #1 TYPE[15] Bit #2 TYPE[14] 55

57 Bit #3 TYPE[13]... 56

58 ( ) A. GFP-T 536 (N) GFP N (CMF) N N GFP-T (CMF) B. GFP-T SBW( )( )( )( ) ( ) : ( 8B/10B) GFP-T N SBW client data bits / GFP T frame SBW ( N) = rate total bits / GFP T frame ( Min. Chan. rate) ( Max. client data ) SBW N (512)( N)( ChBW ) = GFPOH + (536)( N) min ( ) CSBWmax ChBW min = CSBW max = GFPOH=GFP N SBW(0)>0 N 57

59 N min = ( CSBWmax )( GFPOH ) ( )( ) ( )( ) 512 ChBWmiin 536 CSBWmax [x] x Nmin VC IV-1 C. CMF CMF 2 CMF CMF N CMF Nmax = (65536-GFPOH)/67 = FCS 978 = ( ) FCS 977 GFP-T 1 CMF CMF( CMF ) N CMF CMF N 1 CMF N CMF N 1 CMF m CMF CMF : CMFBW(N,m) = (CMF/second)(bits/CMF) CMFBW ( N, m) = ( ChBWmin )( CMFL)( m) ( m)( CMFL) + GFPOH + ( 536)( N ) CMFL CMF m CMF m 58

60 GFPOH ( 512)( N )( ChBWmin ) CSBWmqx + ( 536)( N ) + ( m)( CMFL) CMF CMF CMFPAL CMFL ( CMFBW ( N m) ) CMPLBW =, CMPLBW=CMF CMFPAL=CMF CMF ( pfcs ) m CMF N : N opt = ( CSBWmax )[ GFPOH + ( m)( CMFL) ] ( 512)( ChBWmin ) ( 536)( CSBWmax ) GFP (Nmin) SDH N IV-1 Nmin : CSBWmax= ( ) GFPOH=GFP CMFBW ChRmin ( ) =(GFP )+(N)(536 ) 59

61 Table IV-1/G.7041/Y SDH GFP Client un-encoded data rate Example client signal VC Path Size Min. number of 65B blocks/gfp frame 160 Mbit/s ESCON VC-3-4v Mbit/s DVB ASI VC-4-2V Mbit/s Fibre Channel VC-4-3v Mbit/s Fibre Channel / FICON VC-4-6v Mbit/s Gbit Ethernet VC-4-7v Mbit/s Fibre Channel VC-4-12v 13 NOTE The minimum number of superblocks shown here assumes a Null Extension Header and no optional payload FCS. FCS 60

ppt

ppt / 5 1 (error control) (flow control) / 5 2 Layer 1 gateway: repeater ( ) Layer 2 gateway: bridge ( ) Layer 3 gateway: router (datalink frame) / 5 3 Data link control (error detection / correction) (flow