FC-LS-3 RDP ROUND-UP. Roger Hathorn (IBM) Howard L. Johnson (Brocade) Krishna Babu Puttagunta (HP) T11/15-034v2 T11 FC-LS-3

Transcription

1 FC-LS-3 RDP ROUND-UP Roger Hathorn (IBM) Howard L. Johnson (Brocade) Krishna Babu Puttagunta (HP) T11/15-034v2 T11 FC-LS-3 1

2 Table of Contents Agreements Buffer Credit descriptor FEC Active flag Reply clarifications Contemplations Buffer Credit descriptor Optical Menagerie Ponderings E_Ports 2

3 Agreements Buffer Credit descriptor Description Descriptor tag = h Descriptor length = 4-bytes Values FC_Port buffer-to-buffer credit The advertised buffer-to-buffer credit for the Fx_Port or Nx_Port for which diagnostic parameters are being provided. Attached FC_Port buffer-to-buffer credit The advertised buffer-to-buffer credit received in a from the directly attached Fx_Port or Nx_Port, if any. Bits Word 0 Buffer Credit descriptor tag 1 Buffer Credit descriptor Length (4 bytes) 2 FC_Port buffer-to-buffer credit Attached FC_Port buffer-to-buffer credit Notes See Contemplations 3

4 Agreements FEC Active flag Description Bit-15 Applies to 16G only Values 0b 16G FEC status is inactive or unknown 1b 16G FEC is active Notes Same definition for QSFP Bit Description 15 FEC Active: 0b = 16G FEC status is inactive or unknown 1b = 16G FEC is active 14 8 Reserved 7 6 Connector Type: 00b = unknown 01b = SFP+ 10b - 11b = reserved 5 SFP Diagnostic Parameters not valid: If set to 1, the response does not include valid values for; a) Temperature; b) Vcc; c) Tx Bias; d) Tx Power; and e) Rx Power. 4 Optical Port: If set to 1, the FC_Port is an optical port. 3-0 If set to 0, the FC_Port is not an optical port. Port Tx Type: 0000b = Not optical or other type 0001b = Short Wave Laser 0010b = Long Wave Laser LC 1310nm 0011b = Long Wave Laser LL 1550nm 0100b b = reserved. 4

5 Agreements Reply Clarifications RDP LS_ACC Payload Table description The word count n of the descriptor list length shall not be greater than 511. Optional descriptors The diagnostic parameter descriptors in an RDP LS_ACC may include any of; a) a FEC Status descriptor; and, b) a Buffer Credit descriptor 5

6 Contemplations Buffer Credit descriptor Description Add fields for providing an indication of credit depletion conditions Values Transmit Delay Counter The count of frame cycles, if available, a frame transmission was delayed on the port when no buffer credit was available and a frame was ready to be transmitted. The definition of a frame cycle is specific to the implementation, but should be relative to the transmission time of a frame. Receive Delay Counter The count of frame cycles, if available, the port was unable to receive frames because no buffers were available. The definition of a frame cycle is specific to the implementation, but should be relative to the receive time of a frame. Bits Word 0 Buffer Credit descriptor tag 1 Buffer Credit descriptor Length (12 bytes) 2 FC_Port buffer-to-buffer credit Attached FC_Port buffer-to-buffer credit 3 Transmit Delay Counter 4 Receive Delay Counter 6

7 Contemplations Optical product data descriptor Description Describes SFP/QSFP vendor Values Vendor name Model number Serial number Notes Allow for vendor/oem unique information? Bits Word 0 Product data descriptor tag 1 Product data descriptor length (48 bytes) 2-5 Vendor name 6-9 Model number Serial number 7

8 Contemplations Optical descriptors Description Unique descriptors for each element Values Module Temperature and Voltage Lane Bias, TX power, RX power Notes Separate descriptors all implementations to return supported/implemented alarms and warnings Not all elements need to be supported Eliminates the need for a valid bit Bits Word 0 Optical element descriptor tag 1 Optical element descriptor Length (12 bytes) 2 Low Warning High Warning 3 Low Alarm High Alarm 4 Flags Bit Description 31-6 Reserved 5-4 Lane Identifier: 00b = Lane 0 (zero for SFP) 01b = Lane 1 10b = Lane 2 11b = Lane 3 3 High alarm exceeded 2 Low alarm exceeded 1 High warning exceeded 0 Low warning exceeded 8

9 Pondering Optical Menagerie Seems I git one corrall d and another gits out E_Ports Them paths are a changin 9

10 What s left, partner? The road ahead Bring the cows home Accept text for FC LS-3 Round-up the stragglers Finalize the optical descriptors Deal with the stallions Figure out RPI or some such thing 10

11 End of Frame Thank You T11 FC-LS-3 11

12 References Notes from April Meeting 12

13 Agreements Login Required Login Required Yep Loop Ports if any FEC Descriptor Decision Leave FEC Descriptor as-is Descriptor Corrected blocks Uncorrectable blocks Bits Word 0 FEC Diagnostics descriptor Tag 1 FEC Diagnostics descriptor Length (8 bytes) 2 Number of corrected blocks 3 Number of uncorrectable blocks 13

14 Contemplations SFP FEC Active Flag Considering v1 An indication FEC is active would be nice to know Utilize a Reserved bit How about bit-15 in the SFP Flags field? Ponderings? Bit Description 15 8 Reserved 7 6 Connector Type: 00b = unknown 01b = SFP+ 10b - 11b = reserved 5 SFP Diagnostic Parameters not valid: If set to 1, the response does not include valid values for; a) Temperature; b) Vcc; c) Tx Bias; d) Tx Power; and e) Rx Power. 4 Optical Port: If set to 1, the FC_Port is an optical port. If set to 0, the FC_Port is not an optical port. 3-0 Port Tx Type: 0000b = Not optical or other type 0001b = Short Wave Laser 0010b = Long Wave Laser LC 1310nm 0011b = Long Wave Laser LL 1550nm 0100b b = reserved. 14

15 Contemplations E_Ports The trouble with E_Ports Determining existence Obtaining an N_Port_ID Knowing which one to query Observations RDP covers getting in and out of the fabric Diagnostics implicates the gross parts 15

16 Contemplations The Trouble with E_Ports V 20 W My N_Port A B U C X Y Z N_Port D 40 F E Your N_Port 16

17 Pondering Buffer Credit Descriptor Define descriptor My advertised credit My attached port s advertised credit What else? Optical Menagerie Still pondering 17

18 What s left, partner? The road ahead New Optional Descriptors Buffer Credit Descriptor Other Optics Descriptors Optical Menagerie 18

19 References Notes from February Meeting 19

20 New Items Optical Menagerie 20

21 FEC Descriptor Descriptor or Status Block Descriptor Counter Values Corrected blocks Uncorrectable blocks Status Block FEC Corrected blocks count FEC Uncorrectable blocks count Reserved Should we change the descriptor? Bits Word 0 FEC Diagnostics descriptor Tag 1 FEC Diagnostics descriptor Length (8 bytes) 2 Number of corrected blocks 3 Number of uncorrectable blocks Bits Word 0 FEC Status Block descriptor Tag 1 FEC Status Block descriptor Length (16 bytes) 2-5 FEC Status Block 21

22 Optics Diagnostics Product Data, Warnings, and Alarms Information from Optics Product Data Vendor Name Model Number Serial Number Warnings Exceed warning level on temperature, voltage, bias, or power Alarms Exceeded alarm level on temperature, voltage, bias, or power New descriptors When triggered? Always returned? Bits Word Threshold descriptor tag = h 1 Threshold descriptor length (40 bytes) Low Alarm Temperature High Alarm Temperature 3 Low Warning Temperature High Warning Temperature 4 Low Alarm Voltage High Alarm Voltage 5 Low Warning Voltage High Warning Voltage 6 Low Alarm Bias Current High Alarm Bias Current 7 Low Warning Bias Current High Warning Bias Current 8 Low Alarm TX Power High Alarm TX Power 9 Low Warning TX Power High Warning TX Power 10 Low Alarm Rx Power Low Alarm Rx Power 11 Low Warning Rx Power High Warning Rx Power 22

23 Optics Diagnostics Comments from Babu Recommendations Always send product, threshold, and flags descriptors Waiting until "triggered" event may too late Unable to read the data when event is triggered due to the failure Bits Word Warning flags descriptor tag = h 1 Warning flags descriptor length (20 bytes) 2 Module Alarm flags Module Warning flags 3 Channel-1 Alarm flags * Channel-1 Warning flags 4 Channel-2 Alarm flags Channel-2 Warning flags 5 Channel-3 Alarm flags Channel-3 Warning flags 6 Channel-4 Alarm flags Channel-4 Warning flags Optional descriptors Should we add a flag in request to limit descriptors sent? 23

24 Text Changes Changes from December Meeting for Reference 24

25 RDP Diagnostic Descriptors Tag Values and Descriptions Required Link Service Request Information descriptor Port Speed descriptor Link Error Status Block descriptor Port Names descriptor Required either SFP Diagnostics descriptor QSFP Diagnostics descriptor Optional FEC Status descriptor Tag value Descriptor h Link Service Request Information h Reserved h N_Port_ID Descriptor h SFP Diagnostics descriptor h Port Speed descriptor h Link Error Status Block descriptor h Port Names descriptor h QSFP Diagnostics descriptor h FEC Status descriptor All other values Reserved 25

26 QSFP Flags Definition Not Valid One bit for component wide readings and all lane readings Port Tx Type Assumed the Long Wave laser types will also be LC and LL for single mode. Bit Description 15 8 (see next slide) 7 6 Connector Type: 00b = Other or unknown 01b = QSFP 10b - 11b = reserved 5 QSFP Diagnostic Parameters not valid: If set to 1, the response does not include valid values for; a) Temperature; b) Vcc; c) Tx Bias for any lane; d) Tx Power for any lane; and e) Rx Power for any lane. 4 Optical Port: If set to 1, the FC_Port is an optical port. If set to 0, the FC_Port is not an optical port. 3-0 Port Tx Type: 0000b = Other or unknown 0001b = Short Wave Laser 0010b = Long Wave Laser LC 1310nm 0011b = Long Wave Laser LL 1550nm 0100b b = reserved. 26

27 QSFP Flags Definition (continued) Lane Identifier Indicates lane corresponding to this response Lane Identifier Valid Indicates if the QSFP is operating in parallel lane mode Bit Description Reserved 10 9 Lane Identifier: 00b = Lane 0 01b = Lane 1 10b = Lane 2 11b = Lane 3 8 Lane Identifier Valid: If set to 1, the response is for the single lane indicated by the Lane Identifier. If set to 0, the Lane Identifier is not meaningful. 27

28 What s left, partner? The road ahead Just E_Ports And an expanding horizon 28

29 References Notes from December Meeting 29

30 RDP Diagnostic Descriptors Tag Values and Descriptions Required Link Service Request Information descriptor Port Speed descriptor Link Error Status Block descriptor Port Names descriptor Required either SFP Diagnostics descriptor QSFP Diagnostics descriptor Optional FEC Status descriptor Tag value Descriptor h Link Service Request Information h h N_Port_ID Descriptor h SFP Diagnostics descriptor h Port Speed descriptor h Link Error Status Block descriptor h Port Names descriptor h QSFP Diagnostics descriptor h FEC Status descriptor All other values Reserved 30

31 QSFP Descriptor Definition Common Statistics Temperature Votage Flags Per Lane Statistics Tx Bias and Power Rx Power Bits Word 0 QSFP Diagnostics descriptor Tag 1 QSFP Diagnostics descriptor Length (40-bytes) 2 Temperature Vcc 3 Reserved QSFP Flags 4 Lane 0 - Tx Bias Lane 0 - Tx Power 5 Lane 0 - Rx Power Reserved 6 Lane 1 - Tx Bias Lane 1 - Tx Power 7 Lane 1 - Rx Power Reserved 8 Lane 2 - Tx Bias Lane 2 - Tx Power 9 Lane 2 - Rx Power Reserved 10 Lane 3 - Tx Bias Lane 3 - Tx Power 11 Lane 3 - Rx Power Reserved 31

32 QSFP Flags Definition Not Valid One bit for component wide readings and all lane readings Port Tx Type Assumed the Long Wave laser types will also be LC and LL for single mode. Bit Description 15 8 (see next slide) 7 6 Connector Type: 00b = unknown 01b = QSFP 10b - 11b = reserved 5 QSFP Diagnostic Parameters not valid: If set to 1, the response does not include valid values for; a) Temperature; b) Vcc; c) Tx Bias for any lane; d) Tx Power for any lane; and e) Rx Power for any lane. 4 Optical Port: If set to 1, the FC_Port is an optical port. If set to 0, the FC_Port is not an optical port. 3-0 Port Tx Type: 0000b = Not optical or other type 0001b = Short Wave Laser 0010b = Long Wave Laser LC 1310nm 0011b = Long Wave Laser LL 1550nm 0100b b = reserved. 32

33 QSFP Flags Definition (continued) Lane Identifier Indicates lane corresponding to this response QSFP Lane Diagnostic Parameters validity indicator Set if QSFP diagnostic parameters are invalid for this lane Bit Description Reserved 10 9 Lane Identifier: 00b = Lane 0 01b = Lane 1 10b = Lane 2 11b = Lane 3 8 Breakout Operation: If set to 1, the response is for the lane indicated by the Lane Identifier. If set to 0, the Lane Identifier is not meaningful. Breakout Operation Indicates QSFP is operating in breakout mode 33

34 FEC Descriptor Definition Counter Values Corrected blocks Uncorrectable blocks Bits Word 0 FEC Diagnostics descriptor Tag 1 FEC Diagnostics descriptor Length (8 bytes) 2 Corrected blocks 3 Uncorrectable blocks 34

35 Coming Attractions See you in St. Petersburg Login Required if the N_Port_ID is not logged in with an F_Port within the domain, the Domain Controller should reply with an LS_RJT specifying a reason code of Logical error (03h) and reason code explanation Invalid N_Port_ID (1Fh). Loop Ports Remind me again what s the issue with sending an RDP to a loop port? E_Ports I m waiting on getting QSFPs done and in the text before we tackle this one. 35

36 References Notes from October Meeting 36

37 SFP Descriptor Reference Fundamental Statistics Temperature Votage Tx Bias and Power Rx Power Flags Bits Word 0 SFP Diagnostics descriptor Tag 1 SFP Diagnostics descriptor Length (12-bytes) 2 Temperature Vcc 3 Tx Bias Tx Power 4 Rx Power SFP Flags No change to current proposal 37

38 SFP Flags Per SFP Connector Type Changed from 4-bits to 2-bits Return to original proposal (minus reference to QSFP ;-) Future connector types Represented by new descriptors Bit Description 15 8 Reserved 7 6 Connector Type: 00b = unknown 01b = SFP+ 10b - 11b = reserved 5 SFP Diagnostic Parameters not valid: If set to 1, the response does not include valid values for; a) Temperature; b) Vcc; c) Tx Bias; d) Tx Power; and e) Rx Power. 4 Optical Port: If set to 1, the FC_Port is an optical port. If set to 0, the FC_Port is not an optical port. 3-0 Port Tx Type: 0000b = Not optical or other type 0001b = Short Wave Laser 0010b = Long Wave Laser LC 1310nm 0011b = Long Wave Laser LL 1550nm 0100b b = reserved. 38

39 QSFP Descriptor Proposed Common Statistics Temperature Votage Flags Per Lane Statistics Tx Bias and Power Rx Power Removed lane flags Bits Word 0 QSFP Diagnostics descriptor Tag 1 QSFP Diagnostics descriptor Length (40-bytes) 2 Temperature Vcc 3 Reserved QSFP Flags 4 Lane 0 - Tx Bias Lane 0 - Tx Power 5 Lane 0 - Rx Power Reserved 6 Lane 1 - Tx Bias Lane 1 - Tx Power 7 Lane 1 - Rx Power Reserved 8 Lane 2 - Tx Bias Lane 2 - Tx Power 9 Lane 2 - Rx Power Reserved 10 Lane 3 - Tx Bias Lane 3 - Tx Power 11 Lane 3 - Rx Power Reserved 39

40 QSFP Flags Proposed per QSFP Connector Type Changed from 4-bits to 2-bits Consistent with SFP Flags field Port Tx Type What are the long wave options? 1310nm/1550nm/? Bit Description 15 8 (see next slide) 7 6 Connector Type: 00b = unknown 01b = QSFP 10b - 11b = reserved 5 QSFP Diagnostic Parameters not valid: If set to 1, the response does not include valid values for; a) Temperature; and, b) Vcc. 4 Optical Port: If set to 1, the FC_Port is an optical port. If set to 0, the FC_Port is not an optical port. 3-0 Port Tx Type: 0000b = Not optical or other type 0001b = Short Wave Laser 0010b = Long Wave Laser 0011b b = reserved. 40

41 QSFP Flags Proposed per QSFP (continued) Lane Identifier Indicates lane corresponding to this response QSFP Lane Diagnostic Parameters validity indicator Set if QSFP diagnostic parameters are invalid for this lane Bit Description Reserved Lane Identifier: 00b = Lane 0 01b = Lane 1 10b = Lane 2 11b = Lane 3 9 QSFP Lane Diagnostic Parameters not valid: If set to 1, the response does not include valid values for; a) Tx Bias; b) Tx Power; and c) Rx Power. 8 Breakout Operation: If set to 1, the response is for the lane indicated by the Lane Identifier. Breakout Operation Indicates QSFP is operating in breakout mode 41

42 FEC Descriptor Same descriptor, different description Counter Values Corrected blocks Uncorrectable blocks Bits Word 0 FEC Diagnostics descriptor Tag 1 FEC Diagnostics descriptor Length (8 bytes) 2 Number of corrected blocks 3 Number of uncorrectable blocks 42

43 Coming Attractions See you in St. Petersburg Login Required Same as RLS? Loop Ports Do we have too? E_Ports Let the Fabric do it? 43

44 References Notes from August Meeting 44

45 RDP Summary The new language The diagnostic parameter descriptors (see ) in an RDP LS_ACC shall include; a) a Link Service Request Information descriptor; b) a Port Speed descriptor; c) a Link Error Status Block descriptor; d) a Port Names descriptor for the Fx_Port or Nx_Port for which diagnostic parameters are being provided; and e) a Port Names descriptor for the directly attached Fx_Port or Nx_Port. The diagnostic parameter descriptors in an RDP LS_ACC shall include either; a) an SFP Diagnostics descriptor; or b) a QSFP Diagnostics descriptor. The diagnostic parameter descriptors in an RDP LS_ACC may include; a) a FEC Status descriptor. 45

46 QSFP Descriptor Provided instead of an SFP Descriptor Bits Word QSFP Diagnostics descriptor Tag 1 QSFP Diagnostics descriptor Length (40-bytes) 2 Temperature Vcc 3 reserved QSFP Flags 4 Lane 0 - Tx Bias Lane 0 - Tx Power 5 Lane 0 - Rx Power Lane 0 Flags 6 Lane 1 - Tx Bias Lane 1 - Tx Power 7 Lane 1 - Rx Power Lane 1 Flags 8 Lane 2 - Tx Bias Lane 2 - Tx Power 9 Lane 2 - Rx Power Lane 2 Flags 10 Lane 3 - Tx Bias Lane 3 - Tx Power 11 Lane 3 - Rx Power Lane 3 Flags 46

47 QSFP Flags Per QSFP Bit Description Reserved 9 6 Connector Type: 0000b = unknown 0001b = QSFP 0010b b = reserved 5 QSFP Diagnostic Parameters not valid: If set to 1, the response does not include valid values for; a) Temperature; and, b) Vcc. 4 Optical Port: If set to 1, the FC_Port is an optical port. If set to 0, the FC_Port is not an optical port. 3-0 Port Tx Type: 0000b = Not optical or other type 0001b = Short Wave Laser 0010b = Long Wave Laser 0011b b = reserved. 47

48 Lane Flags Per Lane Bit Description 15 1 Reserved 0 QSFP Lane Diagnostic Parameters not valid: If set to 1, the response does not include valid values for; a) Tx Bias; b) Tx Power; and c) Rx Power. 48

49 FEC Descriptor Optionally provided Bits Word FEC Diagnostics descriptor Tag 1 FEC Diagnostics descriptor Length (8 bytes) 2 Number of corrected blocks 3 Number of uncorrected blocks 49

50 E_Ports Anyone? 50

51 Addressing Rules Works great for N_Ports and F_Ports My F_Port If the D_ID is the F_Port Controller Well-known address (FFFFFEh), the N_Port_ID in the N_Port_ID descriptor shall be set to the S_ID of the request. The diagnostic parameters requested are for the Fx_Port through which the N_Port_ID is logged in My F_Port D_ID == F_Port Controller S_ID == My N_Port_ID N_Port_ID == My N_Port_ID Your F_Port If the D_ID is a Domain Controller well known address (FFFCxxh), the N_Port_ID in the N_Port_ID descriptor shall be set to an N_Port_ID within the associated domain. The diagnostic parameters requested are for the Fx_Port through which the N_Port_ID is logged in Your N_Port For all other D_IDs, the N_Port_ID in the N_Port_ID descriptor shall be set to the D_ID of the request. The diagnostic parameters requested are for Nx_Port to which the D_ID is assigned Your F_Port D_ID == Your Domain Controller S_ID == My N_Port_ID N_Port_ID == Your N_Port_ID Your N_Port D_ID == Your N_Port_ID SID == My N_Port_ID N_Port_ID == Your N_Port_ID 51

52 Read Diagnostic Parameters What s missing? V 20 W My N_Port A B U C X Y Z N_Port D 40 F E Your N_Port 52

53 Read Diagnostic Parameters What s missing? My F_Port (F_Port Controller) V 20 W My N_Port A B U C X Y Z N_Port D 40 F E Your N_Port 53

54 Read Diagnostic Parameters What s missing? V 20 W My N_Port A B U C X Y Z N_Port D 40 F E Your N_Port Your F_Port (Domain Controller) 54

55 Read Diagnostic Parameters What s missing? V 20 W My N_Port A B U C X Y Z N_Port Your N_Port (N_Port_ID) D 40 F E Your N_Port 55

56 Read Diagnostic Parameters What s missing? My F_Port (F_Port Controller) V 20 W My N_Port A B U C We can t get the E_Ports! X Y Z N_Port Your N_Port (N_Port_ID) D 40 E Your F_Port (Domain Controller) F Your N_Port 56

57 Let s Add a Rule D_ID is the Domain Controller (but not for Your N_Port_ID) Our Flow Definition If the D_ID is a Domain Controller well known address (FFFCxxh) and the N_Port_ID in the N_Port_ID descriptor is set to an N_Port_ID not on the associated domain, the diagnostic parameters requested are for Ex_Port(s) through which the N_Port_ID is accessed Our Flow Description The fabric returns an RDP LS_ACC for each possible Ex_Port traversed to reach the N_Port_ID. The fabric forwards the request to each hop in the fabric and floods the responses back. The S_ID is updated to reflect the Domain Controller of the forwarding switch. The exchange remains open until the last response is processed. Our Flow Addressing D_ID == Domain Controller S_ID == My N_Port_ID then Domain Controller for My Switch then Domain Controller for Next Switch then Domain Controller for Your Switch. N_Port_ID == Your N_Port_ID 57

58 Read Diagnostic Parameters What s missing? Our Flow (Domain Controller == 10 && Your N_Port_ID) My N_Port A B Our Flow (Domain Controller == 20 && Your N_Port_ID) U C V D 40 W Our Flow (Domain Controller == 30 && Your N_Port_ID) 1. Domain 10 sends back diagnostics for U. 2. Domain 20 sends back diagnostics for V and W. 3. Domain 30 sends back diagnostics for X and closes the exchange. E X F Y Z Your N_Port 58

59 References Notes from June Meeting 59

60 RDP Descriptors Let s Change the Language Descriptors can appear in any order Except, the Link Service Request Information descriptor must come first The rest shall be: Port Speed descriptor Link Error Status Block descriptor Port Names descriptors The Fx_Port or Nx_Port for which diagnostic parameters are being provided The directly attached Fx_Port or Nx_Port And, they may all come in any order Except, the Link Service Request Information descriptor, which must come first 60

61 RDP Descriptors Optical Descriptors for Everyone Thou shalt supply either An SFP Descriptor Temperature, Voltage Tx Bias, Tx Power, Rx Power, Flags Or, a QSFP Descriptor Temperature, Voltage, Flags Appears Once per descriptor Tx Bias, Tx Power, Rx Power Appears per fiber pair (4 times) Thou shalt not supply neither nor both, but either (and not neighther) 61

62 RDP Descriptors Just a FECing Descriptor Optionally, and in any order (except not first, for that is reserved for the Link Service Request Information descriptor, which must come first) A FEC Status Descriptor Count of Uncorrected Errors Count of Corrected Errors One word per counter 62

63 RDP Summary Descriptors And the descriptors are: Link Service Request Information Port Speed LESB Port Name of diagnosed port Port Name of directly attached port Optical Characteristics of your choice And sometimes, the FEC Counters 63

64 RDP Summary Suggested Text The diagnostic parameter descriptors (see ) in an RDP LS_ACC shall include; a) a Link Service Request Information descriptor; b) a Port Speed descriptor; c) a Link Error Status Block descriptor; d) a Port Names descriptor for the Fx_Port or Nx_Port for which diagnostic parameters are being provided; and e) a Port Names descriptor for the directly attached Fx_Port or Nx_Port. The diagnostic parameter descriptors in an RDP LS_ACC shall include either; a) an SFP Diagnostics descriptor; or b) a QSFP Diagnostics descriptor. The diagnostic parameter descriptors in an RDP LS_ACC may include; a) a FEC Status descriptor. 64

65 References Notes from April Meeting 65

66 Suggestion for 128GFC QSFP Diagnostic Parameters descriptor New Descriptor Type Unique for QSFP Used instead of SFP Diagnostic Parameters descriptor in reply Fields QSFP wide (case) Temperature Voltage Per lane (fiber pair) Tx Bias Tx Power Rx Power Flags 66

67 Questions QSFP unique things General Should there be a count of lanes? Descriptor for each lane (use SFP descriptor format)? Should there be separate validity flags for the component (i.e. temperature and voltage)? Or, just replicate the validity within the flags for each lane? Parallel Operation How do we distinguish the lanes in the descriptor? Does it matter? Break-out Operation Can the SFP descriptor be used? Need flag indicating QSFP running in break-out 67

68 RDP Descriptor FC-LS Reply Sequence The diagnostic parameter descriptors (see ) in an RDP LS_ACC shall include; a) a Link Service Request Information descriptor; b) an SFP Diagnostics descriptor; c) a Port Speed descriptor; d) a Link Error Status Block descriptor; e) a Port Names descriptor for the Fx_Port or Nx_Port for which diagnostic parameters are being provided; and f) a Port Names descriptor for the directly attached Fx_Port or Nx_Port. 68

69 RDP Descriptor FC-LS Diagnostic parameter descriptors LESB expands to FEC corrections? SFP descriptor becomes Module descriptor Lane descriptor(s) 69

70 LESB FC-FS Link Error Status Block The errors shown in table 94 are accumulated over time within a PN_Port. The format shown is the format in which the LESB information shall be supplied in response to an RLS ELS. It does not require any specific hardware or software implementation. The errors accumulated provide a coarse measure of the integrity of the link over time. No means are provided to reset a counter in the LESB; however, on overflow it shall be set to zero and then continue counting. The counts shall be 32 bit values. 70

71 This slide intentionally left blank Thank You T11 FC-LS-3 71