波長多重の波長を設定する

C band DWDM対応の光トランシーバーには、機器側から運用中に波長を指定する場合と。運用前に波長を指定して機器では通常の固定波長と同様品として運用する場合があります。

SFF-8690 Tunable SFP+ Memory Map for ITU Frequencies

SFF-8636 page 20h 200 Parameter Configuration Registers

マルチレートの指定

SFF-8636 page 00h 87,88

2.2Gb以下/6.6Gb以下/12Gb以下/24Gb以下/26Gb以下/26Gb以上

アラーム温度を再設定する

temperature

 Module temperature high alarm threshold   : 80.00 degrees C / 176.00 degrees F
 Module temperature low alarm threshold    : -10.00 degrees C / 14.00 degrees F
 Module temperature high warning threshold : 75.00 degrees C / 167.00 degrees F
 Module temperature low warning threshold  : -5.00 degrees C / 23.00 degrees F

Table 6-27 Free Side Device and Channel Thresholds (Page 03h Bytes 128-223)

128-129 : Temp High Alarm

http://www.mellanox.com/related-docs/prod_management_software/MLNX-OS_ETH_v3_6_3508_UM.pdf

P616

EdgeOSの場合だとsnmp trapの設定が可能で。

transceiver-threshold current

transceiver-threshold temperature

transceiver-threshold rx-power

transceiver-threshold tx-power

transceiver-threshold voltage

Console#show interfaces transceiver-threshold ethernet 1/25
Information of Eth 1/25
DDM Thresholds
Low Alarm Low Warning High Warning High Alarm
----------- ------------ ------------ ------------ ------------
Temperature(Celsius) -123.00 0.00 70.00 75.00
Voltage(Volts) 3.10 3.15 3.45 3.50
Current(mA) 6.00 7.00 90.00 100.00
TxPower(dBm) -12.00 -11.50 -9.50 -9.00
RxPower(dBm) -21.50 -21.00 -3.50 -3.00

この機能を実現するためには、トランシーバー側からのイベント信号が必要であり。SFF-8636にてoptionalとなっているpage 03に対応するレジスタがある。

page 03 128-175 read only, VCC and temp

page 03 176-223 read only, each  ch TX,RS powr and bias

are? read only ?

writeが出来るのはpage 20h 200-247 Parameter Configuration Registers

page 21h 128-255 Threshold Registers

Rate Select and Configuration for Multi-rate Modules

  • Enable/Disable (bypass) Tx and Rx CDRs 12
  • Enable/Disable/Adjust Tx input equalizers and set fixed or adaptive modes of operation 13
  • Enable/Disable/Adjust Rx output emphasis and Rx output amplitude 14
  • Adjust the bandwidth and/or gain of internal components

SFF-8079 Specification for SFP Rate and Application Selection

 

password

SFF-8472

Vendor Specific Locations [Address A2h, Bytes 120-127] Addresses 120 – 127 are defined for vendor specific memory functions. Potential usage includes vendor password field for protected functions, scratch space for calculations or other proprietary content.

https://www.youtube.com/watch?v=tJ8LMR5zJxY

SFF-8472以前のFINISAR準拠だとbyte位置が異なる

bytes 123(7Bh)-126の4byte 32bitがパスワード領域であり、デフォルトは"00 00 00 00"一度ここに正しいパスワードが書き込まれるとEEPROM領域の書き換えが可能になる。A2h 128-247

もっとも120-123がreserveで127が書き込むpage selectなので互換性はある。

SFF-8636 Rev 2.9.3

page 02hはVendor Specific Page 

Bytes 119-126 are reserved for an optional password entry function.

119-122 Password Change

123-126 Password Entry

Fixed side manufacturer and free side device manufacturer passwords

fixed side manufacturer passwords shall fall in the range of 00000000h to 7FFFFFFFh

initially set to 00001011h in new modules.

free side device manufacturer passwords in the range of 80000000h to FFFFFFFFh

Rate Select and Configuration for Multi-rate Modules

Table 5-3 Writable Memory Blocks

      description  
page 00h      
86 1 R/W Control Register V
87   R/W Rx Rate select Register V
88   R/W Tx Rate select Register V
89-92   R/W   V
93   R/W   V
94-97   R/W   V
98   R/W   V
99   R/W   V
100-104   R/W   V
105-106   R/W   V
107   R/W   V
111-112   R/W   V
115-118       V
119-122   W password change entry area V
123-126   W password entry area V
127   R/W page select byte V
page 02h      
128-255 128 R/W User Writable Memory NV
page 03h      
226-241 16 R/W Optional Channel Controls V
242-251 10 R/W Channel Monitor Masks V
252-255 4 R/W Reserved V
page 20h      
140-151     Interrupt mask bits for monitored parameters V
250     Counters reset function V


V: Volatile 揮発性、電源を切れば保存されない(passwordだけは特殊な扱い)

User Accessible EEPROM Locations [Address A2h, Bytes 128-247]

 

Links

https://xmms.jp/confluence/display/INFLA/Hack+the+SFP


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