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Port Speed configuration

kojui_chang 張恪睿
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Examples:

  1. Configure 10G interface (SFP+) to be 1G interface
  2. Configure 100G interface (QSFP+) to be 40G interface

Restriction:

  1. Require additional settings for Port Type changes. i.g
    • Breakout Cable QSFP+ to 4 x SFP+/SFP28
    • AS7326-56X 25G to 10G (refer to this article)
    • AS7816-64X 100G to 10G/25G (refer to this article)
  2. known issue:  It does not return failed if configure wrong speed on interface

    e.g: configure 1000G on the interface

    admin@sonic:~$ sudo config interface speed Ethernet2 1000000
 
  admin@sonic:~$ show interfaces status | head -n 5
  Interface            Lanes    Speed    MTU          Alias    Vlan    Oper    Admin             Type    Asym PFC
-----------  ---------------  -------  -----  -------------  ------  ------  -------  ---------------  ----------
  Ethernet0               73      10G   9100         swp001   trunk      up       up   QSFP+ or later         N/A
  Ethernet1               74      10G   9100         swp002   trunk      up       up   QSFP+ or later         N/A
  Ethernet2               75    1000G   9100         swp003  routed    down       up              N/A         N/A

Reference model:

  • Switch model name: AS5835-54X
  • Edgecore SONiC version: SONiC.Edgecore-SONiC_20191003_122002_ec201904_175 

Procedure:

Steps 1. Configure 10G interface (SFP+) to be 1G interface.  

Ethernet0 and Ethernet1 as an example.

admin@sonic:~$ sudo config interface speed Ethernet0 1000
admin@sonic:~$ sudo config interface speed Ethernet1 1000

Caution: 

  1. Please make sure port name (i.e Ethernet0) is correct. Otherwise it does not work.
  2. Make sure Tx_Disable is Disabled on 10G interface. Otherwise, the 10G port can NOT link UP even speed configuration is correct. (refer to this article)
  3. admin@sonic:~$ echo 0 | sudo tee /sys/bus/i2c/devices/3-0061/module_tx_disable_1
    admin@sonic:~$ echo 0 | sudo tee /sys/bus/i2c/devices/3-0061/module_tx_disable_2

Steps 2. Configure 100G interface (QSFP) to be 40G interface.

Ethernet48 and Ethernet52 as an example.

admin@sonic:~$ sudo config interface speed Ethernet48 40000
admin@sonic:~$ sudo config interface speed Ethernet52 40000

Caution: please make sure port name is correct. Otherwise it does not work.

Steps 3. Save the configuration to config_db.json

admin@sonic:~$ sudo config save -y

Steps 4. Check the port speed setting on config_db.json

admin@sonic:~$ sudo vi /etc/sonic/config_db.json    
{
   omitted...
   "PORT": {
      "Ethernet0": {
         "admin_status": "up",
         "alias": "tenGigE1",
         "index": "1",
         "lanes": "1",
         "mtu": "9100",
         "speed": "1000"
      },
      "Ethernet1": {
         "admin_status": "up",
         "alias": "tenGigE2",
         "index": "2",
         "lanes": "2",
         "mtu": "9100",
         "speed": "1000"
      },
      omitted...
      "Ethernet48": {
         "admin_status": "up",
         "alias": "hundredGigE49",
         "index": "49",
         "lanes": "37,38,39,40",
         "mtu": "9100",
         "speed": "40000"
      },
      "Ethernet52": {
         "admin_status": "up",
         "alias": "hundredGigE50",
         "index": "53",
         "lanes": "29,30,31,32",
         "mtu": "9100",
         "speed": "40000"
      },
   omitted...
}

Steps 5. Check the port speed by SONiC command

admin@sonic:~$ show interface status | grep 'Ethernet0 \|Ethernet1 \|Ethernet48\|Ethernet52' 
 Ethernet0 1 1G 9100 tenGigE1 routed up up SFP/SFP+/SFP28 N/A
 Ethernet1 2 1G 9100 tenGigE2 routed up up SFP/SFP+/SFP28 N/A
 Ethernet48 37,38,39,40 40G 9100 hundredGigE49 routed up up QSFP+ or later N/A
 Ethernet52 29,30,31,32 40G 9100 hundredGigE50 routed up up QSFP+ or later N/A

 

Appendix: 

Check port speed by bcmshell

admin@sonic:~$ bcmcmd 'ps'
 ps
 ena/ speed/ link auto STP lrn inter max cut loop
 port link Lns duplex scan neg? state pause discrd ops face frame thru? back
 ge0( 1) up 1 1G FD SW No Forward TX RX None F SGMII 9122 No
 ge1( 2) up 1 1G FD SW No Forward TX RX None F SGMII 9122 No
 xe0( 3) down 1 10G FD SW No Forward None F XFI 9122 No
 xe1( 4) down 1 10G FD SW No Forward None F XFI 9122 No
 xe2( 5) down 1 10G FD SW No Forward None F XFI 9122 No
 xe3( 6) down 1 10G FD SW No Forward None F XFI 9122 No
 xe4( 7) down 1 10G FD SW No Forward None F XFI 9122 No
 xe5( 8) down 1 10G FD SW No Forward None F XFI 9122 No
 xe6( 9) down 1 10G FD SW No Forward None F XFI 9122 No
 xe7( 10) down 1 10G FD SW No Forward None F XFI 9122 No
 xe8( 11) down 1 10G FD SW No Forward None F XFI 9122 No
 xe9( 12) down 1 10G FD SW No Forward None F XFI 9122 No
 xe10( 13) down 1 10G FD SW No Forward None F XFI 9122 No
 xe11( 14) down 1 10G FD SW No Forward None F XFI 9122 No
 xe12( 15) down 1 10G FD SW No Forward None F XFI 9122 No
 xe13( 16) down 1 10G FD SW No Forward None F XFI 9122 No
 xe14( 17) down 1 10G FD SW No Forward None F XFI 9122 No
 xe15( 18) down 1 10G FD SW No Forward None F XFI 9122 No
 xe16( 19) down 1 10G FD SW No Forward None F XFI 9122 No
 xe17( 20) down 1 10G FD SW No Forward None F XFI 9122 No
 xe18( 21) down 1 10G FD SW No Forward None F XFI 9122 No
 xe19( 22) down 1 10G FD SW No Forward None F XFI 9122 No
 xe20( 23) down 1 10G FD SW No Forward None F XFI 9122 No
 xe21( 24) down 1 10G FD SW No Forward None F XFI 9122 No
 xe22( 39) down 1 10G FD SW No Forward None F XFI 9122 No
 xe23( 40) down 1 10G FD SW No Forward None F XFI 9122 No
 xe24( 41) down 1 10G FD SW No Forward None F XFI 9122 No
 xe25( 42) down 1 10G FD SW No Forward None F XFI 9122 No
 xe26( 43) down 1 10G FD SW No Forward None F XFI 9122 No
 xe27( 44) down 1 10G FD SW No Forward None F XFI 9122 No
 xe28( 45) down 1 10G FD SW No Forward None F XFI 9122 No
 xe29( 46) down 1 10G FD SW No Forward None F XFI 9122 No
 xe30( 47) down 1 10G FD SW No Forward None F XFI 9122 No
 xe31( 48) down 1 10G FD SW No Forward None F XFI 9122 No
 xe32( 49) down 1 10G FD SW No Forward None F XFI 9122 No
 xe33( 50) down 1 10G FD SW No Forward None F XFI 9122 No
 xe34( 51) down 1 10G FD SW No Forward None F XFI 9122 No
 xe35( 52) down 1 10G FD SW No Forward None F XFI 9122 No
 xe36( 53) down 1 10G FD SW No Forward None F XFI 9122 No
 xe37( 54) down 1 10G FD SW No Forward None F XFI 9122 No
 xe38( 55) down 1 10G FD SW No Forward None F XFI 9122 No
 xe39( 56) down 1 10G FD SW No Forward None F XFI 9122 No
 xe40( 57) down 1 10G FD SW No Forward None F XFI 9122 No
 xe41( 58) down 1 10G FD SW No Forward None F XFI 9122 No
 xe42( 59) down 1 10G FD SW No Forward None F XFI 9122 No
 xe43( 60) down 1 10G FD SW No Forward None F XFI 9122 No
 xe44( 61) down 1 10G FD SW No Forward None F XFI 9122 No
 xe45( 62) down 1 10G FD SW No Forward None F XFI 9122 No
 xe46( 27) up 4 40G FD SW No Forward TX RX None F XLAUI 9122 No
 xe47( 25) up 4 40G FD SW No Forward TX RX None F XLAUI 9122 No
 ce0( 26) down 4 100G FD SW No Forward None F CAUI4 9122 No
 ce1( 35) down 4 100G FD SW No Forward None F CAUI4 9122 No
 ce2( 34) down 4 100G FD SW No Forward None F CAUI4 9122 No
 ce3( 33) down 4 100G FD SW No Forward None F CAUI4 9122 No
 xe48( 64) down 1 10G FD SW No Forward None FA XFI 9412 No

drivshell>

 

 

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