Port Speed configuration Follow
-
Examples:
- Configure 10G interface (SFP+) to be 1G interface
- Configure 100G interface (QSFP+) to be 40G interface
Restriction:
- known issue: It does not return failed if configure wrong speed on interface
e.g: configure1000Gon the interface
- Known issue:
On AS5835-54X, when we down speed the Ethernet0 to 1G, it will let Ethernet1, Ethernet2, Ethernet3 down speed to 1G hiddenly.
It belongs to the port group issue, four ports are a group, for example, Ethernet 0-3 is a group, Ethernet 4-7 is another one ...
So now, changing the port speed will modify the group speed, not the port speed. This issue will happened on SFP interface(Ethernet0-Ethernet47).
admin@sonic:~$ sudo config interface speed Ethernet0 1000
admin@sonic:~$ sshow interfaces status | head -n 6
Interface Lanes Speed MTU FEC Alias Vlan Oper Admin Type Asym PFC
----------- ----------- ------- ----- ----- ------- ------ ------ ------- -------------- ----------
Ethernet0 1 1G 9100 N/A Eth1/1 routed down up SFP/SFP+/SFP28 N/A
Ethernet1 2 10G 9100 N/A Eth2/1 routed down up SFP/SFP+/SFP28 N/A
Ethernet2 3 10G 9100 N/A Eth3/1 routed down up N/A N/A
Ethernet3 4 10G 9100 N/A Eth4/1 routed down up N/A N/A
admin@sonic:~$ bcmcmd 'ps' | head -n 10
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) down 1 1G FD SW No Forward None F SGMII 9122 No
ge1( 2) down 1 1G FD SW No Forward None F SGMII 9122 No
ge2( 3) down 1 1G FD SW No Forward None F SGMII 9122 No
ge3( 4) down 1 1G FD SW No Forward None F SGMII 9122 No
xe0( 5) down 1 10G FD SW No Forward None F XFI 9122 No
xe1( 6) down 1 10G FD SW No Forward None F XFI 9122 No
xe2( 7) down 1 10G FD SW No Forward None F XFI 9122 No
Reference model:
- Switch model name: AS5835-54X
- Edgecore SONiC version: SONiC.Edgecore-SONiC_20201123_130028_ec202006_74
Procedure:
Steps 1. Configure 10G interface (SFP+) to be 1G interface.
Ethernet0 and Ethernet1 as an example.
Caution:
-
Make sure Tx_Disable is Disabled on 10G interface. Otherwise, the 10G port can NOT link UP even speed configuration is correct. (1: transmit power is disable, 0: transmit power is enable ,default is 1)
Method: use "accton_as5835_54x_util.py set sfp 1-48 {0|1}" to set sfp# tx_disable
For example: disable the tx_disable on Ethernet0 and Ethernet1
admin@sonic:~$ sudo accton_as5835_54x_util.py set sfp 1 0
admin@sonic:~$ sudo accton_as5835_54x_util.py set sfp 2 0
Check command
admin@sonic:~$ sudo accton_as5835_54x_util.py show
omitted...
============================================
SFP:
============================================
sfp1: module_present_1=1 module_tx_disable_1=0
----------------------------------------------------------------
sfp2: module_present_2=1 module_tx_disable_2=0
----------------------------------------------------------------
sfp3: module_present_3=0 module_tx_disable_3=1
omitted...
Steps 2. Configure 100G interface (QSFP) to be 40G interface.
Ethernet48 and Ethernet52 as an example.
Steps 3. Save the configuration to config_db.json
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 N/A Eth1/1 routed down up SFP/SFP+/SFP28 N/A
Ethernet1 2 1G 9100 N/A Eth2/1 routed down up SFP/SFP+/SFP28 N/A
Ethernet48 37,38,39,40 40G 9100 N/A Eth49/1 routed down up QSFP+ or later N/A
Ethernet52 29,30,31,32 40G 9100 N/A Eth50/1 routed down up QSFP+ or later N/A
Appendix:
Check port speed by bcmshell
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