AS7326-56X change port speed

admin@NSK-BR01-1:~$ show interface status Ethernet13
 Interface    Lanes    Speed    MTU    Oper FEC            Alias    Vlan    Oper    Admin    ProtoDown    Eff Admin            Type    Asym PFC
-----------  -------  -------  -----  ----------  ---------------  ------  ------  -------  -----------  -----------  --------------  ----------
Ethernet13       22      25G   9100        none  Eth18/2(Port14)  routed    down       up        False           up  SFP/SFP+/SFP28         N/A


admin@NSK-BR01-1:~$ sudo config interface speed Ethernet13 1000

Due to the special circuit scheme on PCB of this device, the port specified
in the command is one of the child port out of 4 internally broken out ports.
To change port speed as 1G or 10G, you must use "config interface breakout"
command to change the port breakout mode as "4x10G[1G]". This will change
port speed as 10G upon 4 ports at the same time. Under "4x10G[1G]" breakout mode,
it is allowed to use "config interface speed" command to set port speed upon
any port out of those 4 ports as 1G or 10G.


admin@NSK-BR01-1:~$ show interface breakout
<...>
    "Ethernet17": {
       "index": "18,14,13,15",
       "lanes": "21,22,23,24",
       "breakout_modes": {
           "4x25G": [
               "Eth18/1(Port18)",
               "Eth18/2(Port14)",
               "Eth18/3(Port13)",
               "Eth18/4(Port15)"
           ],
           "4x10G[1G]": [
               "Eth18/1(Port18)",
               "Eth18/2(Port14)",
               "Eth18/3(Port13)",
               "Eth18/4(Port15)"
           ]
       },
       "interface_ids": "17,13,12,14",
       "default_brkout_mode": "4x25G",
       "autoneg": "off",
       "Current Breakout Mode": "4x25G",
       "child ports": "Ethernet12,Ethernet13,Ethernet14,Ethernet17",
       "child port speeds": "25G,25G,25G,25G"
   },
<...>

admin@NSK-BR01-1:~$ sudo config interface breakout Ethernet17 '4x10G[1G]'
OR
admin@NSK-BR01-1:~$ sudo vi /etc/sonic/config_db.json

<...>
"BREAKOUT_CFG": {
<...>
 "Ethernet17": {
  "brkout_mode": "4x10G[1G]"
},
<...>
<...>

admin@NSK-BR01-1:~$ sudo config load

admin@NSK-BR01-1:~$ sudo config interface speed Ethernet13 1000

admin@NSK-BR01-1:~$ show interface status Ethernet13
 Interface    Lanes    Speed    MTU    Oper FEC            Alias    Vlan    Oper    Admin    ProtoDown    Eff Admin            Type    Asym PFC
-----------  -------  -------  -----  ----------  ---------------  ------  ------  -------  -----------  -----------  --------------  ----------
Ethernet13       22       1G   9100        none  Eth18/2(Port14)  routed      up       up        False           up  SFP/SFP+/SFP28         N/A