**switch A  for to port QSFP 49-50**

  >system - view
  ]int f1/0/49 
  ]shutdown
  ]int f1/0/50
  ]shutdown
  ]irf-port 1/1
  ]port group interface FortyGigE1/0/49
  ]port group interface FortyGigE1/0/50
  ]int f1/0/49
  ]undo shutdown
  ]int f1/0/50
  ]undo shutdown
  ]irf-port-configuration active
  ]irf auto-update enable

**Switch B**

  >system - view
  ] irf member 1 renumber 2
  ] quit 
  > reboot
  >system - view
  ]int f2/0/49 
  ]shutdown
  ]int f2/0/50
  ]shutdown
  ]irf-port 2/2
  ]port group interface FortyGigE2/0/49
  ]port group interface FortyGigE2/0/50
  ]int f2/0/49
  ]undo shutdown
  ]int f2/0/50
  ]undo shutdown
  ]irf-port-configuration active
  ]irf auto-update enable
  

**Switch A for to port QSFP 51-52**

  >system - view
  ]int f1/0/51 
  ]shutdown
  ]int f1/0/52
  ]shutdown
  ]irf-port 1/2
  ]port group interface FortyGigE1/0/51
  ]port group interface FortyGigE1/0/52
  ]int f1/0/51
  ]undo shutdown
  ]int f1/0/52
  ]undo shutdown
  ]irf-port-configuration active
  ]irf auto-update enable
   
**Switch B**

  >system - view
  ] irf member 1 renumber 2
  ] quit 
  > reboot
  >system - view
  ]int f2/0/51 
  ]shutdown
  ]int f2/0/52
  ]shutdown
  ]irf-port 2/1
  ]port group interface FortyGigE2/0/51
  ]port group interface FortyGigE2/0/52
  ]int f2/0/51
  ]undo shutdown
  ]int f2/0/52
  ]undo shutdown
  ]irf-port-configuration active
  ]irf auto-update enable