Assuming that flow control is currently disabled on the switch, you would use these commands:
Figure 5: Configuring flow control for a series of ports
switch(config)# int a1-a6 flow-control
switch(config)# show interfaces brief
Status and Counters - Port Status
| Intrusion MDI Flow Bcast
Port Type | Alert Enabled Status Mode Mode Ctrl Limit
------ --------- + --------- ------- ------ ---------- ---- ---- -----
A1 10GbE-T | No Yes Up 1000FDx NA on 0
A2 10GbE-T | No Yes Up 10GigFD NA on 0
A3 10GbE-T | No Yes Up 10GigFD NA on 0
A4 10GbE-T | No Yes Up 10GigFD NA on 0
A5 10GbE-T | No Yes Up 10GigFD NA on 0
A6 10GbE-T | No Yes Up 10GigFD NA on 0
A7 10GbE-T | No Yes Down 10GigFD NA off 0
A8 10GbE-T | No Yes Up 10GigFD NA off 0
switch(config)# no int a5-a6 flow-control
switch(config)# show interfaces brief
Status and Counters - Port Status
| Intrusion MDI Flow Bcast
Port Type | Alert Enabled Status Mode Mode Ctrl Limit
------ --------- + --------- ------- ------ ---------- ---- ---- -----
A1 10GbE-T | No Yes Up 1000FDx NA on 0
A2 10GbE-T | No Yes Down 10GigFD NA on 0
A3 10GbE-T | No Yes Down 10GigFD NA on 0
A4 10GbE-T | No Yes Down 10GigFD NA on 0
A5 10GbE-T | No Yes Down 10GigFD NA off 0
A6 10GbE-T | No Yes Down 10GigFD NA off 0
A7 10GbE-T | No Yes Down 10GigFD NA off 0
A8 10GbE-T | No Yes Down 10GigFD NA off 0
switch(config)# no int a1-a4 flow-control
switch(config)# show interfaces brief
Status and Counters - Port Status
| Intrusion MDI Flow Bcast
Port Type | Alert Enabled Status Mode Mode Ctrl Limit
------ --------- + --------- ------- ------ ---------- ---- ---- -----
A1 10GbE-T | No Yes Down 1000FDx NA off 0
A2 10GbE-T | No Yes Down 10GigFD NA off 0
A3 10GbE-T | No Yes Down 10GigFD NA off 0
A4 10GbE-T | No Yes Down 10GigFD NA off 0
A5 10GbE-T | No Yes Down 10GigFD NA off 0
A6 10GbE-T | No Yes Down 10GigFD NA off 0
A7 10GbE-T | No Yes Down 10GigFD NA off 0
A8 10GbE-T | No Yes Down 10GigFD NA off 0
Chapter 3 Port Status and Configuration 79