8325#configure terminal
8325(config)# system interface-group ?
  1  Interfaces 1/1/1-1/1/12
  2  Interfaces 1/1/13-1/1/24
  3  Interfaces 1/1/25-1/1/36
  4  Interfaces 1/1/37-1/1/48
8325(config)# system interface-group 1 speed ？
  10g  Allow up to 10Gbps transceivers only
  25g  Allow 25Gbps transceivers only （default)
8325(config)# system interface-group 1 speed 10g
Changing the group speed will disable all membe rinterfaces that do not match the new speed.

Continue (y/n)? y
8325(config)#
8325# show system interface-group
---------------------------------------------------
Group  Speed  Member    Ports   Mismatched Ports
---------------------------------------------------
1      10g    1/1/1-1/1/12
2      25g    1/1/13-1/1/24     1/1/15
3      25g    1/1/25-1/1/36
4      25g    1/1/37-1/1/48