Removing ports from a static trunk group
CAUTION:
Removing a port from a trunk can create a loop and cause a broadcast storm. When you remove a port from a trunk where spanning tree is not in use, The switch recommends that you first disable the port or disconnect the link on that port.
Syntax:
no trunk <port-list>Removes the specified ports from an existing trunk group.
Example:
To remove ports C4 and C5 from an existing trunk group:
switch(config)# no trunk c4-c5