spanning-tree mode rapid-pvst in c9300

[Leftz]

hi we have two group of spanning-tree command. Can we say once we use group 2, we do not need to use group 1? Thanks

1. spanning-tree portfast
    spanning-tree bpduguard enable

2. spanning-tree mode rapid-pvst

[MHM Cisco World]

there are no any relation between two group, 
first in STP you must config the MODE 
1- PVST or R-PVST
2- MST
3- IEEE (STP)
4- RSTP 

then for port connect to Host you can use 
portfast + BPDUguard 

[Leftz]

no, group 2 rapid-pvst include port fast

[MHM Cisco World]

you confuse again, 
rapid-PVST is called rapid because of it merge two stp phase (learn and listen) in one phase learn.

Portfast is bypass learn of rstp 

Or

Bypass learn and listen of stp.

In both mode you can use portfast.

[Leftz]

i am talking about function. so that when we use rapid-PVST, we do not need to config portfast. 

[MHM Cisco World]

No you still need it for port connect to host.