Configuring RTG on two EX2300-C

Hello,

I want to configure RTG on two EX2300-C.

The switches are connected with 10G fiber (SFP+) (xe-0/1/0) and 1G copper (ge-0/0/11).

The 10G fiber cable should be primary, the copper cable secondary mode.

Will the copper cable (1G) reduce the speed of the fiber (10G) to also 1G?

I found this documents:

https://www.juniper.net/techpubs/en_US/junos13.2/topics/concept/cfm-redundant-trunk-groups-understanding.html

https://www.juniper.net/techpubs/en_US/junos/topics/example/cfm-ex-series-redundant-trunk-groups.html

They only show example configuration for three switches.

So my question is:

Do I need to configure the following commands on both of the switches or only on one switch?

set protocols rstp disable
set ethernet-switching-options redundant-trunk-group group example1 interface xe-0/1/0.0 primary
set ethernet-switching-options redundant-trunk-group group example1 interface ge-0/0/11.0
set redundant-trunk-group group example1 preempt-cutover-timer 60

Does RTG also work when one VLAN is configured as IRB management interface?

I hope that somebody could help me.

Thanks and kind regards

gp83.