Your company makes extensive use of VSTP in your network for loop protection. The network is at
the VSTP VLAN limit and must protect additional VLANs.
Which command allows you to protect additional VLANs?
A.
set protocols mstp interface all
B.
set protocols vstp vlan all
C.
set protocols vstp vlan-group
D.
set protocols rstp
http://www.juniper.net/documentation/en_US/junos11.4/topics/reference/configuration-statement/vstp-edit-protocols-spanning-trees-ex-series-vstp.html
To ensure all VLANs are running a spanning-tree protocol, run RSTP for networks with large numbers of VLANs .
Best Practice: Configure RSTP when you configure VSTP. RSTP overhead is minimal and this configuration ensures that a spanning-tree protocol is running on all VLANs on your switch, even when your switch is supporting more than the maximum number of allowed VSTP VLANs.