The forbidden mode does not register or declare VLANs. You can change the registration mode of a

specific interface to forbidden. An interface in forbidden registration mode does not participate in

MVRP even if MVRP is enabled on the switch.

https://www.juniper.net/documentation/us/en/software/junos/multicast-l2/topics/topicmap/mvrp.html

MVRP is disabled by default on the switches and, when enabled, affects only trunk interfaces. Once

you enable MVRP, all VLAN interfaces on the switch belong to MVRP (the default normal registration

mode) and those interfaces accept PDU messages and send their own PDU messages. forbidden—

The interface does not register or declare VLANS (except statically configured VLANs).

https://www.juniper.net/documentation/us/en/software/junos/useraccess/topics/concept/dynamic-vlan-assignment-colorless-ports.html

For specifying the BGP community attribute only, you also can specify community-ids as one of the

following well-known community names defined in RFC 1997:

no-advertise—Routes containing this community name are not advertised to other BGP peers.

no-export—Routes containing this community name are not advertised outside a BGP confederation

boundary.

no-export-subconfed—Routes containing this community are advertised to IBGP peers with the same

AS number, but not to members of other confederations.

llgr-stale—Adds a community to a long-lived stale route when it is readvertised.

no-llgr—Marks routes which a BGP speaker does not want to be retained by LLGR. The Notification

message feature does not have any associated configuration parameters.

https://www.juniper.net/documentation/us/en/software/junos/bgp/topics/ref/statement/communit

y-edit-routing-options.html

internet Group Management Protocol (IGMP) and Multicast Listener Discovery (MLD) are the

Multicast Group Membership Discovery (MGMD) protocols