Define a Group with Dynamic Peers

To define a BGP group in which the local system's peers are dynamic and change over time, include the allow statement at the [edit protocols bgp group group-name] hierarchy level (for routing instances, include the statements at the [edit routing-instances routing-instance-name protocols bgp group group-name] hierarchy level). To recognize all BGP systems as peers, include the allow all statement. To recognize BGP systems within specified address ranges, specify a set of addresses in the allow network/mask-length statement. These addresses can be IPv6 or IPv4 addresses.

[edit protocols bgp]

group group-name { 

    peer-as autonomous-system;

    type type;

    (allow [ network/mask-length... ] | allow all); 

}