this feature , allows to give the capability bgp label-unicast to set the multipath :
```
vyos@vyos# set protocols bgp address-family ipv4-labeled-unicast
Possible completions:
+> aggregate-address BGP aggregate network/prefix
+> network Import BGP network/prefix into labeled unicast IPv4 RIB
```
example on FRR :
```
address-family ipv4 labeled-unicast
maximum-paths 4
maximum-paths ibgp 4
```