Resilient Hashing is available for default VRF as well as user created VRFs. To configure Resilient Hashing on default VRF:
conf term command.
                
                SLX# conf term SLX(config)#
resilient-hash command to configure.  
                
                SLX (config)# resilient-hash ?
Possible completions:
    ecmp        Resilient hash ECMP
    max-path    Resilient hash max path (8|16|64)
SLX (config)# resilient-hash ecmp ?
Possible completions:
    enable      Enable resilient hash ECMP
SLX (config)# resilient-hash ecmp enable
                max-path value.   
                
                
                    The default max-path  value is 8. You can choose to use 8, 16, or 64 paths.
                    
SLX (config)# resilient-hash ?
Possible completions:
    ecmp        Resilient hash ECMP
    max-path    Resilient hash max path (8|16|64)
SLX (config)# resilient-hash max-path 8
SLX (config)#
                show ip route system-summary command.   
                
                SLX # show ip route system-summary
System Route Count: 10 Max routes: 358400 (Route limit not exceeded)
System Nexthop Count: 2 Max nexthops: 4000 (Nexthop limit not exceeded)
One Path Nexthop Count: 1 Max One Path Nexthops: 48000
RH Flowset Entries: 2816 Max 32768 (Flowset limit not exceeded)
VRF-Name: default-vrf
    Route count: 0 Max routes: Not Set (Route limit not exceeded)
    0 connected, 0 static, 0 OSPF, 0 BGP, 0 ISIS, 0 unnumbered, 0 EVPN Host
    Resilient Hashing (Flowset Sz: 128, Max RH Paths: 8, RH Nexthops: 12)
    
VRF-Name: mgmt-vrf
    Route count: 3 Max routes: Not Set (Route limit not exceeded)
    1 connected, 1 static, 0 OSPF, 0 BGP, 0 ISIS, 0 unnumbered, 0 EVPN Host
VRF-Name: vrf2
    Route count: 7 Max routes: Not Set (Route limit not exceeded)
    2 connected, 2 static, 0 OSPF, 1 BGP, 0 ISIS, 0 unnumbered, 0 EVPN Host
    Resilient Hashing (Flowset Sz: 128, Max RH Paths: 16, RH Nexthops: 10)
VRF-Name: vrf3
    Route count: 7 Max routes: Not Set (Route limit not exceeded)
    2 connected, 2 static, 0 OSPF, 1 BGP, 0 ISIS, 0 unnumbered, 0 EVPN Host
SLX #