To change the relative route priority, use the following command:
configure iproute {ipv4} priority [auto-peering | blackhole | bootp | ebgp |host-mobility | ibgp | icmp | isis | isis-level-1 | isis-level-1-external | isis-level-2 | isis-level-2-external | mpls | ospf-as-external | ospf-extern1 | ospf-extern2 | ospf-inter | ospf-intra | rip | static] priority {vr vrname}