This value names the route-map that defines the policy-based routing rules applied to a given interface's IPv4 traffic, per the source description "RouteMap name", as the writable column of a table indexed by interface name. A network administrator sets this to attach a previously defined route-map (matching traffic and specifying alternate next-hops) to a specific interface, overriding normal destination-based IPv4 routing for matched traffic. For example, setting zxr10PbrIPv4RouteMapName to "pbr-voip" on an interface applies that route-map's policy rules to IPv4 traffic arriving on that interface.