nexthop.go

package main

import (
	"fmt"
	"net"

	"github.com/vishvananda/netlink"
)

func main() {
	nexthops := []*netlink.NexthopInfo{}

	for i := 1; i < 254; i++ {
		nexthops = append(nexthops, &netlink.NexthopInfo{
			Gw: net.ParseIP(fmt.Sprintf("172.18.0.%d", i)),
		})
	}

	_, ipNet, _ := net.ParseCIDR("20.0.0.1/32")
	route := &netlink.Route{
		Dst:       ipNet,
		MultiPath: nexthops,
		Family:    netlink.FAMILY_V4,
		Table:     2500,
	}

	err := netlink.RouteReplace(route)
	fmt.Println(err)

	routeList, err := netlink.RouteListFiltered(netlink.FAMILY_ALL, &netlink.Route{Table: 2500}, netlink.RT_FILTER_TABLE)
	if err != nil {
		fmt.Println(err)
		return
	}
	fmt.Println(routeList)
}