MRS36-20做双PPPOE拨号如何做负载均衡

路由器上创建 Dialer 1绑定G0，创建 Dialer 2绑定G1，G2配置的内网IP地址，内网未划分虚网。

配置默认路由Dialer 1和Dialer 2.

实际情况只能使用其中一条，另一条闲置。

想让路由器来判断两条外网线路的负载情况从而选择负担较轻的线路发送内网过来的数据包访问外网？

求具体配置命令行？

H3C Comware Software, Version 7.1.064, Release 0605P13

Copyright (c) 2004-2017 New H3C Technologies Co., Ltd. All rights reserved.

H3C MSR36-20 uptime is 0 weeks, 0 days, 7 hours, 37 minutes

Last reboot reason : Power on

Boot image: cfa0:/msr36-cmw710-boot-r0605p13.bin

Boot image version: 7.1.064P39, Release 0605P13

  Compiled May 15 2017 16:00:00

System image: cfa0:/msr36-cmw710-system-r0605p13.bin

System image version: 7.1.064, Release 0605P13

  Compiled May 15 2017 16:00:00

CPU ID: 0x2

2G bytes DDR3 SDRAM Memory

8M bytes Flash Memory

PCB               Version:  2.0

CPLD              Version:  3.0

Basic    BootWare Version:  1.70

Extended BootWare Version:  1.70