场景说明：CE1与CE2组成M-LAG，并且作为VLAN 10的网关

CE1&CE2配置：

CE1&CE2:
vlan 10
stp mode rstp
stp v-stp enable  //开启V-STP，目的是让两台M-LAG的设备虚拟成一个STP设备进行生成树计算
stp bridge-address 0000-0000-0001  //由于设备需要参与生成树计算，需要配置一样的桥MAC，建议采用M-LAG主设备的MAC作为桥MAC
#
ip vpn-instance DAD_MLAG
 ipv4-family
 route-distinguisher 1:1
#
int 10ge 1/0/2
 undo portswtich
 ip bind vpn-instance DAD_MLAG
 ip addr 1.1.1.1 30
 m-lag unpaired-port reserved  //由于Peer-link故障后，会阻err-down备机的端口，该命令作用为Peer-link故障后，DAD链路正常的情况不会err-down该端口
#
dfs-group 1
 priority 150
 source ip 1.1.1.1 vpn-instance DAD_MLAG peer 1.1.1.2
 dual-active detection enhanced enable  //配置二次故障增强功能，当Peer-link故障后，备机会err-down接口，如此时主设备故障，将导致流量转发异常，当备感知到主故障后，会回复err-down端口保证流量正常转发
#
int eth-trunk 0
 trunkport 10ge 1/0/0
 trunkport 10ge 1/0/1
 mode lacp-static
 peer-link 1
 port vlan exclude 1
#
int eth-trunk 11
 mode lacp-static
 trunkport 10ge 1/0/3
 port link-type trunk
 port trunk allow-pass vlan 10
 undo port trunk allow-pass vlan 1
 dfs-group 1 m-lag 11
#
int vlanif 10
 ip addr 192.168.10.254 24
 mac-address 0000-5e00-0010  //两台CE配置一样的MAC地址