Td-wr1043 wan interface can't ping, mwan3 conf

Installing and Using OpenWrt Network and Wireless Configuration
3

in the forums, i found a topic about mwan3 saying that the router should be able to ping out by specifying the uci network name. this is the topic:

i didn't undertand the last part of your question, so here you have the mwan3 config file

this is my mwan3 config.

root@Gargoyle:/etc/config# cat mwan3

config policy 'balanced'
        list use_member 'wan_m1_w3'
        list use_member 'wanb_m1_w2'
        list use_member 'wanb_m1_w2'
        list use_member 'wanb_m2_w2'
        option last_resort 'default'

config policy 'wan_only'
        list use_member 'wan_m1_w3'
        list use_member 'wan6_m1_w3'

config policy 'wanb_only'
        list use_member 'wanb_m1_w2'
        list use_member 'wanb6_m1_w2'

config policy 'wan_wanb'
        list use_member 'wan_m1_w3'
        list use_member 'wanb_m2_w2'
        list use_member 'wan6_m1_w3'
        list use_member 'wanb6_m2_w2'

config policy 'wanb_wan'
        list use_member 'wan_m2_w3'
        list use_member 'wanb_m1_w2'
        list use_member 'wan6_m2_w3'
        list use_member 'wanb6_m1_w2'

config globals 'globals'
        option mmx_mask '0x3F00'
        option local_source 'lan'

config interface 'wan'
        option enabled '1'
        list track_ip '8.8.4.4'
        list track_ip '8.8.8.8'
        list track_ip '208.67.222.222'
        list track_ip '208.67.220.220'
        option family 'ipv4'
        option reliability '2'
        option count '1'
        option timeout '2'
        option failure_latency '1000'
        option recovery_latency '500'
        option failure_loss '20'
        option recovery_loss '5'
        option interval '5'
        option down '3'
        option up '8'

config member 'wan_m1_w3'
        option interface 'wan'
        option metric '1'
        option weight '3'

config member 'wan_m2_w3'
        option interface 'wan'
        option metric '2'
        option weight '3'

config member 'wanb_m1_w2'
        option metric '1'
        option weight '2'
        option interface 'WAN2'

config member 'wanb_m2_w2'
        option metric '2'
        option weight '2'
        option interface 'WAN2'

config rule 'https'
        option sticky '1'
        option dest_port '443'
        option proto 'tcp'
        option use_policy 'balanced'

config rule 'default_rule'
        option dest_ip '0.0.0.0/0'
        option use_policy 'balanced'

config interface 'WAN2'
        option initial_state 'online'
        option family 'ipv4'
        list track_ip '8.8.8.8'
        list track_ip '192.168.1.1'
        option track_method 'ping'
        option reliability '1'
        option count '1'
        option size '56'
        option check_quality '0'
        option timeout '2'
        option interval '3'
        option failure_interval '5'
        option recovery_interval '5'
        option down '3'
        option up '3'
        option flush_conntrack 'never'
        option enabled '1'

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