Internet traffic too slow when mwan3 is active

Les · January 2, 2023, 7:50pm

Hello all,

First of all, sorry for my English.
I've been running around with a problem for a while.

My router is a TP-Link Archer C7 v5. I have two internet providers, with 300Mb each.

When mwan3 is NOT active, speedtest gives me a correct speed of 300Mb, but when mwan3 is active, the speed is almost halved (150Mb).

I really don't know what else to check, I'm suspecting that the problem is the CPU of the TP-Link router.

I appreciate if someone helps me to find the problem.

Here is my /etc/config/network:

config interface 'loopback'
	option ifname 'lo'
	option proto 'static'
	option ipaddr '127.0.0.1'
	option netmask '255.0.0.0'

config globals 'globals'
	option ula_prefix 'fd17:fa92:082d::/48'

config interface 'lan'
	option type 'bridge'
	option ifname 'eth0.1'
	option proto 'static'
	option netmask '255.255.255.0'
	option ip6assign '60'
	option ipaddr '10.29.22.1'

config interface 'wan'
	option ifname 'eth0.2'
	option proto 'dhcp'
	option mtu '1452'
	option metric '10'

config device 'wan_eth0_2_dev'
	option name 'eth0.2'
	option macaddr '68:ff:7b:c7:37:b6'

config switch
	option name 'switch0'
	option reset '1'
	option enable_vlan '1'

config switch_vlan
	option device 'switch0'
	option vlan '1'
	option vid '1'
	option ports '0t 3 4 5'

config switch_vlan
	option device 'switch0'
	option vlan '2'
	option ports '0t 1'
	option vid '2'

config interface 'roada'
	option ifname 'tun2'
	option proto 'none'

config switch_vlan
	option device 'switch0'
	option vlan '3'
	option ports '0t 2'
	option vid '3'

config interface 'wanb'
	option ifname 'eth0.3'
	option proto 'dhcp'
	option mtu '1452'
	option metric '20

'

And my /etc/config/mwan3 configuration:

config globals 'globals'
	option mmx_mask '0x3F00'
	option rtmon_interval '5'
	list rt_table_lookup '1'
	list rt_table_lookup '2'

config interface 'wan'
	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 interval '5'
	option down '3'
	option up '8'
	option initial_state 'online'
	option track_method 'ping'
	option size '56'
	option max_ttl '60'
	option check_quality '0'
	option failure_interval '5'
	option recovery_interval '5'
	option enabled '1'

config interface 'wanb'
	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 '1'
	option count '1'
	option timeout '2'
	option interval '5'
	option down '3'
	option up '8'
	option initial_state 'online'
	option track_method 'ping'
	option size '56'
	option max_ttl '60'
	option check_quality '0'
	option failure_interval '5'
	option recovery_interval '5'
	option enabled '1'

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 interface 'wanb'
	option metric '1'
	option weight '2'

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

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 'balanced'
	list use_member 'wan_m1_w3'
	list use_member 'wanb_m1_w2'
	list use_member 'wan6_m1_w3'
	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 rule 'default_rule_v4'
	option dest_ip '0.0.0.0/0'
	option family 'ipv4'
	option proto 'all'
	option sticky '0'
	option use_policy 'wan_wanb'

I will be very grateful if you can help me.

Thanks in advance.

Leandro

trendy · January 3, 2023, 8:23am

Start by cleaning the mwan3 configuration from invalid entries, for example balanced policy has members wan6_m1_w3 and wanb6_m1_w2 which do not exist.

Les · January 3, 2023, 10:19am

Hello there!,
Already try that, and still the same problem.
Just a curiosity, even if I disable mwan3 the internet speed doesn't reach 300Mb. I need to completely uninstall it to get it running at the correct speed again.

config globals 'globals'
	option mmx_mask '0x3F00'
	option rtmon_interval '5'
	list rt_table_lookup '1'
	list rt_table_lookup '2'

config interface 'wan'
	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 interval '5'
	option down '3'
	option up '8'
	option initial_state 'online'
	option track_method 'ping'
	option size '56'
	option max_ttl '60'
	option check_quality '0'
	option failure_interval '5'
	option recovery_interval '5'
	option enabled '1'

config interface 'wanb'
	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 '1'
	option count '1'
	option timeout '2'
	option interval '5'
	option down '3'
	option up '8'
	option initial_state 'online'
	option track_method 'ping'
	option size '56'
	option max_ttl '60'
	option check_quality '0'
	option failure_interval '5'
	option recovery_interval '5'
	option enabled '1'

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 interface 'wanb'
	option metric '1'
	option weight '2'

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

config policy 'wan_only'
	list use_member 'wan_m1_w3'
	option last_resort 'unreachable'

config policy 'wanb_only'
	list use_member 'wanb_m1_w2'
	option last_resort 'unreachable'

config policy 'balanced'
	list use_member 'wan_m1_w3'
	list use_member 'wanb_m1_w2'
	option last_resort 'unreachable'

config policy 'wan_wanb'
	list use_member 'wan_m1_w3'
	list use_member 'wanb_m2_w2'
	option last_resort 'unreachable'

config policy 'wanb_wan'
	list use_member 'wan_m2_w3'
	list use_member 'wanb_m1_w2'
	option last_resort 'unreachable'

config rule 'default_rule_v4'
	option dest_ip '0.0.0.0/0'
	option family 'ipv4'
	option proto 'all'
	option sticky '0'
	option use_policy 'wan_wanb'

trendy · January 3, 2023, 10:35am

When you run the speedtest, do you see high cpu utilization in top or htop ? Is it different than running the test without mwan3?

StanL · February 28, 2023, 8:00pm

You didn't post firewall details, but make sure wana and wanb are both on the same zone.

config zone
        option name 'wan'
        option input 'REJECT'
        option output 'ACCEPT'
        option forward 'REJECT'
        option masq '1'
        option mtu_fix '1'
        list network 'wan'
        list network 'wanb'