Trouble getting this QMI modem to work on MR200

Installing and Using OpenWrt
1

I installed OpenWRT 24 on a MR200v5, a simple TP-link with build in 4G, for use in my small campervan. I used the official distro, and it all almost seems to work, but not quite

Using the uqmi command, I see it connects, and even gets an IP from the provider, but it is not passing through the IP to the OpenWRT interface.

uqmi output (note the CG-NAT IP details)

root@OpenWrt:~# cat /sys/kernel/debug/usb/devices

T:  Bus=01 Lev=00 Prnt=00 Port=00 Cnt=00 Dev#=  1 Spd=480  MxCh= 1
B:  Alloc=  0/800 us ( 0%), #Int=  0, #Iso=  0
D:  Ver= 2.00 Cls=09(hub  ) Sub=00 Prot=00 MxPS=64 #Cfgs=  1
P:  Vendor=1d6b ProdID=0002 Rev= 6.06
S:  Manufacturer=Linux 6.6.86 ehci_hcd
S:  Product=EHCI Host Controller
S:  SerialNumber=101c0000.ehci
C:* #Ifs= 1 Cfg#= 1 Atr=e0 MxPwr=  0mA
I:* If#= 0 Alt= 0 #EPs= 1 Cls=09(hub  ) Sub=00 Prot=00 Driver=hub
E:  Ad=81(I) Atr=03(Int.) MxPS=   4 Ivl=256ms

T:  Bus=01 Lev=01 Prnt=01 Port=00 Cnt=01 Dev#=  2 Spd=480  MxCh= 0
D:  Ver= 2.00 Cls=00(>ifc ) Sub=00 Prot=00 MxPS=64 #Cfgs=  1
P:  Vendor=05c6 ProdID=9025 Rev= 3.18
S:  Manufacturer=Android
S:  Product=Android
S:  SerialNumber=9bd61336
C:* #Ifs= 6 Cfg#= 1 Atr=a0 MxPwr=500mA
I:* If#= 0 Alt= 0 #EPs= 2 Cls=ff(vend.) Sub=ff Prot=ff Driver=(none)
E:  Ad=81(I) Atr=02(Bulk) MxPS= 512 Ivl=0ms
E:  Ad=01(O) Atr=02(Bulk) MxPS= 512 Ivl=0ms
I:* If#= 1 Alt= 0 #EPs= 2 Cls=ff(vend.) Sub=42 Prot=01 Driver=(none)
E:  Ad=02(O) Atr=02(Bulk) MxPS= 512 Ivl=0ms
E:  Ad=82(I) Atr=02(Bulk) MxPS= 512 Ivl=0ms
I:* If#= 2 Alt= 0 #EPs= 3 Cls=ff(vend.) Sub=00 Prot=00 Driver=(none)
E:  Ad=84(I) Atr=03(Int.) MxPS=  10 Ivl=32ms
E:  Ad=83(I) Atr=02(Bulk) MxPS= 512 Ivl=0ms
E:  Ad=03(O) Atr=02(Bulk) MxPS= 512 Ivl=0ms
I:* If#= 3 Alt= 0 #EPs= 3 Cls=ff(vend.) Sub=00 Prot=00 Driver=(none)
E:  Ad=86(I) Atr=03(Int.) MxPS=  10 Ivl=32ms
E:  Ad=85(I) Atr=02(Bulk) MxPS= 512 Ivl=0ms
E:  Ad=04(O) Atr=02(Bulk) MxPS= 512 Ivl=0ms
I:* If#= 4 Alt= 0 #EPs= 3 Cls=ff(vend.) Sub=ff Prot=ff Driver=qmi_wwan
E:  Ad=88(I) Atr=03(Int.) MxPS=   8 Ivl=32ms
E:  Ad=87(I) Atr=02(Bulk) MxPS= 512 Ivl=0ms
E:  Ad=05(O) Atr=02(Bulk) MxPS= 512 Ivl=0ms
I:* If#= 5 Alt= 0 #EPs= 2 Cls=08(stor.) Sub=06 Prot=50 Driver=(none)
E:  Ad=89(I) Atr=02(Bulk) MxPS= 512 Ivl=0ms
E:  Ad=06(O) Atr=02(Bulk) MxPS= 512 Ivl=125us
root@OpenWrt:~# uqmi -d /dev/cdc-wdm0 --get-profile-settings 3gpp,1
{
        "apn": "internet",
        "pdp-type": "ipv4",
        "username": "",
        "password": "",
        "auth": "none",
        "no-roaming": false,
        "apn-disabled": false
}
root@OpenWrt:~# uqmi -d /dev/cdc-wdm0 --get-serving-system
{
        "registration": "registered",
        "radio_interface": [
                "lte"
        ],
        "plmn_mcc": 204,
        "plmn_mnc": 16,
        "plmn_description": "Or▒▒\u0006",
        "roaming": true
}
root@OpenWrt:~# uqmi -d /dev/cdc-wdm0 --get-current-settings
{
        "pdp-type": "ipv4",
        "ip-family": "ipv4",
        "mtu": 1500,
        "ipv4": {
                "ip": "10.195.7.33",
                "dns1": "212.2.127.254",
                "dns2": "212.2.96.52",
                "gateway": "10.195.7.34",
                "subnet": "255.255.255.252"
        },
        "ipv6": {

        },
        "domain-names": {

        }
}
root@OpenWrt:~#

OpenWRT interfaces Luci
Note how the virtual interface is not getting the DHCP
Also note the wwan24 interface is a temp wifi client to my home internet, so I can download packages and such.

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image955×536 31.8 KB

ifconfig

root@OpenWrt:~# ifconfig
br-lan    Link encap:Ethernet  HWaddr 00:5F:67:51:B6:A5
          inet addr:192.168.1.1  Bcast:192.168.1.255  Mask:255.255.255.0
          inet6 addr: fe80::25f:67ff:fe51:b6a5/64 Scope:Link
          inet6 addr: fd20:f998:e527::1/60 Scope:Global
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:16390 errors:0 dropped:0 overruns:0 frame:0
          TX packets:16477 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:1454021 (1.3 MiB)  TX bytes:30037832 (28.6 MiB)

eth0      Link encap:Ethernet  HWaddr 00:5F:67:51:B6:A5
          inet6 addr: fe80::25f:67ff:fe51:b6a5/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:16575 errors:0 dropped:0 overruns:0 frame:0
          TX packets:26387 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:1768339 (1.6 MiB)  TX bytes:30678216 (29.2 MiB)
          Interrupt:5

eth0.1    Link encap:Ethernet  HWaddr 00:5F:67:51:B6:A5
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:16390 errors:0 dropped:0 overruns:0 frame:0
          TX packets:26372 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:1454021 (1.3 MiB)  TX bytes:30570702 (29.1 MiB)

lo        Link encap:Local Loopback
          inet addr:127.0.0.1  Mask:255.0.0.0
          inet6 addr: ::1/128 Scope:Host
          UP LOOPBACK RUNNING  MTU:65536  Metric:1
          RX packets:1820 errors:0 dropped:0 overruns:0 frame:0
          TX packets:1820 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:149802 (146.2 KiB)  TX bytes:149802 (146.2 KiB)

phy1-ap0  Link encap:Ethernet  HWaddr 00:5F:67:51:B6:A4
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:518 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:0 (0.0 B)  TX bytes:84405 (82.4 KiB)

wwan0     Link encap:UNSPEC  HWaddr 00-00-00-00-00-00-00-00-00-00-00-00-00-00-00-00
          inet6 addr: fe80::8479:f18b:e04:f82d/64 Scope:Link
          UP POINTOPOINT RUNNING NOARP MULTICAST  MTU:1500  Metric:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:383 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:0 (0.0 B)  TX bytes:123768 (120.8 KiB)

wwan24    Link encap:Ethernet  HWaddr 00:5F:67:51:B6:A5
          inet addr:192.168.19.166  Bcast:192.168.19.255  Mask:255.255.255.0
          inet6 addr: fe80::25f:67ff:fe51:b6a5/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:3935 errors:0 dropped:0 overruns:0 frame:0
          TX packets:749 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:2111783 (2.0 MiB)  TX bytes:81716 (79.8 KiB)

root@OpenWrt:~#

/etc/config/network

root@OpenWrt:~# cat /etc/config/network

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

config globals 'globals'
        option ula_prefix 'fd20:f998:e527::/48'
        option packet_steering '1'

config device
        option name 'br-lan'
        option type 'bridge'
        list ports 'eth0.1'

config interface 'lan'
        option device 'br-lan'
        option proto 'static'
        option ipaddr '192.168.1.1'
        option netmask '255.255.255.0'
        option ip6assign '60'

config interface 'wan'
        option device '/dev/cdc-wdm0'
        option proto 'qmi'
        option pdptype 'ipv4'
        option apn 'internet'
        option auth 'none'

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

config switch_vlan
        option device 'switch0'
        option vlan '1'
        option ports '0 1 2 3 6t'

config interface 'wwan24'
        option proto 'dhcp'

root@OpenWrt:~#
2

Don't use DHCP with QMI, see https://openwrt.org/toh/tp-link/tl-mr6400_v5#modem_configuration

1 Like
3

@AndrewZ = Hero

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image965×406 24 KB

1 Like
4

@AndrewZ

So the IP now is assigned, but not the gateway and dns. If I add them myself, internet works, but do you also happen to know how to do that? (I will read the entire MR6400 page, but am asking anyway, just in case)

Edit: I guess I can do a uqmi -d /dev/cdc-wdm0 --get-current-settings and parse it for the gateway. And just hardcode 8.8.1.1 for DNS.
But it really would be nice if it worked without custom scripts

5

If DNS server address is not assigned automatically for whatever reason, you can add it in the interface configuration.
Most of the time gateway IP address is not needed as your wwan0 interface is in fact the gateway.
Remove your customizations, restart the interface and show the output of ip r and also ifstatus wan

1 Like
6

Again, you are correct.
While they did not show up at first, a full reboot went straight to the right gateway and dns:

Possibly additional info is that I had also disabled the WiFi client WAN interface, so maybe that messed with the DNS and gateway. The full reboot was with the WiFi client set to "do not bring up at boot" and "disabled"

PS: I am not worried about showing IP's below, as they are CG-NAT and not public.

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root@OpenWrt:~# ifstatus wan
{
        "up": true,
        "pending": false,
        "available": true,
        "autostart": true,
        "dynamic": false,
        "uptime": 388,
        "l3_device": "wwan0",
        "proto": "qmi",
        "updated": [
                "addresses",
                "routes",
                "data"
        ],
        "metric": 0,
        "dns_metric": 0,
        "delegation": true,
        "ipv4-address": [
                {
                        "address": "10.196.83.65",
                        "mask": 30
                }
        ],
        "ipv6-address": [

        ],
        "ipv6-prefix": [

        ],
        "ipv6-prefix-assignment": [

        ],
        "route": [
                {
                        "target": "0.0.0.0",
                        "mask": 0,
                        "nexthop": "10.196.83.66",
                        "source": "0.0.0.0/0"
                }
        ],
        "dns-server": [
                "212.2.127.254",
                "212.2.96.52"
        ],
        "dns-search": [

        ],
        "neighbors": [

        ],
        "inactive": {
                "ipv4-address": [

                ],
                "ipv6-address": [

                ],
                "route": [

                ],
                "dns-server": [

                ],
                "dns-search": [

                ],
                "neighbors": [

                ]
        },
        "data": {
                "cid_4": "2",
                "pdh_4": "-512983392",
                "zone": "wan"
        }
}
root@OpenWrt:~# ip r
default via 10.196.83.66 dev wwan0
10.196.83.64/30 dev wwan0 scope link  src 10.196.83.65
192.168.1.0/24 dev br-lan scope link  src 192.168.1.1
root@OpenWrt:~#
7

All information is in place :wink:

8

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