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MobiusToad
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Location: Missouri, USA

Internet Stopped Working: RBM11G/Quectel RM502Q-AE/Tmobile

Thu Apr 28, 2022 11:55 pm

Here is my previous post: viewtopic.php?t=181031

The internet had been working since then, but went out nearly two weeks ago. Power went out for a second or two during a mild storm, internet was gone. I got it back for a couple hours the next morning, IIRC, but then it went out and I couldn't get it back. I updated the OS/firmware of my RBM11G to 7.2.1, nothing. I updated the firmware of the RM502Q-AE to the latest, nothing. I decided to finally eliminate one possible issue a few days ago. After testing signal quality in several locations, I moved my antenna from a pole on my roof to the corner of my garage under an eve. It worked for 4-5 hours and then quit. Rebooting didn't bring it back, so I shut it down and unplugged it. The following morning I went outside and made sure everything was connected nice and tight, plugged it in and I had the internet... for about 6 hours. The next morning I disconnected everything. Connections look good and clean, tightened everything up, still not working. Downgraded everything and redid my configuration, nothing. Upgraded again, nothing. The time/date was wrong due to me resetting configuration, but it eventually corrected itself (from the internet?).

I can ping 8.8.8.8 and google.com perfectly fine from the winbox console. Nothing timeouts or packets dropped, unlike while it was on the roof. I can ping 8.8.8.8 from a command prompt on my PC, but not google.com. While it was working the last two times I was hitting ~80mbits, vs ~45mbits on my roof.

My config:

# apr/28/2022 12:28:03 by RouterOS 7.2.1
# software id = ####-####
#
# model = RBM11G
# serial number = ###########
/interface list
add name=WAN
add name=LAN
/interface lte apn
set [ find default=yes ] apn=Fast.t-mobile.com use-network-apn=no
add apn=Fast.t-mobile.com
/interface wireless security-profiles
set [ find default=yes ] supplicant-identity=MikroTik
/ip pool
add name=dhcp_pool0 ranges=192.168.88.2-192.168.88.254
/ip dhcp-server
add address-pool=dhcp_pool0 interface=ether1 name=dhcp1
/port
set 0 name=serial0
/interface lte
set [ find ] allow-roaming=no apn-profiles=Fast.t-mobile.com band="" mtu=1472 name=lte1 network-mode=3g,lte,5g,*5 nr-band=""
/interface list member
add interface=lte1 list=WAN
add interface=ether1 list=LAN
/interface ovpn-server server
set auth=sha1,md5
/ip address
add address=192.168.88.1/24 comment=defconf interface=ether1 network=192.168.88.0
/ip dhcp-server network
add address=192.168.88.0/24 dns-server=8.8.8.8,8.8.4.4 gateway=192.168.88.1
/ip firewall mangle
add action=change-ttl chain=prerouting in-interface=lte1 new-ttl=set:65 passthrough=yes
add action=change-ttl chain=postrouting new-ttl=set:65 out-interface=lte1 passthrough=yes
/ip firewall nat
add action=masquerade chain=srcnat out-interface=lte1
/system clock
set time-zone-autodetect=no time-zone-name=US/Central
/system routerboard settings
set auto-upgrade=yes
/tool sms
set port=lte1 receive-enabled=yes

My log on reboot:

12:25:11 system,info router rebooted
12:25:24 interface,info ether1 link up (speed 1G, full duplex)
12:25:29 lte,info lte1: IPV4: 192.0.0.2, DNS: 1
12:25:29 lte,info lte1: IPv6: 2607:fb90:3992:8045:9c1e:cefd:36c0:bc56, DNS: 2
12:25:29 interface,info lte1 link up
12:25:30 system,info,account user ********** logged in from 192.168.88.254 via winbox
12:25:32 system,info,account user ********** logged in from 192.168.88.254 via local

My IP/Routes

DAm 0.0.0.0/0 lte1 2
DAc 192.0.0.2/32 lte1 0
DAc 192.168.88.0/24 ether1 0

Any idea what might be the problem?

Thanks,
Joe
Last edited by MobiusToad on Fri Apr 29, 2022 4:31 am, edited 1 time in total.
 
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Re: Internet Stopped Workig: RBM11G/Quectel RM502Q-AE/Tmobile

Fri Apr 29, 2022 12:18 am

I do not have a LTE device with RouterOS 7.2.1
but this on export is stange...

on /interface lte

band=""
empty?

network-mode=3g,lte,5g,*5
an id *5 instead of "something" on mode???

nr-band=""
empty?
 
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MobiusToad
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Posts: 28
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Location: Missouri, USA

Re: Internet Stopped Workig: RBM11G/Quectel RM502Q-AE/Tmobile

Fri Apr 29, 2022 2:42 am

I do not have a LTE device with RouterOS 7.2.1
but this on export is stange...

on /interface lte

band=""
empty?

network-mode=3g,lte,5g,*5
an id *5 instead of "something" on mode???

nr-band=""
empty?
None of that was there on my 7.1 config. I never manually inputted bands or changed network mode. No idea what *5 is either. Going through the same setup process, 7.2.1 simply seems to print the defaults for those options as far as I can tell.

Just turned my modem on to see if it happened to start working, a big nope, and my signal quality seems to have gone to crap. -2 to -4 SINR, which is the worst I've seen while in winbox. Was getting 6 earlier today. Would rain cause that?
 
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Re: Internet Stopped Workig: RBM11G/Quectel RM502Q-AE/Tmobile

Fri Apr 29, 2022 2:46 am

I do not have 7.2.1 on one LTE to check, but empty band = all band used on v7?
 
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Re: Internet Stopped Workig: RBM11G/Quectel RM502Q-AE/Tmobile

Fri Apr 29, 2022 2:50 am

Try to paste this:
/interface lte
set [ find ] !band !network-mode !nr-band
 
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MobiusToad
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Re: Internet Stopped Workig: RBM11G/Quectel RM502Q-AE/Tmobile

Fri Apr 29, 2022 4:19 am

I do not have 7.2.1 on one LTE to check, but empty band = all band used on v7?

That's my guess.

Try to paste this:
/interface lte
set [ find ] !band !network-mode !nr-band

syntax error (line 1 column 14)

I'm not familiar enough with RouterOS commands to attempt to fix the syntax myself.
 
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MobiusToad
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Re: Internet Stopped Working: RBM11G/Quectel RM502Q-AE/Tmobile

Tue May 03, 2022 9:29 pm

My NVME drive prematurely died on me, so I've been getting my workstation up and running again the last few days. Tried it again today (another rainy day), still not working outside of pinging google.com from winbox. Updated it to 7.2.2 and everything is still the same. SINR is between 0 and 2 again. It was between 6-10 after I moved it, and haven't seen that since.

I feel like the only thing I have left to try is to spend more money, which is something I really don't want to do at the moment, and buy a new antenna/cables, even though they aren't old and I see no visual degradation. I'd love to change the IMEI to that of a phone to is TMO is the problem, but I can't find the at commands to do that.

Could my SINR go to crap if the antenna connection has degraded?

Would I experience this lack of connection, while still being able to ping, due to my signal being poor?
 
hecatae
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Re: Internet Stopped Working: RBM11G/Quectel RM502Q-AE/Tmobile

Thu May 05, 2022 11:34 pm

What information from my Chateau 5G would be beneficial?
 
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MobiusToad
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Posts: 28
Joined: Tue Dec 07, 2021 9:09 pm
Location: Missouri, USA

Re: Internet Stopped Working: RBM11G/Quectel RM502Q-AE/Tmobile

Fri May 06, 2022 2:52 am

What information from my Chateau 5G would be beneficial?

I wish I knew exactly what would help, but I'm kind of lost at the moment. I have a post over on reddit I'm trying to get help from as well. I'm definitely leaning away from anything hardware related, especially with the 10-12 SINR I had yesterday... before it rained and dropped to 0-2 again. Weather-wise, it seems when it's raining or wet out my SINR gets worse and a good solid snow makes it better.

My issue seems to be DNS related. Over in the reddit post I got it to the point that I could ping google.com from my PC, by getting rid of 8.8.8.8/8.8.4.4 as my DNS servers, but I'm still not getting any internet access either directly connected to my PC or to any device when it's connected to my router.

Anything DHCP and DNS related might help.

Are you using tmobile? Try
ip dns> print
so I can compare it with mine. Maybe post your configuration as well.

Thanks.
 
hecatae
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Re: Internet Stopped Working: RBM11G/Quectel RM502Q-AE/Tmobile

Sat May 14, 2022 2:16 pm

I'm not using T-Mobile, I'm using 3 UK, and my Chateau 5G is running 7.2.3.

Just trying to help with using the same modem.

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