C819-4G Connectivity issues.

[Thisis789]

Hello all,

Trying to get this 4G router up and running but its not going well. I used CCP Exress to set it up and it works for the most part but only on EDGE(1X) and 3G at extremely slow speeds. It never negotiates its way to 4G and if manually set to be 4G only it wont connect to verizon as it doesn't bring up any of the profiles. Signal is not the issue as its going through a large antenna and an amplifier. SIM card is good, works in 4G LTE stick from Verizon (this is what I pulled the sim out of) and talking with Verizon there is no lock on the card and everything seems good on their end. Not sure what to do now I would really like to use this router over the other solution I rigged up with a PFsense router and the USB stick.

let me know what info you would need from me, Any help is fully appreciated!

Thanks!

[Thisis789]

Here is the out put of the "sh cell 0 all" and "sh run"

https://pastebin.com/VvEYH0xf

in the mean time ive erased my config and started again (the new config is whats in the paste bin) still getting the same issue, setting it to auto lte technology gets connected but extremely slow and forcing LTE it just sits.

[Georg Pauwen]

Hello,

before anything else, you need to configure your NAT. Add the lines in bold to your config:

interface Vlan1
description $ETH-SW-LAUNCH$$INTF-INFO-HWIC 4ESW$
ip address 10.10.10.1 255.255.255.248

ip nat inside
ip tcp adjust-mss 1452

ip nat inside source list 23 interface Cellular0 overload

[Thisis789]

OK, put the lines in the config then copied it back over from TFTP into start and then reloaded the unit. it moved the last command down a few lines but its there, does it matter too much where things are located in the config as long as related things are together? I'm pretty new to Cisco in general but am quickly picking up on the basic commands and can get around a little bit. sadly those commands given haven't made a difference yet but i assume that this tells the router that the "cell 0"is the internet and that "vlan 1" is my lan. The unit is still failing to attach any profiles in both modes now whereas in auto mode it would. below are the readouts from running "sh cell 0 all" the first one is when I leave it in auto mode and the second one is the output of when I force it to run in LTE only mode. Note that the signal is a bit weaker today since its snowing right now and ive seen that play with the signal before on other devices but it should not be hurting it enough to cause it to fail.

https://pastebin.com/rx4wsiVg

[Georg Pauwen]

Hello,

I have made some additions to your configuration, make sure it looks exactly like the one below (important parts marked in bold):

Building configuration...
WLAN_AP_SM: Config command is not supported

Current configuration : 3898 bytes
!
version 15.3
service timestamps debug datetime msec
service timestamps log datetime msec
no service password-encryption
!
hostname 4G
!
boot-start-marker
boot-end-marker
!
aqm-register-fnf
!
logging buffered 51200 warnings
!
no aaa new-model
!
ip dhcp excluded-address 10.10.10.1
!
ip dhcp pool ccp-pool
import all
network 10.10.10.0 255.255.255.248
default-router 10.10.10.1
lease 0 2
!
no ip domain lookup
ip domain name yourdomain.com
ip cef
no ipv6 cef
!
multilink bundle-name authenticated
!
chat-script lte "" "AT!CALL" TIMEOUT 20 "OK"
!
license udi pid C819G-4G-V-K9 sn FTX180681UR
!
username admin privilege 15 password 0 removed
!
controller Cellular 0
!
interface Cellular0
ip address negotiated
ip nat outside
ip virtual-reassembly in
encapsulation slip
load-interval 30
dialer in-band
dialer idle-timeout 0
dialer string lte
dialer-group 1
no peer default ip address
async mode interactive
routing dynamic
!
interface FastEthernet0
no ip address
!
interface FastEthernet1
no ip address
!
interface FastEthernet2
no ip address
!
interface FastEthernet3
no ip address
!
interface GigabitEthernet0
no ip address
shutdown
duplex auto
speed auto
!
interface Serial0
no ip address
shutdown
clock rate 2000000
!
interface Vlan1
description $ETH-SW-LAUNCH$$INTF-INFO-HWIC 4ESW$
ip address 10.10.10.1 255.255.255.248
ip nat inside
!
ip forward-protocol nd
ip http server
ip http access-class 23
ip http authentication local
ip http secure-server
ip http timeout-policy idle 60 life 86400 requests 10000
!
ip route 0.0.0.0 0.0.0.0 Cellular0
!
ip nat inside source list 23 interface Cellular0 overload

!
dialer-list 1 protocol ip permit
no cdp run
!
access-list 23 permit 10.10.10.0 0.0.0.7
!
control-plane
!
mgcp behavior rsip-range tgcp-only
mgcp behavior comedia-role none
mgcp behavior comedia-check-media-src disable
mgcp behavior comedia-sdp-force disable
!
mgcp profile default
!
line con 0
login local
no modem enable
line aux 0
line 2
no activation-character
no exec
transport preferred none
transport input all
stopbits 1
line 3
script dialer lte
modem InOut
no exec
transport input all
transport output all
line vty 0 4
access-class 23 in
privilege level 15
login local
transport input telnet ssh
line vty 5 15
access-class 23 in
privilege level 15
login local
transport input telnet ssh
!
scheduler allocate 20000 1000
!
end

[Thisis789]

Alright, got that copied in, I'm now able to ping from the router to 8.8.8.8 on auto mode (it was in 1X mode when i did but it pinged and got an ip address so it at least works. at this point with your config i think the config side is good but I think the problem I'm having is that the modem settings are stored in the modem pretty sure and for some reason there is something in there that is holding it up on LTE mode.

One of the first guides I saw and messed around with was this about a week ago - https://networkingbodges.blogspot.co.uk/2014/09/configuring-basic-4g-lte-connectivity.html - in the post his is in LTE mode when set to auto so im starting to wonder if i need to do like a full reset on the modem it self or just grab all the configs off the unit and do a full reset on the whole thing and see if it clears things up. or my modem is just slightly fried in which case im not sure what to do. Just for best results i have the amplifier in line with the system now to completely rule out the idea that its bad signal, i do only get two bars on my phone so its not the best but now the readings for the 4G RSSI is in the -60s so its excellent signal.

Thanks for all your help so far I really appreciate it!

[Georg Pauwen]

Hello,

what exactly do you mean wiith 'lte mode' and 'auto mode' ?

[Thisis789]

You can issue a command at the CLI for "cell 0 lte tech auto" or "cell 0 lte tech lte"that sets the radio communication. if i leave mine it auto its borderline useless it wont talk its way up to anything higher that EDGE 1X or barely 3G. why i think that the config does not handle how the radio talks is there doesn't seem to be any lines in the config about it. and you don't need to go into config mode to set it.

So when I say forced LTE mode I ran the second command to lock the radio into only trying to use LTE.

[Georg Pauwen]

Hello,

so you configure this under the controller.

To be honest, I have never seen anyone configuring the controller, in 'auto' mode it should work most of the time.

Just to be sure, can you post your current full config, so I can check if everything is configured correctly ? We might change the MTU settings...

[Thisis789]

yep, by default it comes on auto mode. im not playing with it using "conf > controller cell 0" im just running the commands straight from the enabled CLI. and ive attached the config exactly as pulled of the unit with tftp to my laptop. (made .txt for upload) sorry for the delayed response, got busy yesterday.

[Georg Pauwen]

Hello,

I would do the following:

1. Reset the router to factory defaults (hold the reset button for 10 seconds whike powering on the router)

2. Enter the entire configuration manually

Check if that makes a difference....

[Thisis789]

Hello, just wanted to give you an update since you've been helping me. currently this project is going on hold for a while. After trying your last tips ive pulled the Modem card out of the cisco and have since hooked it up to my laptop directly with a usb adapter (turns out the modem cards in these things are just USB over Mini PCI-E) and it's still showing the exact same issues. searching around has found that some of these modems have a bad firmware on them that causes the exact issue im having. So card is basically useless, currently looking at getting a newer model of the same series and will either use that directly or try putting it in the cisco and see what that does.

[Georg Pauwen]

Hello,

which exact model do you have (post the output of 'show version'), I can try and find a different firmware version...

[Thisis789]

4G#sh version
Cisco IOS Software, C800 Software (C800-UNIVERSALK9-M), Version 15.3(3)M1, RELEASE SOFTWARE (fc1)
Technical Support: http://www.cisco.com/techsupport
Copyright (c) 1986-2013 by Cisco Systems, Inc.
Compiled Tue 22-Oct-13 05:46 by prod_rel_team

ROM: System Bootstrap, Version 15.2(2r)T, RELEASE SOFTWARE (fc1)

4G uptime is 3 minutes
System returned to ROM by power-on
System image file is "flash:c800-universalk9-mz.SPA.153-3.M1.bin"
Last reload type: Normal Reload
Last reload reason: power-on

This product contains cryptographic features and is subject to United
States and local country laws governing import, export, transfer and
use. Delivery of Cisco cryptographic products does not imply
third-party authority to import, export, distribute or use encryption.
Importers, exporters, distributors and users are responsible for
compliance with U.S. and local country laws. By using this product you
agree to comply with applicable laws and regulations. If you are unable
to comply with U.S. and local laws, return this product immediately.

A summary of U.S. laws governing Cisco cryptographic products may be found at:
http://www.cisco.com/wwl/export/crypto/tool/stqrg.html

If you require further assistance please contact us by sending email to
export@cisco.com.

Cisco C819G-4G-V-K9 (revision 6.0) with 883788K/33715K bytes of memory.
Processor board ID FTX180681UR
4 FastEthernet interfaces
1 Gigabit Ethernet interface
1 Serial(sync/async) interface
2 terminal lines
1 Virtual Private Network (VPN) Module
1 Cellular interface
1 cisco Embedded AP (s)
DRAM configuration is 32 bits wide
255K bytes of non-volatile configuration memory.
999936K bytes of ATA System CompactFlash (Read/Write)

License Info:

License UDI:

-------------------------------------------------
Device# PID SN
-------------------------------------------------
*0 C819G-4G-V-K9 FTX180681UR

License Information for 'c800'
License Level: advipservices Type: Permanent
Next reboot license Level: advipservices

Configuration register is 0x2102

[Georg Pauwen]

Hello

sorry, didn't see that you posted the config. I'll have a look...