Configuring LTE 4G as primary WAN on Cisco 1921 K9

[williampeasley]

Hi All,

I have started a quick setup via the Cisco CP Express web UI and have run into an issue.

When selecting Cellular0/0/0 as the primary WAN, and I finalise the setup, I get an error: "Invalid input detected. Command: dialer string".

The CLI preview is below, which I tried to run execute in a terminal, but no luck.

Any assistance would be great!

Thanks,

William

Cisco Configuration

Professional Express


Quick Setup Wizard
Basic
Primary WAN
Backup WAN
LAN
Confirm & Apply

Invalid input detected. Command: dialer string
Summary
Basic
  Router Name:VT-STKN-RTR-0001
  Domain Name:vergetel
  TimeZone:(GMT+10:00) Canberra, Melbourne, Sydney
  DNS Server:Automatic
 Primary WAN
 WAN Interface: Cellular 0/0/0
 Ipv4: Automatic
 Ipv6: Not configured
 NAT: Enabled
 Persistance: Enabled
 Backup WAN
Not Configured

 LAN
 LAN Interface: Vlan 1 with switch ports GigabitEthernet
 LAN Network: 10.10.10.0
 Subnet Mask: 255.255.255.128
 Security
Not Configured

CLI Preview
Cancel
CLI Preview
close
hostname VT-STKN-RTR-0001

ip domain name vergetel

clock timezone GMT 10

ip dhcp pool ccp-pool
dns-server 10.10.10.1
exit
ip dns server

ip dns view default
default dns forwarder
default dns forwarding
default domain lookup
default domain name-server

interface GigabitEthernet0/1
ip nat inside
exit

object-group network local_lan_subnets
10.10.10.0 255.255.255.128

ip access-list extended nat-list
permit ip object-group local_lan_subnets any
deny ip any any

default interface Cellular 0/0/0

no chat-script lte

chat-script lte "" "AT!CALL1" TIMEOUT 20 "OK"

interface Dialer1
description PrimaryWANDesc___Cellular0/0/0
encapsulation slip
ip nat outside
ip address negotiated
dialer pool 1
dialer-group 1
dialer persistent
dialer string
dialer idle-timeout 0
no shut
exit

interface Cellular 0/0/0
description PrimaryWANDesc_
no shut
load-interval 30
dialer in-band
no peer default ip address
dialer pool-member 1
async mode interactive
ip nat outside
exit

line 0/0/0
script dialer
modem InOut
no exec
transport input all
transport output all

ip forward-protocol nd
dialer-list 1 protocol ip permit

access-list 23 permit 10.10.10.0 0.0.0.127
ip route 0.0.0.0 0.0.0.0 Dialer1
ip nat inside source list nat-list interface Dialer1 overload

[marce1000]

 - Check if this thread can provide hints :

             https://community.cisco.com/t5/routing/help-configuring-lte-4g-on-cisco-c887vag-4g-ga-k9/td-p/3709096

  M.

[williampeasley]

Thanks, Marce, this was the thread I referred to and still couldn't get it working.

[Giuseppe Larosa]

Hello,

the dialer string command requires a parameter that is the number to be called

dialer string   <string>

in your configuration it appears with  no parameter.

see the following configuration guide for LTE 4G

https://www.cisco.com/c/en/us/td/docs/routers/access/interfaces/software/feature/guide/ehwic-4g-ltesw-book.html#task_1334022

in addiiton the script dialer appears not defined in your configuration.

Follow the guide provided above as before being able to use the Cellular interface there are some steps to be done like configuring the SIM for data calls and so on.

if you provide a show inventory we can see what exact model of hardware is in your router.

Hope to help

Giuseppe

[paul driver]

Hello

Try adding :

interface Cellular 0/0/0
ip address negotiated

line 0/0/0
script dialer lte

[williampeasley]

Hi Paul,

I just tried the following in the Configure CLI section of CP Express and got an error: "invalid input detected". I added the two config lines to their indicated locations in the command and still nothing - see screenshot.

I copied and paste the below directly into the CLI, so could there be a formatting issue?

hostname VT-STKN-RTR-0001
!
ip domain name vergetel
!
clock timezone GMT 10
!
ip dhcp pool ccp-pool
dns-server 10.10.10.1
exit
ip dns server
!
ip dns view default
default dns forwarder
default dns forwarding
default domain lookup
default domain name-server
!
interface GigabitEthernet0/1
ip nat inside
exit
!
object-group network local_lan_subnets
10.10.10.0 255.255.255.128
!
ip access-list extended nat-list
permit ip object-group local_lan_subnets any
deny ip any any
!
default interface Cellular 0/0/0
!
no chat-script lte
!
chat-script lte "" "AT!CALL1" TIMEOUT 20 "OK"
!
interface Dialer1
description PrimaryWANDesc___Cellular0/0/0
encapsulation slip
ip nat outside
ip address negotiated
dialer pool 1
dialer-group 1
dialer persistent
dialer string
dialer idle-timeout 0
no shut
exit
!
interface Cellular 0/0/0
description PrimaryWANDesc_
no shut
load-interval 30
dialer in-band
no peer default ip address
ip address negotiated
dialer pool-member 1
async mode interactive
ip nat outside
exit
!
line 0/0/0
script dialer lte
modem InOut
no exec
transport input all
transport output all
!
ip forward-protocol nd
dialer-list 1 protocol ip permit
!
access-list 23 permit 10.10.10.0 0.0.0.127
ip route 0.0.0.0 0.0.0.0 Dialer1
ip nat inside source list nat-list interface Dialer1 overload

[williampeasley]

I just got that command to work after adding the dialer string to a third section:

interface Dialer1
dialer string lte

 Now when I check back in the interfaces tab, cellular 0/0/0 is showing 'down'. I've restarted the unit and no change.

I've also configured GigabitEthernet0/0 to work with IPv4 DHCP, so I'll assume no further programming is required for that interface to now work as the non-management LAN interface.

Thanks again and await your reply.