Cisco 1921 / 4GLTE EHWIC - Primary Int G0/0 and Backup Cellular 0/0/0 Issues

[screch101]

Hello,

I am looking for some help solving a problem with a Cisco 1921 and the Verizon 4G EHWIC card.  I have configured the router and it is working and was looking to add the 4G as a backup to the primary connection G0/0.  The cell interface is at Cellular0/0/0.  If I add the following command ip address negotiated to the cellular interface then the G0/0 basically stops working and I loose all internet connectivity until that startment is removed.  I don't understand why this is occurring.  Any help would be appreciated.  The only item I can think of is adding the additional something with NAT not configured correctly for that interface.  Does not seem that the cellular interface "dials" when the G0/0 interface goes down.  I have researched and have tried many different changes but nothing is fixing this issue.  The firmware is up to date on the modem and the IOS is 15.5.3.  Thanks in advance for any advice.  Below is the snippet of the config with sections removed to keep size down that does not pertain I believe.  Also included below is the cellular interface info.

version 15.5
no service pad
service tcp-keepalives-in
service tcp-keepalives-out
service timestamps debug datetime msec localtime show-timezone
service timestamps log datetime msec localtime show-timezone
service password-encryption
service sequence-numbers
!
hostname Router
!
boot-start-marker
boot system flash:c1900-universalk9-mz.SPA.155-3.M.bin
boot-end-marker
!
!
security authentication failure rate 3 log
security passwords min-length 6
logging buffered 51200
logging console critical
!
aaa new-model
!
!
aaa authentication login local_access local
aaa authentication login local_authen local
aaa authorization exec local_author local
!
!
!
!
!
aaa session-id common
ethernet lmi ce
clock timezone EST -5 0
clock summer-time EDT recurring
!
!
!
!
!
!
no ip source-route
!
!
!
ip dhcp excluded-address 10.7.20.1 10.7.20.120
!
ip dhcp pool LAN
 import all
 network 10.7.20.0 255.255.255.0
 dns-server 71.243.0.12 71.250.0.12
 default-router 10.7.20.1
!
!
!
no ip bootp server
ip name-server 71.243.0.12
ip name-server 71.250.0.12
ip name-server 8.8.8.8
ip name-server 8.8.4.4
ip ips config location flash:ips retries 1
ip ips notify SDEE
ip ips name IOS-IPS
!
ip ips signature-category
  category all
   retired true
   enabled false
  category ios_ips basic
   retired false
   enabled true
!
ip cef
no ipv6 cef
!
!
flow record nbar-appmon
 match ipv4 source address
 match ipv4 destination address
 match application name
 collect interface output
 collect counter bytes
 collect counter packets
 collect timestamp absolute first
 collect timestamp absolute last
!
!
flow monitor application-mon
 cache timeout active 60
 record nbar-appmon
!
parameter-map type inspect global
 max-incomplete low 18000
 max-incomplete high 20000
 nbar-classify
multilink bundle-name authenticated
!
chat-script lte "" "AT3CALL" TIMEOUT 60 "OK"
password encryption aes
cts logging verbose
!
crypto pki trustpoint TP-self-signed-2901148831
 enrollment selfsigned
 subject-name cn=IOS-Self-Signed-Certificate-2901148831
 revocation-check none
 rsakeypair TP-self-signed-2901148831
!
!
license udi pid CISCO1921/K9 sn XXXXXXXXX
license boot module c1900 technology-package datak9
!
!

!
object-group network local_lan_subnets
 10.7.20.0 255.255.255.0
!

!
username XXXXX privilege 15 secret 5
username XXXXX privilege 12 secret 5
!
redundancy
!
!
!
!
!
controller Cellular 0/0
 lte modem link-recovery rssi onset-threshold -110
 lte modem link-recovery monitor-timer 20
 lte modem link-recovery wait-timer 10
 lte modem link-recovery debounce-count 6
no cdp run
!
ip tcp synwait-time 10
!
!
policy-map type inspect LAN-WAN-POLICY
 
policy-map type inspect WAN-LAN-POLICY
!
zone security LAN
zone security WAN
zone security VPN
zone security DMZ
zone-pair security LAN-WAN source LAN destination WAN
 service-policy type inspect LAN-WAN-POLICY
zone-pair security WAN-LAN source WAN destination LAN
 service-policy type inspect WAN-LAN-POLICY
!
!
!
!
!
interface Embedded-Service-Engine0/0
 no ip address
 no ip redirects
 no ip unreachables
 no ip proxy-arp
 ip flow ingress
 ip virtual-reassembly in
 shutdown
!
interface GigabitEthernet0/0
 description PrimaryWANDesc_FiOS
 ip address dhcp
 no ip redirects
 no ip unreachables
 no ip proxy-arp
 ip flow ingress
 ip nat outside
 ip ips IOS-IPS in
 ip virtual-reassembly in
 zone-member security WAN
 duplex auto
 speed auto
 no mop enabled
!
interface GigabitEthernet0/1
 description Home LAN
 ip address 10.7.20.1 255.255.255.0
 no ip redirects
 no ip proxy-arp
 ip nbar protocol-discovery
 ip flow monitor application-mon input
 ip flow ingress
 ip flow egress
 ip nat inside
 ip virtual-reassembly in
 zone-member security LAN
 load-interval 30
 duplex auto
 speed auto
 no mop enabled
!
interface Cellular0/0/0
 description BackupWANDesc_LTE
 no ip address
 ip nat outside
 ip virtual-reassembly in
 encapsulation slip
 dialer in-band
 dialer string lte
 async mode interactive
!
ip forward-protocol nd
!
ip http server
ip http upload enable path flash:
ip http upload overwrite
ip http authentication local
ip http secure-server
ip http timeout-policy idle 60 life 86400 requests 10000
!
no ip ftp passive
ip nat inside source list nat-list interface GigabitEthernet0/0 overload

ip route 0.0.0.0 0.0.0.0 GigabitEthernet0/0 track 1
ip route 0.0.0.0 0.0.0.0 Cellular0/0/0 253
ip route 8.8.8.8 255.255.255.255 GigabitEthernet0/0
!
logging trap debugging
dialer-list 1 protocol ip permit
!
!
!
!
!
control-plane
!
!
banner incoming ^CCisco 1921 K9/Security^C
banner login ^C

  *** UNAUTHORIZED ACCESS TO THIS DEVICE IS PROHIBITED ***
             For Authorized Offical Use Only
        You must have explicit permission to access
    or configure this device.  All activities performed
      on this device are logged, and violations of
           this policy may be reported to law
                 enforcement authorities.
         There is no right to privacy on this device. ^C
!
line con 0
 login authentication local_access
line aux 0
line 2
 no activation-character
 no exec
 transport preferred none
 transport output pad telnet rlogin lapb-ta mop udptn v120 ssh
 stopbits 1
line 0/0/0
 script dialer lte
 modem InOut
 no exec
line vty 0 4
 access-class 23 in
 privilege level 15
 login authentication local_access
 transport input telnet ssh
!
scheduler allocate 20000 1000
ntp update-calendar
ntp server 131.107.13.100 prefer source GigabitEthernet0/0
!
end

Cellular Info Below:

Cellular 0/0/0 Interface Info

show cellular 0/0/0 network

Current System Time = Mon Aug 24 2:57:48 2015
Current Service Status = Normal
Current Service = Packet switched
Current Roaming Status = Home
Network Selection Mode = Automatic
Network = Verizon Wireless
Mobile Country Code (MCC) = 311
Mobile Network Code (MNC) = 480
Packet switch domain(PS) state = Attached
Registration state(EMM) = Registered
EMM Sub State = Normal Service
Tracking Area Code (TAC) = 14595
Cell ID = 14598913

show cellular 0/0/0 radio

Radio power mode = ON
LTE Rx Channel Number =  5230
LTE Tx Channel Number =  23230
LTE Band =  13
LTE Bandwidth = 10 MHz
Current RSSI = -83 dBm
Current RSRP = -116 dBm
Current RSRQ = -17 dB
Current SNR = -2.0  dB
Radio Access Technology(RAT) Preference = AUTO
Radio Access Technology(RAT) Selected = LTE

show cellular 0/0/0 profile

Profile password Encryption level: 7

Profile 1 = INACTIVE **
--------
PDP Type = IPv4
Access Point Name (APN) = vzwinternet
Authentication = None

Profile 2 = INACTIVE
--------
PDP Type = IPv4v6
Access Point Name (APN) = vzwadmin
Authentication = None

Profile 3 = INACTIVE*
--------
PDP Type = IPv4
Access Point Name (APN) = vzwinternet
Authentication = None

Profile 4 = INACTIVE
--------
PDP Type = IPv4v6
Access Point Name (APN) = vzwapp
Authentication = None

Profile 5 = INACTIVE
--------
PDP Type = IPv4
Access Point Name (APN) =
Authentication = None

  * - Default profile
 ** - LTE attach profile

show cellular 0/0/0 security

Card Holder Verification (CHV1) = Disabled
SIM Status = OK
SIM User Operation Required = None
Number of CHV1 Retries remaining = 3

show cellular 0/0/0 all

Hardware Information
====================
Modem Firmware Version = SWI9600M_03.05.10.06ap
Modem Firmware built = 2012/11/12 15:07:45
Hardware Version = 10
Device Model ID: MC7750
Package Identifier ID: MC7750_03.05.10.06_00_vzw_033.011_000
International Mobile Subscriber Identity (IMSI) = 311480039061020
International Mobile Equipment Identity (IMEI) = 990000820070961
Integrated Circuit Card ID (ICCID) = 89148000000384557279
Mobile Subscriber Integrated Services
Digital Network-Number (MSISDN) = 7745030447
Current Modem Temperature = 34 deg C
PRI SKU ID = 9900853, PRI version = 00.05, Carrier = 5

Profile Information
====================
Profile password Encryption level: 7

Profile 1 = INACTIVE **
--------
PDP Type = IPv6
Access Point Name (APN) = vzwims
Authentication = None

Profile 2 = INACTIVE
--------
PDP Type = IPv4v6
Access Point Name (APN) = vzwadmin
Authentication = None

Profile 3 = INACTIVE*
--------
PDP Type = IPv4
Access Point Name (APN) = vzwinternet
Authentication = None

Profile 4 = INACTIVE
--------
PDP Type = IPv4v6
Access Point Name (APN) = vzwapp
Authentication = None

Profile 5 = INACTIVE
--------
PDP Type = IPv4
Access Point Name (APN) =
Authentication = None

  * - Default profile
 ** - LTE attach profile

Data Connection Information
===========================
Profile 1, Packet Session Status = INACTIVE
Profile 2, Packet Session Status = INACTIVE
Profile 3, Packet Session Status = INACTIVE
Profile 4, Packet Session Status = INACTIVE
Profile 5, Packet Session Status = INACTIVE
Profile 6, Packet Session Status = INACTIVE

Network Information
===================
Current System Time = Mon Aug 24 3:1:8 2015
Current Service Status = Normal
Current Service = Packet switched
Current Roaming Status = Home
Network Selection Mode = Automatic
Network = Verizon Wireless
Mobile Country Code (MCC) = 311
Mobile Network Code (MNC) = 480
Packet switch domain(PS) state = Attached
Registration state(EMM) = Registered
EMM Sub State = Normal Service
Tracking Area Code (TAC) = 14595
Cell ID = 14598913

Radio Information
=================
Radio power mode = ON
LTE Rx Channel Number =  5230
LTE Tx Channel Number =  23230
LTE Band =  13
LTE Bandwidth = 10 MHz
Current RSSI = -83 dBm
Current RSRP = -117 dBm
Current RSRQ = -17 dB
Current SNR = -3.3  dB
Radio Access Technology(RAT) Preference = AUTO
Radio Access Technology(RAT) Selected = LTE

Modem Security Information
==========================
Card Holder Verification (CHV1) = Disabled
SIM Status = OK
SIM User Operation Required = None
Number of CHV1 Retries remaining = 3

GPS Information
==========================

GPS Info
-------------
GPS Feature: enabled
GPS Port Selected: Dedicated GPS port
GPS State: GPS disabled

SMS Information
===============
Incoming Message Information
----------------------------
SMS stored in modem = 23
SMS archived since booting up = 0
Total SMS deleted since booting up = 0
Storage records allocated = 25
Storage records used = 23
Number of callbacks triggered by SMS = 0
Number of successful archive since booting up = 0
Number of failed archive since booting up = 0

Outgoing Message Information
----------------------------
Total SMS sent successfully = 0
Total SMS send failure = 0
Number of outgoing SMS pending = 0
Number of successful archive since booting up = 0
Number of failed archive since booting up = 0
Last Outgoing SMS Status = SUCCESS
Copy-to-SIM Status =     0x0
Send-to-Network Status = 0x0
Report-Outgoing-Message-Number:
  Reference Number =     0
  Result Code =          0x0
  Diag Code =            0x0 0x0 0x0 0x0 0x0

SMS Archive URL =

Error Information
=================

This command is not supported on this platform.

Modem Crashdump Information
===========================
Modem crashdump logging: off

[gnm1978]

Hi, I know this post was three years ago but I'm also having problem with the cellular connections flapping. Did you by any chance solve your issue with IP SLA? if you did can you post your config? Any help would be appreciated.