We have several Cisco 1941 routers which have a EHWIC-4G-LTE-V installed. We use the cellular connection for an IPSec tunnel in case our MPLS connection goes down. Verizon has given us a static public IP address which has been assigned to the router. Frequently, the cellular interface loses the static public IP address but the interface remains UP/UP. I also notice that the APN profile is INACTIVE when this problem occurs.
When this occurs I have verified with Verizon there are no issues on their end. If I run the command "show cellular (interface number) all" I have confirmed that the device is getting a good signal (usually -50 to -70 dBm). In each case, I have tried shutting down the cellular interface and bringing it back up. I have also tried resetting the modem by running the command "test cellular (interface number) modem-power-cycle". Neither of these steps resolves the issue. The only thing I can do to resolve the issue is to reload the router which is not a good solution since our site loses MPLS connectivity during the reload.
I am curious if anyone else has had a similar issue and whether you've found out why this is occurring. I have included our router configuration and cellular details below.
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MMR345.CHIL# show ver
Cisco IOS Software, C1900 Software (C1900-UNIVERSALK9-M), Version 15.4(3)M2, RELEASE SOFTWARE (fc2)
MMR345.CHIL# show cellular 0/1/0 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_033.010_000
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no service pad
service timestamps debug datetime msec localtime show-timezone
service timestamps log datetime msec localtime show-timezone
service password-encryption
service internal
service sequence-numbers
!
hostname MMR345.CHIL
!
boot-start-marker
boot-end-marker
!
!
security authentication failure rate 10 log
security passwords min-length 6
logging console critical
!
aaa new-model
!
!
!
!
!
!
!
aaa session-id common
clock summer-time CDT recurring
!
!
!
!
!
!
no ip source-route
no ip gratuitous-arps
!
!
!
!
!
!
!
!
!
!
!
ip vrf MMR
description Masergy MMR-MGMT
rd 19855:1688896
maximum routes 1000 90 reinstall 90
!
!
!
!
!
multilink bundle-name authenticated
!
chat-script lte "" "AT!CALL" TIMEOUT 60 "OK"
cts logging verbose
!
!
license udi pid CISCO1941/K9 sn FJC1926E0L6
!
!
archive
log config
logging enable
logging size 1000
notify syslog contenttype plaintext
hidekeys
!
redundancy
notification-timer 120000
!
!
!
!
!
controller Cellular 0/1
lte sim data-profile 3 attach-profile 1
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 ftp source-interface GigabitEthernet0/0.96
!
!
crypto isakmp policy 10
encr aes
authentication pre-share
group 5
crypto isakmp key xxxxx address x.x.x.x
crypto isakmp keepalive 10 periodic
!
!
crypto ipsec transform-set strong esp-aes esp-sha-hmac
mode tunnel
crypto ipsec df-bit clear
!
!
crypto ipsec profile xxxxxxx
set transform-set strong
!
!
!
!
!
!
!
interface Tunnel0
ip address 10.254.3.242 255.255.255.252
ip tcp adjust-mss 1360
tunnel source x.x.x.x
tunnel mode ipsec ipv4
tunnel destination x.x.x.x
tunnel protection ipsec profile xxxxxx
!
interface Embedded-Service-Engine0/0
no ip address
shutdown
!
interface GigabitEthernet0/0
description CONNECTION_TO_MASERGY
no ip address
ip flow ingress
ip flow egress
duplex auto
speed auto
!
interface GigabitEthernet0/0.96
encapsulation dot1Q 96
ip vrf forwarding MMR
ip address 10.60.17.89 255.255.252.0
!
interface GigabitEthernet0/0.453
encapsulation dot1Q 453
ip address 10.254.1.242 255.255.255.252
no cdp enable
!
interface GigabitEthernet0/1
description CONNECTION_TO_LAN
ip address 192.168.15.254 255.255.255.0
ip flow ingress
ip flow egress
ip tcp adjust-mss 1360
duplex auto
speed auto
!
interface FastEthernet0/0/0
no ip address
shutdown
duplex auto
speed auto
!
interface FastEthernet0/0/1
no ip address
shutdown
duplex auto
speed auto
!
interface Cellular0/1/0
ip address negotiated
encapsulation slip
dialer in-band
dialer string lte
dialer-group 1
!
!
router eigrp xxxxx
distribute-list route-map loopPrevent in
network 192.168.15.0
redistribute connected
redistribute bgp 65117
eigrp router-id 192.168.15.254
!
router bgp xxxxx
bgp log-neighbor-changes
network 10.30.21.0 mask 255.255.255.0
network 10.254.1.240 mask 255.255.255.252
network 192.168.15.0
network 192.168.115.0
neighbor 10.254.1.241 remote-as 19855
neighbor 10.254.1.241 description "Peer to ESR"
neighbor 10.254.1.241 send-community both
neighbor 10.254.3.241 remote-as 19855
neighbor 10.254.3.241 send-community
neighbor 10.254.3.241 soft-reconfiguration inbound
neighbor 10.254.3.241 route-map naas-depref in
neighbor 10.254.3.241 route-map naas-community out
!
ip forward-protocol nd
!
ip bgp-community new-format
no ip http server
no ip http secure-server
!
!
ip sla 1
icmp-echo 10.254.3.241 source-ip 10.254.3.242
frequency 5
ip sla schedule 1 life forever start-time now
logging host 64.47.61.150 vrf MMR
logging host 64.47.61.186 vrf MMR
dialer-list 1 protocol ip permit
!
route-map naas-depref permit 10
set local-preference 70
!
route-map naas-community permit 10
set community 19855:70
!
route-map loopPrevent deny 10
match tag 19855 800 65000
!
route-map loopPrevent permit 20
!
!
^C
!
line con 0
length 0
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 0/1/0
script dialer lte
no exec
rxspeed 100000000
txspeed 50000000
!
end
