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887M 3G modem - link flapping

darren.g
Level 5
Level 5

Folks.

I've been handed an 887M with a PCEX-3G-HSPA-R6 card in it, and asked to get it working on the big, bad internet.

I've managed to get it to the point that it at least *tries* to connect to the internet over the 3G network - but I've run into a problem I can;t, for all my google-fu, find an answer to.

Details - Router is an 887M/K9, running 15.1(1)T1. 3G SIM is confirmed OK (I've put it into my laptop, which has a cellular modem, and it works fine).

What happens is that the ce0 interface connects, and then immediately drops, and goes into reset mode. I'm stuffed if I know why - not sure if I need to do a firmware change to it, or soemthing else to the config.

Config (which is very basic - I just want it on the internet before I get fancy) is below

Router#sh run

Building configuration...

Current configuration : 1504 bytes

!

! Last configuration change at 03:48:36 UTC Tue Nov 20 2012

!

version 15.1

no service pad

service timestamps debug datetime msec

service timestamps log datetime msec

no service password-encryption

service internal

!

hostname Router

!

boot-start-marker

boot-end-marker

!

no aaa new-model

!

memory-size iomem 10

!

ip source-route

!

ip cef

no ipv6 cef

!

multilink bundle-name authenticated

chat-script INTERNET "" "ATDT*98*4#" TIMEOUT 30 CONNECT

license udi pid CISCO887G-K9 sn FHK1441708M

!

controller Cellular 0

interface ATM0

no ip address

shutdown

no atm ilmi-keepalive

dsl bitswap both

!

interface FastEthernet0

!

interface FastEthernet1

!

interface FastEthernet2

!

interface FastEthernet3

!

interface Cellular0

ip address negotiated

ip virtual-reassembly

encapsulation ppp

load-interval 60

dialer in-band

dialer pool-member 2

async mode interactive

no fair-queue

!

interface Vlan1

no ip address

!

interface Dialer2

ip address negotiated

encapsulation ppp

dialer pool 2

dialer idle-timeout 0

dialer string INTERNET

dialer persistent

dialer-group 2

ppp ipcp dns request

ip forward-protocol nd

no ip http server

no ip http secure-server

!

!

ip route 0.0.0.0 0.0.0.0 Dialer2

!

dialer-list 2 protocol ip permit

!

!

!

!

!

control-plane

!

!

line con 0

no modem enable

line aux 0

line 3

exec-timeout 0 0

script dialer INTERNET

modem InOut

no exec

transport input all

speed 237000

line vty 0 4

login

transport input all

!

end

(yes, I know it's insecure - I don't care at this point).

show cellular 0 all gives me this

Hardware Information

====================

Modem Firmware Version = K2_0_7_19AP C:/WS/F

Modem Firmware built = 10/26/09

Hardware Version = 1.0

International Mobile Subscriber Identity (IMSI) = 505013483609158

International Mobile Equipment Identity (IMEI) = 359109030111518

Integrated Circuit Card ID (ICCID) = 89610185305853000085

Mobile Subscriber International Subscriber

IDentity Number (MSISDN) =

Factory Serial Number (FSN) = D57217019751002

Modem Status = Online

Current Modem Temperature = 32 deg C, State = Normal

PRI SKU ID = 9993165, SKU Rev. = 1.0

Profile Information

====================

Profile 1 = INACTIVE*

--------

PDP Type = IPv4

Access Point Name (APN) = telstra.internet

Authentication = None

Username: , Password:

Profile 4 = INACTIVE

--------

PDP Type = IPv4

Access Point Name (APN) = telstra.internet

Authentication = None

Username: , Password:

* - Default profile

Data Connection Information

===========================

Data Transmitted = 0 bytes, Received = 0 bytes

Profile 1, Packet Session Status = INACTIVE

        Inactivity Reason = Normal inactivate state

Profile 2, Packet Session Status = INACTIVE

        Inactivity Reason = Normal inactivate state

Profile 3, Packet Session Status = INACTIVE

        Inactivity Reason = Normal inactivate state

Profile 4, Packet Session Status = INACTIVE

        Inactivity Reason = Normal inactivate state

Profile 5, Packet Session Status = INACTIVE

        Inactivity Reason = Normal inactivate state

Profile 6, Packet Session Status = INACTIVE

        Inactivity Reason = Normal inactivate state

Profile 7, Packet Session Status = INACTIVE

        Inactivity Reason = Normal inactivate state

Profile 8, Packet Session Status = INACTIVE

        Inactivity Reason = Normal inactivate state

Profile 9, Packet Session Status = INACTIVE

        Inactivity Reason = Normal inactivate state

Profile 10, Packet Session Status = INACTIVE

        Inactivity Reason = Normal inactivate state

Profile 11, Packet Session Status = INACTIVE

        Inactivity Reason = Normal inactivate state

Profile 12, Packet Session Status = INACTIVE

        Inactivity Reason = Normal inactivate state

Profile 13, Packet Session Status = INACTIVE

        Inactivity Reason = Normal inactivate state

Profile 14, Packet Session Status = INACTIVE

        Inactivity Reason = Normal inactivate state

Profile 15, Packet Session Status = INACTIVE

        Inactivity Reason = Normal inactivate state

Profile 16, Packet Session Status = INACTIVE

        Inactivity Reason = Normal inactivate state

Network Information

===================

Current Service Status = Normal, Service Error = None

Current Service = Combined

Packet Service = EDGE (Attached)

Packet Session Status = Inactive

Current Roaming Status = Home

Network Selection Mode = Manual

Country = AUS, Network = Telstra

Mobile Country Code (MCC) = 505

Mobile Network Code (MNC) = 1

Location Area Code (LAC) = 353

Routing Area Code (RAC) = 1

Cell ID = 21262

Primary Scrambling Code = 0

PLMN Selection = Manual

Registered PLMN =  , Abbreviated =

Service Provider = Telstra

Radio Information

=================

Radio power mode = ON

Current Band = GSM 900, Channel Number = 31

Current RSSI = -47 dBm

Band Selected = GSM all band

Modem Security Information

==========================

Card Holder Verification (CHV1) = Disabled

SIM Status = OK

SIM User Operation Required = None

Number of Retries remaining = 3

When I enable the ce0 interface and debug the chat script, I get this constantly

*Nov 20 03:57:30.727: %LINK-3-UPDOWN: Interface Cellular0, changed state to down

*Nov 20 03:57:40.727: CHAT3: Attempting async line dialer script

*Nov 20 03:57:40.727: CHAT3: Dialing using Modem script: INTERNET & System script: none

*Nov 20 03:57:40.727: CHAT3: process started

*Nov 20 03:57:40.727: CHAT3: Asserting DTR

*Nov 20 03:57:40.727: CHAT3: Chat script INTERNET started

*Nov 20 03:57:40.727: CHAT3: Sending string: ATDT*98*4#

*Nov 20 03:57:40.727: CHAT3: Expecting string: CONNECT

*Nov 20 03:57:40.739: CHAT3: Completed match for expect: CONNECT

*Nov 20 03:57:40.739: CHAT3: Chat script INTERNET finished, status = Success

*Nov 20 03:57:42.815: %LINK-3-UPDOWN: Interface Cellular0, changed state to up

*Nov 20 03:57:42.815: %DIALER-6-BIND: Interface Ce0 bound to profile Di2

*Nov 20 03:57:45.843: %LINK-5-CHANGED: Interface Cellular0, changed state to reset

*Nov 20 03:57:45.843: %DIALER-6-UNBIND: Interface Ce0 unbound from profile Di2

*Nov 20 03:57:50.919: %LINK-3-UPDOWN: Interface Cellular0, changed state to down

It *seems* to come up, but immediately drops out, and I can't figure out why.

Anyone got any hints/tips before I hit the TAC for help? hit me with the cluestick if you've got one!

Thanks!

2 Replies 2

Rick Morris
Level 6
Level 6

I have to be honest I have never set anything like this up before.  I just did a quick search and one of the sites I saw had a GSM profile set up.  Do you need something like that set up for authentication to the carrier?

No, there is no authentication on this SIM - doesn't need a username or password.

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