01-27-2011 10:33 AM - edited 03-04-2019 11:13 AM
Hi!
I'm trying to configure Cisco CISCO881G-K9 3G router to connect to mobile network without success. The cellular interface gets up but it doesn't receive IP address
It seems that profile isn't activated and it should've been. Am I right?
I've attached running config and some other information gathered from router.
Any idea?
Regards,
Jernej
Solved! Go to Solution.
02-01-2011 12:38 AM
Hello Jernej,
You need to use the dailer interface ( in your running config i was not able to see the dailer config section) please use the below template to complete the config
multilink bundle-name authenticated
chat-script internet "" "ATDT*98*1#" TIMEOUT 60 "CONNECT"
interface Cellular0
no ip address
ip virtual-reassembly
encapsulation ppp
dialer in-band
dialer pool-member 2
dialer-group 2
async mode interactive
!
interface Dialer2
ip address negotiated
encapsulation ppp
dialer pool 2
dialer idle-timeout 0
dialer string internet
dialer persistent
dialer-group 2
no cdp enable
ppp chap hostname dummy (just put one name)
ppp chap password 0 dummytest (just put something)
ppp ipcp dns request
!
line con 0
login local
no modem enable
line aux 0
line 3
script dialer internet
no exec
rxspeed 7200000
txspeed 2000000
line 4
exec-timeout 0 0
timeout login response 0
privilege level 0
modem answer-timeout 0
modem dtr-delay 0
activation-character 0
exec-character-bits 8
special-character-bits 8
no exec
length 0
width 0
no history
no editing
transport preferred none
transport input none
transport output none
escape-character soft 0
escape-character 0
no ip tcp input-coalesce-threshold
callback forced-wait 0
callback nodsr-wait 0
stopbits 1
speed 115000
Try these and update.. Thanks | Sudheesh ( Rate me if this useful)
01-27-2011 11:50 PM
Hi Jernej,
You need to change the PDP Type under the profile, from PPP to IPv4.
See this doc for reference:
https://supportforums.cisco.com/docs/DOC-14786
Cheers
Marco
* If this was useful, please rate *
01-28-2011 12:00 PM
Hi!
Thanks for the tip.
I've changes the PDP Type as suggested but it didn't resolve the problem:
sh cellular 0 all shows now:
Profile Information
====================
Profile 1 = INACTIVE*
--------
PDP Type = IPv4
Access Point Name (APN) = internet
Authentication = CHAP
Username: mobitel, Password: internet
sh interface cellular 0
Cellular0 is up (spoofing), line protocol is up (spoofing)
Hardware is 3G Modem-HSPA/UMTS/EDGE/GPRS-850/900/1800/1900/2100MHz / Global
Internet address will be negotiated using IPCP
MTU 1500 bytes, BW 5760 Kbit/sec, DLY 100000 usec,
reliability 255/255, txload 1/255, rxload 1/255
Encapsulation PPP, LCP Closed, loopback not set
debug cellular messages all shows only these repeating events, nothing else:
*Jan 28 19:56:27.183: [Cellular0]:MGMT RX (HEARTBEAT) (14 bytes):
00 0A 6B 03 00 00 07 00 00 00 00 00 00 00
*Jan 28 19:56:28.127: [Cellular0]:MGMT RX (RSCP_ECIO) (24 bytes):
doesn't show any activity at all..
Any idea?
01-31-2011 06:47 AM
Hi Jernej,
If you don't see any debug, it means that the communication between IOS and modem is not happening.
I see that the line configuration has some missing parts, e.g. "modem inout", which allows IOS and modem to talk each other.
Can you please test this configuration?
line 3
exec-timeout 0 0
script dialer internet
login
modem InOut
no exec
transport preferred all
transport input all
transport output all
Let me know if this works.
Cheers
Marco
01-31-2011 08:47 AM
Hi Marco!
I tested your configuration but it didn't help - nothing changed.
There are two things I would like to mention:
- "transport preferred" only supports "ssh" and "telnet" but not "all"
- I had to set up line password before I could run "login" command
I've attached more detailed information if you have any clue what else could be the problem.
Thank you for all your help!
Jernej
01-31-2011 11:10 PM
Hi Jernej,
still not coming up, this is disappointing
Instead of debug cellular, can you enable only:
- debug chat
- debug dialer
- debug ppp nego
Then start a ping that triggers the cellular interface.
One question: I see that the output of "show cellular all" is truncated, there is a long part missing. Did you cut it by mistake, or is the full output so short?
The parts about network and radio signal are missing. Can you try to collect it again?
Cheers
Marco
02-01-2011 12:38 AM
Hello Jernej,
You need to use the dailer interface ( in your running config i was not able to see the dailer config section) please use the below template to complete the config
multilink bundle-name authenticated
chat-script internet "" "ATDT*98*1#" TIMEOUT 60 "CONNECT"
interface Cellular0
no ip address
ip virtual-reassembly
encapsulation ppp
dialer in-band
dialer pool-member 2
dialer-group 2
async mode interactive
!
interface Dialer2
ip address negotiated
encapsulation ppp
dialer pool 2
dialer idle-timeout 0
dialer string internet
dialer persistent
dialer-group 2
no cdp enable
ppp chap hostname dummy (just put one name)
ppp chap password 0 dummytest (just put something)
ppp ipcp dns request
!
line con 0
login local
no modem enable
line aux 0
line 3
script dialer internet
no exec
rxspeed 7200000
txspeed 2000000
line 4
exec-timeout 0 0
timeout login response 0
privilege level 0
modem answer-timeout 0
modem dtr-delay 0
activation-character 0
exec-character-bits 8
special-character-bits 8
no exec
length 0
width 0
no history
no editing
transport preferred none
transport input none
transport output none
escape-character soft 0
escape-character 0
no ip tcp input-coalesce-threshold
callback forced-wait 0
callback nodsr-wait 0
stopbits 1
speed 115000
Try these and update.. Thanks | Sudheesh ( Rate me if this useful)
02-01-2011 11:42 AM
It works now.
Thank you very much Marco and Sudheesh for all your help!
Jernej
This is my working configuration (the problematic part):
interface Cellular0
no ip address
ip nat outside
ip virtual-reassembly
encapsulation ppp
dialer in-band
dialer pool-member 1
dialer-group 1
async mode interactive
!
interface Dialer1
ip address negotiated
ip nat outside
ip virtual-reassembly
encapsulation ppp
dialer pool 1
dialer idle-timeout 0
dialer string internet
dialer persistent
dialer-group 1
ppp chap hostname dummy
ppp chap password 0 dummytest
ppp ipcp dns request
no cdp enable
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