Cisco 1841 with 3G HWIC and 3G ISP
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09-17-2024 06:11 AM - edited 09-17-2024 06:12 AM
Hi to all ,
i am trying to figure out why i can't have a cellular connection to my ISP , although having already read and tried various commands from different threads and sites.
My config is pretty simple :
interface FastEthernet0/0
ip address 192.168.1.1 255.255.255.0
ip nat inside
ip virtual-reassembly
duplex auto
speed auto
!
interface Cellular0/0/0
ip address negotiated
ip nat outside
ip virtual-reassembly
encapsulation ppp
dialer in-band
dialer idle-timeout 0
dialer string gsm
dialer-group 1
ppp authentication chap pap
ppp chap hostname <--omitted-->
ppp chap password 0 <---omitted-->
ppp pap sent-username interface Cellular0/0/0
ppp ipcp dns request
i
dialer-list 1 protocol ip permit
ip route 0.0.0.0 0.0.0.0 Cellular0/0/0
ip nat inside source list NAT interface Cellular0/0/0 overload
The problem is that the cellular interface does not come up.
I have finally configured in the GSM modem the following two commands:
cellular 0/0/0 gsm profile create 1 internet.static <--- This is given by my provider
and finally unlocked my SIM card:
cellular 0/0/0 gsm sim unlock 7892
The show command on cellular 0/0/0 profile shows :
Router#show cellular 0/0/0 profile 1
Profile 1 = INACTIVE*
--------
PDP Type = IPv4
Access Point Name (APN) = internet.static
Authentication = None
Username: , Password:
* - Default profile
and:
Router#sh int cellular 0/0/0
Cellular0/0/0 is up (spoofing), line protocol is up (spoofing)
Hardware is HSDPA/UMTS/EDGE/GPRS-850/900/1800/1900/2100MHz
Internet address will be negotiated using IPCP
MTU 1500 bytes, BW 9 Kbit/sec, DLY 100000 usec,
reliability 255/255, txload 1/255, rxload 1/255
Encapsulation PPP, LCP Closed, loopback not set
Keepalive not supported
Last input never, output never, output hang never
Last clearing of "show interface" counters 00:28:31
Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 0
Queueing strategy: weighted fair
Output queue: 0/1000/64/0 (size/max total/threshold/drops)
Conversations 0/0/16 (active/max active/max total)
Reserved Conversations 0/0 (allocated/max allocated)
Available Bandwidth 6 kilobits/sec
5 minute input rate 0 bits/sec, 0 packets/sec
5 minute output rate 0 bits/sec, 0 packets/sec
0 packets input, 0 bytes, 0 no buffer
Received 0 broadcasts, 0 runts, 0 giants, 0 throttles
0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored, 0 abort
0 packets output, 0 bytes, 0 underruns
0 output errors, 0 collisions, 0 interface resets
0 unknown protocol drops
0 unknown protocol drops
0 output buffer failures, 0 output buffers swapped out
0 carrier transitions
DCD=up DSR=up DTR=up RTS=up CTS=up
Any ideas why it does not connect to the ISP?
Thanks,
Ditter.
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09-17-2024 07:17 AM
hey there. from show cell 0/0/0 profile, I can see that the profile is marked Inactive. This could indicate an issue with the profile activation.
So try this: cellular 0/0/0 gsm activate profile 1 and then check again with show cell 0/0/0 profi 1.
Other stuff that you can check are: APN, Diales and ppp negotiation, Sim card and network issues, also signal strength/. But while u there, check nat config also.
hope this will help!
-Enes
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09-17-2024 07:43 AM
Hi Enes
thanks for the reply
but there is no command to activate a profile on a cisco 1841 ((C1841-IPBASEK9-M), Version 12.4(24)T)
What i mean:
Router#cellular 0/0/0 gsm ?
band GSM Bands
plmn PLMN Commands
profile Profile management commands
sim SIM card lock/unlock commands
Router#cellular 0/0/0 gsm profile ?
create Create/Edit a Profile
delete Delete a profile
Thanks.
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09-17-2024 08:38 AM
d*mn I forgot how old this device is, my bad. I'll check some documentation and also try to get this router image so I can lab some scenarios...
-Enes
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