Re: EHWIC-3G-HSPA+7 in Cisco 2901

paul_au1234 · ‎11-16-2012

Hi all,

I tried to configure HSPA+7 module in Cisco 2901. After configure profile and setting, it prompted the following console message and no further debug message for chat nor modem.

Can anyone advise it?

Thansk!

Paul Au

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

Nov 17 04:54:36.243: %LINK-3-BADENCAP: Interface Cellular0/0/0, Bad encapsulation code (30) -Process= "Exec", ipl= 0, pid= 3

-Traceback= 22B7F5E8z 225F6398z 22B5DE9Cz 22B5F028z 22B5F338z 22B5F3A4z 22EC67F4

z 22BA1EB8z 22BA29A4z 22BA36C0z 22BA3B00z 22BA7420z 2248D858z 2248D9FCz 22B332D8

z 2248C668z

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

Running configuration:

chat-script gsm "" "AT!SCACT=1,1" TIMEOUT 60 "OK"

crypto pki token default removal timeout 0

!

license udi pid CISCO2901/K9 sn FGL162521NK

!

controller Cellular 0/0

!

interface Embedded-Service-Engine0/0

no ip address

no ip route-cache

shutdown

!

interface GigabitEthernet0/0

ip address 10.0.1.5 255.0.0.0

no ip route-cache

duplex auto

speed auto

no mop enabled

!

interface GigabitEthernet0/1

no ip address

no ip route-cache

shutdown

duplex auto

speed auto

!

interface Cellular0/0/0

ip address negotiated

encapsulation slip

no ip route-cache

dialer in-band

dialer string gsm

dialer-group 1

async mode interactive

!

interface Cellular0/0/1

no ip address

encapsulation slip

no ip route-cache

!

ip forward-protocol nd

!

no ip http server

no ip http secure-server

!

ip route 0.0.0.0 0.0.0.0 Cellular0/0/0

!

access-list 1 permit any

dialer-list 1 protocol ip list 1

!

control-plane

!

line con 0

line aux 0

line 2

no activation-character

no exec

transport preferred none

transport input all

transport output pad telnet rlogin lapb-ta mop udptn v120 ssh

stopbits 1

line 0/0/0

exec-timeout 0 0

script dialer gsm

modem InOut

no exec

line 0/0/1

no exec

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

Muhammad Thanveer · ‎11-16-2012

Hi Paul,

Please find some explanation reg the bug

Link

http://www.cisco.com/en/US/docs/ios/11_2/system/message/esgrip.html

LINK Error Messages

Data link error messages


 
Error Message

%LINK-3-BADENCAP: Interface [chars] Bad encapsulation 
code [dec]

Explanation The lower level software was unable to write a MAC header for a datagram. A probable cause is configuration error.

Recommended Action Copy the error message exactly as it appears, and report it to your technical support representative.

Link:

http://www.cisco.com/en/US/docs/ios/system/messages/guide/sm_cn06.html http://www.cisco.com/en/US/docs/ios/11_2/system/message/esgrip.html

Error Message

%LINK-3-BADENCAP : Interface %s, Bad encapsulation code (%d)

Explanation The lower level software was unable to write a MAC header for a datagram. A probable cause is configuration error.

Recommended Action Copy the message exactly as it appears on the console or in the system log. Research and attempt to resolve the issue using the tools and utilities provided at http://www.cisco.com/cisco/web/support/index.html. With some messages, these tools and utilities will supply clarifying information. Also perform a search of the Bug Toolkit http://www.cisco.com/pcgi-bin/Support/Bugtool/home.pl. If you still require assistance, open a case with the Technical Assistance Center via the Internet http://tools.cisco.com/ServiceRequestTool/create/, or contact your Cisco technical support representative and provide the representative with the gathered information.

Please rate the helpful posts

Regards
Thanveer
"Everybody is genius. But if you judge a fish by its ability to climb a tree, it will live its whole life believing that it is a stupid."

paul_au1234 · ‎11-16-2012

Hi Thanveer ,

Thanks very much for your reply.

From below explanation, it seems it was cause by configuration error. As I am new to Cisco router, do u think something wrong in the configuration?

Thanks!
Paul Au

#

Explanation The lower level software was unable to write a MAC header for a datagram. A probable cause is configuration error.

#

Muhammad Thanveer · ‎11-17-2012

Hi Paul,

Please follow the following steps

Configuring the Cellular Interface (HSPA+7)

To configure the cellular interface, enter the following commands in the cellular interface mode.

SUMMARY STEPS

1. configure terminal

2. interface cellular unit

3. encapsulation slip

4. asynchronous mode interactive

5. ip address negotiated

DETAILED STEPS


	Command or Action	Purpose
Step 1	router# configure terminal Example: router# configure terminal	Enters global configuration mode from the terminal.
Step 2	router(config)# interface cellular unit Example: router(config)# interface cellular 0/0/0	Specifies the cellular interface. Note Interface cellular 0/0/0 is for PDP 1 Interface cellular 0/0/1 is for PDP 2 Multiple PDP contexts are applicable only to HSPA HWICs.
Step 3	router(config-if)# encapsulation slip Example: router(config-if)# encapsulation slip	Specifies slip encapsulation for an interface configured for dedicated asynchronous mode or dial-on-demand routing (DDR).
Step 4	router(config-if)# async mode interactive Example: router(config-if)# async mode interactive	Returns a line that has been placed into dedicated asynchronous network mode to interactive mode, thereby enabling the SLIP and PPP commands in the privileged EXEC mode.
Step 5	router(config-if)# ip address negotiated Example: router(config-if)# ip address negotiated	Specifies that the IP address for a particular interface is obtained via PPP/IPCP address negotiation.

Note When a static IP address is required for the cellular interface, the address may be configured as ip address negotiated. During IPCP, the network ensures that the correct static IP address is allocated to the device. If a tunnel interface is configured with ip address unnumbered , it is necessary to configure the actual static IP address under the cellular interface, in place of ip address negotiated. For a sample cellular interface configuration, see the "Basic Cellular Interface Configuration (HSPA+7)" section.

Configuring DDR

To configure DDR for the cellular interface, follow these steps.

SUMMARY STEPS

1. configure terminal

2. interface cellular unit

3. dialer in-band

4. dialer idle-timeout

5. dialer string

6. dialer group

7. exit

8. dialer-list protocol {permit | deny | list | access-group}>

9. ip access-listpermit

10. line unit

11. script dialer

12. exit

13. chat-script

Muhammad Thanveer · ‎11-17-2012

Hey Paul,

Wise suggession is to raise a TAC with Cisco.

Thanks

Thanveer