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Community Member

E1 controller, cisco 1841....

Hi,

My cisco 1841 router does not respond anything to the command 'sho controllers e1'. It shows a 'serial 1T WAN daughter card, WIC-1T' as the result of 'sho diag' command. Recently an E1 link has been terminated on this interface but 'sho int ser0/0/0' shows 1544kbps bandwidth. Moreover, the later command also shows 'total available bandwidth 1148 kbps' as one of the line out of all the lines of the command output. We have ordered this E1 in Hong kong, just in case it has anything to do with location.

find the attachment.

Kindly assist.

Gaurav

1 ACCEPTED SOLUTION

Accepted Solutions
Hall of Fame Super Bronze

Re: E1 controller, cisco 1841....

In order to have a T1 controller, you need an internal CSU/DSU.

You have a regular serial card and if you want information from that card, the command show controller s0/0/0 is what you are after.

16 REPLIES
Hall of Fame Super Bronze

Re: E1 controller, cisco 1841....

You have the wrong module, contact your Cisco reseller for a module swap.

HTH,

__

Edison.

Community Member

Re: E1 controller, cisco 1841....

Thanks for the valuable advice. Can you please suggest some correct module/card which may suffice my requirements?

Thanks in advance...!

Hall of Fame Super Bronze

Re: E1 controller, cisco 1841....

Community Member

Re: E1 controller, cisco 1841....

thanks again, sir.

Just one more question: how did you come to know that the module is not compatible? If the 'sho controllers e1/t1' command does not show anything, does this prove that the controller/module is not compatible?

thanks again..!

Hall of Fame Super Bronze

Re: E1 controller, cisco 1841....

It's not is not compatible but you have the wrong module for your task. A T1 is used in North America and the E1 is used in Europe and other countries such as in your case Hong Kong.

You had to have a module with E1 on it. The one you have only support T1 connection.

Take a moment and read this document for E1:

http://en.wikipedia.org/wiki/E-carrier

and this document for T1:

http://en.wikipedia.org/wiki/Digital_Signal_1

Community Member

Re: E1 controller, cisco 1841....

Edison, kindly tell- does the blank-output of command 'sho controllers e1' hold any significance, because for rest of the sites (all USA) the corresponding routers show everything about the t1 controllers attached.

just another confusion, you have already resolved my main problem though.

gaurav

Hall of Fame Super Bronze

Re: E1 controller, cisco 1841....

The command 'sho controllers e1' will return information only if you have the physical controller installed on the device. If you don't, it returns with no value.

Community Member

Re: E1 controller, cisco 1841....

But, Edison, I'm not getting any output for 'show controllers t1' either. According to you this controller is T1-controller so my router should show the t1-controller details for 'show controllers t1', which this does not show. Kindly advice.

Thanks in advance.

gaurav

Community Member

Re: E1 controller, cisco 1841....

VWIC2-1MFT-T1/E1

watch out for loads of dead on arrivals for this module.

Cisco will remove this post/

Community Member

Re: E1 controller, cisco 1841....

thanks buddy.. but my question still remians...

why does the t1 controller not responding to 'show controllers t1', though corresponding serial interface is showing a lot of stuff for 'show controllers ser0/0/0'?

Kindly let me know where am I wrong if at all I'm.

Hall of Fame Super Bronze

Re: E1 controller, cisco 1841....

Please post the output from typing show tech

Community Member

Re: E1 controller, cisco 1841....

plz find attached the 'sho tech' output.

Hall of Fame Super Bronze

Re: E1 controller, cisco 1841....

In order to have a T1 controller, you need an internal CSU/DSU.

You have a regular serial card and if you want information from that card, the command show controller s0/0/0 is what you are after.

Community Member

Re: E1 controller, cisco 1841....

Now the problem needs to be revisited as till now I was under impression that I have a wrong module, but now as i've realized that it is a normal serial card with CSU/DSU external to the router, kindly assist me in knowing whether it is problem with our end or Service provider end. Service provider though says that they have configured the E1 frame-relay correctly, evenif sho int se0/0/0 shows the BW of T1. You can see that in 'show tech' output attached.

Thanks for the responses.

Gaurav

Hall of Fame Super Bronze

Re: E1 controller, cisco 1841....

The bandwidth is inherit from the type of card. This is a WIC-1T so automatically assumes you have a T1 CSU/DSU connected to it. You can change the bandwidth with the bandwidth command under the interface.

However, this affects only dynamic routing protocols or QoS, it does not reflect the actual speed of the line. The external CSU/DSU is the one where the real configuration takes place.

Community Member

Re: E1 controller, cisco 1841....

Thanks again for the help..

--gaurav

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