From: robbie (robbie@packetized.org)
Date: Sun Oct 17 2004 - 23:09:44 GMT-3
Coming in on the end of this long (and detailed) discussion, I can say
that as a matter of personal experience, I have seen this many, many
times in the field, usually due to the misconfig of an ISDN switch, or
perhaps a dying BR1TE/SL1C. I would not at all consider this an unusual
error. And almost invariably, it is without a doubt a problem with the
provider equipment, and not CPE.
robbie
Brian McGahan wrote:
> Matt,
>
> Before you shut/no shut or reload, try a "clear interface bri0".
> Like I mentioned in class, the method that you used led you to the
> conclusion that it was in fact a problem with the ISDN switch. Using
> this type of method gives you more firepower when presenting the problem
> to the proctor, as you can say I tried a,b,c and d, and it still doesn't
> work. The lack of a layer 3 configuration (you don't need an IP address
> BTW) is indicative that the problem relies at layer 2.
>
>
> HTH,
>
> Brian McGahan, CCIE #8593
> bmcgahan@internetworkexpert.com
>
> Internetwork Expert, Inc.
> http://www.InternetworkExpert.com
> Toll Free: 877-224-8987 x 705
> Outside US: 775-826-4344 x 705
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>
>
>>-----Original Message-----
>>From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf
>
> Of
>
>>Matthew Seppeler
>>Sent: Sunday, October 17, 2004 11:58 AM
>>To: ccielab@groupstudy.com
>>Subject: "ESTABLISH_AWAITING_TEI" ISDN error message
>>
>>ISDN is probably one of the most quirky things I had the pleasure of
>>dealing with in preparing for the R&S exam. However, thanks to the
>
> help
>
>>of the Brian McGahan with Internetwork Experts and the Mock Lab class
>
> I
>
>>took the other week, I've settled into an almost foolproof way of
>>minimizing the headaches of configuring ISDN. If you are in the final
>>stretch in preparing for the lab, it's a class well worth the money.
>>
>>
>>
>>The basis for this email is to point out a case where it was required
>
> to
>
>>reload the ISDN switch in getting ISDN layer 2 working. Below are the
>>steps I followed in configuring ISDN with the minimal configuration
>>needed to get to this point of configuration:
>>
>>
>>
>>1) Shut down the BRI interface.
>>
>>2) Assigned an IP address to the interface.
>>
>>3) Assigned the ISDN switch type to the interface.
>>
>>4) Assigned the spids if required. In this case, yes as we are
>>using basic-ni.
>>
>>5) No shut on the BRI interface.
>>
>>6) Verified Layer 2 connectivity with the show ISDN status. You
>>should see "multiple frame stabled" with "valid" spids.
>>
>>7) Run the command "isdn test call int b0/0 string" to test that
>>the circuit comes up.
>>
>>
>>
>>If after running all these steps, this will verify that the ISDN
>
> switch
>
>>is indeed ok. Any further issues with ISDN will be a result of the
>>config as extra stuff is added.
>>
>>
>>
>>Well, it looks like I found one of those rare cases that the ISDN
>
> switch
>
>>is to blame. Nope, it was not due to wrong spids or switch type.
>
> Even
>
>>after I did a reload on the router, I was still not able to get ISDN
>>layer 2 connectivity up and working with the basic step followed
>
> above.
>
>>
>>
>>
>>The error message when doing a "show isdn status" shows that the Layer
>
> 2
>
>>status shows as "ESTABLISH_AWAITING_TEI" or "await establishment"
>
> along
>
>>with invalid spids. I kid you not, all I had to do to resolve this
>>issue was to reload the ISDN switch. Fortunately, the rack I was on
>>gives you access to reload the ISDN switch. This is not my own rack
>
> to
>
>>add. It was rented from RackTimeRentals and is one of the reasons why
>
> I
>
>>like using their racks. Great job Bill with providing this feature
>
> for
>
>>our use!
>>
>>
>>
>>Being that I've run into this problem before, I was quick enough to
>
> log
>
>>my config for my configuration steps as well as steps taken to resolve
>>this issue. Below is input if you wish to review in further detail:
>
>
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