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AWAITING_ESTABLISHMENT...

snickered
Level 1
Level 1

I keep getting this when I do 'sh isdn status' on my AS5300. The only thing that fixes it that I've found is a reload of the entire system. What are some debugs that I can run to see what's going on?

11 Replies 11

Jaime Valencia
Cisco Employee
Cisco Employee

sh controllers T1

debug isdn q921

HTH

java

if this helps, please rate

HTH

java

if this helps, please rate

They went down again and I get this:

%CONTROLLER-5-LOOPSTATUS: Controller T1 3, PAYLOAD loopback request from external network

'show controller T1 3' gives me:

T1 3 is up. (Payload Loop by Remote)

Applique type is Channelized T1

Cablelength is long gain36 0db

Description:

Receiver has no alarms.

alarm-trigger is not set

Soaking time: 3, Clearance time: 10

AIS State:Clear LOS State:Clear LOF State:Clear

Version info of slot 0: HW: 4, PLD Rev: 0

Manufacture Cookie Info:

EEPROM Type 0x0001, EEPROM Version 0x01, Board ID 0x42,

Board Hardware Version 1.32, Item Number 73-2217-05,

Board Revision B16, Serial Number 09354209,

PLD/ISP Version 0.0, Manufacture Date 19-Jun-1998.

Framing is ESF, Line Code is B8ZS, Clock Source is Internal.

Data in current interval (256 seconds elapsed):

0 Line Code Violations, 0 Path Code Violations

23 Slip Secs, 0 Fr Loss Secs, 0 Line Err Secs, 0 Degraded Mins

23 Errored Secs, 0 Bursty Err Secs, 0 Severely Err Secs, 0 Unavail Secs

Data in Interval 1:

83 Line Code Violations, 551 Path Code Violations

41 Slip Secs, 18 Fr Loss Secs, 2 Line Err Secs, 1 Degraded Mins

43 Errored Secs, 0 Bursty Err Secs, 10 Severely Err Secs, 18 Unavail Secs

Data in Interval 2:

0 Line Code Violations, 0 Path Code Violations

0 Slip Secs, 0 Fr Loss Secs, 0 Line Err Secs, 0 Degraded Mins

0 Errored Secs, 0 Bursty Err Secs, 0 Severely Err Secs, 0 Unavail Secs

Data in Interval 3:

0 Line Code Violations, 0 Path Code Violations

0 Slip Secs, 0 Fr Loss Secs, 0 Line Err Secs, 0 Degraded Mins

0 Errored Secs, 0 Bursty Err Secs, 0 Severely Err Secs, 0 Unavail Secs

Data in Interval 4:

0 Line Code Violations, 0 Path Code Violations

0 Slip Secs, 0 Fr Loss Secs, 0 Line Err Secs, 0 Degraded Mins

0 Errored Secs, 0 Bursty Err Secs, 0 Severely Err Secs, 0 Unavail Secs

Data in Interval 5:

0 Line Code Violations, 0 Path Code Violations

0 Slip Secs, 0 Fr Loss Secs, 0 Line Err Secs, 0 Degraded Mins

0 Errored Secs, 0 Bursty Err Secs, 0 Severely Err Secs, 0 Unavail Secs

Data in Interval 6:

6 Line Code Violations, 0 Path Code Violations

0 Slip Secs, 0 Fr Loss Secs, 1 Line Err Secs, 0 Degraded Mins

0 Errored Secs, 0 Bursty Err Secs, 0 Severely Err Secs, 0 Unavail Secs

Total Data (last 6 15 minute intervals):

89 Line Code Violations, 551 Path Code Violations,

41 Slip Secs, 18 Fr Loss Secs, 3 Line Err Secs, 1 Degraded Mins,

43 Errored Secs, 0 Bursty Err Secs, 10 Severely Err Secs, 18 Unavail Secs

I can't find much on google about my situation :(

Does "shut / no shut" and controller T3 fixes it ?

After how long it happens ?

Which exact IOS are you running ?

I can't seem to recreate it yet so I can't really put a time to it. Right now it's been up for a couple hours. But earlier it happened about 10 minutes after I 'reload'. My IOS version is:

IOS (tm) 5300 Software (C5300-JK9S-M), Version 12.3(26), RELEASE SOFTWARE (fc2)

Another thing I'd like to point out is that the particular controllers that go down are connected to a proprietary conference bridge. A shut/no shut doesn't bring it up either.

interface Serial3:23

no ip address

encapsulation ppp

trunk-group BRIDGE 1

isdn switch-type primary-ni

isdn protocol-emulate network

isdn incoming-voice modem

no fair-queue

no cdp enable

end

controller T1 3

framing esf

linecode b8zs

pri-group timeslots 1-24

Those are the configurations I have.

Problem seems to be somewhat with the DS3 circuit, of course it's an anomaly that reloading fixes it. You can try upgrading IOS, latest 12.3 for example.

I am connected to the bridge with a T1 xover cable... no DS3 here. Also, AFAIK I'm on the latest IOS supported by the AS5300... 12.3(26).

Here's something interesting:

Apr 13 16:38:43 CDT: ISDN Se2:23 Q921: Net TX -> SABMEp sapi=0 tei=0

Apr 13 16:38:44 CDT: ISDN Se2:23 Q921: Net TX -> SABMEp sapi=0 tei=0

Apr 13 16:38:45 CDT: ISDN Se2:23 Q921: Net TX -> SABMEp sapi=0 tei=0

Apr 13 16:38:46 CDT: ISDN Se2:23 Q921: Net TX -> SABMEp sapi=0 tei=0

from http://www.cisco.com/en/US/tech/tk713/tk628/technologies_tech_note09186a00801509d7.shtml it says that if the router receives these messages it will Tx a UAf. Does that hold true for the opposite? If the router Tx a SABMEp should it Rx a UAf from my conference bridge?

Yes, a sabme elicits uaf. Is the bridge is providing clock ? Probably it is not, from the show controller something is wrong with that.

my guess is that the bridge doesn't provide the clock. That's why it's set to 'clock source internal'. It looks like this is the problem... I don't Rx a UAf and just keep Tx'ing SABMEp messages over and over.

I have tried to change it to 'clock source line primary' with no joy. How do I reset layer 2? When I do a shut/no shut on the interface it looks like it takes down layer 3 only.

What could be happening, is that the bridge sees too many errors and shuts down his port temporarily.

Shut under interface should bring layer 2 and 3 down. Shut under controller sets RAI bit, that is a clean way to bring down layer 1.

I can tell that the conference bridge hasn't shutdown the port. It even tries to use it but can't because "Requested circuit/channel not available". I'm going to investigate why the conference bridge doesn't reply to my SABME messages... that has to be the reason it won't get to MULTIPLE_FRAME_ESTABLISHED.

If you have any other suggestions it would be greatly appreciated.

I also receive this:

Apr 13 18:11:11 CDT: ISDN Se2:23 Q921: Net RX <- RRp sapi=0 tei=0 nr=4

from the conference bridge. So, it seems that it's sending something... just not the UAf. Does this indicate anything that you know of?

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