Layer 2 problem with E1 Controller

Unanswered Question
May 18th, 2009

Hi

I have Cisco 3800 router with 2 port E1 controller card ,problem i have is that the 1 port on the controller works fine ,but the other port keeps giving me a TEI_ASSIGNED status when i do a sh isdn stat ,after running Q921 debugs i can see that my router is not responding to SABME messages from the Telco ,any idea what the problem might be ?

I have this problem too.
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iptuser55 Mon, 05/18/2009 - 04:52

Have you checked the line type -Qsig, DMS etc, CRC4 on/off, Clocking etc. What about the number of channels, . Can you connect the "good circuit" to the faulty port ?

rynard.coetzee Tue, 05/19/2009 - 00:33

Here are the configs from the router ,also when i connect the good circuit to the faulty port the same situation occurs

network-clock-participate wic 1

network-clock-select 1 E1 0/1/0

network-clock-select 2 E1 0/1/1

controller E1 0/1/0

pri-group timeslots 1-31 service mgcp

!

controller E1 0/1/1

pri-group timeslots 1-31 service mgcp

interface Serial0/1/0:15

no ip address

encapsulation hdlc

isdn switch-type primary-net5

isdn incoming-voice voice

isdn bind-l3 ccm-manager

no cdp enable

!

interface Serial0/1/1:15

no ip address

encapsulation hdlc

isdn switch-type primary-net5

isdn overlap-receiving

isdn incoming-voice voice

isdn bind-l3 ccm-manager

isdn sending-complete

no cdp enable

rynard.coetzee Tue, 05/19/2009 - 00:37

Here are the outputs from sh controllers e1 and sh isdn status ,the 0/1/1 is the faulty port

XXXX#sh controllers e1

E1 0/1/0 is up.

Applique type is Channelized E1 - balanced

Cablelength is Unknown

No alarms detected.

alarm-trigger is not set

Version info Firmware: 20071011, FPGA: 13, spm_count = 0

Framing is CRC4, Line Code is HDB3, Clock Source is Line.

Data in current interval (280 seconds elapsed):

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

Total Data (last 24 hours)

16391 Line Code Violations, 16 Path Code Violations,

0 Slip Secs, 1 Fr Loss Secs, 2 Line Err Secs, 0 Degraded Mins,

0 Errored Secs, 0 Bursty Err Secs, 2 Severely Err Secs, 8 Unavail Secs

E1 0/1/1 is up.

Applique type is Channelized E1 - balanced

Cablelength is Unknown

No alarms detected.

alarm-trigger is not set

Version info Firmware: 20071011, FPGA: 13, spm_count = 0

Framing is CRC4, Line Code is HDB3, Clock Source is Line.

Data in current interval (282 seconds elapsed):

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

Total Data (last 24 hours)

2138015 Line Code Violations, 49 Path Code Violations,

83 Slip Secs, 4 Fr Loss Secs, 8 Line Err Secs, 0 Degraded Mins,

81 Errored Secs, 0 Bursty Err Secs, 7 Severely Err Secs, 647 Unavail Secs

XXXXX#sh isdn stat

Global ISDN Switchtype = primary-net5

%Q.931 is backhauled to CCM MANAGER 0x0003 on DSL 0. Layer 3 output may not apply

ISDN Serial0/1/0:15 interface

dsl 0, interface ISDN Switchtype = primary-net5

L2 Protocol = Q.921 0x0000 L3 Protocol(s) = CCM MANAGER 0x0003

Layer 1 Status:

ACTIVE

Layer 2 Status:

TEI = 0, Ces = 1, SAPI = 0, State = MULTIPLE_FRAME_ESTABLISHED

Layer 3 Status:

0 Active Layer 3 Call(s)

Active dsl 0 CCBs = 0

The Free Channel Mask: 0xFFFF7FFF

Number of L2 Discards = 0, L2 Session ID = 25

%Q.931 is backhauled to ME 0x0700 on DSL 1. Layer 3 output may not apply

ISDN Serial0/1/1:15 interface

dsl 1, interface ISDN Switchtype = primary-net5

L2 Protocol = Q.921 0x0000 L3 Protocol(s) = CCM MANAGER 0x0003

Layer 1 Status:

ACTIVE

Layer 2 Status:

TEI = 0, Ces = 1, SAPI = 0, State = TEI_ASSIGNED

Layer 3 Status:

0 Active Layer 3 Call(s)

Active dsl 1 CCBs = 0

The Free Channel Mask: 0xFFFF7FFF

Number of L2 Discards = 0, L2 Session ID = 3

Total Allocated ISDN CCBs = 0

Paolo Bevilacqua Tue, 05/19/2009 - 08:20

Both ports are experiencing slip errors.

configure:

network-clock-participate wic 0

network-clock-select 1 e1 0/0/0

network-clock-select 2 e1 0/0/1

controller e1 0/0/0

clock source line primary

And check if any improvement.

Also try swapping circuites to interface, see if problem stays with port or circuit.

rynard.coetzee Tue, 05/19/2009 - 22:52

I have configured the clock source line primary command under the controller ,but still no change. I have also tried swapping the circuits ,the problem stays with the port.

rynard.coetzee Tue, 05/19/2009 - 23:14

Oops ,i found the problem guys ,sorry it was my own stupidity ,i had forgotten to configure the port in CUCM ,so it had a blank config in CUCM.

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