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DS3 bwtween router 3845 and 7206 VXR

1. I have a router 3845, ver 12.4(3g) with 1 subrate t3/e3 port "NM-1T3/E3"

2. At the other end, there is a Router 7206 VXR ver 12.4 with a One-port PA-T3 module.

I configured both routers T3 cards, I can not have the link to come up.

My ISP says they are getting AIS from my router 3845 device, I have the BNC coax cable replaced but I'm still getting AIS at my 7206 VXR

Help help help.

1 ACCEPTED SOLUTION

Accepted Solutions
Hall of Fame Super Gold

Re: DS3 bwtween router 3845 and 7206 VXR

Beside the good advice given by engagerocks, when a controller show loss of signal, circuit is dead. Only choice is to swap tx/rx BNC's, if no changes, circuit is faulty.

Note: I'm not 100% positive that all DS3's are provisione with "floating clock", that the need to provide your own on one side.

7 REPLIES
Hall of Fame Super Gold

Re: DS3 bwtween router 3845 and 7206 VXR

Please send "show controller t3" taken on both routers or least your one.

New Member

Re: DS3 bwtween router 3845 and 7206 VXR

!. The PA-T3 is in the slot 5, but when I issued sh controller t3, it only show the module in slot 6.

but this is the information

I issued show controller in other the have the " One port PA-T3+" card listed.

From 7206

MPLS-RT1>enable

Password:

MPLS-RT1#sh contr t3

T3 6/0 is up. Hardware is CT3 single wide port adapter

CT3 H/W Version : 1.0.1, CT3 ROM Version : 1.1, CT3 F/W Version : 2.4.3

FREEDM version: 1, reset 0 resurrect 0

Applique type is Channelized T3

Description: T3 Point-to-Multipoint

No alarms detected.

Framing is M23, Line Code is B3ZS, Clock Source is Internal

Rx-error throttling on T1's ENABLED

Rx throttle total 269, equipment customer loopback

Data in current interval (109 seconds elapsed):

0 Line Code Violations, 0 P-bit Coding Violation

0 C-bit Coding Violation, 0 P-bit Err Secs

0 P-bit Severely Err Secs, 0 Severely Err Framing Secs

0 Unavailable Secs, 0 Line Errored Secs

0 C-bit Errored Secs, 0 C-bit Severely Errored Secs

Total Data (last 24 hours)

0 Line Code Violations, 0 P-bit Coding Violation,

0 C-bit Coding Violation, 0 P-bit Err Secs,

0 P-bit Severely Err Secs, 0 Severely Err Framing Secs,

0 Unavailable Secs, 0 Line Errored Secs,

0 C-bit Errored Secs, 0 C-bit Severely Errored Secs

T1 1 is down

timeslots: 1-24

FDL per AT&T 54016 spec.

Transmitter is sending LOF Indication.

Receiver is getting AIS.

Framing is ESF, Clock Source is Line

Data in current interval (108 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

108 Unavail Secs, 0 Stuffed Secs

Total Data (last 24 hours)

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

86400 Unavail Secs, 0 Stuffed Secs

T1 2 is up0 86400 Unavail Secs, 0 Stuffed Secs

MPLS-RT1#

M1T-T3+ pa: show controller:

PAS unit 29, subunit 0, f/w version 3-93, rev ID 0x2800001, version 3

idb = 0x65646F20, ds = 0x6567CA1C, ssb=0x646CBB6C

Clock mux=0x30, ucmd_ctrl=0x0, port_status=0x0

Serial config=0x8, line config=0x1B0202

maxdgram=4584, bufpool=128Kb, 256 particles

rxLOS inactive, rxLOF inactive, rxAIS active

txAIS inactive, rxRAI inactive, txRAI active

line state: down

cable type : T3 cable, received clockrate 44201430

, tx_head=0, tx_tail=0, tx_count=0

throttled=0, enabled=0

halted=0, last halt reason=0

Microcode fatal errors=02134777557Unavailable "

"

Transmitter is sending remote alarm.

Receiver is getting AIS.

From the 3845

Authorized access only!

Disconnect IMMEDIATELY if you are not an authorized user!

COL-RT1#

COL-RT1#sh contr t3

T3 1/0 is down.

Applique type is Subrate T3

Transmitter is sending remote alarm.

Receiver has loss of signal.

MDL transmission is disabled

FEAC code received: DS3 AIS Received

Framing is C-BIT Parity, Line Code is B3ZS, Clock Source is Internal

Data in current interval (590 seconds elapsed):

0 Line Code Violations, 0 P-bit Coding Violation

0 C-bit Coding Violation, 0 P-bit Err Secs

0 P-bit Severely Err Secs, 0 Severely Err Framing Secs

590 Unavailable Secs, 0 Line Errored Secs

0 C-bit Errored Secs, 0 C-bit Severely Errored Secs

Total Data (last 24 hours)

0 Line Code Violations, 0 P-bit Coding Violation,

0 C-bit Coding Violation, 0 P-bit Err Secs,

0 P-bit Severely Err Secs, 0 Severely Err Framing Secs,

86400 Unavailable Secs, 0 Line Errored Secs,

0 C-bit Errored Secs, 0 C-bit Severely Errored Secs

COL-RT1#

Silver

Re: DS3 bwtween router 3845 and 7206 VXR

is this a point to point ds3?

if so, make sure one side is DCE and the other is DTE.

You need one side to provide the clocking and the other to received the clocking from the network/line.

Make sure you have the TX side of the BNC in the TX side of the card. If they are not in the correct connector you will get AIS. You could also ask your telco to work with you by you providing a loop for them, take a connector and put the RX to the TX of the cable and loop it back to the Telco to verify the cable before it goes into your router.

New Member

Re: DS3 bwtween router 3845 and 7206 VXR

It is a p2p ds3.

what command I will ust to have "let say" 7206 VXR to be DCE and the 3845 to be the DTE.

Thanks

Silver

Re: DS3 bwtween router 3845 and 7206 VXR

MPLS-RT1#sh contr t3

Framing is M23, Line Code is B3ZS, Clock Source is Internal

COL-RT1#sh contr t3

Framing is C-BIT Parity, Line Code is B3ZS, Clock Source is Internal

Your framing and code must be the same.

Then one must have clock source line and the other internal

Hall of Fame Super Gold

Re: DS3 bwtween router 3845 and 7206 VXR

Beside the good advice given by engagerocks, when a controller show loss of signal, circuit is dead. Only choice is to swap tx/rx BNC's, if no changes, circuit is faulty.

Note: I'm not 100% positive that all DS3's are provisione with "floating clock", that the need to provide your own on one side.

Re: DS3 bwtween router 3845 and 7206 VXR

I dont remember but i think you need to set the CRC correct on both the sides

7200VXR by default sets it to crc 32 while the 3800 can support only crc 16. Try configuring crc 16 on both sides and see whether the link comes up

HTH

Narayan

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