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Cisco 12000 Series Routers

Field Notice: *Expired* FN - 13453 - 4xOC12 Revision 3 Framer Can Cause Line Card to Lock up


Revised October 10, 2006

June 15, 2001

THIS FIELD NOTICE HAS BEEN ARCHIVED AND IS NO LONGER MAINTAINED OR UPDATED BY CISCO.

THIS FIELD NOTICE IS PROVIDED ON AN "AS IS" BASIS AND DOES NOT IMPLY ANY KIND OF GUARANTEE, WARRANTY OR SUPPORT. USE OF THE INFORMATION ON THIS FIELD NOTICE OR MATERIALS LINKED FROM THIS FIELD NOTICE IS AT YOUR OWN RISK. CISCO RESERVES THE RIGHT TO CHANGE OR UPDATE THIS FIELD NOTICE AT ANY TIME.


Products Affected

Product

Comments

4OC12E/POS-IR-SC(=)

4 port OC-12/STM4 SONET/SDH Single-Mode IR with SC

4OC12E/POS-MM-SC(=)

4 port OC-12/STM4 SONET/SDH Multi-Mode with SC

Problem Description

The 4302 Revision 3 framer Application-Specific Integrated Circuit (ASIC) has a bug that can cause the other ports on a line card (LC) to fail. Revision 4 fixes the problem.

Background

There is a bug in the data-squelch function of framer ASIC revision 3 (08-0200-03) that may cause a single packet to be improperly terminated when the specific SONET alarms loss of frame (LOF) and loss of pointer (LOP) become active. The bug causes traffic to stop on all four ports for about one second and an error message to print to the console. No other SONET alarms sensitize the bug, including loss of signal (LOS), which means that pulling the fiber connection cannot sensitize the bug.

Problem Symptoms

Cisco Gigabit Switch Router (GSR) with Quad OC12 packet over SONET (POS) LCs is reporting the following error message.

SLOT 6:000031: 00:30:52: %LCPOS-3-SOP: RX:UnexpectedSop. Source=0x4 (Framer), halt_minor0=0x8000 
SLOT 6:000032: 00:30:52: %GSR-3-INTPROC: Process Traceback= 400C31F8 400BDFDC 40010A0C
-Traceback= 4017AE9C 404CDD9C 400BD47C
000085: 00:33:36: %GRP-3-FABRIC_UNI: Unicast send timed out.

Workaround/Solution

Customers who wish to proactively replace one or more of their affected products with units not exhibiting this problem should request a Return Materials Authorization (RMA) from the Cisco TAC. RMA orders will be shipped next business day and standard delivery only.

DDTS

To follow the bug ID link below and see detailed bug information, you must be a registered user and you must be logged in.

DDTS

Description

CSCdm92754

perf-QOC12: %LCPOS-3-SOP: Rx SOP. (source=0x2, halt_minor0=0x8000)

How To Identify Hardware Levels

The only reliable way to identify the framer ASIC revision is to query the framer ASIC directly. Cisco recommends customers contact the TAC for assistance using this method. Cisco also recommends customers schedule this activity during a maintenance window because querying the framer ASIC revision using the procedure below will momentarily flap the packet over SONET (POS) interface(s).

Attach to the LC and execute the command sequence below to collect JTAG values. There are four values per framer. Concatenating the JTAG values will give you a code that can translate to the ASIC framer revision.

?LC-Slot2#test fab 
    ?BFLC (? for help) [rd]:rd 
    ?From address [0x12000804]: 0x12000808 
    ?To address [0x12000804]: 0x12000808 
    ?Access type [0x1]:0x1 
    ?0x12000808: 0x40? <----------------- JTAG3 
    ?    
    ?BFLC (? for help) [rd]:rd 
    ?From address [0x12000808]: 0x1200080A 
    ?To address [0x12000808]: 0x1200080A 
    ?Access type [0x1]:0x1 
    ?0x1200080A: 0x0C? <----------------- JTAG2
    ? 
    ?BFLC (? for help) [rd]:rd
    ?From address [0x1200080A]: 0x1200080C
    ?To address [0x1200080A]: 0x1200080C 
    ?Access type [0x1]:0x1
    ?0x1200080C: 0x80 <------------------ JTAG1  
    ? 
    ?BFLC (? for help) [rd]:rd
    ?From address [0x1200080C]: 0x1200080E 
    ?To address [0x1200080C]: 0x1200080E 
    ?Access type [0x1]:0x1 
    ?0x1200080E: 0x2F <------------------ JTAG0

The Revision 4 framer should have JTAG values of 400C802F. Anything else is a lower revision.

caution Caution: Using a value of 0x8 for the Access type, which may be the default in some Cisco IOS® Software releases, can cause the LC to crash.

For More Information

If you require further assistance, or if you have any further questions regarding this field notice, please contact the Cisco Systems Technical Assistance Center (TAC) by one of the following methods:

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