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Cisco Catalyst 8500 Series Multiservice Switch Routers

Field Notice: FN - 19391 - Cell Loss and CRC Errors When OC12 PAM Is Connected to a SuperCAM in a C8540MSR System


Revised October 31, 2005

May 7, 2002


NOTICE:

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

Products Affected

Product

Top Assembly

Printed Circuit Assembly

Comments

Part Number

Rev.

Part Number

Rev.

C85MS-SCAM-2P

68-0446-01

-E0

73-2739-03

-F0

C8540 SuperCAM for Port Adapter Modules (PAMs)

WAI-OC12-1MM

68-0294-03

-A0

73-1864-02

-B2

1 Port OC-12c/STM-4c MMF PAM

WAI-OC12-1SS

68-0232-02

-D0

73-1497-02

-C0

1-port OC-12c/STM-4 SMF PAM

WAI-OC12-1SSLR

68-0385-02

-D0

73-2510-01

-C0

1 Port OC-12c/STM-4c SMF-LR PAM

C85MS-SCAM-2P=

68-0446-03

-D0

73-2739-04

-C0

C8540 SuperCAM for Port Adapter Modules (PAM) Spare

WAI-OC12-1MM=

68-0294-04

-B0

73-1864-03

-A0

1 Port OC-12c/STM-4c MMF PAM (Spare)

WAI-OC12-1SS=

68-0385-02

-D0

73-2510-01

-C0

1-port OC-12c/STM-4 SMF PAM (Spare)

WAI-OC12-1SSLR=

68-0385-02

-D0

73-2510-01

-C0

1-port OC-12c/STM-4 SM LR PAM

Problem Description

When the C8540 MSR is placed under heavy load, cells may be misordered when they are sent out of a WAI-OC12-1MM PAM placed in a C85MS-SCAM-2P SuperCAM, causing cell losses and CRC errors.

Background

Cell losses and CRC errors caused by cell misordering occur when a WAI-OC12-1MM PAM is connected to a C85MS-SCAM-2P SuperCam in a Catalyst 8540MSR system. The 1-Port OC12 PAM on any C85MS-SCAM-2P is causes cell corruption that inevitabily leads to packet corruption whenever segmentation and reassembly (SAR) is performed to put the cells back into frames.

Conditions under which the problem occurs:

  1. This problem is seen on Catalyst 8540 SuperCAMs using the one port OC12 PAM only.

  2. It only manifests at traffic rates above 99% maximum OC-12 (1.398 Mc/sec and above).

Problem Symptoms

Visible symptoms include unexplained cell losses (no rx fifo drops shown in the switch) and CRC errors in frames transiting the hardware. The CRC errors are caused by the misordered cells leaving the WAI-OC12-1MM port adapter module.

Workaround/Solution

For a complete fix, there are two updates required.

  1. The C85MS-SCAM-2P SuperCAM FPGA image must be updated to release 1.9 (fi-c8540-scam.B.1-9) or later. Download the file fi-c8540-scam.B.1-9 from the Cisco.com Software Center.

  2. For the SCAM/OC12 combination with the C85MS-SCAM-2P installed in slots 10, 11, or 12, the Cisco IOS® software must be upgraded to release 12.0(18)W05(22), 12.1(7a)EY1, or later. If the combination is in slots 10, 11, or 12, then Cisco IOS software must be upgraded to release 12.0(25)$5(26), 12.1(12c)EY, 12.1(13)E1, or later. A simplified matrix is given below. Download the software from the Cisco.com Software Center.

Slots which have the SCAM/OC12 combination

Software which has the fix

FPGA

1, 2, 3, 4, or 9

12.0(18)W05(22) or later in the 12.0 release, 12.1(7a)EY1 or later in the 12.1E release

1.9

1, 2, 3, 4, 8, 10, 11, or 12

12.0(24)W5(26) or later in the 12.0 release, 12.1(13)E1 or later in the 12.1E release, 12.1(12.c)EY

1.9

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

CSCdt91430 (registered customers only)

Cell misordering under load in OC12 PAM / SuperCAM

CSCin13787 (registered customers only)

SCAM/OC-12: ARM gets into underruns if it recv traf frm SCAM/OC-12

How To Identify Hardware Levels

To identify the hardware version, FPGA and Part Number, run the show hardware detail command.

Platan#show hardware detail

C8540 named Platan, Date: 12:56:02 UTC Fri Apr 6 2001

    Slot Ctrlr-Type   Part No.  Rev Ser No   Mfg Date  RMA No.  Hw Vrs  Tst EEP
    ---- ------------ ---------- -- -------- --------- -------- ------- --- ---
    3/*  Super Cam    73-2739-03 B0 03170TF9 May 02 99 0 3.0 
    3/0  155MM PAM    73-1496-03 A0 10989016 Dec 08 98 00-00-00 3.2     0   2
    3/1  155MM PAM    73-1496-03 A6 03203786 Aug 01 95 00-00-00 3.1     0   2
    9/*  Super Cam    73-2739-03 B0 03170TJ3 May 02 99 0        3.0 
    9/0  155MM PAM    73-1496-03 00 03114831 Feb 26 96 00-00-00 3.0     0   2
    10/* Super Cam    73-2739-03 B0 03200VWZ May 14 99 0        3.0 
    10/0 622MM PAM    73-1864-02 A0 07200135 Dec 12 97 00-00-00 1.2     0   2
    10/1 622MM PAM    73-1864-02 A0 03102177 Nov 29 96 00-00-00 1.2     0   2


slot: 3/* Controller-Type : Super Cam
Part Number: 73-2739-03 Revision: B0 
Serial Number: MIC03170TF9 Mfg Date: May 02 99
RMA Number: 0 H/W Version: 3.0
FPGA Version: 1.8

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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