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Cisco Catalyst 2950 Series Switches

Field Notice: FN - 19494 - Catalyst 2950 Hardware Not Supported by Certain Down Revision Software Releases


Revised May 11, 2007

June 21, 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

Comments

WS-C2950-12

Refer to HW Serial Number and SW Release matrix below.

WS-C2950-24

Refer to HW Serial Number and SW Release matrix below.

WS-C2950C-24

Refer to HW Serial Number and SW Release matrix below.

WS-C2950T-24

Refer to HW Serial Number and SW Release matrix below.

Problem Description

Due to hardware changes in the Catalyst 2950 switches, some older Cisco IOS® software releases are not supported on the new hardware. This issue will only occur if attempting to down grade a new Catalyst 2950 to an earlier Cisco IOS software release.

Background

Currently for Catalyst 2950 products there are two types of Switching ASICs.

Some Catalyst 2950s require Cisco IOS Software Releases 12.0(5.z)WCy, 12.1(6)EA2a, 12.1(6)EA2b, or 12.1(6)EA2c. Currently the only way to tell the difference between Catalyst 2950 ASICs is through the serial number. Please refer to hardware/software matix below to find the software version(s) with which your switch will operate.

Hardware

Serial Number

Release 12.0(5)WC2b or Earlier

Release 12.1(6)EA2, Release 12.1(6)EA2a, Release 12.1(6)EA2b

Release 12.1(6)EA2c and Later

WS-C2950-12

Any Serial Number (SN) beginning with FAA or FAB

Supported

Not supported

Supported

WS-C2950-12

SNs lower than FOC0616W1H6 or FHK0616W34M

Supported

Not supported

Supported

WS-C2950-12

SNs FOC0616W1H6 or FHK0616W34M or higher

Not supported

Not supported

Supported

WS-C2950-24

Any SN beginning with FAA or FAB

Supported

Not supported

Supported

WS-C2950-24

SNs lower than FOC0616Z1ZM or FHK0617Y0N3

Supported

Not supported

Supported

WS-C2950-24

SNs FOC0616Z1ZM or FHK0617Y0N3 or higher

Not supported

Not supported

Supported

WS-C2950C-24

Any SN beginning with FAA or FAB

Supported

Supported

Supported

WS-C2950C-24

SNs lower than FOC0616TOJH or FHK0617W0YA

Supported

Supported

Supported

WS-C2950C-24

SNs FOC0616TOJH or FHK0617W0YA or higher

Not supported

Not Supported

Supported

WS-C2950T-24

Any SN beginning with FAA or FAB

Supported

Supported

Supported

WS-C2950T-24

SNs lower than FOC0617X11P or FHK0617Y1M2

Supported

Supported

Supported

WS-C2950T-24

SNs FOC0617X11P or FHK0617Y1M2 or higher

Not supported

Not Supported

Supported

For complete hardware/software compatibility and serial numbers, refer to the matrix detailed in the Limitations and Restrictions section of the Release Notes for the Catalyst 2950 Switch Cisco IOS Release 12.1(9)EA.

Problem Symptoms

When a switch with the new hardware attempts to download an older version of software, the following error message will be displayed:

C2950POST Failure: Ethernet Controller Test: Failed 00:00:07: %STRATA-3-
PCI_FIND_FAILURE: The number of asics expected were 1, PCI bus scan found -1

Workaround/Solution

If you encounter the above error message on the Catalyst 2950-12, 2950-24, 2950C-24, or 2950T-24 switches please upgrade to Cisco IOS Software Release 12.1(6)EA2c. DDTS.

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

CSCdx56183 (registered customers only)

C2950POST Failure: %STRATA-3-PCI_FIND_FAILURE

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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