Cisco Catalyst 4000 Series Switches

Revised December 8, 2006

August 8, 2000

NOTICE:

THIS FIELD NOTICE HAS BEEN ARCHIVED AND IS NO LONGER MAINTAINED OR UPDATED BY CISCO.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

Problem Description

When enabling HTTP server on a Catalyst 4000, some of the configuration may be lost after the second reset performed to upgrade OS to 5.4(2).

Problem Symptoms

The error message shown below indicates that on the next system reset the switch **WILL** lose its global block configuration.

2000 May 18 12:36:32 %SYS-4-NVLOG:check_block_and_log:Block 0 checksum failed: 0xFC43(0xFC44)

Background

HTTP server has to be enabled if a customer wants CiscoView to access the Catalyst 4000 switch. When a customer upgrades a Catalyst 4000 switch that previously had HTTP enabled to cat4000.5-4-2, and then issues a set ip http server enable command, the command will direct write to NVRAM causing inconsistency in the block checksum output. This block checksum error could cause potential loss of configuration after the switch has reset.

Workaround/Solution

Catalyst 4000 software releases 5.4(3) and higher do not have this problem.

Workaround while using Catalyst OS 5.4(2):

During bootup, set the HTTP server state to disable, regardless of the HTTP server state in the NVRAM.

Example: set ip http server disable

After the switch resets (part of the Catalyst OS upgrade process), only enable HTTP server if CiscoView needs access to that switch.

DDTS

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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:

• Open a service request on Cisco.com
• By email
• By telephone

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