Guest

Preview Tool

Cisco Bug: CSCuj17317 - XE: Certain snagless cables may press on the mode button causing reload

Last Modified

Mar 16, 2020

Products (1)

  • Cisco Catalyst 3850 Series Switches

Known Affected Releases

15.0(1)EX1

Description (partial)

Request to adjust the current behavior.  This bug is being considered as an enhancement to avoid future unexpected resets on existing hardware.  There is a field notice to inform customers of possible hard (non-software) workarounds to the issue:
http://www.cisco.com/en/US/customer/ts/fn/636/fn63697.html

Symptom:
Express Setup is a feature that allows for quick configuration of basic features on the WS-C3850 and other IOS-XE based switches.  Express Setup is invoked through holding the Mode button for 2 seconds on an unconfigured switch or for 10 seconds on a previously configured switch.  When this happens the switch configuration is deleted and the switch reboots and can be configured using Express Setup or via the CLI.

Large anti-snag cable boots have the potential of coming into contact with the mode button resulting in the unexpected invocation of Express Setup.  This request is for a change in the default behavior of Express Setup to avoid invocation when a switch is in production and invocation is undesirable.

Conditions:
The cable boot is making extended contact with the mode button resulting in Express Setup being invoked.  The following messages are seen when this issue is encountered on the WS-3850-48 or other IOS-XE based switch:

##########################
%SYS-7-NV_BLOCK_INIT: Initialized the geometry of nvram
%EXPRESS_SETUP-6-CONFIG_IS_RESET: The configuration is reset and the system will now reboot
%SYS-5-RELOAD: Reload requested by NGWC led process. Reload Reason: Reload command.
%STACKMGR-1-RELOAD_REQUEST: 1 stack-mgr:  Received reload request for all switches, reason Reload command 
%STACKMGR-1-RELOAD: 1 stack-mgr:  Reloading due to reason Reload command 
##########################

The device will then reset and the configuration will not be present when it comes back up.

Related Community Discussions

Converged Access - 3.3.4 Beta Available
Download link On 8-15-2014, interim build 3.14.30EZP was posted at https://upload.cisco.com/cgi-bin/swc/fileexg/main.cgi?CONTYPES=WNG under Forum: Unified Access EFT   Support For any new issues while testing this code, please report to 5760-mr4-feedback@external.cisco.com   Images ct5760* is for 5760 wireless controller cat3k* is for Catalyst 3850 and 3650 converged access switches   Issues fixed on this Release   Bug Id Bug Headline CSCum91301 IPDT: Standby crashes due to host table corruption ...
Latest activity: Aug 29, 2014
Bug details contain sensitive information and therefore require a Cisco.com account to be viewed.

Bug Details Include

  • Full Description (including symptoms, conditions and workarounds)
  • Status
  • Severity
  • Known Fixed Releases
  • Related Community Discussions
  • Number of Related Support Cases
Bug information is viewable for customers and partners who have a service contract. Registered users can view up to 200 bugs per month without a service contract.