Preview Tool

Cisco Bug: CSCur84243 - WS-X4640-CSFP-E ports (Tx) are disabled on start-up

Last Modified

Feb 12, 2018

Products (1)

  • Cisco Catalyst 4500 Series Switches

Known Affected Releases

15.1(2)SG4 15.2(3)E 3.6(6.0)

Description (partial)

In Cisco Catalyst 4506-E, 4507R-E, 4507R+E,4510R-E, and 4510R+E chassis with WS-X4640-CSFP-E line cards, random ports are disabled in the transmit direction, when the switch is booted-up. The following message is observed:

%SFF8472-5-THRESHOLD_VIOLATION: Gix/x: Tx power low alarm; Operating value: -40.0 dBm, Threshold value: -13.0 dBm.

This problem is seen on Cisco Catalyst 4506-E, 4507R-E, 4507R+E,4510R-E, and 4510R+E chassis when they are fully populated with WS-X4640-CSFP-E line cards, running cat4500e-universalk9.SPA.03.04.04.SG.151-2.SG4.bin or cat4500e-universalk9.SPA.03.06.00.E.152-2.E.bin. 
Sometimes this issue is observed when two or more WS-X4640-CSFP-E Line cards are loaded in the chassis.

Related Community Discussions

Disabled txpower on some ports when fully populating WSC4506E with WS-X4640-CSFP-E on bootup
Hi, We have a issue where some CSFP's, every third or so, have disabled txpower on bootup (-40dBm in show int tran ) if you populate a 4506E chassis with 4 or more WS-X4640-CSFP-E. "hw-module module 2 reset" brings up the card in functioning state. Swapping the LC's does not help, tested on several boxes and with different types of power supplies. The ports can be completely unconfigured and it still happens. Every port have the same configuration.   Completely new hardware. Tested two IOS: 14755  ...
Latest activity: Nov 25, 2014
Bug details contain sensitive information and therefore require a 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.