Preview Tool

Cisco Bug: CSCta71839 - Ping failure observed after over-weekend traffic and CM reset

Last Modified

Feb 08, 2017

Products (1)

  • Cisco uBR10000 Series Universal Broadband Routers

Known Affected Releases


Description (partial)

Wideband Cable Modems are w-online but cannot be pinged.
DOCSIS pings to CMs can be done successfully.
This might result in loss of IP connectivity for the modems.

This problem was observed in Bighorn. 
Roger's TB had around 300+ modems on the SPA and there was a script being run that did clear cable modem all delete every 20 minutes.
This caused a large number of IPCs to the jacket. In some cases the IPCs to clear DSID didn't all arrive reliably at the jacket. So, a subsequent modem coming online using the DSID would have non-zero seq num in first packet.
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.