Guest

Preview Tool

Cisco Bug: CSCsz29407 - decrease 520 CLC CPU by optimizing sending MAPs to SPA channels

Last Modified

Feb 08, 2017

Products (1)

  • Cisco uBR10000 Series Universal Broadband Routers

Known Affected Releases

12.2(33)SCB

Description (partial)

Symptom:
The 520U card CPU usage can be high for a number of reasons.  One reason is that when an upstream is shared with a remote SPA channel using the following configuration line, there is added CPU expense to sending DOCSIS MAP messages to those channels:
Cable<slot>/<subslot>/<index>
  downstream Modular-Cable <slot>/<bay>/<port> rf-channel <channel>

The 520H card also uses more CPU for the same functionality, but due to a faster CPU with larger L2 cache, the CPU usage is not as noticeable on an H card.

Conditions:
520 U cards used with Modena SPAs.
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.