Guest

Preview Tool

Cisco Bug: CSCuj86736 - Need to optimize DFE tuning in 55xxUP series switches - RX CRC Errors

Last Modified

Jun 14, 2020

Products (9)

  • Cisco Nexus 5000 Series Switches
  • Cisco Nexus 5596UP Switch
  • Cisco Nexus 5548P Switch
  • Cisco Nexus 6004 Switch
  • Cisco Nexus 5020 Switch
  • Cisco Nexus 6001 Switch
  • Cisco Nexus 5548UP Switch
  • Cisco Nexus 5596T Switch
  • Cisco Nexus 5010 Switch

Known Affected Releases

5.2(1)N1(6) 6.0(2)N2(3)

Description (partial)

Symptom:
Ingress CRCs seen on Nexus 55xxUP switches when using twinax cabling.

Conditions:
Nexus 55xx. 
May occur after rapid link flaps.

Related Community Discussions

Nexus 5500: Twinax cable 使用時に CRC error が発生し、通信が不安定になる
2015年1月21日(初版)   TAC SR Collection 主な問題 Nexus5500 シリーズ にて Twinax cable 使用時に CRC error が発生し、通信が不安定になる事があります。 | N5548-A # show interface ethernet 1/4 | grep CRC     0 runts  0 giants  153 CRC  0 no buffer 原因 CRC | エラーが発生していたら、以下のコマンドにて該当 interface の Eye Height の値を確認し、 100mv 以下の場合、不具合<key>CSCuj86736</key> に該当する可能性があります。(コマンド出力が長いため、以下の例では出力を省略している部分があります。) | N5548-A#  show hardware internal carmel eye +-------+------------+-------------+------------+----------------------------+... | Port  | Eye Height |  Eye ...
Latest activity: Jan 20, 2015
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.