Preview Tool

Cisco Bug: CSCuo57455 - Nexus 3000: Input Discards due to STP Blocking or VLAN Disallowed

Last Modified

Nov 27, 2020

Products (2)

  • CiscoPro Workgroup EtherSwitch Software
  • CiscoPro Workgroup EtherSwitch Software

Known Affected Releases


Description (partial)

Input discards under "show interface Eth x/y" incrementing on the Nexus 3000.

Also, "show hardware internal interface indiscard-stats front-port <port#>" reports "STP discards" counter incrementing

Ingress traffic on a port for a VLAN in STP blocking state.


Ingress traffic on a port for a VLAN not in the trunk allowed list.

Related Community Discussions

<key>CSCuo57455</key> - Nexus 3000 Input Discards due to STP Blocking or VLAN Disallowed when Juniper SRX650 Cluster Control Link port Connected
Hello, I have two Juniper SRX650 FW devices and they are currently configured in Cluster mode. At the moment their cluster Control Link and Data fabric Interlink are connected to a Cat 2960G switch with jumbo frames enabled. But I want to move the cluster Control Link and Data Interlink port connections to a Nexus 3064 switch. When I connect the Cluster Control Link to an access port on the Nexus 3K, the Juniper FW cluster goes down. When I reconnect the Control Link back to cat 2960G the FW cluster ...
Latest activity: May 10, 2018
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.