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Ports do not link up on Cisco Nexus 9336C-FX2 due to TCAM resources

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Category:
fabric-interconnect-and-management-switches
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hw
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Applies to

  • Cisco Nexus 9336C-FX2
  • ONTAP 9

Issue

  • Switch ports 1-10 are already occupied by existing nodes
  • Ports not linking up (in err-disabled state) when adding new nodes using switch ports 11-18 
  • Switch errors logged for affected ports. Example:

%ETHPORT-5-IF_HARDWARE: Interface Ethernet1/13, hardware type changed to 100G
%ETHPORT-3-IF_UNSUPPORTED_TRANSCEIVER: Transceiver on interface Ethernet1/13 is not supported
%ACLQOS-SLOT1-4-ACLQOS_OVER_THRESHOLD: Inst 1 Tcam 0 Bank 1's (Ingress L2 QOS [ing-l2-qos]) usage has reached its threshold
%ACLQOS-SLOT1-4-ACLQOS_OVER_THRESHOLD: Inst 1 Tcam 0 Bank 1's (Ingress L2 QOS [ing-l2-qos]) usage has reached its threshold (message repeated 1 time)
%ETHPORT-5-SPEED: Interface Ethernet1/13, operational speed changed to 100 Gbps
%ETHPORT-5-IF_DUPLEX: Interface Ethernet1/13, operational duplex mode changed to Full
%ETHPORT-5-IF_RX_FLOW_CONTROL: Interface Ethernet1/13, operational Receive Flow Control state changed to off
%ETHPORT-5-IF_TX_FLOW_CONTROL: Interface Ethernet1/13, operational Transmit Flow Control state changed to off
%ACLQOS-SLOT1-2-ACLQOS_OOTR: Tcam resource exhausted: Ingress L2 QOS [ing-l2-qos]
%ETHPORT-5-IF_SEQ_ERROR: Error ("Sufficient free entries are not available in TCAM bank") communicating with MTS_SAP_IPQOS_MGR for opcode MTS_OPC_ETHPM_PORT_BRINGUP (RID_PORT: Ethernet1/13)
%ETHPORT-5-IF_DOWN_ERROR_DISABLED: Interface Ethernet1/13 is down (Error disabled. Reason:Sufficient free entries are not available in TCAM bank)

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