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Multiple breakout ports fail to link up on Cisco Nexus 9336

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

  • Cisco Nexus 9336 Cluster Network switch
  • RCF 1.8
  • Breakout ports (4x10Gb/s)

Issue

  • When using multiple 10Gb/s breakout links on a Nexus 9336, some links fail to come up

# show int status
--------------------------------------------------------------------------------
Port          Name               Status    Vlan      Duplex  Speed   Type
--------------------------------------------------------------------------------
Eth1/10       --                 intFailEr trunk     auto    auto    QSFP-40G-SR4

  • Switch logs shows Sufficient free entries are not available in TCAM bank

2022 Nov 21 23:05:21.598 Switch %ACLQOS-SLOT1-4-ACLQOS_OVER_THRESHOLD: Inst 1 Tcam 0 Bank 1's (Ingress L2 QOS [ing-l2-qos]) usage has reached its threshold
2022 Nov 21 23:30:10.018 Switch %ACLQOS-SLOT1-2-ACLQOS_OOTR: Tcam resource exhausted: Ingress L2 QOS [ing-l2-qos]
2022 Nov 21 23:30:10.028 Switch %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: Ethernet1/10)
2022 Nov 21 23:30:10.165 Switch %ETHPORT-5-IF_DOWN_ERROR_DISABLED: Interface Ethernet1/10 is down (Error disabled. Reason:Sufficient free entries are not available in TCAM bank)

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