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Forwarding Options

  • Use the no-queue-pair configuration to exclude queue-pair from the hash calculation (QFX5230-64CD, QFX5240-64OD, and QFX5240-64QD)—Previously, the 5 tuple approach was used for hash calculation to identify a flow. But for remote direct memory access (RDMA) traffic, the 5 tuple hashing mechanism wasn't providing the desired entropy. So considering queue-pair into the hash calculation provided better entropy. Currently, queue-pair is by default included in the hash calculation You can use the no-queue-pair configuration to exclude queue-pair from the hash calculation.

    [See enhanced-hash-key.]

  • Unknown unicast drop configuration for VLAN interfaces (QFX5130-32CD, QFX5130E-32CD, QFX5130-48C, QFX5130-48CM, QFX5700, and QFX5700E)—You can enhance network performance and prevent traffic storms by configuring your switch to drop unknown unicast packets. This action prevents the flooding of unicast packets with unknown destination MAC addresses across VLAN interfaces.When you enable this feature, the switch learns and adds the source MAC address to the MAC address table. The switch drops packets with unlearned destination MAC addresses. This approach ensures efficient network resource usage and optimal network performance.

    [See Understanding and Preventing Unknown Unicast Forwarding.]