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vSRX interfaces did not go down when assigned to SR-IOV virtual functions

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Article ID: KB31894 KB Last Updated: 29 Jun 2017Version: 1.0
Summary:

This article discusses the behavior of vSRX interfaces when assigned to single-root I/O virtualization (SR- IOV) virtual functions (VF).

Symptoms:

 SR-IOV VF can be assigned to vSRX. The vSRX interfaces that use SR-IOV VF did not go down when SR-IOV physical functions (PF) or host NIC went down.

Cause:

This is due to the data plane development kit (DPDK) used on vSRX.

DPDK have link level status detecting API, and this API is not implemented for SR-IOV PF.  When the physical interface is up, DPDK API cannot detect it is up. This is the same when the physical interface is down; DPDK API cannot detect it is down.

Hence, when SR-IOV VF is used, the corresponding vSRX VM GE-*/*/* is designed to always be UP.

Solution:

This behavior is by design for vSRX.

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