2n-clx xxv710 avf ip4 perf tests failing

T-Rex  is reporting link down during ip4 perf tests execution on 2n-clx systems with avf driver on xxv710 nic in most of runs.

TG interfaces are running and up but avf interfaces on DUT don't report link up status. It's expected that there is something wrong in avf interface initialization. It will be debugged when there is available some 2n-clx test bed after finishing job runs for CSIT rls2001 report.