Why PXE boot of RHEL7 server connected to Arista switch fails ?

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Issue

When tried to PXE boot a RHEL7.4 server, the interface on the server was blocked by Arista switch.
Is it like server is sending BPDU packets which could get block on switch level ? If at all yes, which service/component can send BPDU packets ? And how to disable it ?

Environment

Red Hat Enterprise Linux 7.4 PXE boot
Arista switch with BPDU guard enabled

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