+ :param node: Topology node.
+ :param pf_pcis: List of node's interfaces PCI addresses.
+ :param rx: RX flow. Default: off.
+ :param tx: TX flow. Default: off.
+ :type nodes: dict
+ :type pf_pcis: list
+ :type rx: str
+ :type tx: str
+ """
+ for pf_pci in pf_pcis:
+ pf_eth = InterfaceUtil.pci_to_eth(node, pf_pci)
+ cmd = f"ethtool -A {pf_eth} rx off tx off"
+ ret_code, _, _ = exec_cmd(node, cmd, sudo=True)
+ if int(ret_code) not in (0, 78):
+ raise RuntimeError("Failed to set MTU on {pf_eth}!")