x710 firmware update

I have trouble updating firmware for X710DA4 card.

This card drops connection at random with Linux 4.9.9 driver.

The driver requires firmware update.  But I tried all three versions

at Intel website and all said update not available.

Any help would be much appreciated.

ethtool -i ens4f1

driver: i40e

version: 2.0.19

firmware-version: 4.10 0x800011c5 0.0.0

expansion-rom-version:

bus-info: 0000:02:00.1

supports-statistics: yes

supports-test: yes

supports-eeprom-access: yes

supports-register-dump: yes

supports-priv-flags: yes

lspci does not show serial number:

Capabilities: [e0] Vital Product Data

                Product Name: XL710 40GbE Controller

                Read-only fields:

                        [PN] Part number:

                        [EC] Engineering changes:

                        [FG] Unknown:

                        [LC] Unknown:

                        [MN] Manufacture ID:

                        [PG] Unknown:

                        [SN] Serial number:

                        [V0] Vendor specific:

                        [RV] Reserved: checksum good, 0 byte(s) reserved

                Read/write fields:

                        [V1] Vendor specific:

                End