Link Copied
hi
I will clarify: we are designing new fiber optics for SFP+. that new fiber got some error bits. we can count them on BER tester, but thats not enough. we need to count them AFTER layer-2.
FIRST , we need to transmit packets on SFP+ with FEC. so we are using packETH-master/cli/packETHcli to transmit PCAP packets that we added to them error correction bits.
we planned to use XL710 in this task:
1. XL710 Port0 is sending packets with packETHcli
2. a special fiber is connected between Port0 and Port1
3. we are receiving them and counting them on Port1 side , like that :
ethtool --statistics $P1 | egrep -i crc
$P1 is Port1
a typical result (when we transmit heavy traffic) is
rx_crc_errors: 93
port.rx_crc_errors: 93
port.rx_multicast: 4000065 (i sent 4M pkts with a special FEC bits inside)
port.rx_size_1023: 3999904
4. we KNOW that 4M received, 93 recognized as CRC ERROR. (because of the special fiber) , and correctly passed the MAC layer 3999904
so we have 93 CRC , and 3 missing. but those 3 are not interesting now. maybe later.
5. we WANT to see and EXAMINE the 93 dropped CRC packets
for that , I need to disable CRC , like in SPEC :
once disabled, the MAC WILL NOT drop them, and wire-shark / tcpdump would be able to catch them and show them
we must analyze the typical CRC commonly dropped packet before applying a specific FEC algorithm.
Note: Port0 disable CRC is not critical now. although we would probably shut them off both on the design phase. (Port0 & Port1 CRC)
Br,
Tal
hi
Board is : LR-LINK LREC9812BF-SFP+ 2x10G Intel X710 FIBER , installed in this Desktop :
do you want me to open the desktop and check inside the card ?
i need to know how to generate a PCI transaction to SWITCH OFF the CRC ENABLE, as appears in page 160
the best we could have, is a type of generic firmware, with a mailbox, that we could load {addr,data} pairs, and access the regfile.
i was a MAC/SWITCH designer for many years ago at Galileo-Marvell and this very familiar to me
more info about the HARDWARE, as you may want to identify the specific type of HW we got inside:
1. lshw :
======
*-network:0 - that is "Port0" or $P0
description: Ethernet interface
product: Ethernet Controller X710 for 10GbE SFP+
vendor: Intel Corporation
physical id: 0
bus info: pci@0000:01:00.0
logical name: enp1s0f0np0
version: 02
serial: 6c:b3:11:7a:41:a0
size: 10Gbit/s
width: 64 bits
clock: 33MHz
capabilities: pm msi msix pciexpress bus_master cap_list rom ethernet physical fibre autonegotiation
configuration: autonegotiation=off broadcast=yes driver=i40e driverversion=6.8.0-52-generic duplex=full firmware=9.53 0x8000f8e6 1.3189.0 latency=0 link=yes multicast=yes port=fibre speed=10Gbit/s
resources: irq:16 memory:8d000000-8d7fffff memory:8e800000-8e807fff memory:df180000-df1fffff memory:8e000000-8e3fffff memory:8e810000-8e90ffff
*-network:1
description: Ethernet interface
product: Ethernet Controller X710 for 10GbE SFP+
vendor: Intel Corporation
physical id: 0.1
bus info: pci@0000:01:00.1
logical name: enp1s0f1np1
version: 02
serial: 6c:b3:11:7a:41:a2
size: 10Gbit/s
width: 64 bits
clock: 33MHz
capabilities: pm msi msix pciexpress bus_master cap_list rom ethernet physical fibre autonegotiation
configuration: autonegotiation=off broadcast=yes driver=i40e driverversion=6.8.0-52-generic duplex=full firmware=9.53 0x8000f8e6 1.3189.0 latency=0 link=yes multicast=yes port=fibre speed=10Gbit/s
resources: irq:16 memory:8d800000-8dffffff memory:8e808000-8e80ffff memory:df100000-df17ffff memory:8e400000-8e7fffff memory:8e910000-8ea0ffff
2. lspci -x -s 01:00.0;lspci -x -s 01:00.1
=============================
01:00.0 Ethernet controller: Intel Corporation Ethernet Controller X710 for 10GbE SFP+ (rev 02)
00: 86 80 72 15 06 04 10 00 02 00 00 02 00 00 80 00
10: 0c 00 00 8d 00 00 00 00 00 00 00 00 0c 00 80 8e
20: 00 00 00 00 00 00 00 00 00 00 00 00 86 80 00 00
30: 00 00 18 df 40 00 00 00 00 00 00 00 0a 01 00 00
01:00.1 Ethernet controller: Intel Corporation Ethernet Controller X710 for 10GbE SFP+ (rev 02)
00: 86 80 72 15 06 04 10 00 02 00 00 02 00 00 80 00
10: 0c 00 80 8d 00 00 00 00 00 00 00 00 0c 80 80 8e
20: 00 00 00 00 00 00 00 00 00 00 00 00 86 80 00 00
30: 00 00 10 df 40 00 00 00 00 00 00 00 0a 01 00 00
note BYTE are different : 0x12 0x1D 0x32
3. ethtool -i Port0
=============
ethtool -i $p0
driver: i40e use this driver to access the HW
version: 6.8.0-52-generic driver version
firmware-version: 7.20 0x80007a08 1.3189.0 FW version
expansion-rom-version:
bus-info: 0000:01:00.0 0000:01:00.1 for Port1
supports-statistics: yes
supports-test: yes TBD examine what this do
supports-eeprom-access: yes via NVM ?
supports-register-dump: yes how to dump ?
supports-priv-flags: yes private flags
4. NVM
=====
Intel(R) Ethernet NVM Update Tool
NVMUpdate version 1.42.24.2
Copyright(C) 2013 - 2024 Intel Corporation.
Num Description Ver.(hex) DevId S:B Status
=== ================================== ============ ===== ====== ==============
01) Intel(R) Ethernet Converged 9.83(9.53) 1572 00:001 Up to date
Network Adapter X710
hope that all you need
Thanks
Tal
