i40e驱动卸载_IntelX700系列网卡（i40e驱动）看不到LLDP邻居收不到LLDP包

1、部署完服务器后&＃xff0c;在服务器上将LLDP打开&＃xff0c;想通过LLDP去排查服务器与交换机的网线、光纤有没有连接错误&＃xff0c;但是发现服务器的电口网卡(Intel X700系列网卡)无法正常显示LLDP邻居&＃xff0c;就怀疑是网卡配置的问题。

[[email protected] ~]# lspci |grep net

18:00.0 Ethernet controller: Mellanox Technologies MT27710 Family [ConnectX-4 Lx]

18:00.1 Ethernet controller: Mellanox Technologies MT27710 Family [ConnectX-4 Lx]

3d:00.0 Ethernet controller: Intel Corporation Ethernet Connection X722 for 1GbE (rev 09)

3d:00.1 Ethernet controller: Intel Corporation Ethernet Connection X722 for 1GbE (rev 09)

3d:00.2 Ethernet controller: Intel Corporation Ethernet Connection X722 for 1GbE (rev 09)

3d:00.3 Ethernet controller: Intel Corporation Ethernet Connection X722 for 1GbE (rev 09)

5f:00.0 Ethernet controller: Mellanox Technologies MT27710 Family [ConnectX-4 Lx]

5f:00.1 Ethernet controller: Mellanox Technologies MT27710 Family [ConnectX-4 Lx]

2、为了进一步定位问题&＃xff0c;我们在异常接口上去通过tcpdump去抓包只能抓到服务器往外发的LLDP报文&＃xff0c;没有抓到交换机发下来的报文。然后检查交换机配置后在交换机上debug&＃xff0c;发现交换机接口有LLDP报文的收发&＃xff0c;所以进一步判断是服务器网卡处理的问题。

[[email protected] ~]# tcpdump -i enp61s0f1 |grep -i LLDP

tcpdump: verbose output suppressed, use -v or -vv for full protocol decode

listening on enp61s0f1, link-type EN10MB (Ethernet), capture size 262144 bytes

11:27:38.357788 LLDP, length 262: BCONEST-X86-MON02

11:28:08.401968 LLDP, length 262: BCONEST-X86-MON02

11:28:38.445474 LLDP, length 262: BCONEST-X86-MON02

11:29:08.489210 LLDP, length 262: BCONEST-X86-MON02

11:29:38.533460 LLDP, length 262: BCONEST-X86-MON02

11:30:08.579707 LLDP, length 262: BCONEST-X86-MON02

11:30:38.624087 LLDP, length 262: BCONEST-X86-MON02

11:31:08.668239 LLDP, length 262: BCONEST-X86-MON02

11:31:38.712726 LLDP, length 262: BCONEST-X86-MON02

3、经过不懈的搜索&＃xff0c;在Radhat知识库发现了问题的所在&＃xff0c;Intel X710 series NICs (i40e) do not receive LLDP frames

Intel 700 series NICs run an LLDP agent in firmware that will process and “absorb” any LLDPDU frames received from the switch. The frames are therefore never visible to the OS.

Intel 700 系列网卡在固件中会运行一个LLDP agent&＃xff0c;这个agent会处理所有从交换发出的LLDP报文&＃xff0c;这样在操作系统层面就再也看不到这个报文了。

解决方案&＃xff1a;

Radhat提供了两个解决方案

①当Kernel版本大于等于kernel-3.10.0-957.el7&＃xff0c;可以调用ethtool --set-priv-flags eth0 disable-fw-lldp on通知网卡驱动关闭内置的LLDP agent。

ethtool --set-priv-flags disable-fw-lldp on

ethtool --set-priv-flags disable-fw-lldp on

②内核版本低或第一种方案不生效是可以通过该方法关闭&＃xff0c;但是这种方法重启会失效。

echo "lldp stop" > /sys/kernel/debug/i40e//command

echo "lldp stop" > /sys/kernel/debug/i40e/0000\:3d\:00.0/command #开启0口

echo "lldp stop" > /sys/kernel/debug/i40e/0000\:3d\:00.1/command #开启1口

4、检查lldp信息是否能正常显示。

[[email protected] ~]# echo "lldp stop" > /sys/kernel/debug/i40e/0000\:3d\:00.0/command

[[email protected] ~]# lldptool -t -n -i enp61s0f1

Chassis ID TLV

MAC: 00:01:7a:6a:02:15

Port ID TLV

Ifname: gigabitethernet2/0/44

Time to Live TLV

120

Port Description TLV

dT:[BCONEST-X86-MON02]-eno4-bond0-10.194.220.2

System Name TLV

ZJNB-PSC-P10F2-POD3-M-JR-4320-3&4

System Description TLV

MyPower (R) Operating System Software

Copyright (C) 2020 Maipu Communication Technology Co.,Ltd.All Rights Reserved.

System Capabilities TLV

System capabilities: Bridge, Router

Enabled capabilities: Bridge, Router

Management Address TLV

IPv4: 10.0.0.40

Ifindex: 4

Port VLAN ID TLV

PVID: 1

Port and Protocol VLAN ID TLV

PVID: 0, supported, not enabled

VLAN Name TLV

VID 1200: Name VLAN1200

MAC/PHY Configuration Status TLV

Auto-negotiation supported and enabled

PMD auto-negotiation capabilities: 0x009b

MAU type: 1000 BaseTFD

Power via MDI TLV

Port class PD

PSE MDI power not supported

PSE pairs not controllable

PSE Power pair: unkwown [0]

Power class 1

Link Aggregation TLV

Aggregation capable

Currently not aggregated

Aggregated Port ID: 0

Maximum Frame Size TLV

9216

End of LLDPDU TLV