LLDP查询网络拓扑

1. 安装工具包

   yum install lldpd
   systemctl start lldpd
   

2. 查询lldp 信息

   # lldpcli show neighbors
   -------------------------------------------------------------------------------
   LLDP neighbors:
   -------------------------------------------------------------------------------
   Interface:    eth0, via: LLDP, RID: 1, Time: 0 day, 00:01:58
     Chassis:
       ChassisID:    mac 00:00:00:00:00:00
       SysName:      xxx
       SysDescr:     H3C Comware Platform Software, Software Version 7.1.070, Release 1312
                     H3C S5130-54C-HI
                     Copyright (c) 2004-2019 New H3C Technologies Co., Ltd. All rights reserved.
       MgmtIP:       10.95.85.1
       Capability:   Bridge, on
       Capability:   Router, on
     Port:
       PortID:       ifname GigabitEthernet1/0/25
       PortDescr:    GigabitEthernet1/0/25 Interface
       TTL:          121
   

FAQ

1. intel X710 lldp agent 禁用

   # 查看 driver 是否是 i40e
   ethtool -i eth0 | grep "driver"
   
   # disable lldp agent，注意 0000:01:00.2 是 pci 号，可以先 cat, 里面会显示网卡的名字
   echo lldp stop > /sys/kernel/debug/i40e/0000:01:00.2/command