通过lldp协议识别物理服务器网卡接入的交换机端口信息随记

首先启动一个守护进程:

docker run --rm --net=host --uts=host -v /etc/os-release:/etc/os-release:ro --cap-add=NET_ADMIN --name lldpd-daemon ghcr.io/lldpd/lldpd:latest

再开一个shell ,利用之前启动的daemon查看协议

docker exec lldpd-daemon show neighbors

回显效果如下:

对于物理网卡能看到交换机端口接入信息(需要交换机兼容开启 lldp 协议)

有的物理服务器的带外管理页面里面，网卡状态也会呈现交换机端口接入信息，结合这些信息可以做好网络端口接入核对

# docker exec lldpd-daemon lldpcli show neighbors
-------------------------------------------------------------------------------
LLDP neighbors:
-------------------------------------------------------------------------------
Interface:    eth0, via: LLDP, RID: 1, Time: 0 day, 00:00:58
  Chassis:
    ChassisID:    mac b4:09:31:dd:aa:ee
    SysName:      A56-A57-S5735
    SysDescr:     Huawei Switch S5735-L48T4X-A
                  Huawei Versatile Routing Platform Software
                  VRP (R) software, Version 5.170 (S5735 V200R019C10SPC500)
                  Copyright (C) 2000-2020 HUAWEI TECH Co., Ltd.
    MgmtIP:       192.168.1.253
    MgmtIface:    4
    Capability:   Bridge, on
    Capability:   Router, on
  Port:
    PortID:       ifname GigabitEthernet0/0/4
    PortDescr:    to-4-5U
    TTL:          120
  Unknown TLVs:
    TLV:          OUI: 00,18,82, SubType: 40, Len: 4 00,00,00,01
-------------------------------------------------------------------------------
Interface:    eth1, via: LLDP, RID: 1, Time: 0 day, 00:00:58
  Chassis:
    ChassisID:    mac b4:09:32:dd:aa:ed
    SysName:      A56-A57-S5735
    SysDescr:     Huawei Switch S5735-L48T4X-A
                  Huawei Versatile Routing Platform Software
                  VRP (R) software, Version 5.170 (S5735 V200R019C10SPC500)
                  Copyright (C) 2000-2020 HUAWEI TECH Co., Ltd.
    MgmtIP:       192.168.1.253
    MgmtIface:    4
    Capability:   Bridge, on
    Capability:   Router, on
  Port:
    PortID:       ifname GigabitEthernet0/0/5
    PortDescr:    to-4U-5U-eth2
    TTL:          120
  Unknown TLVs:
    TLV:          OUI: 00,18,82, SubType: 40, Len: 4 00,00,00,01
-------------------------------------------------------------------------------