Using LLDP protocol for details about connected switches | Nutanix Community
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In Nutanix clusters running AHV hypervisors, we can use the LLDP protocol to find more details about the directly connected switches.

LLDP needs to be enabled in the switches for the details to be seen in the AHV hosts.

From the AHV host, 

>root@AHV-HOST ~]# lldpctl
------------------------------------------------------------------------
LLDP neighbors:
------------------------------------------------------------------------
Interface:    eth2, via: LLDP, RID: 7478, Time: 35 days, 22:55:59
  Chassis:
    ChassisID:    mac 00:XX:XX:2d:b6:ba
    SysName:      AHV-HOST
    SysDescr:     Network Switch
    TTL:          120
    MgmtIP:       xx.xx.xx.xx
    Capability:   Bridge, on
    Capability:   Router, off
  Port:
    PortID:       ifname Ethernet9
    PortDescr:    Nutanix-AHV-Node-A
    MFS:          9236
  VLAN:         100, pvid: yes
------------------------------------------------------------------------

You can get the following switch details:

  • Management IP address

  • MAC address

  • Interface ID

  • Vlan ID

You can also get the output from all the hosts in the cluster with the below command, from the CVM:

​​​​​​​nutanix@NTNX-XXXX-A-CVM:xx.xx.xx.xx:~$hostssh lldpctl
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