Identify Nearby Network Interfaces

You can use the lldp_neighbors script to identify nearby network interfaces for nodes. Typically a node's network neighbor is a network switch, so the script is useful for identifying the network switch ports that a node is plugged in to. The network neighbors are listed in the _neighbors reserved attribute on the node.

1. Run the script to identify the node neighbors and set the reserved attribute:

   cw-nodectl -i<node name> script lldp_neighbors
   

2. After the script completes, view the neighbors on the node:

   cw-nodectl -i<node name> ls -l
   

The script can run on multiple nodes.

For example:

1. Run the script on nodes n20-24:

   cw-nodectl -in20-24 script lldp_neighbors
   

2. After the script completes, view the node neighbors for node n22:

   [admin@head ~]$ cw-nodectl -in22 ls -l
   Nodes
     n22
       attributes
         _boot_config: DefaultBoot
         _neighbors: enp6s0=sonic:Ethernet97,bootnet=monkish:swp36,enp1s0f1=monkish:swp6
   <...snip...>