You can enable telemetry on Dell OS10 switches to integrate Buffer Statistics and Tracking on Dell switches.

Prerequisites

Add a Dell Switch

When requests are received from the switch, vRealize Network Insight collector stores or buffers the packet on the defined port.

When the buffer size increases due to the increase of input rate when compared with the output rate, the requests might slow down or time-out. Dell OS10 swicthes uses gRPC to capture such metric information, which you can see on vRealize Network Insight. This allows you to diagnose application performance problems that were potentially caused due to network congestion and also proactively provides the impact of congestion on application and network.

Procedure

  • Run the following commands on the Dell OS10 switch:
    telemetry
    enable
    !
    destination-group dg03
     destination vRNI Collector IP 50000
    !
    subscription-profile sp03
     sensor-group bgp
     sensor-group buffer
     sensor-group device
     sensor-group environment
     sensor-group interface
     sensor-group lag
     sensor-group system
     destination-group dg03
     encoding gpb
     transport grpc no-tls
     source-interface ethernet1/1/1

Results

vRealize Network Insight collector collects the following telemetry information from the Dell OS10 switches.
  • per-port egress unicast queues
  • per-port egress multicast queues
  • per-port egress service pool
  • per priority group ingress shared headroom
  • per service pool ingress

What to do next

Run any of the following queries:
  • show ports where metric > X in time range
  • show switches where metric > X in time range
  • port show metrics in time range
  • swicth show metrics in time range
  • show switches where at least one port metric > X in time range

You see the respective event triggered. For example, SwitchPort Buffer Threshold Exceeded Event.

You can also search for the Interface Peak Buffer Utilization metric and identify the reason for the request slow down.