Category Archives: Microsoft

What does Microsoft mean by low / moderate / high / very high / extremely high Azure network bandwidth (part 2.1)

This article is part of a series of 5 where I am talking about the Microsoft Azure network bandwidth. For a better understanding please make sure you read also the other parts:

  1. What does Microsoft mean by low / moderate / high / very high / extremely high Azure network bandwidth (part 1)
  2. The isolated network setup (the environment used for network analysis) (part 2)
  3. The IOmeter benchmark tests who reproduce as close as possible the HTTP/HTTPS, SMB and MS SQL network traffic (part 3)
  4. The Azure Virtual Machines used to run the IOmeter benchmarks (part 4)
  5. Results and interpretations

 

What happens when we perform a PING?

what_does_microsoft_means_by_low_moderate_high_very_high_extremely_high_azure_network_bandwidth_05

Please note when a PING is performed the default amount of data (ICMP data) passed between the systems is 32 bytes.

 

In the next image you can see how Wireshark is representing the network traffic – in this case with red is highlighted the frame associated to the PING echo request.
ETH = 14 bytes
count the number of bytes marked with blue at the bottom of this picture (Wireshark’s Packet Bytes window section)

what_does_microsoft_means_by_low_moderate_high_very_high_extremely_high_azure_network_bandwidth_06

 

IP = 20 bytes
count the number of bytes marked with blue at the bottom of this picture (Wireshark’s Packet Bytes window section)

what_does_microsoft_means_by_low_moderate_high_very_high_extremely_high_azure_network_bandwidth_07

 

ICMP data = 32 bytes

count the number of bytes marked with blue at the bottom of this picture (Wireshark’s Packet Bytes window section)

what_does_microsoft_means_by_low_moderate_high_very_high_extremely_high_azure_network_bandwidth_08

 

ICMP = ICMP header + ICMP data
40 bytes = ICMP header + 32 bytes
ICMP header = 40 bytes – 32 bytes
ICMP header = 8 bytes

what_does_microsoft_means_by_low_moderate_high_very_high_extremely_high_azure_network_bandwidth_09

 

So, in the end we can say Wireshark represents this PING echo request as a single frame in total size of 74 bytes where:

  • ETH size = 14 bytes
  • IP size = 20 bytes
  • ICMP header = 8 bytes
  • ICMP data = 32 bytes

 

Go back to the previous page.