Why CAR Is Inaccurate?

Created Dec 29, 2015 17:56:06Latest reply Dec 30, 2015 09:57:47 848 1 0 0
The CAR of a switch covers the inter-frame gap and the length of VLAN tags. As the frame gap and VLAN tag length may vary, the CAR cannot be 100% accurate.

The calculation of CAR covers the inter-frame gap and the length of VLAN tags. For example, if a tagged packet is 64 bytes, the VLAN tag is 4 bytes, and the inter-frame gap is 20 bytes, then the actual packet length is 88 bytes. The CAR error caused by the extra 24 bytes is greater.If the packet is 1000 bytes, VLAN tag is 4 bytes, and the inter-frame gap is 20 bytes, then the actual packet length is 1024 bytes. The CAR error caused by the extra 24 bytes is smaller. Therefore, you are advised to use packets containing more than 1000 bytes for the test to minimize the impact of the inter-frame gap or VLAN tag length on the CAR.
  • x
  • convention:

who_knows  Mentor   Created Dec 30, 2015 09:57:47 Helpful(0) Helpful(0)

Thank you for sharing!
  • x
  • convention:

Responses

Reply
You need to log in to reply to the post Login | Register

Notice:To ensure the legitimate rights and interests of you, the community, and third parties, do not release content that may bring legal risks to all parties, including but not limited to politically sensitive content, content concerning pornography, gambling, drug abuse and trafficking, content that may disclose or infringe upon others' intellectual properties, including commercial secrets, trade marks, copyrights, and patents, and personal privacy. Do not share your account and password with others. All operations performed using your account will be regarded as your own actions and all consequences arising therefrom will be borne by you. For details, see“ Privacy Policy.”
If the attachment button is not available, update the Adobe Flash Player to the latest version!
Fast reply Scroll to top