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Help Center/ Elastic IP/ FAQs/ Product Consultation/ What Are the Differences Between the Primary and Extension NICs of ECSs?

What Are the Differences Between the Primary and Extension NICs of ECSs?

Updated on 2022-09-30 GMT+08:00

The differences are as follows:

  • Generally, the OS default routes preferentially use the primary NICs. If the OS default routes use the extension NICs, network communication will be interrupted. Then, you can check the route configuration to rectify the network communication error.
  • Primary NICs can communicate with the public service zone (zone where PaaS and DNS services are deployed). Extension NICs cannot communicate this zone.
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