Description

After creating a new routing instance, DNS cache entries may fail to refresh as expected. This can occur if DNS queries continue to use an incorrect outgoing interface instead of the interface associated with the new routing instance.

Symptoms

You may observe the following behavior:

  • DNS cache is not updating after the routing instance is created
  • DNS cache TTL does not increment or refresh
  • DNS queries are sent through the wrong interface
  • DNS packets may be dropped by an upstream device due to an incorrect forwarding path

Solution

  • If the DNS cache does not refresh after a new routing instance is added, verify that the DNS name-server configuration includes the correct routing instance. This ensures DNS traffic follows the intended path and allows cache updates to resume.

Modification History

2024-11-02 : Article Created