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    ApsaraVideo VOD:Configure origin fetch over IPv6

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    ApsaraVideo VOD:Configure origin fetch over IPv6

    Last Updated:Feb 10, 2026

    After you configure origin fetch over IPv6, Alibaba Cloud CDN points of presence (POPs) can access origin servers using IPv6. You can also choose from different back-to-origin policies, such as prioritizing IPv6 addresses, matching the client’s IP version, or IPv4/IPv6 Load Balancing.

    Background information

    After you enable origin fetch over IPv6, POPs use IPv6 to fetch content from origin servers based on your selected policy if the origin server supports IPv6 access.

    Note

    • POPs outside the Chinese mainland do not support origin fetch over IPv6.

    • At least one origin server does not use an IPv6 address. If all origin servers use IPv6 addresses, some POPs may fail to redirect requests to origin servers.

    Procedure

    1. Log on to the ApsaraVideo VOD console.

    2. In the left-side navigation pane, choose Configuration Management > CDN Configuration > Domain Names.

    3. On the Domain Names page, find the domain name to manage and click Configure in the Actions column.

    4. In the navigation pane on the left, click Back-to-Origin.

    5. On the Configure tab, click Modify in the Origin Fetch over IPv6 section.

    6. In the Origin Fetch over IPv6 dialog box, turn on Use IPv6, Match Client, or IPv4/IPv6 Load Balancing. The following table describes the parameters.

      image

      Parameter

      Description

      Use IPv6

      After you enable this feature, the origin servers use IPv6 services by default.

      Note

      If the POP or the origin server does not have an available IPv6 address, an IPv4 connection is used.

      Match Client

      After you enable this feature, the IP version of the client request is used for origin fetch.

      Note

      • If a client request uses IPv6, an origin server that uses IPv6 is used for origin fetch. If no origin server uses IPv6, an origin server that uses IPv4 is used for origin fetch.

      • If a client request uses IPv4, an origin server that uses IPv4 is used for origin fetch. If no origin server uses IPv4, an origin server that uses IPv6 is used for origin fetch.

      IPv4/IPv6 Load Balancing

      After you enable this feature, polling is used to specify the IP address of the origin server for origin fetch, regardless of whether the requests are sent over IPv4 or IPv6.

      Note

      • The IPv4/IPv6 Load Balancing, Use IPv6, and Match Client features are mutually exclusive. If you enable IPv4/IPv6 Load Balancing, Use IPv6 and Match Client are automatically disabled.

      • If you specify a weight ratio for IPv4 and IPv6 addresses, origin fetch is performed based on the weight ratio.

    7. Click OK to complete the configuration.