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Q&A: Can I advertise IPv6 prefix within the GRE (IPv4) tunnel?

Question

  • Is it possible to tunnel IPv6 within the IPv4 GRE tunnel, or if it is mandatory to have IPv6 GRE tunnel?

  • Can we announce both IPv4 and IPv6 subnets over a single ipv4 based tunnel?

Environment

  • Silverline DDoS
    • GRE Tunnels

Answer

  • Yes, it is possible to advertise IPv6 prefix inside GRE tunnel when advertising to us.
  • It will be GRE tunnel (IPv4) with IPv6 BGP peering address inside it.
  • You can enable it in the GRE tunnel configuration by checking the box labeled "Has v6 interconnect.'ipv6.png

 

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