FAQ

Why do I fail to receive an echo reply packet from an IPv6 network after I ping the network with an echo request packet that exceeds 1,500 bytes in size?

In data transmission, the size of each packet is limited by the maximum transmission unit (MTU). For example, the Ethernet MTU is 1,500 bytes. If a packet exceeds the MTU at the network layer, it is divided into smaller fragments. This process, called fragmentation, reduces data transmission efficiency when it occurs frequently.

In IPv6 networks, routers do not fragment packets. Only the source host performs fragmentation at the network layer, which improves packet processing efficiency. If a packet exceeds the MTU, the IPv6 router drops it and notifies the source host that the packet is too large. The source host then fragments the packet and retransmits it. When you ping an IPv6 network with a packet that exceeds 1,500 bytes (MTU), you cannot receive a reply. We recommend that you use a smaller packet to test network connectivity.

How does a backend server that uses an IPv4 address provide services to IPv6 clients?

You can use Global Accelerator (GA) to enable IPv6 clients to access IPv4 backend services. For more information, see Enable IPv4 services to support IPv6 clients.

Can I change the metering method of IPv6 Internet bandwidth?

No.

However, you can delete the pay-by-bandwidth Internet bandwidth and purchase pay-by-data-transfer bandwidth instead. Your IPv6 address remains unchanged.