IPv4 over IPv6 Tunnel Header To ensure the transmission of IPv4 packets over IPv6 networks, append IPv6 headers to IPv4 packets to encapsulate the IPv4 packets into IPv6 packets. Figure 19-1 shows the standard protocol-defined format of an IPv6 header. Figure 19-1 IPv6 header for...
I. Header format simplification IPv6 cuts down some IPv4 header fields or move them to extension headers to reduce the load of basic IPv6 headers, thus making IPv6 packet handling simple and improving the forwarding efficiency. Although the IPv6 address size is four times that of IPv4 addresse...
Figure 2 IPv4 compared to IPv6 address bits Header Format Simplification Another major improvement in IPng is divergence of packet header as existing in IPv4. Internet Protocol version 6 (IPv6) has made a simpler packet header as compared to IPv4 by dropping some of the field...
Although the IPv6 address size is four times the IPv4 address size, the basic IPv6 packet header size is only twice the size of the option-less IPv4 packet header.Figure 1 IPv4 packet header format and basic IPv6 packet header format...
Figure 11-3 Networking diagram for applying the IPv6 over IPv4 tunnel On the border device, the IPv4/IPv6 dual protocol stack is enabled, and an IPv6 over IPv4 tunnel is configured. After the border device receives a packet from the IPv6 network, the device appends an IPv4 header to the...
The IPv6 header and extension headers replace the existing IPv4 header with options. The new extension header format allows IPv6 to be augmented to support future needs and capabilities. Unlike options in the IPv4 header, IPv6 extension headers have no maximum size and can expand to accommodate...
The IPv6 header and extension headers replace the existing IPv4 header with options. The new extension header format allows IPv6 to be augmented to support future needs and capabilities. Unlike options in the IPv4 header, IPv6 extension headers have no maximum size and can expand to accommodate...
IPv6 Packet Header FormatThe IPv6 protocol defines a set of headers, including the basic IPv6 header and the IPv6 extension headers. The following figure shows the fields that appear in the IPv6 header and the order in which the fields appear....
If a device cannot calculate the checksum based on the entire register message, you can configure the device to calculate the checksum based on the register message header. · Register suppression time—The source-side DR stops sending register messages enc...
The egress node removes the routing extension header and forwards the packets to the destination. SID SRv6 supports the following types of SIDs: · IPv6 address of an interface. · SRv6 SID that has a specific function. An SRv6 SID is in the format of IPv6 address, but the IPv6 ...