IPv6 Example

Link-Local Address

Examine an IPv6 packet with link-local addresses (fe80::/10). Understand how link-local addressing works for local network communication in IPv6.

Hex Data

60 00 00 00 00 08 11 40 FE 80 00 00 00 00 00 00 00 00 00 00 00 00 00 01 FE 80 00 00 00 00 00 00 00 00 00 00 00 00 02
Note: Prefix fe80::/10 indicates link-local address, next header UDP (0x11)
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link-local

Field Breakdown

Version
IP version (always 6 for IPv6)
96
Traffic Class
Traffic class for QoS
0x60
Flow Label
Flow label for QoS handling
0x00000
Payload Length
Length of payload in bytes (excluding header)
8
Next Header
Type of next header
17
UDP
Hop Limit
Hop limit (similar to TTL in IPv4)
64
Source IP
Source IPv6 address (128 bits)
0x0000000000000000FE80000000000000
Destination IP
Destination IPv6 address (128 bits)
0x0000000000000000FE80000000000000

Related Resources

IPv6 Parser - Decode IPv6 Packets Online | ByteLensIPv6 Header Format and Fields Explained - ByteLensIPv4 vs IPv6 - Key Differences and Migration GuideIP Address Protocol - What is IP? IPv4 vs IPv6 Explained

About IPv6

Internet Protocol version 6 (RFC 8200)

Fields: 8
Endianness: big
Specification: RFC 8200