Linux › Section I · Your network and its configuration › Topic I.13
ARP, NDP, and wireless Ethernet
One last piece connects IP to Ethernet: before a frame can be sent, the kernel must learn the hardware address behind an IP address. This topic shows that neighbour table on Linux, then looks at the extra machinery a wireless interface needs before IP can even begin.
In this topic
- From IP address to MAC address
- Viewing neighbours with ip neigh
- Only neighbours on the link
- Worked example: reading the neighbour table
- Fixing a stale entry
- IPv6: Neighbor Discovery
- What wireless adds
- The tools underneath
- Worked example: joining Wi-Fi with nmcli
- Common mistakes to avoid
- Key takeaways
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