はい、こんにちは！松井真也です。 前回は、ARP（アドレス解決プロトコル）の概要についてご紹介しました。「IPアドレス」からLAN上の「MACアドレス」を知るためのプロトコルです。特殊なフレームを発信してアドレス解決を図るわけですが、その中身が気 ...

今回はARPテーブルがなくなってしまう件の続きとなりますが、結論から申し上げると、目ぼしい理由は分からんのでいつもの暫定処置となります。ですが、こういったブリコラージュこそ野生の技術、いわばフィールドエンジニアの本懐となりますゆえ、ご ...

One useful tool for diagnosing network troubles is the arp command — a tool which allows you to display the IP address to hardware (MAC) address mappings that a system has built so that it doesn’t ...

As I understand things... An ARP request is a system querying an IP address and asking for the MAC associated with that address. Routers and switches send to MACs not IPs (right?) so they need to know ...

ARP or Address Resolution Protocol in Windows is responsible for resolving IP addresses to MAC addresses to speed up connection over a local network. So instead of asking the router where a particular ...

We've got a device on a new, dedicated vlan (the only only other device on it is the SVI from the cisco switch) that is reporting IP conflicts. Code: eth0 IP conflict by 68-EF-BD-21-9E-1A! eth0 IP ...