One of the interesting and non-obvious problems of a packet capture system is engineering the underlying filesystem to store all data. You might think writing to a standard EXT4 / XFS / JFS / pick your favorite file system is enough. However this is a huge huge red flag, as there is no guarantee on the sustained write performance, which can result in packet loss.

パケットキャプチャシステムの興味深く不明確な問題のひとつはすべてのデータを保管するファイルシステムにあるエンジニアリングです。標準のEXT4 / XFS / JFS /の中から好きなファイルシステムを選べば良いと思うかもしれませんが、パケットロスをひき起こす書き込みパフォーマンスが持続する保証はないため、これは大変重大な赤信号です。

One of the great things about 10GbE, 40GbE and 100GbE packet capture is it captures everything, included network corruption! Errors can take the form of Ethernet Frame Check Sequence (FCS) which is a 32bit CRC calculated across the entire packets payload. This post discuss how we capture and some of the tools to help debug errors on the network typically seen on WAN links.

10GbE、20GbE、40GbE、100GbEパケットキャプチャの素晴らしい点のひとつはネットワーク破損を含めてすべてをキャプチャする事です！エラーは全体のパケットのペイロード全体で計算された32ビットのCRCであるイーサネットフレームチェックシーケンス（FCS）の形態をとります。この投稿ではWANリンクに良く見られるネットワークをどのようにキャプチャし、エラーをデバッグするツールをご紹介します。

We get asked alot, "why is your 10Gbps Packet capture price so good?". Almost all our clients have some disbelief about our prices. There`s a secret to our pricing and how we achieve such affordable packet capture systems. Its`s not magic just high quality engineering, we discuss the how`s and whys in this post.

弊社によく質問が来ます。「なぜあなた達の10Gbpsパケットキャプチャはそんなにお買い得ですか？」ほとんどのお客様が弊社の値段を信じられないようです。弊社の値段とそのようなお買い得なパケットキャプチャシステムを提供できるのには秘密があります。それは魔法ではなく高品質エンジニアリングです。この記事でその方法と理由をご説明します。

Finally our 20Gbps dual port 2x10G capture system is available! Its been quite a bit more work than expected as 30M Packets/Sec processing isn`t easy, but we`ve done it and open for orders.

ついに弊社の20Gbpsデュアルポート 2x10Gキャプチャシステムが利用可能になりました！ 30M パケット/秒処理は簡単ではないので想定よりも多くの作業が発生しましたが、ついに完成し注文可能となりました。

Packet capture is good and all, but how exactly do you capture packets on a network ? There`s a range of approaches from Layer1 optical TAP`s to Smart SPAN protocols and everything in between. We dig into the various Pro`s and Con`s of each approach.

パケットキャプチャはとても便利ですが、あなたは具体的にネットワークのパケットをどのようにキャプチャしたいですか？レイヤ1光学タップからスマートSPANプロトコルやその中間といった様々なアプローチがあります。私達はそれぞれのアプローチに対する長所・短所を分析してみました。

All our production inventory is purchased via our trusted partners but for a R&D project we received not 1 but 2 fake CPU`s from Amazon.com. Still can`t believe it, especially since its not some random 3rd party seller but the seller was Amazon itself!

Our FMADIO10 and FMADIO20 products are unique by operating in a hybrid SSD / HDD mode. However the lower HDD sustained throughput reduces the sustained capture rate when used in continuous high bandwidth 24H / 7 capture mode. We dig deeper and understand what’s happening under the hood for long run capture and what the system limitations are.

Its an often used cliche "only in Japan" do you get XYZ, usually some sort of outrageous TV show, strange food or something worse. I`ve been here in Tokyo for long enough that nothing really surprises me these days but once in a while you find something that's pretty cool.

ネットワークマイクロバースト解析は問題のトラブルシューティング、ネットワークフローの理解、スループット/待ち時間の最適化という全てのネットワークトポロジーにとって重要です。FMADIO製品は強力な内臓マイクロバースト解析機を含み、あなたのマイクロバーストに対する疑問に答えるお手伝いをします。

Network microburst analysis is important for all network topologies to trouble shoot problems, understand network flow and optimization throughput/latency. FMADIO products have a powerful builtin microburst analyzer to assist and answer any microburst questions you can ask.

After months of slaving away, problem after problem finally, yes finally! fmadio40 the 1x40G or 4x10G line rate packet capture system gets its first demo in RL (real life). There`s a lot of info on the blog about the system but its completely different when your there talking with a real live person about what’s great, what’s ok and what sucks.

Often in networking technology circles we hear the term "line rate" such as "10Gbit line rate" which roughly translates to network traffic at the maximum capacity and in this case at 10Gbit/second. While it sounds clear, the actual data transfer rate can be a bit non-intuitive.

ネットワーキングテクノロジーサークルでは良く「10Gbpsラインレート」のような「ラインレート」という用語を耳にします。これは簡単に言うとネットワークトラフィックの最大容量で、この場合10Gbit/秒になります。簡単に聞こえますが実際のデータ転送レートについてはちょっと分かりづらいです。

Good cost effective full line rate packet sniffers are great, but by them self aren`t all that helpful. The power of packet capture is when its coupled with analyzer software, such as opensource tools like Snort or Suricata, our opensource tools or your customized analysis software. We understand this and our device has exceptional integration that's easy, simple, and enables you to go from 0 to 100 within your existing infrastructure in no time flat.

The accuracy of 1PPS otherwise known as 1 Pulse per second is quite an interesting topic. We discussed how our 40G packet sniffer system calculated extreme nano accuracy time before, what’s missing is how accurate our 10G packet sniffer can synchronize UTC world time using the onboard GPS PPS signal that’s included with every system.