Thread

1. a11r · 1789659411 · focus · HN ↗

   Back in 2008 Fujitsu has one of the best performing 10Gbps Switches. We were building 40 Gbps packet sniffers at Google (4x 10 Gbps NICs) and needed switches that could do things like mirror traffic across ports at line rate. Fujitsu was way ahead of the pack. I always wondered what held them back from building a meaningful networking business in the US.

   1. ricksunny · 1789664155 · focus · HN ↗

      >We were building 40 Gbps packet sniffers at Google (4x 10 Gbps NICs) and needed switches that could do things like mirror traffic across ports at line rate

      I'm sure there were good reaasons for this, but man this just sounds bad. Like that's the spec I think NSA must give to their contractors outfitting 611 Folsom Street's Room 641A

      1. agilob · 1789666296 · focus · HN ↗

         It does sound bad the way OP described it, but packet or HTTP mirroring is a standard feature of A/B testing and blue-green deployments of a very critical code. Mirror traffic between version 1 and 2, then compare response body, response time and return response A to the end users.

         1. fmbb · 1789672865 · focus · HN ↗

            But the comment says ”we were building packet sniffers” … and needed mirroring as part of that.

            1. yabones · 1789673506 · focus · HN ↗

               It's super common and very useful for security systems to work like this. Instead of putting something in-line that might choke on a burst of traffic you put it off to the side and send it a firehose of packets it may or may not be able to handle. If it falls over, no problem.

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