[Bloat] transparenty bridge/tap with fq_codel

[Stephen Hemminger]

On Mon, 11 Mar 2019 16:01:36 -0700
Dev <dev at logicalwebhost.com> wrote:

> I built a transparent bridge on a Debian platform earlier running fq_codel between eth2 and eth3 as br0 which seemed to improve throughput. 
> 
> Now, I’m wondering if there’s a way to copy some of those packets to another onboard NIC eth4 for analysis on another box on the network. How significant of a performance hit will this be on commodity hardware on my bridge throughput, and/or what is best practices? Has anyone already done this and made it work?

It is possible to do this with ingress qdisc and a mirred filter to mirror packets to another device. That is the Linux way to create SPAN ports on a bridge.