http://www.cisco.com/c/en/us/support/docs/lan-switching/switched-port-analyzer-span/116260-technote-wireshark-00.html

http://www.cisco.com/c/en/us/support/docs/ios-nx-os-software/ios-embedded-packet-capture/116045-productconfig-epc-00.html

https://www.bufferbloat.net/projects/

https://www.reddit.com/r/networking/comments/3binop/top_of_rack_switching_suggestions/

https://people.ucsc.edu/~warner/buffer.html

http://www.snookles.com/slf-blog/2012/01/05/tcp-incast-what-is-it/

https://sourceforge.net/p/e1000/mailman/e1000-devel/thread/505390FD.1030607%40intel.com/#msg29811601

https://fasterdata.es.net/

http://blog.lah.io/2013/10/cisco-catalyst-4500-x-etherchannel-auto.html

http://blog.performancevision.com/eng/earl/links-between-latency-throughput-and-packet-loss

http://www.cisco.com/c/en/us/support/docs/lan-switching/switched-port-analyzer-span/116260-technote-wireshark-00.html

Queueing in the Linux Network Stack

Bufferbloat in switches/bridges

Important commands to debug interface drops on Catalyst 3650/3850:

sh interfaces gi1/0/XX

sh interfaces gi1/0/XX counters errors

sh controllers ethernet-controller gigabitEthernet 1/0/XX

sh platform qos queue config gigabitEthernet 1/0/XX

sh platform qos queue stats gigabitEthernet 1/0/XX

Important links:

http://www.cisco.com/image/gif/paws/12027/53.pdf

http://www.cisco.com/c/en/us/support/docs/switches/catalyst-3850-series-switches/200594-Catalyst-3850-Troubleshooting-Output-dr.html

If you want to use OTP authentication within WiFis described in article Enabling 2FA with privacyIDEA for wireless networks and are using Sophos WLAN, you have to ensure that „Fast Transition“ is off, since this required the OS to logon twice (beginning with Windows 10).

Took me some time to find the error