networking

Bandwidth and Latency

   Some guides for max throughput calculation inc. latency

https://www.virtualtothecore.com/forget-latency-calculate-network-performance/ 

It has all the details and a link to https://wintelguy.com/wanperf.pl 

 Also I have a curl script ( sorry for linux, but maybe someone can do it in powershell or DOS 😉 ) with URL and proxy as input, which gives the latency in sec. Man oage https://curl.se/docs/manpage.html under -w option.

$  ~/bin/check-res https://www.db.com http://userproxy.intranet.db.com:8080

url=https://www.db.com,proxy=http://userproxy.intranet.db.com:8080,proxy_ip=10.233.152.40,server_http_code=301,proxy_http_code=200,time_total=0.185099,time_connect=0.033586,time_appconnect=0.143795,time_starttransfer=0.185008,time_namelookup=0.020709,time_pretransfer=0.143871

BTW What is the latency from the migration server to the proxy / azure location ?

Can you do a wireshark on the virtual proxy  and look at the SYN / SYN ACl time which is the RTT for outbound and .  a SYN ACK / ACK for the inbound.  Add all up and see with this the impact. I think with 160ms you go down from 900MB to 700MB for 1G links with default window size.

https://wintelguy.com/wanperf.pl 

https://www.virtualtothecore.com/forget-latency-calculate-network-performance/

	Don’t forget latency when you calculate network performance - Virtual to the Core In my job, I have to learn a lot about multiple topics of IT. Especially in the virtualization market, many people are usually well prepared when it comes to infrastructure, servers and storage, but I found out that the weakest point is many times networking. www.virtualtothecore.com