jetson tk1 ethernet speed problem

I am using jetson Tk1 21.4.

I am connected to internet via Ethernet.

I am getting good network speed in firefox browser. But when i run “apt-get update” or install any application via apt-get, download speed goes to 0 after sometime and remains 0. But if open firefox and open/refresh any webpage, the downloading speed again goes up. but then also freeze to zero after sometimes.

So whats to problem?

I don’t know what the problem is, but in many cases strange behavior such as that seems to go away after rebooting any router. So I’m guessing there is a router involved, rather than direct connection to the internet.