I am trying to understand how this works.
To give some background, I am Level 1 tech for a major Western Canada ISP cable provider. I am trying to figure out why people lose an ip address from day to day. Or why bypassing the wifi router, thus getting a valid ip address, then hooking up the router back into the mix will allow the router to pass an ip address.
So my tools will be able to show me the modem's RF levels and if it is passing an ip address 24.xx.xx.xx
So in my scenario, person A has a Motorola Surfboard 5102 docsis 2 series modem to D-link DIR-615 router to a win 7 machine, tablet and cell phone. (Basically insert commonly used residential hardware. )
So customer goes to sleep with working internet, they wake up in the morning, and the internet is down. Why would this happen?
I can see on my end that the SB5102 RF levels are good and the modem is no longer passing an IP address. It does not look like the modem went offline per the timers available in my tool.
I go through standard troubleshooting. Power cycle modem and router, wait a bit and there is no ip address. I typically then bypass the wifi modem and go direct from SB5102 to pc. (No ipconfig release/renew or restart of the pc). Boom the win 7 machine identifies a network and I see a valid IP address. They can browse now.
So we work the router back into the mix with an obligatory power cycle of the SB5102 prior to adjusting the Ethernet cables. Now an ip address is being passed by the router to the SB5102 and thus onto the ISP.
Why does this switching of the communication path and back again then allow the router to become effective in network communication?
Would there be some sort of cloning of the MAC address or IP conflict that had occurred?