Flashing amber link light on modem flashing as well

The SB6121 link light uses color to indicate the connection speed. Blinking means data transfer is taking place. Blue means that it's a 1000Base-T (High-speed Gigabit Ethernet). Amber means it's an older ethernet device. 100Base-T or 10Base-T Ethernet connection.

Disconnect the ISP modem power and network / cable. Do the same with the router. Wait a few minutes and reconnect starting with modem.

Try just unplugging the router for 20 seconds then plug it back in.

British only say dodgy. so bingo for UK?
reckon is only said by us confederates, rebels.lol well the Arris (SB5101U) moldem is first , its LED happy./

SOUNDS LIKE IT IS BAD DO ME, IF MODEM WORKS
AND ROUTER FAILS THEN ROUTERS IS BAD.
But any router made can be not configured at all.
as in hard reset and fails. so reDO alo that. in the Airport router
AirPort extreme
Apple AirPort Extreme 802.11ac User Manual lets read some pages router
wan jack wired to wan jack on modem, check
the AP status LED light
off means no power.
sold amber means AP is process of starting up;.


SOLD GREEN LED: is good
Flashing Amber (orange/) means.
Your AirPort Extreme can't establish a connection to the network or the Internet,
or is encountering a problem. Use AirPort Utility to get information about what
might cause the status light to flash amber. See "If Your AirPort Extreme Status
Light Flashes Amber" on page 18.

the error above amber blink means the AP can not connect to the ARRIS MODEM. so reset it first. reset it by only unpluging AC power from wall for 5min and put back and wait 15min or until modem shows fully connected, to ISP./
the router is last not first. ISP not down today.
if the modem keeps failing call the ISP..
one can wire connect a PC directly tot the modem and test that way
but I will show a page on that now.

https://red-dot-geek.com/connect-pc-modem-ethernet-cable/


now you learned how to test the modem first and then router.
wired
once wired works both modem and router
we play WIFI H3LL all day long, ask. can do but endless causes to fail, in truth.

call comcast to activate your modem.
US amber indicates 100Mbps connection.

If the wireles light is flashing Amber .. Some one outside your house is trying to access the Wireless network . If it is always flashing amber.. try with a Firmware update available in belkin.com/au/support.

Thank You

Actually there is no problem with the Modem
First Get the following Information from your ISP

1 ) The Connection Type
2 ) If it is PPPoE then Get the user name and Password

Step 1 : Connect Modem - Router - Computer (Wired)

Step 2 : Open RSP By typing 192.168.2.1 on the Address Bar of the internet explorer

Step 3 : On the Left Side Under Internet WAN Click
Connection type

Step 4 : Leave the Password Blank and click Submit

Step 5 : Select the connection type as given by the ISP

Step 6 : Click Next

Step 7 : Type Username And Password for PPPoE ,Click Apply Changes

Step 8 : There is no need to type Any Host Name for dynamic Click Apply Changes

Step 9 : If it is A Cable connection then

Step 10 : On the left side Under Internet WAN Click MAC Address

Step 11 : Click Clone

Step 12 : Click Apply Changes

Step 13 : Restart the Router

Step 14 : Check the Internet Status

Yes. I've put a piece of tape over it, so that the blinking is less annoying.

The broadband link light tells you the status of the connection between the modem and the broadband servers in your area. Green means everything is A-Ok while amber means your modem is not picking up a broadband signal.

Try turning the modem off and on and also make sure the cables are secure while you're at it. If the broadband light is still amber, the only thing you could do next is to call your internet service provider.

what you running it from(computerwise)..sounds like you may have a driver/interface issue with computer.

got backup?