Forum Discussion

Lpens's avatar
Lpens
New Contributor
5 years ago

2 Ethernet Ports on Modem

Has anyone been able to get both ethernet ports on their modem to work at the same time? I have an Arris SB8200 (that has 2 ethernet ports on the back) and I would like to have one ethernet cable p...
2EthernetPorts
2IPAddresses
ARRIS SB8200
Bruce's avatar
Bruce
Honored Contributor III
5 years ago

When delving into topology, stop using the word "Ethernet."

A modem has a WAN port...not a LAN port.  At best...if it's active...the 2nd port won't have Internet service but your other devices may be able to discover the 2nd port via layer-2.

  • Lpens's avatar
    Lpens
    New Contributor
    5 years ago

    Arris calls them "ethernet" ports on their own model info...

    Thanks for the sort of helpful response

    • Bruce's avatar
      Bruce
      Honored Contributor III
      5 years ago

      On the device itself, yes, it's an Ethernet port to accommodate an Ethernet cable.  However, you're networking devices and Ethernet is a vague term.

      A modem has a WAN port, router LAN ports and Mouth is correct about LAG.  Some call it a switched port.

      I don't believe you need a second IP address.  Perhaps a switch off the WAN port and then a router and computer off the switch.  Cheaper than subscribing to a second IP address.