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  • Run Router on Dual IPv4/IPv6 Mode if ISP is IPv4 Only?

    Posted on Nathan Parker Comment on the AskWoody Lounge

    Home Forums Networking – routers, firewalls, network configuration Run Router on Dual IPv4/IPv6 Mode if ISP is IPv4 Only?

    • This topic has 1 reply, 2 voices, and was last updated 3 months ago.
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      • #2169604 Reply
        Nathan Parker

        I’m moving from my ISP-supplied router to a Cisco Small Business router in March so I can take back over management of my LAN. My ISP currently only supports IPv4 (I’ve confirmed this with an IPv6 test).

        I know the Cisco router can support dual IPv4/IPv6 mode, or I can disable IPv6 mode and run the router in IPv4 mode only.

        Is there any reason to run the Cisco router in dual IPv4/IPv6 mode if my ISP supports IPv4 only, or should I disable IPv6 on the router and run it solely in IPv4 mode? Is it “cleaner” to run it in IPv4 only mode, or is enabling dual IPv4/IPv6 good to prepare for the future?


        Nathan Parker

      • #2169639 Reply
        Paul T
        AskWoody MVP

        The router will talk to your ISP and set up whatever mode is supported. You don’t need to change anything for this to happen.

        cheers, Paul

        1 user thanked author for this post.
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    Reply To: Run Router on Dual IPv4/IPv6 Mode if ISP is IPv4 Only?

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