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I know before PC10 can ping PC11 it will use IPv6 Neighbor Discovery to resolve the Destination MAC address for layer 2 header. But what would the DEST MAC ADDR be and what topics can I learn this

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I know before PC10 can ping PC11 it will use IPv6 Neighbor Discovery to resolve the Destination MAC address for layer 2 header.

When PC10 wants to send something to PC11, it already knows that PC11 is on a different network, so it does not try to find the layer-2 address of PC11. The IPv6 packet will be encapsulated in a layer-2 frame using the gateway layer-2 address it received from the router RAs.

The router will strip off the layer-2 frame to route the IPv6 packet to the next interface, where it will build a new layer-2 frame for the new network to encapsulate the IPv6 packet.

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  • what would the DEST MAC ADDR be
    – s3lectstar
    Dec 3, 2022 at 19:06
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    Please read my answer: "The IPv6 packet will be encapsulated in a layer-2 frame using the gateway layer-2 address it received from the router RAs."
    – Ron Maupin
    Dec 3, 2022 at 19:31
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    As far as PC10 is concerned, PC 11 may be on the moon or another galaxy as it will never know its MAC address and it does not care what it is. MAC addresses are only significant on the Local Network. Once traffic leaves the local network, the gateway and any other routing hops in the path take over local interface and layer 2 resolution/lookups etc. Dec 3, 2022 at 22:44

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