No DHCP and no config mannual?

If a device wants to communicate with another device and if there is no DHCP server on the network and the manual configuration of the address is not possible, how the two devices on the same link will communicate?

For IPv4, many devices turned on DHCP will be self-configuring address 169.254.0.0/16 when they can't get a DHCP lease. That's enough for them to have basic connectivity on a single subnet for peer-to-peer networks.

For IPv6, all the devices will be automatically configure a fe80: / 16 link-local address that will allow Basic on the same subnet connectivity regardless of whether DHCP is enabled or not. If IPv6 is enabled at all, this option will be available.

Tags: Cisco Support

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