What address will be used as the router ID for the OSPFv3 process?
In OSPFv3 (Open Shortest Path First version 3), the router ID is used to uniquely identify each router within the OSPFv3 routing domain.
The router ID is a 32-bit value and is typically represented in dotted decimal notation.
In OSPFv3, the router ID is determined in the following order of priority:
1. Manual configuration: If the router ID is manually configured, OSPFv3 will use that configured value as the router ID. This configuration can be done using a command such as:
`router-id `
2. Highest IPv4 address on a loopback interface: If no manual configuration is set, OSPFv3 will choose the highest IPv4 address assigned to a loopback interface (if present) as the router ID. Loopback interfaces are logical interfaces that are assigned IP addresses and do not rely on physical hardware.
3. Highest IPv4 address on an active interface: If no loopback interface is present, OSPFv3 will select the highest IPv4 address configured on any active (up and running) interface as the router ID.
It is important to note that OSPFv3 uses IPv6 addresses for its routing protocol, including the router ID. The IPv6 address format provides a much larger address space compared to IPv4, allowing for more unique router IDs.
To view the configured router ID on a router running OSPFv3, you can use the following command in the router’s command-line interface:
`show ipv6 ospf`
This will display information about the OSPFv3 process, including the router ID being used.
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