You will encounter conflicts ONLY if you are connecting to a network that is using your same address space. See more below.
The private IP addresses that you assign for a private network (inter-office LAN, Internet Service Provider customer bases, campus networks, etc) should fall within the following three blocks of the IP address space:
10.0.0.1 to 10.255.255.255, which provides a single Class A network of addresses, which would use subnet mask 255.0.0.0.
(theoretically up to 16,777,215 addresses, good for VERY large enterprises like internet service providers or other global deployment)
172.16.0.1 to 172.31.255.254, which provides 16 contiguous Class B network addresses, which would use subnet mask 255.255.0.0.
(theoretically up to 1,048,576 addresses, good for large enterprises like colleges and governmental organizations)
192.168.0.1 to 192.168.255.254, which provides up to 2^16 Class C network addresses, which would use subnet mask 255.255.255.0.
(theoretically up to 65,536 addresses, widely used by default in consumer/retail networking equipment)
Explanation of Subnet masks, Network classes, and other technical info is readily available on the internet.
This document is an early notification of a behaviour change that will be introduced in IOS XR release 6.5.
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