You definitely need to be RFC 1918 if you are using routing protocols. For example, if you are using networks that belong to other companies you could cause routing problems for yourself and the other company. RFC 1918 is something you should always follow.
Dig Deeper on Network protocols and standards
Related Q&A from Joel Johnson
Have a question for an expert?
Please add a title for your question
Get answers from a TechTarget expert on whatever's puzzling you.