What is the significance of the command "autonomous-system" in global config mode on a router? When I configure routing protocols I have the option of providing the AS number on the router config command, then why is this command there and when is it used?
Number of an autonomous system that identifies the router running routing protocol to other routers running the same routing protocol and tags the routing information passed along.
Like in case of BGP..AS numbers are globally unique numbers that are used to identify ASes, and which enable an AS to exchange exterior routing information between neighboring ASes. An AS is a connected group of IP networks that adhere to a single and clearly defined routing policy.
There are a limited number of available AS numbers. Therefore, it is important to determine which sites require unique AS numbers and which do not. Sites that do not require a unique AS number should use one or more of the AS numbers reserved for private use, which are in the range 64512 - 65535.
Hi everyone, I would like to thank you in advance for any help you can provide a newcomer like myself!
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