this gets it right, and is clear... thanks jeff...
Well-known attributes are either mandatory, meaning that they must be included in all BGP Update messages, or they are discretionary , meaning that they may or may not be sent in a specific Update message.
If an optional attribute is transitive , a BGP process should accept the path in which it is included, even if it doesn’t support the attribute, and it should pass the path on to its peers.
If an optional attribute is nontransitive , a BGP process that does not recognize the attribute can quietly ignore the Update in which it is included and not advertise the path to its other
peers.
network cisco ccna gns3 certification arteq
a network runs through it
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