Route Filtering and Route Summarization - Filtering BGP Updates by Matching the AS_PATH PA - The BGP AS_PATH and AS_PATH Segment Types

7 important questions on Route Filtering and Route Summarization - Filtering BGP Updates by Matching the AS_PATH PA - The BGP AS_PATH and AS_PATH Segment Types

What is called AS_PATH prepending?

The process of adding the ASN before advertising to external BGL (eBGP) peers
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What are the delimiters for AS_SEQUENCE and AS_CONFED_SEQ?

Space
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What are the delimiters for AS_SET and AS_CONFED_SET?

Comma
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For AS_SEQUENCE what is the character for enclosing the segment?

None
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For AS_CONFED_SEQ what is the character for enclosing the segment?

()
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FOR AS_CONFED_SET what is the character for enclosing the segment?

{}
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What are examples of delimiters?

Space/Comma
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