CCIE Lab Exam Questions & Answers 2023/2024

CCIE Lab Exam Questions & Answers 2023/2024 AS_PATH access list - ANSWER-A Cisco IOS configuration tool, using the ip as-path access-list command, that defines a list of statements that match the AS_PATH BGP path attribute using regular expressions. AS_PATH - ANSWER-A BGP path attribute that lists ASNs through which the route has been advertised. The AS_PATH includes four types of segments: AS_SEQ, AS_SET, AS_CONFED_SEQ, and AS_CONFED_SET. Often, this term is used synonymously with AS_SEQ. administrative weight - ANSWER-A Cisco-proprietary BGP feature. The administrative weight can be assigned to each NLRI and path locally on a router, impacting the local router's choice of the best BGP routes. The value cannot be communicated to another router. LOCAL_PREF - ANSWER-A BGP path attribute that is communicated throughout a single AS to signify which route of multiple possible routes is the best route to be taken when leaving that AS. A larger value is considered to be better. AS_PATH length - ANSWER-A calculation of the length of the AS_PATH PA, which includes 1 for each number in the AS_SEQ, 1 for an entire AS_SET segment, and possibly other considerations. MULTI_EXIT_DISC (MED) - ANSWER-A BGP path attribute that allows routers in one AS to set a value and advertise it into a neighboring AS, impacting the decision process in that neighboring AS. A smaller value is considered better. Also called the BGP metric. private AS - ANSWER-A BGP ASN whose value is between 64,512 and 65,535. These values are not assigned for use on the Internet, and can be used for private purposes, typically either within confederations or by ISPs to hide the ASN used by some customers. What does setting the community to LOCAL AS do? - ANSWER-A reserved value for the BGP COMMUNITY path attribute that implies that the route should not be advertised outside the local confederation sub-AS.