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  3. 300-540 Exam
  4. Cisco.300-540.v2026-04-02.q62 Dumps
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Question 61

An engineer must implement a solution on a Cisco ASR 1000 Series router to protect against DDoS attacks.
DDoS traffic must be dropped by transmitting Flowspec attributes to edge routers, instructing them to generate an ACL via class-maps and policy-maps. The engineer already configured BGP neighbors. Which action must be taken next?

Correct Answer: A
Comprehensive and Detailed Explanation
BGP Flowspec allows routers to distributetraffic-filtering rulesusing BGP NLRI.
To enable Flowspec, after neighbors are configured, the essential next step is:
#Activate the Flowspec address-family under BGP
Example:
router bgp 65000
address-family ipv4 flowspec
neighbor X.X.X.X activate
exit-address-family
This enables:
* FlowSpec NLRI exchange
* Distribution of drop rules (rate-limit, redirect, null route, etc.)
* Automatic ACL/class-map/policy-map generation on edge routers
Why the other options are incorrect:
* B. Set BGP routing process# already done when neighbors were configured
* C. Activate neighbors# only makes senseinsidean address-family; flowspec AF must be enabled first
* D. Configure route reflector# optional and not required for Flowspec to operate Thus, the correct next step isA. Configure Flowspec for the BGP address-family.
insert code

Question 62

An engineer must enable the highest level of logging when troubleshooting Cisco NFVIS. Which command must be run?

Correct Answer: D
Comprehensive and Detailed Explanation
Cisco NFVIS logging levels (from lowest to highest):
* critical
* error
* warning
* info
* debug#highest verbosity
To capture maximum diagnostic detail, engineers must enabledebuglogging on theoperational log type, which records system activity and runtime behavior.
Thus the correct command is:
system set-log logtype operational level debug
This provides the deepest troubleshooting visibility.
insert code
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