Refer to the exhibit. During ISP router maintenance, the network produced many alerts because of the flapping interface. Which configuration on R1 resolves the issue?
A: Doesn't exist as a command
B: Doesn't exist as a command
C:snmp trap ip verify drop-rate
Example:
Router(config-if)# snmp trap ip verify drop-rate
Configures the router to send an SNMP notification when the Unicast RPF drop rate exceeds the configured threshold.
C doesn't solve our problem as its sending SNMP traps/alerts
D: We turn off the traps
Option correct is D: Because, D is necesary while execute maintanance windows. The option A is wrong, because that command is for uRPF: muRPF is a security feature that helps limit or even eliminate spoofed IP packets on a network.
This is accomplished by examining the source IP address of an ingress packet and determining whether it is valid. If it is valid, the packet will be forwarded. If it is not valid, the packet
Chapter 22: Infrastructure Security 853
will be discarded. Note that CEF (Cisco Express Forwarding) must be enabled on the IOS
device for uRPF to work
Example:
Router(config)# ip verify drop-rate notify hold-down 60
Configures the minimum time, in seconds, between Unicast RPF drop-rate notifications.
The range is from 30 to 300. The default is 300.
"https://www.cisco.com/c/en/us/td/docs/ios-xml/ios/sec_data_urpf/configuration/xe-3s/sec-data-urpf-xe-3s-book/sec-urpf-mib-xe-3s.html"
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