Practice Free 300-410 Exam Online Questions
Refer to the exhibit.
An engineer observes that every time the ICMP packet is lost at a polling interval, track 1 goes down, which causes unnecessary disruption and instability in the network. The engineer does not want the traffic to be rerouted if the loss of ICMP packets is negligible. If the packet loss is persistent for a longer duration, the track must go down and the traffic must be rerouted.
Which action resolves the issue?
- A . Change the IP SLA schedule to run only at certain intervals.
- B . Increase the threshold value from 1000 to 1500.
- C . Increase the timeout value from 1000 to 1500
- D . Define a delay timer under track 1.
Refer to the exhibit.
An engineer configured IP SLA to monitor a next hop on a router for reachability When the next hop is unreachable, the router is executing tracking and failing over another route, but packet loss is experienced because the reachability is flapping.
Which action resolves the issue?
- A . Append delay up 0 down Ovto the track command
- B . Increase the timeout of the sla probe to 6000
- C . Append delay up SO down 60vto the track command
- D . Increase the frequency of the sla probe to 60.
C
Explanation:
IP SLA (Internet Protocol Service Level Agreement) is a feature that allows you to measure network performance such as latency, jitter, packet loss, and so on. In this case, it’s being used to monitor the reachability of a next hop on a router123.
When the next hop is unreachable, the router is executing tracking and failing over to another route. However, packet loss is experienced because the reachability is flapping. This could be due to the router switching back and forth between the primary and backup routes too quickly.
To resolve this issue, you can introduce a delay in the tracking process. This can be done by appending a delay to the track command. Option C suggests appending a delay of 50 seconds for the up state and 60 seconds for the down state45. This means that the router will wait for 50 seconds before declaring the tracked object as up (reachable) and 60 seconds before declaring it as down (unreachable). This delay can help prevent the router from switching routes too quickly, thus reducing the chances of reachability flapping and packet loss45.
Reference: Configure ISP Failover with Default Routes Using IP SLA Tracking – Cisco
Using IPSLA to change routing – Cisco Community
How to Use IP SLA Technology to Assess WAN Performance
Reliable Static Routing with IP SLA – NetworkLessons.com
Configuring Static Route Tracking using IP SLA (Basic)
A newly installed spoke router is configured for DMVPN with the ip mtu 1400 command.
Which configuration allows the spoke to use fragmentation with the maximum negotiated TCP MTU over GRE?
- A . ip tcp adjust-mss 1360
crypto ipsec fragmentation after-encryption - B . ip tcp adjust-mtu 1360
crypto ipsec fragmentation after-encryption - C . ip tcp adjust-mss 1360
crypto ipsec fragmentation mtu-discovery - D . ip tcp adjust-mtu 1360
crypto ipsec fragmentation mtu-discovery
A
Explanation:
https://www.cisco.com/c/en/us/support/docs/security/dynamic-multipoint-vpn-dmvpn/111976-dmvpn-troubleshoot-00.html
Refer to the exhibit.
EIGRP adjacency between router A and router C is not working as expected Which two configurations resolve the issue? (Choose two)
A)
B)
C)
D)
E)
- A . Option A
- B . Option B
- C . Option C
- D . Option D
- E . Option E
Refer to the exhibit.
An engineer is trying to redistribute OSPF to BGP, but not all of the routes are redistributed.
What is the reason for this issue?
- A . By default, only internal routes and external type 1 routes are redistributed into BGP
- B . Only classful networks are redistributed from OSPF to BGP
- C . BGP convergence is slow, so the route will eventually be present in the BGP table
- D . By default, only internal OSPF routes are redistributed into BGP
D
Explanation:
If you configure the redistribution of OSPF into BGP without keywords, only OSPF intra-area and inter-area routes are redistributed into BGP, by default.
You can redistribute both internal and external (type-1 & type-2) OSPF routes via this command:
DRouter(config-router)#redistribute ospf 1 match internal external 1 external 2‖
Reference: https://www.cisco.com/c/en/us/support/docs/ip/border-gateway-protocol-bgp/5242-bgp-ospf-redis.html
Refer to the exhibit.
An engineer implemented CoPP but did not see OSPF traffic going through it.
Which configuration resolves the issue?
- A . ip access-list extended OSPF permit ospf any any
- B . policy-map COPP class OSFP police 8000 conform-action transmit exceed-action transmit violate-action drop
- C . control-plane service-policy input COPP
- D . class-map match-all OSFP match access-group name OSPF
Refer to the exhibit.
An engineer configured NetFlow but cannot receive the flows from R1.
Which two configurations resolve the issue? (Choose two)
A)
B)
C)
D)
E)
- A . Option A
- B . Option B
- C . Option C
- D . Option D
- E . Option E
Which protocol is used in a DMVPN network to map physical IP addresses to logical IP addresses?
- A . BGP
- B . LLDP
- C . EIGRP
- D . NHRP
A DMVPN single hub topology is using IPsec + mGRE with OSPF.
What should be configured on the hub to ensure it will be the designated router?
- A . tunnel interface of the hub with ip nhrp ospf dr
- B . OSPF priority to 0
- C . route map to set the metrics of learned routes to 110
- D . OSPF priority greater than 1
D
Explanation:
By default, the priority is 1 on all routers so we can set the OSPF priority of the hub to a value which is greater than 1 to make sure it would become the DR.
A network administrator is troubleshooting a failed AAA login issue on a Cisco Catalyst c3560 switch. When the network administrator tries to log in with SSH using TACACS+ username and password credentials, the switch is no longer authenticating and is failing back to the local account.
Which action resolves this issue?
- A . Configure ip tacacs source-interface GigabitEthernet 1/1
- B . Configure ip tacacs source-ip 192.168.100.55
- C . Configure ip tacacs-server source-ip 192.168.100.55
- D . Configure ip tacacs-server source-interface GigabitEthernet 1/1