Implementing Cisco Enterprise Advanced Routing and Services (300-410 ENARSI)
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Exam Code
300-410
Exam Name
Implementing Cisco Enterprise Advanced Routing and Services (300-410 ENARSI)
Questions
642 Questions Answers With Explanation
Update Date
06, 04, 2026
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Cisco 300-410 Sample Question Answers
Question # 1
Refer to the exhibit. An engineer is trying to log in to R1 via R3 loopback address. Which
action resolves the issue?
A. Add transport input SCP B. Add transport input none C. Remove the IPv6 traffic filter from R1, which is blocking the Telnet. D. Remove the IPv6 traffic from R1, which is blocking the SSH
Answer: C
Question # 2
A customer is running an mGRE DMVPN tunnel over WAN infrastructure between hub and
spoke sites. The existing configuration allows NHRP to add spoke routers automatically to
the multicast NHRP mappings. The customer is migrated the network from IPv4 to the IPv6
addressing scheme for those spokes’ routers that support IPv6 and can run DMVPN tunnel
over the IPv6 network. Which configuration must be applied to support IPv4 and IPv6
DMVPN tunnel on spoke routers?
A. Tunnel mode ipv6ip 6to4 B. Tunnel mode ipv6ip isatap C. Tunnel mode ipv6ip auto-tunnel D. Tunnel mode ipv6ip 6rd
Answer: C
Question # 3
IPv6 is enabled in the infrastructure to support customers with an IPv6 network over WAN
and to connect the head office to branch offices in the local network. One of the customers
is already running IPv6 and wants to enable IPv6 over the DMVPN network infrastructure
between the headend and branch sites. Which configuration command must be applied to
establish an mGRE IPv6 tunnel neighborship?
A. tunnel protection mode ipv6 B. ipv6 unicast-routing C. ipv6 nhrp holdtime 30 D. tunnel mode gre multipoint ipv6
Answer: D Explanation: The command “tunnel mode gre multipoint ipv ” sets the encapsulation mode of the tunnel to mGRE IPv6.
Question # 4
Which MPLS value is combined with the IP prefix to convert to a VPNv4 prefix?
A. 16-byte Route Distinguisher B. 8-byte Route Target C. 16-byte Route Target D. 8-byte Route Distinguisher
Answer: D
Question # 5
Which two solutions are used to overcome a flapping link that causes a frequent label
binding
exchange between MPLS routers? (Choose two)
A. Create link dampening on links to protect the session. B. Increase input queue on links to protect the session. C. Create targeted hellos to protect the session. D. Increase a hold-timer to protect the session. E. Increase a session delay to protect the session.
Answer: A,C Explanation:
Explanation
To avoid having to rebuild the LDP session altogether, you can protect it. When the LDP
session
between two directly connected LSRs is protected, a targeted LDP session is built between
the two
LSRs. When the directly connected link does go down between the two LSRs, the targeted
LDP session
is kept up as long as an alternative path exists between the two LSRs.
For the protection to work, you need to enable it on both the LSRs. If this is not possible,
you can
enable it on one LSR, and the other LSR can accept the targeted LDP Hellos by
configuring the
command mpls ldp discovery targeted-hello accept.
Reference: https://www.ccexpert.us/mpls-network/mpls-ldp-session-protection.html
Or from the reference
at https://www.ciscolive.com/c/dam/r/ciscolive/us/docs/2019/pdf/5eU6DfQV/TECMPL3201.pdf
Troubleshooting LDP Issues
Problem:
I. When a link flaps (for a short time),
…
Solution:
+ When LDP session supported by link hello is setup, create a targeted hello to protect the
session.
Question # 6
What is a function of the IPv6 DHCP Guard feature for DHCP messages?
A. Only access lists are supported for matching traffic. B. All client messages are always switched regardless of the device role. C. It blocks only DHCP request messages. D. If the device is configured as a DHCP server, no message is switched.
Answer: B
Question # 7
Which 0S1 model is used to insert an MPLS label?
A. between Layer 5 and Layer 6 B. between Layer 1 and Layer 2 C. between Layer 3 and Layer 4 D. between Layer 2 and Layer 3
Answer: D
Question # 8
What are the two prerequisites to enable BFD on Cisco routers? (Choose two)
A. A supported IP routing protocol must be configured on the participating routers. B. OSPF Demand Circuit must run BFD on all participating routers. C. ICMP must be allowed on all participating routers. D. UDP port 1985 must be allowed on all participating routers. E. Cisco Express Forwarding and IP Routing must be enabled on all participating routers.
Answer: C,E
Question # 9
Which mechanism provides traffic segmentation within a DMVPN network?
An engineer received a ticket about a router that has reloaded. The monitoring system
graphs show different traffic patterns between logical and physical interfaces when the
router is rebooted. Which action resolves the issue?
A. Configure the snmp ifindex persist command globally. B. Clear the logical interfaces with snmp ifindex clear command C. Configure the snmp ifindex persist command on the physical interfaces. D. Trigger a new snmpwalk from the monitoring system to synchronize interface OlDs
Answer: A
Question # 11
Which feature is used by LDP in the forwarding path within the MPLS cloud?
A. IP forwarding B. TTL C. TDP D. LSP
Answer: D
Question # 12
How is VPN routing information distributed in an MPLS network?
A. The top level of the customer data packet directs it to the correct CE device B. It is established using VPN IPsec peers. C. It is controlled using of VPN target communities. D. It is controlled through the use of RD.
A network administrator added a new spoke site with dynamic IP on the DMVPN network.
Which configuration command passes traffic on the DMVPN tunnel from the spoke router?
A. ip nhrp registration ignore B. ip nhrp registration no-registration C. ip nhrp registration dynamic D. ip nhrp registration no-unique
Answer: D
Question # 14
Which function does LDP provide in an MPLS topology?
A. It enables a MPLS topology to connect multiple VPNs to P routers. B. It provides hop-by-hop forwarding in an MPLS topology for LSRs. C. It exchanges routes for MPLS VPNs across different VRFs. D. It provides a means for LSRs to exchange IP routes.
Answer: B
Explanation:
LDP provides a standard methodology for hop-by-hop, or dynamic label, distribution in an
MPLS
network by assigning labels to routes that have been chosen by the underlying Interior
Gateway
Protocol (IGP) routing protocols. The resulting labeled paths, called label switch paths
(LSPs), forward
label traffic across an MPLS backbone to particular destinations.
Reference: https://www.cisco.com/c/en/us/td/docs/ios-xml/ios/mp_ldp/configuration/12-
4t/mp-ldp12-4t-book.pdf
Question # 15
A customer requested a GRE tunnel through the provider network between two customer
sites using loopback to hide internal networks. Which configuration on R2 establishes the
tunnel with R1?
A. R2(config)# interface Tunnel 1 R2(config-if)# ip address 172.20.1.2 255.255.255.0 R2(config-if)# ip mtu 1400 R2(config-if)# ip tcp adjust-mss 1360 R2(config-if)# tunnel source 192.168.20.1 R2(config-if)# tunnel destination 192.168.10.1 B. R2(config)# interface Tunnel 1 R2(config-if)# ip address 172.20.1.2 255.255.255.0 R2(config-if)# ip mtu 1400 R2(config-if)# ip tcp adjust-mss 1360 R2(config-if)# tunnel source 10.10.2.2 R2(config-if)# tunnel destination 10.10.1.1 C. R2(config)# interface Tunnel 1 R2(config-if)# ip address 172.20.1.2 255.255.255.0 R2(config-if)# ip mtu 1500 R2(config-if)# ip tcp adjust-mss 1360 R2(config-if)# tunnel source 192.168.20.1
R2(config-if)# tunnel destination 10.10.1.1 D. R2(config)# interface Tunnel 1 R2(config-if)# ip address 172.20.1.2 255.255.255.0 R2(config-if)# ip mtu 1500 R2(config-if)# ip tcp adjust-mss 1360 R2(config-if)# tunnel source 10.10.2.2 R2(config-if)# tunnel destination 10.10.1.1
Answer: D
Question # 16
What is an MPLS LDP targeted session?
A. session between neighbors that are connected no more than one hop away B. LDP session established between LSRs by exchanging TCP hello packets C. label distribution session between non-directly connected neighbors D. LDP session established by exchanging multicast hello packets
Answer: C
Question # 17
An engineer is creating a policy that overrides normal routing behavior.if the route to a
destination of
10.100.100.0/24 is withdrawn from the routing
Table, the policy must direct traffic to a next hop of 10.1 1.1. if the route is present in the
routing table, then
normal forwarding must occur. Which
configuration meets the requirements?
A. access-list 100 permit ip any any
!
route-map POLICY permit 10
match ip address 100
set ip next-hop recursive 10.1.1.1 B. access-list 100 permit ip any 10.100.100.0 0.0.0.255 ! Route-map POLICY permit 10 match ip address 100 set ip default next-hop 10.1.1.1 C. access-list 100 permit ip any 10.100.100.0 0.0.0.255 ! route-map POLICY permit 10 match ip address 100 set ip next-hop 10.1.1.1 ! route map POLICY permit 20 D. access-list 100 permit ip any 10.100.100.0 0.0.0.255 ! route map POLICY permit 10 match ip address 100 Set ip next-hop recursive 10.1.1.1 !
route-map POLICY permit 20
Answer: D
Question # 18
An engineer creates a Cisco DNA Center cluster with three nodes, but all the services are
running on one host node. Which action resolves this issue?
A. Restore the link on the switch interface that is connected to a cluster link on the Cisco DNA Center B. Click the master host node with all the services and select services to be moved to other hosts C. Enable service distribution from the Systems 360 page. D. Click system updates, and upgrade to the latest version of Cisco DNA Center.
Answer: C
Explanation: To deploy Cisco DNA Center on a three-node cluster with High Availability
(HA) enabled, complete the
following procedure:
Step 1: Configure Cisco DNA Center on the first node in your cluster…
Step 2: Configure Cisco DNA Center on the second node in your cluster…
Step 3: Configure Cisco DNA Center on the third node in your cluster…
Step 4: Enable high availability on your cluster:
a. In the Cisco DNA Center GUI, click and choose System Settings. The System 360 tab is
displayed
by default.
b. In the Hosts area, click Enable Service Distribution.
After you click Enable Service Distribution, Cisco DNA Center enters into maintenance
mode. In this
mode, Cisco DNA Center is unavailable until the redistribution of services is completed.
You should
take this into account when scheduling an HA deployment.
Reference: https://www.cisco.com/c/en/us/td/docs/cloud-systems-management/networkautomationandmanagement/dna-...
Therefore we can choose “Enable Service Distribution” to distribute services to other host
nodes.
Question # 19
The network administrator configured CoPP so that all HTTP and HTTPS traffic from the
administrator device located at 172.16 1.99 toward the router CPU is limited to 500 kbps.
Any traffic that exceeds this limit must be dropped.
access-list 100 permit ip host 172.16.1.99 any
!
class-map CM-ADMIN
match access-group 100
!
policy-map PM-COPP
class CM-ADMIN police 500000 conform-action transmit
!
interface E0/0
service-policy input PM-COPP
CoPP failed to capture the desired traffic and the CPU load is getting higher.
Which two configurations resolve the issue? (Choose two.)
A. interface E0/0 no service-policy input PM-COPP ! control-plane service-policy input PM-COPP B. policy-map PM-COPP class CM-ADMIN no police 500000 conform-action transmit police 500 conform-action transmit ! control-plane service-policy input PM-COPP C. no access-list 100 access-list 100 permit tcp host 172.16.1.99 any eq 80 D. no access-list 100 access-list 100 permit tcp host 172.16.1.99 any eq 80 access-list 100 permit tcp host 172.16.1.99 any eq 443 E. policy-map PM-COPP class CM-ADMIN no police 500000 conform-action transmit police 500 conform-action transmit
Answer: A
Question # 20
How do devices operate in MPLS L3VPN topology?
A. P and associated PE routers with IGP populate the VRF table in different VPNs. B. CE routers connect to the provider network and perform LSP functionality C. P routers provide connectivity between PE devices with MPLS switching. D. P routers support PE to PE VPN tunnel without LSP functionality
Answer: C
Question # 21
How does LDP operate in an MPLS network?
A. When topology changes occur such as a router failure, LDP generates peer discovery messages that terminate the LDP season to propagate an LSP change. B. When an adjacent LSR receives LDP discovery messages. TCP two-way handshake ensures that the LDP session has unidirectional connectivity. C. Peer routers establish the LDP session, and the LDP neighbors maintain and terminate the session by exchanging messages D. LDP notification messages allow LERs to exchange label information to determine the next hops within a particular LSP.
Answer: D
Question # 22
A CoPP policy is applied for receiving SSH traffic from the WAN interface on a Cisco
ISR4321 router.
However, the SSH response from the router is abnormal and stuck during the high link
utilization. The
problem is identified as SSH traffic does not match in the ACL. Which action resolves the
issue?
A. Rate-limit SSH traffic to ensure dedicated bandwidth. B. Apply CoPP on the control plane interface. C. Increase the IP precedence value of SSH traffic to 6. D. Apply CoPP on the WAN interface inbound direction.
Answer: B Explanation:
Explanation
The problem is “SSH traffic does not match in the ACL” and “CoPP policy is applied for
receiving SSH
traffic from the WAN interface” so we should apply CoPP on the control plane interface
instead.
Question # 23
Users report issues with reachability between areas as soon as an engineer configured
summary routes between areas in a multiple area OSPF autonomous system. Which action
resolves the issue?
A. Configure the summary-address command on the ASBR. B. Configure the summary-address command on the ABR. C. Configure the area range command on the ABR. D. Configure the area range command on the ASBR.
Answer: C Explanation:
For OSPF, we can only summary at the ABR with the command “area range” or at the
ASBR with the command “summary-address” -> Therefore answer A and answer B are not
correct.
In this question, the most likely problem is that when doing summarization, the network
mask is configured wrong and summarization doesn’t work because of the
misconfiguration. When configuring the area range command, make sure that the
summarization mask is in the form of a prefix mask rather than a wildcard mask (that is,
255.255.255.0 instead of 0.0.0.255).
Good reference: https://www.configrouter.com/troubleshooting-route-summarization-ospf14082/
Question # 24
The network administrator must implement IPv6 in the network to allow only devices that
not only have registered IP addresses but are also connecting from assigned locations.
Which security feature must be implemented?
A. IPv6 Snooping B. IPv6 Destination Guard C. IPv6 Prefix Guard D. IPv6 Router Advertisement Guard
Answer: A
Question # 25
When configuring Control Plane Policing on a router to protect it from malicious traffic, an
engineer observes that the configured routing protocols start flapping on that device. Which
action in the Control Plane Policy prevents this problem in a production environment while
achieving the security objective?
A. Set the conform-action and exceed-action to transmit initially to test the ACLs and transmit rates and apply the Control Plane Policy in the output direction B. Set the conform-action and exceed-action to transmit initially to test the ACLs and transmit rates and apply the Control Plane Policy in the input direction C. Set the conform-action to transmit and exceed-action to drop to test the ACLs and transmit rates and apply the Control Plane Policy m the input direction D. Set the conform-action to transmit and exceed-action to drop to test the ACLs and transmit rates and apply the Control Plane Policy m the output direction
Answer: B
Feedback That Matters: Reviews of Our Cisco 300-410 Dumps
Horácio BeltrãoJun 11, 2026
The devil is in the small things. You really have to know your show commands cold. not only what they do, but also how to interpret each output line. The troubleshooting scenarios are no joke. The command cheat sheet from MyCertsHub was my best friend.
Victor CoxJun 10, 2026
Engineers are distinguished from button pushers by this exam. You'll appreciate how well it tests real skills if you use BGP and OSPF every day in a real network. The labs on MyCertsHub prepared me for the worst.
Victor CoxJun 10, 2026
Engineers are distinguished from button pushers by this exam. You'll appreciate how well it tests real skills if you use BGP and OSPF every day in a real network. The labs on MyCertsHub prepared me for the worst.
Connor MillerJun 09, 2026
It had the atmosphere of a Cisco trivia contest. Too many questions about small feature differences and obscure edge-case syntax. I can troubleshoot a network in my sleep, but memorizing every knobs and bolts for the test was frustrating. MyCertsHub had the facts, but I can't say I enjoyed it.
Khalil RobertsJun 09, 2026
The lab scenarios provided by MyCertsHub are spot-on. Finding the missing piece in the puzzle is the main focus of the exam. The multi-hop BGP and redistributions labs on the site were perfect prep. If you can solve those under time pressure, the actual exam feels familiar.
Sirish MasterJun 08, 2026
I've been a network engineer for 8 years. I thought I was an expert. This test made me feel like a fraud. The questions are meant to deceive you. Even the MyCertsHub material, which is good, couldn't prepare me for the mind games.
Horácio Beltrão
Victor Cox
Sirish Master