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Cisco 300-630 Sample Question Answers
Question # 1
An engineer must limit local and remote endpoint learning to the bridge domain subnet.
Which action should be taken inside the Cisco APIC?
A. Disable Remote EP Learn B. Enable Enforce Subnet Check C. Disable Endpoint Dataplane Learning D. Enable Limit IP Learning to Subnet
Which action reduces the impact on workload when migrating from the existing Cisco NX-OS VXLAN network infrastructure to the Cisco ACI fabric?
A. Disable bridge domain unicast routing while a default gateway is in VXLAN infrastructure B. Set the default gateway in the Cisco ACI and VXLAN fabrics C. Use ACI spines for the Cisco ACI and VXLAN fabrics D. Configure vPC between the standalone Nexus and the Cisco ACI leaf
What is a use of the Overlay Multicast TEP in Cisco ACI Multi-Site communication?
A. to perform headend replication B. to act as the source IP for BUM traffic C. to establish MP-BGP adjacencies with remote spines D. to send and receive unicast VXLAN data plane traffic
Which two actions should be taken to ensure a scalable solution when multiple EPGs in a
VRF require unrestricted communication? (Choose two.)
A. Configure a taboo contract between the EPGs that require unrestricted communication
between each other. B. Enable Preferred Group Member under the EPG Collection for VRF section. C. Set the VRF policy control enforcement preference to Unenforced. D. Set the EPGs that require unrestricted communication between each other as preferred group members. E. Set the EPGs that require policy enforcement between each other as preferred group members.
An engineer designs a Cisco ACI Multi-Pod solution that requires a pair of active-standby
firewalls in different pods for external connectivity. How should the firewalls be
implemented?
A. PBR for routed firewalls B. separate L3Out peerings for routed firewalls C. routed firewall for the default gateway D. transparent firewalls
A. in the bridge domain VLAN B. in the native VLAN ID C. in the access encapsulation VLAN part of different VLAN pools D. in the VNID that is assigned to the FD VLAN
Which action should be taken in Cisco ACI to reassign a unique globally scoped pcTag to
an EPG that provides a global contract?
A. Configure subnets that are treated as virtual IP B. Configure subnets that advertise externally C. Configure subnets that are shared between VRFs D. Configure subnets that are private to VRF
Which action must be taken to connect two nonsilient servers in active/standby mode to
two ACI leaves?
A. Implement a virtual PortChannel on ACI leaves B. Enable ARP flooding for the bridge domain if the MAC address of the active interface changes after NIC failover C. Configure ARP flooding for the bridge domain if the MAC address of the active interface stays identical after a NIC failover D. Disable dataplane learning to avoid endpoint flapping
An existing Cisco ACI Multi-Site setup with default fabric settings contains endpoints that
communicate with an MTU of 1500. What is the minimum MTU value that must be
supported by the ISN to allow control plane endpoint information exchange between sites?
What are two characteristics of network-centric design in Cisco ACI? (Choose two.)
A. There is open communication between EPGs B. EPGs are used for microsegmentation C. EPGs are different security zones D. Applications define the network requirements E. A bridge domain has one subnet and one EPG
Answer: B,E
Question # 11
What is the advantage of implementing an active-active firewall cluster that is stretched
across separate pods when anycast services are configured?
A. A different MAC/IP combination can be configured for the firewall in each pod. B. The local pod anycast node is preferred by the local spines. C. A cluster can be deployed in transparent mode across pods. D. Local traffic in a pod is load-balanced between the clustered firewalls.
Answer: A
Question # 12
A customer is deploying a new application across two ACI pods that is sensitive to latency
and jitter. The application sets the DSCP values of packets to AF31 and CS6, respectively.
Which configuration changes must be made on the APIC to support the new application
and prevent packets from being delayed or dropped between pods?
A. disable DSCP translation policy B. align the ACI QoS levels and IPN QoS policies C. disable DSCP mapping on the IPN devices D. align the custom QoS policy on the EPG site in the customer tenant
Which firewall connection allows for the integration of service nodes in transparent mode
with a Cisco ACI Multi-Pod setup?
A. active-standby mode across pods B. active-active mode per pods for communication between internal endpoints C. active-standby mode per pods for communication between endpoints and external
networks D. active-active mode across pods
What is a design implication for Cisco ACI using an application-centric approach?
A. Multiple VLANs and/or multiple EPGs are under one bridge domain B. VLAN numbers are in the names of the bridge domain and EPG objects C. One EPG is mapped to multiple bridge domains D. One VLAN equals one EPG equals one bridge domain
Answer: C
Question # 15
Cisco ACI fabric is migrated from network-centric mode to application-centric mode. What
is possible in an application-centric design?
A. remapping of VLAN pools B. migration of bare metal servers to virtual machines C. creation of additional EPGs under one bridge domain D. Cisco ACI VMM integration with hypervisors
Answer: C
Question # 16
An engineer created a Cisco ACI environment in which multiple tenants reuse the same
contract. The requirement is to prevent inter-tenant communication. Which action meets
this requirement?
A. Create the contract in the user tenant with the scope set to VRF and exported to other tenants B. Create the contract in the common tenant with the scope set to Tenant C. Create the contract in the user tenant with the scope set to Global and exported to other tenants D. Create the contract in the common tenant with the scope set to Global
Answer: B
Question # 17
An engineer must implement a full mesh Cisco ACI Multi-Site architecture. Which action
must be taken on each spine to accomplish this goal?
A. Configure BGP-EVPN Router-ID B. Configure Multi-Pod Data-Plane TEP C. Configure Overlay Unicast TEP D. Configure Overlay Multicast TEP
What does the VXLAN source port add to the overlay packet forwarding when it uses the
hash of Layer 2, Layer 3, and Layer 4 headers of the inner packet?
A. ECMP B. TCP optimization C. disabled fragmentation D. jumbo frames
An engineer deployed a Cisco ACI fabric and noticed that the fabric learns endpoints from
subnets that are not configured on a bridge domain. To meet strict security requirements,the engineer must prevent this behavior. Which action must be taken to prevent this
behavior?
A. Activate Enable Data Plane Endpoint Learning B. Implement Pervasive Gateway C. Configure Static Binding D. Enable Enforce Subnet Check
Answer: D
Question # 20
An engineer configures a new Cisco ACI Multi-Site Orchestrator node to join an MSO
cluster. Which two components are necessary to ensure that the new node has IP
connectivity in this configuration? (Choose two.)
A. Cisco ACI spine interfaces that are connected to ISN B. Cisco APICs over the OOB management network C. existing Cisco ACI Multi-Site Orchestrator node D. management IP of ESXi hosts where the controllers are deployed E. OOB interface of ISN
An engineer is implementing the Cisco ACI fabric but is experiencing loops detected fromendpoints. When the issue was investigated, it was discovered that the packets are
received with the same source IP address but from different leaf switch ports. The engineer
must prevent the issue from happening in the future and make sure that the port is brought
back up if it was disabled due to the loop discovered. Which set of actions must be taken to
meet these requirements?
A. Enable the enforce endpoint check and set the Rouge EP detection interval B. Enable the rogue endpoint and set the Error Disabled Recovery Policy C. Enable the remote endpoint limit and set the Interface override D. Enable reverse path forwarding and set the Hold Interval
Answer: B
Question # 22
An organization expands a Cisco ACI Multi-Pod from two to six pods and must ensure that
the control plane scales. What should be configured in the IPN to ensure that BUM traffic is
forwarded efficiently across the IPN?
A. spine headend replication B. BIDIR-PIM C. MP-BGP D. MSDP
An engineer configures a new Cisco ACI Multi-Pod setup. Which action should be taken for
fabric discovery to be successful for the nodes in Pod 2?
A. Select the Route Reflector field in Pod Peering B. Enable the DSCP class-cos translation policy for Layer 3 traffic C. Configure POD 2 Data Plane TEP under the Pod Connection Profile D. Add the IPN subnet under the Fabric External Routing Profile
Answer: D
Question # 24
What is a characteristic of a stretched bridge domain solution between Cisco ACI sites with
Layer 2 flood disabled?
A. The application profile that is associated to the bridge domain have local significance in
each site. B. The tenant and VRF that associated to the bridge domain have local significance in
each site. C. Headend replication is used for BUM traffic between sites. D. IP mobility is ensured between sites for disaster recovery.
Answer: B
Question # 25
What two actions should be taken to deploy a new Cisco ACI Multi-Pod setup? (Choose
two.)
A. Configure anycast RP for the underlying multicast protocol B. Configure the TEP pool of the new pod to be routable across the IPN C. Configure MP-BGP on IPN routers that face the Cisco ACI spines D. Increase interface MTU for all IPN routers to support VXLAN traffic E. Connect all spines to the IPN
Answer: D,E
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