Network

A data center engineer is troubleshooting intermittent connectivity between two servers in different VLANs. The servers are connected to different leaf switches in a VXLAN EVPN fabric. When checking the fabric, the engineer notices that the NVE interface on one leaf is up/up but the VNI for the server VLAN is not listed in 'show nve vni'. What is the most likely cause?

An organization is deploying a new ACI fabric. The design requires that traffic between EPGs in the same bridge domain be allowed by default, but traffic between EPGs in different bridge domains must be denied unless explicitly permitted. Which contract scope configuration meets this requirement?

A network engineer is configuring OSPF on a Cisco Nexus switch for a data center network. The requirement is to ensure that the switch does not become the Designated Router (DR) on a multi-access segment. Which OSPF configuration achieves this?

During a maintenance window, a network engineer plans to upgrade the NX-OS software on a pair of Nexus 9000 switches configured as vPC peers. The engineer wants to minimize traffic disruption. Which upgrade sequence is recommended?

A data center uses Cisco ACI with multiple tenants. The security policy requires that all traffic between EPGs must be explicitly allowed via contracts. However, the operations team reports that communication between two EPGs in the same bridge domain is working even though no contract is applied. What is the most likely reason?

Which TWO statements about VXLAN BGP EVPN control plane are true? (Choose two.)

Which THREE conditions must be met for a Cisco Nexus switch to form a vPC? (Choose three.)

Refer to the exhibit. An engineer is configuring a server-facing interface on a Nexus switch. The server is running VMware ESXi with multiple virtual machines in VLANs 10, 20, and 30. After applying the configuration, the ESXi host reports that it cannot communicate on VLAN 30. Which configuration change should be made?

Refer to the exhibit. A VXLAN VNI (10030) is operationally down. What is the most likely cause?

An engineer is troubleshooting connectivity between two Nexus 9000 switches configured with vPC. The vPC peer link is up, but the vPC peer-keepalive link is failing. Which action should be taken to ensure vPC convergence in the event of a peer-link failure?

A data center design requires Layer 2 extension between two sites using OTV. The network engineer notices that MAC addresses from Site A are not learned at Site B. OTV adjacency is up, and both sites have the same overlay interface configured. Which configuration issue is most likely the cause?

A network engineer is implementing QoS on a Nexus 9000 switch. The requirement is to prioritize storage traffic (iSCSI) and ensure lossless behavior. Which queuing strategy should be applied to the egress interface?

An organization is deploying a new leaf-spine fabric with Cisco ACI. The requirement is to allow inter-tenant communication between two EPGs in different tenants. Which configuration object is necessary to enable this communication?

Which TWO configuration steps are necessary to enable VXLAN EVPN on a Cisco Nexus 9000 switch using the centralized anycast gateway model?

A server connected to Ethernet1/1 is unable to communicate on VLAN 1. The server is configured to send untagged frames. Based on the exhibit, what is the most likely cause?

You are a network engineer at a financial institution. The company has two data centers: DC1 and DC2, connected via a dark fiber link. Each data center has a pair of Nexus 7000 switches in a vPC configuration. The dark fiber link connects to a port on each Nexus 7000 pair using a Layer 2 port-channel. The requirement is to extend VLAN 100 between the two data centers for a critical application that requires a stretched Layer 2 domain. The current configuration has the port-channel on both sides set to mode 'active' with LACP. VLAN 100 is allowed on the trunk. The application servers report intermittent connectivity issues, with some packets being dropped. Upon inspection, you notice that the MAC address table on the Nexus 7000 in DC1 shows the MAC address of the server in DC2 on the dark fiber port-channel interface, but also on a local access port connected to a different server in the same VLAN. What is the most likely cause of the intermittent connectivity?

Arrange the steps to configure a vPC domain on a pair of Cisco Nexus switches.

Arrange the steps to create a service profile template in Cisco UCS Manager.

Match each Cisco data center technology to its primary purpose.

Match each Cisco UCS Manager CLI command to its function.

A network engineer is configuring a VPC peer-link on a Nexus switch. Which interface configuration is required for the peer-link port-channel?

In a VXLAN EVPN fabric, which protocol is used to exchange MAC and IP address reachability information among VTEPs?

A network engineer is troubleshooting an OSPF adjacency issue between two Nexus switches. The neighbors are stuck in the EXSTART state. What is the most likely cause?

Which statement is true about the VLANs carried on a VPC peer-link?

In a centralized anycast gateway VXLAN EVPN design, which is a requirement?

A network engineer notices that when a host sends a packet to a destination on a different VTEP, the packet is flooded to all VTEPs even though the destination MAC is known. What is the most likely cause?

After adding a new spine switch to a VXLAN EVPN fabric with OSPF underlay, some leaf switches experience routing instability. Which action could resolve the instability?

Which command displays the VLANs allowed on a trunk interface?

In a VXLAN EVPN multi-tier design, which feature ensures traffic between leaf switches takes the optimal path without hair-pinning through a spine?

A network engineer is verifying VPC configuration on a pair of Nexus switches. Which two commands should be used to check VPC status and consistency? (Choose two.)

Which three EVPN route types are essential for VXLAN EVPN operation in a typical data center fabric? (Choose three.)

When configuring BGP EVPN on spine switches functioning as route reflectors, which two address families must be configured? (Choose two.)

Refer to the exhibit. What is the current state of the VPC domain?

Refer to the exhibit. Which VLANs are allowed on the VPC peer-link?

Refer to the exhibit. What is the most likely cause of the NVE interface being down?

A network engineer is troubleshooting VXLAN connectivity between two VTEPs. The source VTEP is configured with `nve1` and member VNI 10000. The `show nve peers` command shows the remote VTEP IP but the status is 'Init'. What is a likely cause?

An engineer is designing a Layer 3 network for a data center using OSPF. The core switches are connected to aggregation switches. To optimize convergence, which OSPF network type should be used on the links between core and aggregation?

In an EVPN-VXLAN fabric, a network engineer notices that MAC addresses learned from an external router are not being advertised as EVPN type-2 routes. The external router is connected to a leaf switch via a Layer 3 port. Which additional configuration is needed on the leaf switch?

A data center switch has multiple access ports configured with spanning-tree portfast. A new server is connected to one of these ports and immediately causes a network loop. What is the most likely cause?

A network engineer is configuring a Fabric Extender (FEX) to connect to a parent switch. Which best practice should be followed for FEX host interfaces?

In a vPC domain, a consistency check failure is observed for the vPC keepalive link. What is the impact on the vPC domain operation?

A multicast application requires that all receivers join the same group using PIM sparse mode. Which router is responsible for forwarding traffic from the source to the RP?

An engineer is configuring VXLAN bridging and routing on a Cisco Nexus 9000 switch. Which configuration is required to enable inter-VNI routing?

In a BGP EVPN deployment, route type 2 (MAC/IP advertisement) is used to advertise MAC addresses. What additional information is carried in route type 2 for IP routing?

Which two VXLAN control plane options are supported on Cisco Nexus 9000 switches? (Choose two.)

An OSPF router in a broadcast network has not formed a neighbor relationship. What are three possible causes? (Choose three.)

Which two benefits does EVPN provide compared to traditional VPLS? (Choose two.)

Refer to the exhibit. A network engineer notices that traffic for VNI 10000 is not being encapsulated. What is the most likely reason?

Refer to the exhibit. What is the most likely cause of neighbor 10.1.1.3 being stuck in EXSTART?

Refer to the exhibit. A network engineer has configured a port-channel for OSPF adjacency. What additional configuration is required for the port-channel to operate correctly?

A network engineer is troubleshooting high CPU utilization on a Nexus 9000 switch. Which command is most useful to identify the process consuming the most CPU?

A data center uses VPC between two Nexus switches. Which statement is true about the VPC peer-link?

Which protocol is used by Cisco ACI fabric to distribute endpoint information among spines?

A network engineer is troubleshooting a VXLAN EVPN problem where some endpoints are not reachable. The output of 'show bgp l2vpn evpn' shows Type-3 routes but no Type-2 routes for a specific VNI. What should the engineer check?

A Nexus 9000 switch is configured with VPC. The VPC keepalive link fails. What is the effect on the VPC domain?

In a Cisco ACI fabric, a new EPG is created and associated with a bridge domain that has 'Unicast Routing' enabled. However, endpoints in that EPG cannot communicate with endpoints in other EPGs in the same VRF. What is missing?

An engineer is troubleshooting BGP EVPN control plane. They issue 'show bgp l2vpn evpn' and see Type-3 routes but no Type-2 routes for any VNI. Which condition is most likely?

A network engineer is configuring Cisco Nexus VXLAN with BGP EVPN. The VTEPs are using loopback0 as the NVE source. The physical interfaces are up, but the NVE interface remains down. What is the most likely cause?

In a Cisco ACI fabric, a tenant has multiple bridge domains in the same VRF all with 'Unicast Routing' enabled and hardware proxy mode. However, endpoints in different BDs within the same VRF cannot communicate even with a contract. What is a possible reason?

Which TWO characteristics are true about Cisco VPC? (Choose two)

Which THREE components are part of an EVPN VXLAN fabric? (Choose three)

Which TWO statements are true about Cisco ACI contracts? (Choose two)

Refer to the exhibit. A network engineer notices that the NVE1 interface is up but VXLAN traffic is not being encapsulated. What is the most likely cause?

Refer to the exhibit. A network engineer notices that the VPC peer status is down, and the peer-keepalive is not reachable. Based on the configuration, what is the likely issue?

Refer to the exhibit. A network administrator configured VXLAN EVPN as above. The VTEP can communicate with neighbors on VNI 5001, but cannot reach the default gateway for VNI 5002. What is the problem?

A network engineer is configuring OSPF on a pair of Nexus 9000 switches acting as spine switches in a VXLAN fabric. The engineer needs to ensure that the spine switches do not become the DR for any VLAN. Which configuration should be applied?

An engineer is troubleshooting high CPU utilization on a Nexus 7700 switch. The output of 'show process cpu' shows high usage from the 'netstack' process. Which action should the engineer take to identify the cause?

In a Cisco ACI fabric, the administrator notices that traffic between two endpoints in different EPGs but on the same leaf switch is being dropped when a contract is applied. The endpoints are in the same VRF but different bridge domains. What is the likely cause?

A data center network uses VXLAN EVPN for network virtualization. Which component is responsible for advertising MAC addresses and host routes across the fabric?

During a network upgrade, an engineer applies a new OSPF configuration on a Nexus 9000 spine. After the change, several leaf switches lose connectivity to each other. The engineer examines the logs and sees OSPF adjacency flapping. What is the most likely cause?

An administrator is deploying a new application in a Cisco ACI fabric. The application requires multicast traffic between end hosts. Which configuration is necessary for multicast in ACI?

A network engineer is configuring a VPC on a pair of Nexus 9000 switches. Which command is required to synchronize the configuration between the VPC peers?

An engineer is troubleshooting a BGP EVPN session between a leaf and a spine. The 'show bgp l2vpn evpn summary' output shows the peer state as 'Active'. What does this indicate?

A data center network uses Cisco Nexus switches with VXLAN EVPN. Which two components are essential for VXLAN EVPN operation? (Choose two.)

When troubleshooting a VXLAN EVPN fabric with Cisco Nexus 9000 switches, which three commands provide information about the EVPN operation? (Choose three.)

An engineer is designing a Cisco ACI multi-site solution. Which two considerations are critical for inter-site connectivity? (Choose two.)

A large enterprise data center is deploying a new application using Cisco ACI with a multi-pod design. The application requires low-latency communication between servers in different pods. The network team has configured the ACI fabric with two pods, each connected via inter-pod network (IPN) switches. After deployment, the application experiences intermittent latency spikes and packet loss. The APIC health scores remain high but the latency issue persists. The team has verified the underlay IP connectivity and MTU settings. What is the most likely cause of the latency issues?

A financial services company is migrating its core banking application to a new data center built on Cisco Nexus 9000 switches with VXLAN EVPN. The application requires active-active multihoming for its servers, which are dual-homed to two leaf switches. The network team has configured vPC on the leaf switches for the server connections. After the migration, the application team reports that some packets are being dropped during failover events when one of the vPC member links goes down. The network team confirms that vPC is properly configured and the peer-keepalive is functioning. What is the most likely cause of packet drops during failure?

A mid-size organization is upgrading its data center network to support server virtualization. They have deployed two Nexus 9300 switches as access switches for their server racks. The servers are configured with VLAN tagging and connect to the switches using trunks. The network administrator needs to ensure that the switches can provide default gateway services to the servers to reduce latency. They have configured interface VLAN interfaces and HSRP for redundancy. After implementation, the servers can communicate within the same VLAN but fail to reach the default gateway. The network administrator checks the switch configuration and finds that "ip routing" is not enabled globally. What is the most likely impact of this missing configuration?

A large cloud provider is building a new data center using Cisco ACI with multiple leaf and spine switches. They plan to host thousands of tenants with overlapping IP addresses in different VRFs. The network team has deployed the fabric with a common security policy. During testing, they discover that traffic from Tenant A to Tenant B is being allowed even though a contract should deny it. The APIC policy shows the contract is applied to the EPGs and the deny rule is present. What is the most likely cause of the policy not being enforced?

A network engineer is troubleshooting an OSPF adjacency that fails to reach FULL state between two Nexus 9000 switches. Which TWO are common causes for this issue?

A data center runs OSPF as the underlay for an EVPN-VXLAN fabric. The fabric includes two spine switches and eight leaf switches. After adding a new leaf switch, the network team notices that some EVPN routes are missing from the other leaves. The new leaf has established BGP EVPN sessions to both spines and the BGP sessions are up. The spines report receiving all routes from the new leaf, but the other leaves do not receive certain prefixes. The engineer checks the BGP configuration on the new leaf and sees the address-family l2vpn evpn is configured under router bgp. Which action should the engineer take to resolve the issue?

A large enterprise uses Cisco Nexus 9000 switches in a VXLAN EVPN fabric. The underlay is OSPF. Each leaf switch has a loopback0 interface as the source interface for VXLAN tunnel endpoints. After a maintenance window, an engineer modifies the IP address of loopback0 on leaf-5 from 10.1.1.5/32 to 10.1.1.105/32. Subsequently, all VXLAN tunnels to leaf-5 go down. OSPF adjacencies between leaf-5 and the spines are still FULL. The engineer checks the NVE interface on leaf-5 and sees the source-interface is loopback0 but the interface status is up/up. However, pings from other leaves to 10.1.1.105 fail. What is the most likely cause?

An engineer is troubleshooting a VXLAN network where traffic between two VTEPs in the same VNI is not being forwarded. The underlay network is operational and IP connectivity exists between the VTEPs. Which two actions should the engineer take to verify the VXLAN configuration?

Refer to the exhibit. An engineer configured a VXLAN tunnel endpoint (VTEP) but the VXLAN tunnel is not operational. The underlay OSPF adjacency is established. What is the missing configuration?

An organization has deployed a pair of Nexus 93180YC-EX switches as vPC peers in a data center. The switches are connected to a server with two 10GbE interfaces configured as an LACP port-channel. The vPC configuration has been verified and was working correctly for months. After a scheduled maintenance window that included upgrading the NX-OS software from version 7.0(3)I7(1) to 7.0(3)I7(5), the server begins experiencing frequent link flaps on the port-channel. The server administrator reports that every 5-10 minutes, the link goes down for about 2 seconds and then recovers. The network team checks the logs on the Nexus switches and sees repeated messages: 'LACP-3-MISCONFIG: Port-channel <channel> is misconfigured: partner not on same aggregator.' The 'show vpc brief' output shows all vPCs in the 'up' state. The 'show port-channel summary' shows the port-channel is up with both member ports in the bundle. What is the most likely root cause?