Layer 3 Technologies

A network engineer is troubleshooting a DMVPN Phase 3 hub-and-spoke topology. Spoke routers are Cisco IOS devices running EIGRP as the routing protocol. The engineer wants to ensure that spoke-to-spoke traffic does not go through the hub after the initial path setup, and that spoke routers can dynamically form direct tunnels. Which NHRP command must be configured on the hub to enable this behavior?

A network engineer is configuring a static route on a Cisco IOS router to reach the network 192.168.2.0/24 via the next-hop address 10.1.1.2. The engineer enters the command 'ip route 192.168.2.0 255.255.255.0 10.1.1.2'. However, the route does not appear in the routing table. What is the most likely reason?

A network engineer is configuring OSPFv3 on a Cisco router. The router has two interfaces in Area 0: GigabitEthernet0/0 (IPv6 address 2001:db8:1::1/64) and GigabitEthernet0/1 (IPv6 address 2001:db8:2::1/64). After enabling IPv6 unicast routing and configuring OSPFv3 with the router-id 1.1.1.1, the engineer notices that no OSPFv3 neighbors are forming. Which action is most likely to resolve the issue?

A network engineer is configuring policy-based routing (PBR) on a Cisco IOS router. The engineer wants to route traffic from subnet 10.1.1.0/24 to a specific next-hop 192.168.1.1, while all other traffic uses the default route. The engineer configures a route map named PBR with a match statement for the subnet and a set statement for the next-hop, and applies it to the inbound interface of the subnet. However, traffic from 10.1.1.0/24 is still following the default route. What is the most likely reason?

A network engineer is configuring MPLS Layer 3 VPN on a Cisco IOS XR router. The engineer needs to ensure that customer routes are properly propagated across the MPLS core. Which two of the following are required to establish the VPNv4 peering between PE routers? (Choose two.)

A network engineer is configuring EIGRP on a Cisco router. The router has two interfaces: GigabitEthernet0/0 with IP address 10.1.1.1/24 and GigabitEthernet0/1 with IP address 10.2.2.1/24. The engineer wants to advertise both networks into EIGRP AS 100. Which configuration command is required to enable EIGRP on the interfaces?

A network administrator is troubleshooting an OSPFv3 network. Routers R1 and R2 are in the same area and on the same broadcast segment, but they are not forming an adjacency. The administrator verifies that the interfaces are up and IPv6 addresses are configured correctly. Which command should be used to check if OSPFv3 is enabled on the interfaces?

A network engineer is configuring a route map for BGP policy. The engineer wants to match routes that originate from AS 65001 and have a community value of 100:200. The route map should then set the local preference to 200. Which configuration snippet accomplishes this?

A network engineer is configuring policy-based routing (PBR) on a Cisco router. The router has two interfaces: GigabitEthernet0/0 (LAN) and GigabitEthernet0/1 (WAN). The engineer wants to route traffic from the 192.168.1.0/24 subnet to a next-hop of 10.1.1.2, and all other traffic should follow the default routing table. Which two steps are required to implement this? (Choose two.)

A network engineer is implementing MPLS Layer 3 VPNs. The engineer needs to configure a PE router to exchange VPNv4 routes with other PE routers. Which BGP configuration is required to enable the exchange of VPNv4 routes?

A network engineer is configuring a GRE tunnel between two Cisco routers across an ISP network. The tunnel source is GigabitEthernet0/0 (IP 203.0.113.1) and the tunnel destination is 203.0.113.2. The engineer notices that the tunnel interface is up, but no traffic is passing through it. The engineer suspects a routing issue. Which command should be used to verify that the tunnel endpoint is reachable?

A network engineer is configuring OSPF on a router with three interfaces: Gi0/0 (10.1.1.1/24), Gi0/1 (10.2.2.1/24), and Gi0/2 (10.3.3.1/24). The engineer wants to prevent OSPF from forming adjacencies on Gi0/2 while still advertising the 10.3.3.0/24 network into OSPF. Which configuration accomplishes this?

A network technician is configuring a static route on a Cisco IOS router. The requirement is to forward all traffic destined to the 192.168.1.0/24 network to the next-hop IP address 10.1.1.1. Which command accomplishes this?

A network engineer is implementing policy-based routing (PBR) on a Cisco IOS router. The engineer wants to route traffic from the 10.1.1.0/24 subnet to a next-hop of 192.168.1.1, while all other traffic uses the default routing table. Which configuration correctly implements this?

A network engineer is configuring OSPFv3 on a Cisco IOS XE router. The router has two interfaces: GigabitEthernet0/0 in Area 0 and GigabitEthernet0/1 in Area 1. The engineer wants to ensure that the router acts as an ABR and that inter-area routes are summarized. Which command must be configured under the OSPFv3 router configuration mode to enable ABR functionality?

A network technician is configuring a static route on a Cisco router. The technician wants to ensure that the static route is only used when the primary route is unavailable. Which type of static route should be configured?

A network engineer is implementing MPLS Layer 3 VPN on a Cisco IOS-XE router. The engineer needs to configure the PE router to exchange VPNv4 routes with other PE routers. Which address family must be configured under the BGP routing process to enable VPNv4 route exchange?

A network administrator is troubleshooting an EIGRP named mode configuration on a Cisco IOS XE router. The router is not forming an adjacency with a neighbor. The administrator verifies that the AS number is 100, the K-values are default, and authentication is not configured. Which command should be used to verify the EIGRP hello and hold timers on the interface?

A network administrator is implementing MPLS Layer 3 VPNs. The administrator wants to ensure that customer routes are not leaked between different VRFs on the same PE router. Which mechanism should be used to isolate the VRFs?

A network engineer is configuring a static route on a Cisco IOS router to reach the network 10.1.1.0/24 via the next-hop 192.168.1.1. The engineer wants the route to be removed from the routing table if the next-hop becomes unreachable. Which command should be used?

A network engineer is deploying OSPFv3 in an IPv6 network. The engineer wants to enable OSPFv3 on a router and ensure that it can form adjacencies with neighbors. Which two commands are required on the router to enable OSPFv3 globally and on an interface? (Choose two.)

A network engineer is implementing Policy-Based Routing (PBR) on a Cisco IOS router. The engineer wants to route traffic from subnet 10.10.10.0/24 to a next-hop of 192.168.2.2, but only for HTTP traffic (TCP port 80). Which configuration sequence is required?

A network engineer is configuring Policy-Based Routing (PBR) on a Cisco router. The goal is to forward all HTTP traffic (TCP port 80) from the 10.1.1.0/24 subnet to next-hop 192.168.2.1. Which configuration sequence is correct?

A network administrator is troubleshooting an EIGRP adjacency that is stuck in the ACTIVE state. The adjacency is between two routers, R1 and R2, on a point-to-point link. The administrator notices that R1 is sending queries but not receiving replies. Which of the following is the most likely cause?

A network administrator is troubleshooting a DMVPN Phase 3 network using OSPF. Spoke routers are not learning routes from other spokes despite having a full mesh of tunnels. The hub is configured with 'ip nhrp redirect' and spokes with 'ip nhrp shortcut'. Which action is most likely to resolve the issue?

A network administrator is troubleshooting a route redistribution issue on a Cisco router running both EIGRP and OSPF. The router is redistributing EIGRP routes into OSPF, but the routes are not appearing in the OSPF domain. The administrator has configured redistribution with a seed metric of 20. Which additional configuration is required to ensure the routes are advertised?

A network engineer is configuring a static route on a Cisco IOS router. The engineer wants the route to be used only if the primary route fails. Which command should be used to configure a floating static route?

A network engineer is configuring OSPF on a Cisco router. The router has two interfaces in Area 0: GigabitEthernet0/0 (10.1.1.1/24) and GigabitEthernet0/1 (10.2.2.1/24). The engineer wants to ensure that the router ID is always 10.1.1.1, regardless of interface status. Which command should be used?

A network technician is configuring a static route on a Cisco router to reach a remote network. The technician wants the route to be used only if the primary path fails. Which type of static route should be configured?

A network engineer is configuring OSPF on a Cisco router. The router has three interfaces in Area 0, and the engineer wants to ensure that the router does not become a Designated Router (DR) on any of these interfaces. Which command should be used on each interface?

A network administrator is troubleshooting an OSPFv3 network. Router R1 is configured with the following: ipv6 unicast-routing interface GigabitEthernet0/0 ipv6 address 2001:DB8:1::1/64 ipv6 ospf 1 area 0 ipv6 ospf network point-to-point ! router ospf 1 router-id 1.1.1.1 ! R1 is not forming an adjacency with R2, which is configured with: interface GigabitEthernet0/0 ipv6 address 2001:DB8:1::2/64 ipv6 ospf 1 area 0 ipv6 ospf network broadcast ! router ospf 1 router-id 2.2.2.2 What is the most likely reason for the adjacency failure?

A network engineer is deploying MPLS Layer 3 VPNs. The engineer must ensure that the PE routers can forward VPN traffic correctly. The following configuration is applied on a PE router: ip vrf CUSTOMER rd 65000:1 route-target export 65000:1 route-target import 65000:1 ! interface GigabitEthernet0/1 ip vrf forwarding CUSTOMER ip address 192.168.1.1 255.255.255.0 After configuration, the engineer notices that the CE router cannot reach remote sites. The MPLS core is operational, and MP-BGP is configured. What is the most likely missing configuration?

A network administrator is configuring a GRE tunnel between two Cisco routers to transport IPv6 traffic over an IPv4-only core. The administrator enters the following configuration on Router A: interface Tunnel0 ipv6 address 2001:DB8:100::1/64 tunnel source 10.1.1.1 tunnel destination 10.2.2.2 tunnel mode gre ipv6 However, the tunnel interface remains down. What is the most likely cause?

A network engineer is configuring OSPF on a router with three interfaces: GigabitEthernet0/0 (10.1.1.1/24), GigabitEthernet0/1 (10.2.2.1/24), and Loopback0 (192.168.1.1/24). The engineer wants to ensure that the router ID is 192.168.1.1 and that it remains stable even if the Loopback0 interface flaps. Which command should be applied?

A network engineer is troubleshooting a DMVPN Phase 3 network using OSPF. Spoke routers are unable to form OSPF adjacencies with each other directly, even though they can reach the hub. The engineer wants to enable direct spoke-to-spoke communication. Which configuration is required on the hub?

A network engineer is implementing policy-based routing (PBR) on a Cisco router. The goal is to route traffic from a specific subnet to a next-hop IP address that is not directly connected. Which configuration is required to achieve this?

A network engineer at a branch office is configuring OSPFv3 on a dual-stack router. The router must form an adjacency with a neighboring router that is also running OSPFv3. The engineer notices that the neighbor relationship remains in EXSTART state. Which command should be used to verify the OSPFv3 interface parameters that could cause this issue?

An engineer configures a Cisco IOS router with two static routes to the 10.10.0.0/16 network: one via 192.168.1.1 with administrative distance 1, and another via 192.168.2.1 with administrative distance 200. The route via 192.168.1.1 is installed in the routing table. Later, the interface to 192.168.1.1 goes down. Which statement describes the router's behavior?

A network engineer is configuring OSPF on a router that connects to a service provider via a WAN link. The provider requires that the link be treated as a point-to-point connection without DR/BDR election, and the OSPF network type must be explicitly set to achieve this. Which command should be applied to the interface?

A network engineer is configuring OSPFv3 on a router that connects to an IPv6 network. The router must form an adjacency with a neighbor on the same segment, but the engineer notices that the router is not sending any OSPFv3 Hello packets. The interface is up, and IPv6 unicast routing is enabled globally. Which of the following is the most likely cause?

A network engineer is configuring OSPFv3 on a dual-stack router. The router must form an adjacency with a neighbor over a link that supports both IPv4 and IPv6. The interface is configured with 'ipv6 ospf 1 area 0' and the router ID is manually set to 10.1.1.1. After applying the configuration, the engineer notices that the OSPFv3 adjacency remains in EXSTART state. What is the most likely cause?

A network engineer is configuring MPLS Layer 3 VPN on a Cisco router. The engineer wants to ensure that the PE router can forward VPN traffic to the correct CE router based on the route target. Which of the following is required on the PE router?

A network engineer is configuring a static route on a Cisco IOS router to reach a remote network. The engineer wants the route to be used only if the primary path fails and to be removed from the routing table when the primary path is available. Which type of static route should be configured?

A network administrator is troubleshooting a DMVPN Phase 3 deployment using mGRE and IPsec. Spoke-to-spoke communication is not working directly; traffic is flowing through the hub. The administrator verifies that NHRP registrations are successful and that the hub has a route to all spokes. Which two actions are required to enable direct spoke-to-spoke communication? (Choose two.)

A network administrator is troubleshooting an EIGRP network where a router is not receiving all expected routes from a neighbor. The neighbor relationship is established, and the topology table shows only a subset of routes. Which EIGRP feature could be filtering the routes?

An engineer is configuring a GRE tunnel between two Cisco routers. The tunnel source is a physical interface, and the tunnel destination is the remote router's physical interface. After configuration, the tunnel interface is up, but no traffic passes through it. The engineer verifies that the physical interfaces are up and IP connectivity exists between the tunnel endpoints. What is the most likely cause?

Which command correctly configures a static route on a Cisco IOS router to reach the network 172.16.0.0/16 via the next-hop address 10.1.1.1?

A network engineer is configuring MPLS Layer 3 VPN on a Cisco IOS XE router. The engineer needs to enable the provider edge (PE) router to exchange VPNv4 routes with another PE router. Which address family must be configured under the BGP routing process to achieve this?

A network engineer is implementing policy-based routing (PBR) on a Cisco router. The goal is to forward traffic from a specific subnet to a next-hop IP address that is not directly connected, but reachable via a recursive lookup. The engineer configures a route-map with 'set ip next-hop recursive <IP>'. However, traffic is not being forwarded as expected. Which of the following is the most likely reason?

A network engineer is configuring EIGRP on a Cisco router. The router has two paths to the same destination network with different metrics. The engineer wants to enable unequal-cost load balancing. Which command must be configured to allow EIGRP to use the higher-cost path?

A network engineer is configuring OSPFv2 on a multiaccess segment. The engineer wants to ensure that the designated router (DR) election is deterministic and that a specific router becomes the DR. The router has the highest OSPF priority on the segment, but it is not becoming the DR. What could be the reason?

A network administrator is configuring OSPF on a Cisco router. The router is connected to two different OSPF areas: Area 0 and Area 1. The administrator wants to summarize routes from Area 1 into Area 0. Which command should be used on the Area Border Router (ABR) to accomplish this?

A network administrator is troubleshooting an OSPFv3 network. Router R1 is not forming an adjacency with Router R2 over a point-to-point link. The administrator verifies that the interfaces are up, IPv6 addresses are configured, and OSPFv3 is enabled on both interfaces. The output of 'show ipv6 ospf interface' on R1 shows that the interface is in the 'LOOPBACK' state. What is the most likely reason for this state?

A network administrator is troubleshooting a DMVPN Phase 3 network using OSPF as the routing protocol. Spoke routers are not learning routes from other spokes. Which two actions should be taken to resolve this issue? (Choose two.)

A network technician is configuring a Cisco router to forward traffic to a remote network. The technician enters the command 'ip route 172.16.0.0 255.255.0.0 10.0.0.1'. However, the router does not install the route in its routing table. What is the most likely reason?

A network engineer is configuring a GRE tunnel between two routers. The tunnel interface is up, but OSPF neighbors are not forming. The engineer suspects a Layer 3 issue. Which command should be used to verify that the tunnel endpoints are reachable?

A network engineer is configuring a Cisco router to authenticate OSPF neighbors using MD5. The router is connected to two OSPF neighbors on the same subnet. The engineer wants to enable MD5 authentication on the interface with a key ID of 1 and a password of 'Cisco123'. Which command sequence correctly accomplishes this?

A network technician is configuring a Cisco IOS router to authenticate OSPFv2 neighbors using MD5. The technician enters the following commands: interface GigabitEthernet0/0 ip ospf authentication message-digest ip ospf message-digest-key 1 md5 cisco After applying the configuration, the router does not form an adjacency with its neighbor. What is the most likely reason?

A network engineer is troubleshooting a DMVPN Phase 3 deployment on a Cisco IOS XE router. The hub router is configured with 'ip nhrp redirect' and the spoke routers with 'ip nhrp shortcut'. However, spoke-to-spoke traffic is still traversing the hub. Which action should the engineer take to enable direct spoke-to-spoke communication?

A network engineer is configuring EIGRP on a router. The engineer wants to ensure that the router does not send EIGRP updates out of an interface connected to a non-EIGRP neighbor, but still advertises the connected network into EIGRP. Which configuration command should be used?

A network engineer is implementing MPLS Layer 3 VPNs. The engineer wants to ensure that customer routes are propagated across the MPLS core. Which protocol is typically used within the provider core to distribute VPNv4 routes?

A network engineer is configuring policy-based routing (PBR) on a Cisco IOS router. The engineer wants traffic from a specific subnet to be routed via a next-hop IP address that is not directly connected. Which command is required under the route-map configuration?

A network administrator is configuring EIGRP on a router and wants to ensure that only a specific subnet is advertised out of an interface. The router has the following configuration: 'router eigrp 100', 'network 10.0.0.0', 'passive-interface GigabitEthernet0/0'. The administrator wants to advertise 10.1.1.0/24 out of GigabitEthernet0/0 while preventing other subnets from being advertised. Which configuration achieves this?

A network architect is designing a BGP routing policy to influence inbound traffic from an ISP. The architect wants to make a specific prefix less preferred by the ISP by prepending the AS path multiple times. Which BGP attribute should be manipulated to achieve this?

A network engineer is configuring OSPF on a router. The router has an interface with IP address 10.1.1.1/24 and another interface with IP address 192.168.1.1/24. The engineer wants to enable OSPF on both interfaces using a single network command under router ospf 1. Which command accomplishes this?

A network administrator is configuring MPLS Layer 3 VPN on a Cisco IOS XE router. The router is a PE device connected to two CE routers in different VRFs. The administrator wants to prevent routes from one VRF from being leaked into another VRF. Which configuration step is essential to maintain VRF separation?

A network engineer is implementing policy-based routing (PBR) on a Cisco router. The goal is to forward traffic from a specific source subnet to a next-hop that is not the default gateway. The engineer configures a route map with a match statement for the source subnet and a set statement for the next-hop. However, the traffic is still following the default route. What is the most likely reason?

A network engineer is configuring OSPF on a router that connects to a broadcast Ethernet segment. The router is connected to a switch that also connects to three other OSPF routers. The engineer wants to ensure that this router does not become the Designated Router (DR) or Backup Designated Router (BDR) on this segment, but still participates in OSPF. Which configuration should the engineer apply on the router's interface?

A network engineer is implementing route redistribution between OSPF and EIGRP on a Cisco IOS router. The engineer wants to prevent routing loops and ensure that routes redistributed from OSPF into EIGRP are not redistributed back into OSPF. Which mechanism should be used?

A network engineer is implementing CoPP on a Cisco router to protect the control plane from DoS attacks. The engineer wants to rate-limit ICMP echo requests destined to the router's management IP address. Which CoPP policy component is responsible for defining the traffic classification?

A network technician is configuring a Cisco IOS router to authenticate EIGRP neighbors using MD5. The router is running EIGRP AS 10. Which command enables MD5 authentication for EIGRP on an interface?

A network engineer is implementing policy-based routing (PBR) on a Cisco IOS XE router. The router has two interfaces: GigabitEthernet0/0 (LAN) and GigabitEthernet0/1 (WAN). A route-map named PBR-MAP is applied to GigabitEthernet0/0 with the command `ip policy route-map PBR-MAP`. The route-map contains a match statement for access-list 101, which permits traffic from 10.1.1.0/24 to any destination. The set statement is `set ip next-hop 192.168.2.1`. However, traffic from 10.1.1.0/24 is still being routed according to the routing table instead of being forwarded to 192.168.2.1. Which action should the engineer take to ensure PBR is applied?

A network engineer is configuring a Cisco IOS-XE router for DMVPN Phase 3. The engineer wants to ensure that spoke-to-spoke traffic flows directly between spokes without traversing the hub. Which technology should be used to achieve this?

A network engineer is deploying DMVPN Phase 3 with EIGRP as the routing protocol over a hub-and-spoke topology. The hub router is configured with `ip nhrp redirect` on its tunnel interface, and each spoke has `ip nhrp shortcut`. A spoke needs to send traffic to a remote subnet behind another spoke. Which mechanism allows the spoke to install a direct route to the remote spoke's tunnel IP without traversing the hub for every packet?

A network engineer is troubleshooting a Cisco IOS XE router running OSPFv2. The router is an ABR between Area 0 and Area 1. Area 1 is configured as a Not-So-Stubby Area (NSSA). The engineer notices that a Type-7 LSA originated by an ASBR in Area 1 is not being translated into a Type-5 LSA by the ABR. Which condition would prevent the ABR from performing Type-7 to Type-5 translation?

A network engineer is configuring Policy-Based Routing (PBR) on a Cisco IOS-XE router. The engineer wants to route traffic from the 10.1.1.0/24 subnet that is destined for any TCP port 80 to next-hop 192.168.2.1, but only for packets arriving on GigabitEthernet0/1. Other traffic should follow the normal routing table. Which configuration sequence correctly accomplishes this?

A network engineer is configuring a Cisco IOS router to run OSPFv3 for IPv6. The router must form an adjacency with a neighbor on a broadcast network. Which command is required to enable OSPFv3 on an interface?

A network engineer is troubleshooting a DMVPN Phase 3 network using EIGRP as the routing protocol. Spoke routers are unable to establish direct spoke-to-spoke tunnels. The engineer verifies that NHRP registration is successful and that the hub has routes to all spokes. Which action is most likely to resolve the issue?

A network engineer is configuring a Cisco IOS router as a DHCP relay agent. The router's interface GigabitEthernet0/0 is connected to a client subnet, and the DHCP server is located at 10.1.1.100. The engineer wants the router to forward DHCP requests from clients to the server and ensure that the server can assign addresses from the correct pool. Which command is required on the router?

A network engineer is deploying BGP on a Cisco IOS XE router. The router must advertise the network 10.10.0.0/16 to an external peer, but the engineer notices that the prefix is not being advertised even though the network command is configured. The routing table shows that 10.10.0.0/16 is present as two separate /24 routes via OSPF. What is the most likely cause?

A network engineer is configuring MPLS Layer 3 VPN on a Cisco IOS XE router. The engineer wants to enable the router to distribute VPNv4 prefixes to its PE peers. Which command must be configured under the BGP routing process to enable the address family?

A network engineer is troubleshooting a DMVPN Phase 3 network using Cisco IOS XE routers. The hub router is configured with a multipoint GRE tunnel and NHRP. Spoke routers are unable to establish direct spoke-to-spoke tunnels. Which two statements describe the correct operation of DMVPN Phase 3 that could explain the issue? (Choose two.)

A network engineer is configuring a Cisco IOS XE router to support IPv6. The engineer wants to enable IPv6 routing and assign an IPv6 address to an interface. Which command must be configured globally to enable IPv6 routing?

A network engineer is configuring a Cisco IOS XE router as a DHCP relay agent. The router is connected to a LAN segment with DHCP clients and must forward DHCP requests to a DHCP server at 10.1.1.100. Which command must be configured on the LAN interface to enable DHCP relay?

A network engineer is troubleshooting a DMVPN Phase 3 network using Cisco IOS XE routers. Spoke routers are unable to establish direct spoke-to-spoke tunnels. The hub router is configured with 'ip nhrp redirect', and spokes are configured with 'ip nhrp shortcut'. The engineer notices that spoke routers are not receiving NHRP redirect messages from the hub. Which action should be taken to resolve this issue?

A network engineer is troubleshooting a DMVPN Phase 3 network using Cisco IOS XE routers. The hub router (Hub1) has a public IP of 203.0.113.1 and is configured with `tunnel mode gre multipoint`. Spoke routers are behind NAT devices. Spoke1 cannot establish a direct spoke-to-spoke tunnel with Spoke2, although both can reach the hub. Which technology must be enabled on the hub to allow spoke-to-spoke direct tunnels in this scenario?

A network engineer is troubleshooting a BGP routing issue on a Cisco IOS XE router. The router is configured with a route map that sets the local preference for routes learned from a specific neighbor. However, the engineer notices that the local preference is not being applied to routes received from that neighbor. Which BGP configuration command is most likely missing?

A network engineer is troubleshooting an OSPFv3 network. Router R1 is an ABR connected to Area 0 and Area 1. Area 1 is configured as a totally stubby area. R1 is not injecting a default route into Area 1, and routers in Area 1 cannot reach external destinations. Which command should the engineer verify on R1 to ensure that a default route is generated into Area 1?

A network engineer is implementing MPLS Layer 3 VPN on a Cisco IOS XE router. The engineer wants to ensure that customer routes are advertised with the correct route distinguisher (RD) and route target (RT) extended communities. Which BGP address family must be configured to exchange VPNv4 routes between PE routers?

A network engineer is configuring a Cisco IOS XE router for DMVPN Phase 3. The hub router is configured with `ip nhrp map multicast dynamic` and `ip nhrp network-id 100`. The spoke routers are configured with `ip nhrp map` and `ip nhrp nhs`. The engineer wants to enable spoke-to-spoke communication without traffic traversing the hub after the initial resolution. Which additional command is required on the hub to support Phase 3 shortcut switching?

A network engineer is configuring a Cisco IOS XE router for MPLS Layer 3 VPN. The router is a PE connected to a CE via GigabitEthernet0/0. The engineer wants to configure a VRF named CUSTOMER_A and assign the interface to it. The engineer enters the following commands: `vrf definition CUSTOMER_A`, `rd 65000:1`, `address-family ipv4`, `exit`, `exit`. Then, under interface GigabitEthernet0/0, the engineer enters `vrf forwarding CUSTOMER_A`. After entering the command, the engineer notices that the IP address on the interface is removed. What is the most likely reason?

A network engineer is configuring Policy-Based Routing (PBR) on a Cisco IOS XE router. The engineer wants to forward traffic matching a specific ACL to a next-hop IP address, but only if the next-hop is reachable. Which command should be used in the route map to specify the next-hop and enable tracking?

A network engineer is implementing MPLS Layer 3 VPN on a Cisco IOS-XE router. The engineer needs to configure the router to exchange VPNv4 routes with a route reflector. The router is already configured with BGP AS 65001 and has established an IBGP session with the route reflector. Which address family must be activated to support VPNv4 route exchange?

A network engineer is troubleshooting a DMVPN Phase 3 network using Cisco IOS-XE routers. The hub router is configured with `ip nhrp redirect` and spoke routers with `ip nhrp shortcut`. A spoke router is unable to establish a direct spoke-to-spoke tunnel for a specific destination. Which action should the engineer take to resolve this?

A network engineer is troubleshooting a Cisco IOS XE router that is configured with a route map for policy-based routing (PBR). The route map is applied to the ingress interface with `ip policy route-map PBR`. The engineer wants to verify that the PBR is matching traffic and setting the next-hop correctly. Which command provides the most detailed information about PBR matches and actions?

A network engineer is configuring policy-based routing (PBR) on a Cisco IOS XE router. The router has two interfaces: GigabitEthernet0/0 (10.1.1.1/24) and GigabitEthernet0/1 (10.2.2.1/24). The engineer wants traffic from the 10.1.1.0/24 subnet destined to 192.168.1.0/24 to be forwarded out GigabitEthernet0/1 instead of following the routing table, which points to GigabitEthernet0/0. Which configuration sequence correctly implements this requirement?

A network engineer is configuring a Cisco IOS XE router to connect to an ISP via BGP. The engineer wants to influence inbound traffic from the ISP by prepending the router's AS number multiple times to the BGP updates sent to the ISP. Which BGP attribute should the engineer modify to achieve this?

A network engineer is configuring EIGRP for IPv6 on a Cisco IOS XE router. The router has two interfaces: GigabitEthernet0/0 (2001:DB8:1::1/64) and GigabitEthernet0/1 (2001:DB8:2::1/64). The engineer wants to enable EIGRP for IPv6 on both interfaces and ensure that the router forms adjacencies. Which configuration is required?

A network engineer is troubleshooting an MPLS Layer 3 VPN on Cisco IOS XE routers. A customer edge (CE) router is not receiving routes from the provider edge (PE) router. The engineer suspects a VRF configuration issue. Which two commands should the engineer use to verify the VRF routing table and the BGP VPNv4 address family? (Choose two.)

A network engineer is configuring policy-based routing (PBR) on a Cisco IOS XE router. The router has two interfaces: GigabitEthernet0/0 (LAN) and GigabitEthernet0/1 (WAN). The engineer wants all HTTP traffic from the 10.1.1.0/24 subnet to be routed via next-hop 192.168.2.2 instead of the default route. The engineer creates a route map named PBR with sequence 10, matches an ACL that permits TCP port 80 from 10.1.1.0/24, and sets the next-hop to 192.168.2.2. The route map is applied to interface GigabitEthernet0/0 with the command `ip policy route-map PBR`. However, traffic still follows the default route. Which action will fix the problem?

A network engineer is troubleshooting a flapping OSPFv2 adjacency between two Cisco IOS-XE routers on a broadcast segment. The log shows repeated %OSPF-5-ADJCHG messages with reason 'Dead timer expired'. The engineer confirms that both routers are in Area 0, have identical hello/dead intervals, and are not configured with authentication. Which action most likely resolves the issue?

A network engineer is configuring route redistribution between EIGRP and OSPF on a Cisco IOS-XE router. The engineer wants to prevent routing loops and ensure that only specific EIGRP routes are redistributed into OSPF. Which combination of tools should the engineer use?

A network engineer is configuring a GRE tunnel between two Cisco IOS-XE routers to transport multicast traffic. The engineer notices that multicast packets are not being forwarded through the tunnel. Which action should the engineer take to enable multicast over the GRE tunnel?

A network engineer is deploying DMVPN Phase 3 with OSPF over the tunnel interface. The hub router must summarize all spoke routes into a single /24 prefix before advertising them into the corporate OSPF domain. The engineer configures `area 0 range 10.10.0.0 255.255.255.0` on the hub's ABR. After applying the configuration, spoke routes are still advertised individually. Which action resolves the issue?

A network engineer is configuring VRF-lite on a Cisco IOS router to segment traffic for two customers. The engineer creates VRF CUSTA and assigns interface GigabitEthernet0/1 to it. The engineer then configures a static route within VRF CUSTA to reach 10.10.10.0/24 via next-hop 192.168.1.1. However, the route does not appear in the VRF CUSTA routing table. Which command is missing?

A network engineer is configuring EIGRP on a Cisco IOS XE router. The router is connected to two different autonomous systems: AS 100 and AS 200. The engineer wants to redistribute routes from AS 100 into AS 200. Which two statements are true regarding EIGRP redistribution? (Choose two.)

A network engineer is implementing BGP on a Cisco IOS XE router. The router is peering with an ISP and receives a full BGP table. The engineer wants to influence inbound traffic from the ISP by making a specific prefix more preferred. The engineer has configured a route map that sets the MED to 50 for the prefix 203.0.113.0/24 and applies it outbound to the ISP. However, the ISP still prefers a different path. Which BGP attribute should the engineer manipulate to influence inbound traffic more effectively?

A network engineer is configuring a GRE tunnel between two Cisco IOS XE routers, R1 and R2, to transport IPv6 traffic over an IPv4 network. The tunnel source is R1's GigabitEthernet0/0 interface (IPv4 address 10.1.1.1) and the tunnel destination is R2's GigabitEthernet0/0 interface (IPv4 address 10.2.2.2). The engineer configures the tunnel interface with IPv6 address 2001:DB8:1::1/64 and enables OSPFv3 on the tunnel interface. However, OSPFv3 adjacencies are not forming. What is the most likely cause?

A network engineer is troubleshooting a dual-stack Cisco IOS XE router that runs OSPFv3 for IPv6 and OSPFv2 for IPv4. IPv4 adjacencies form and routes are exchanged, but no OSPFv3 adjacencies form and no IPv6 routes appear. The engineer verifies that the interfaces have IPv6 addresses and that `ipv6 unicast-routing` is enabled. Which configuration step is most likely missing?

A network engineer is configuring BGP on a Cisco IOS XE router. The router has two eBGP peers: ISP-A and ISP-B. The engineer wants to influence outbound traffic so that the router prefers ISP-A for all destinations unless ISP-A fails. Which BGP attribute should the engineer manipulate, and how?

A network engineer is configuring policy-based routing (PBR) on a Cisco IOS XE router. The engineer wants traffic from subnet 10.1.1.0/24 to be forwarded to next-hop 192.168.2.1, while all other traffic uses the default routing table. The engineer configures a route map and applies it to the ingress interface with `ip policy route-map PBR`. However, traffic from 10.1.1.0/24 is still following the default route. Which action should the engineer take to ensure PBR is applied?