300-510 Online Practice Questions and Answers

Refer to the exhibit.

XR1 and XR2 are sending the prefix 10.11.11.0/24 to XR3. A configured policy on XR1 is incorrectly prepending AS path 11 11 12 12 onto this prefix. A network operator wants to add a policy onto XR3 that will not allow the falsely prepending prefix from being installed.

Which policy configuration applied to the XR3 neighbor configuration for XR1 can accomplish this requirement without impact to other or future received routes?

A. Option A

B. Option B

C. Option C

D. Option D

Refer to the exhibit.

A network operator must inject a Level 1 route from XR2 (10.16.16.0/24) into the ISIS topology.

Which configuration allows the injection in a way that XR3 and XR1 have a valid and working route for 10.16.16.0/24?

A. Option A

B. Option B

C. Option C

D. Option D

After an engineer configures BGP in R1, it starts receiving this message Jun 29 13:30:50.122: %BGP-5-ADJCHANGE: neighbor 192.168.10.1 Down User reset Jun 29 13:30:52.341: %BGP-3-NOTIFICATION: sent to neighbor 192.168.10.1 2/6 (unacceptable hold time) 0 bytes Which action makes the peering come back up again?

A. Make a soft reset to the peer.

B. Set up a minimum hold-down timer higher.

C. Set up a hello timer higher.

D. Set up a hold-down timer higher.

Refer to the exhibit.

An engineer applied the configuration on R1 to prevent network 192.168.1.0/24 from being propagated outside of area 5. After the change, users have reported they are not able to access any of the application servers that were working before. While checking the routing table of the peer router, the engineer notices R1 stopped propagating any routes outside area 5. Which action must be taken to fix the problem?

A. Change the prefix-list action to permit and add an explicit deny statement for network 192.168.1.0/24

B. Add a permit statement for 0.0.0.0/0 le 32 to the end of the prefix-list to override the implicit deny

C. Reconfigure the filter-list statement to apply in the inbound direction

D. Configure an additional filter-list on R1 for inbound traffic to allow external routes into area 5

Refer to the exhibit.

Network connectivity between bank A and bank B has been lost Users at bank A and bank B are able to successfully reach their directly connected PE routers.

All routers in OSPF area 0 are correctly advertising and learning routing updates.

Which action resolves the issue?

A. Enable next-hop-self under the iBGP peering configuration on routers PEI and PE2

B. Configure the P routers to redtstnbute BGP routes within OSPF area 0.

C. Configure router PI to advertise the IP prefix of PEI.

D. Configure MPLS with an end-to-end label-switched path on each router.

Refer to the exhibit.

After configuring IS-IS on routers R1 and R2, an engineer notices that only the loopback interface at 2000:1::1 /96 is known to router R2. Which change must be made so that only Loopback2 is advertised from R1 to R2?

A. Configure the router isis area1 command under the Loopback0 interface on R1.

B. Remove the advertise passive-only command under the IS-IS address family ipv6 configuration

C. Remove the ipv6 router isis area1 command under the Loopback2 interface on R1.

D. Remove the passive-interface Loopback0 command under the router isis area1 configuration.

Refer to the exhibit.

An MPLS core network has connectivity issues R4 has failed. It impacts traffic loss between R1 and R8. Customers report no access to their file servers, which delays their transformation work. Which quick action resolves the issue until R4

recovers?

A. Implement Link and Node protection on routers R2 and R7.

B. Disable traffic engineering so that traffic prefers the IGP path

C. Enable MPLS fast reroute on router R1 and Link and Node protection on router R2.

D. Configure IBGP full mesh for faster convergence.

Refer to the exhibit.

Router R1 is expected to receive routes that originate from AS 65547 only. However, R1 is receiving routes from AS 65547 and several other ASs that are directly attached to it. Which change to the AS path permit filter corrects the problem?

A. Change the regular expression to ^$.

B. Change the regular expression to ^65547$.

C. Change the regular expression to .*.

D. Change the regular expression to _65547_.

Refer to the exhibit.

A network consultant is updating the company's MPLS solution and configuring several new PE devices to enable full communication among PE devices connected to the network. The updates must ensure the redundancy and scalability of the network. The egress LSR is configured with mpls ldp explicit-null. While configuring the given PE router to be adjacent to the egress LSR, the consultant notices that MPLS forwarding is not working in the network. Which action resolves the issue?

A. Open TCP and UDP ports 179.

B. Configure Cisco Express Forwarding on all routers in the MPLS network.

C. Configure MVRF on all routers in the MPLS network.

D. Open TCP and UDP ports 464.

CORRECT TEXT

R2

A. Check the answer in the explanation

B. Placeholder

C. Placeholder

D. Placeholder