300-510 · Question #302
Refer to the exhibit. ISP_1 uses OSPF and LDP in the backbone. Client_A and Client.B are in the same VRF_Shared. An iBGP session with address family VPNv4 is established between R6 and R14. After a…
The correct answer is A. Set the network 13.13.13.1 0.0.0.0 area 0 command under the OSPF configuration on R13. When R13 was replaced its loopback (13.13.13.1/32) was not injected into the OSPF underlay, so downstream LDP peers never learned a label for it (and MPLS paths toward Client B’s loopback likewise broke). Advertising that loopback into OSPF with a network 13.13.13.1 0.0.0.0…
Question
Refer to the exhibit. ISP_1 uses OSPF and LDP in the backbone. Client_A and Client.B are in the same VRF_Shared. An iBGP session with address family VPNv4 is established between R6 and R14. After a recent replacement of router R13, Client_A has lost its connection to Client_B. A network engineer must troubleshoot the connection from R1 to R23 via ISP_1. Which action must the engineer take to correct the problem?
Exhibit
Options
- ASet the network 13.13.13.1 0.0.0.0 area 0 command under the OSPF configuration on R13.
- BSet the ip cef command under the global configuration on R6.
- CSet the next-hop-self command under the BGP configuration on R6.
- DSet the mpls label mode vrf VRF_Shared command under the global configuration on R13.
How the community answered
(16 responses)- A69% (11)
- B19% (3)
- C6% (1)
- D6% (1)
Explanation
When R13 was replaced its loopback (13.13.13.1/32) was not injected into the OSPF underlay, so downstream LDP peers never learned a label for it (and MPLS paths toward Client B’s loopback likewise broke). Advertising that loopback into OSPF with a network 13.13.13.1 0.0.0.0 area 0 statement ensures the prefix is in the RIB, gets a label via LDP and restores the end-to- end MPLS-VPN connectivity. Exam Questions, Study Guides, Practice Tests. Lead the way to help you pass any IT Certification exams, 100% Pass Guaranteed or Full Refund. Especially Cisco, Microsoft, CompTIA, Citrix, EMC, HP, Oracle, VMware, Juniper, Check Point, LPI, Nortel, EXIN and so on. Our Slogan: First Test, First Pass. Help you to pass any IT Certification exams at the first try. You can reach us at any of the email addresses listed below. Any problems about IT certification or our products, you could rely upon us, we will give you satisfactory answers in 24 hours.
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