Exam Code: 400-201 (Practice Exam Latest Test Questions VCE PDF)
Exam Name: CCIE SP Written v4.0
Certification Provider: Cisco
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Q31. Refer to the exhibit. A customer is running IS-IS within a network and is using BGP as a CE-PE routing protocol. Which action allows CE1 to get the subnet 10.10.2.0/24 over the CE1-PE1 link, regardless of whether there is a flap in the MPLS link or backdoor link? 

A. Configure the neighbor <PE1-IP>weight 33768 command on CE1 under the BGP process. 

B. Configure the distance bgp 115 200 200 command on CE1 under the BGP process. 

C. Configure the distance 30 ip command on CE1 under the IS-IS process. 

D. Configure the distance bgp 115 200 200 command on CE2 under the BGP process. 

E. Configure the neighbor <PE1-IP>weight 33768 command on CE2 under the BGP process. 

Answer: B 


Q32. An engineer has just configured IOS-XR with out-of-band MPP. Which are the three results that will occur? (Choose three.) 

A. Management traffic to RP from all non-MPP interfaces is dropped 

B. RP/DRP Ethernet Interfaces are not default out-of-band interfaces. 

C. MPP configuration changes doesn’t affect active sessions established before the changes 

D. Interfaces configured for out-of-band MPP are still part of global routing/forwarding 

E. If MPP is disabled and a protocol is activated, all interfaces cannot pass traffic 

F. LPTS will provide rate limiting 

Answer: A,C,F 

Explanation: https://supportforums.cisco.com/document/93456/asr9000xr-local-packet-transport-services-lpts-copp 


Q33. What is the PPMP label used for? 

A. for the ingress replication model with BIDIR-PIM in an overlay model 

B. only for the inter-AS mVPN models that use mLDP 

C. for the partitioned mVPN model with PIM signaling in an overlay model 

D. only for unicast over MPLS VPN 

E. for all the default MDT and mVPN models 

Answer: D 

Explanation: http://lostintransit.se/tag/bgp/ 

https://tools.ietf.org/html/draft-rosen-l3vpn-mvpn-mspmsi-08#section-3.2.2.1 


Q34. Which are the two purposes of the MPLS label value 1? (Choose two.) 

A. it is used for MPLS OAM packets. 

B. it indicates an implicit null label. 

C. it is used for VPNv6 packets. 

D. it is used to carry the QoS value in the label stack. 

E. it indicates an explicit null label. 

F. it indicates a router alert label. 

Answer: C,F 

Explanation: http://www.cisco.com/c/en/us/support/docs/multiprotocol-label-switching-mpls/mpls/4649-mpls-faq-4649.html#qa3 

http://www.iana.org/assignments/mpls-label-values/mpls-label-values.xhtml 

IPv4 Explicit NULL Label ----> 0 

Router Alert Label ----> 1 

IPv6 Explicit NULL Label -----> 2 

Implicit NULL Label -----> 3 

OAM Alert Labe -----> 14 


Q35. Due to recent acquisitions, a company’s MPLS infrastructure is growing very quickly. Concerns arise about labeling each and every IP address on the P router. Which command would significantly reduce the label allocations without compromising LDP functionalities? 

A. ip prefix-list List1 deny prefix/prefix_length 

! 

mpls ldp label 

allocate global prefix-list List1 

B. mpls ldp label 

allocate global host-routes 

C. access-list 1 permit subnet wildcard 

mpls ldp neighbor neighbor_ip labels accept 3 

D. mpls ldp password required for 10 

access-list 10 permit host_ip_1 

access-list 10 permit host_ip_2 

access-list 10 permit host_ip_n 

Answer: A 


Improved 400-201 torrent:

Q36. A network engineer is responsible for implementing a solution with Cisco IOS XR Software that ensures continuous forwarding during a control plane failure. Which two technologies should the engineer consider? (Choose two.) 

A. IP FRR 

B. NSR 

C. graceful restart 

D. BFD 

E. TE FRR 

Answer: B,C 


Q37. Which QoS DiffServ mode preserves the original customer IP marking besides of on egress PE router uses the DSCP value of this IP packet on outbound queuing? 

A. MPLS PHB mode 

B. Pipe mode 

C. IntServ mode 

D. Uniform mode 

E. Short-Pipe mode 

Answer: E 


Q38. SSO was configured on a Cisco ASR 1006 Router by using two RPs. When the main RP failed, a service disruption occurred. What are two reasons that the SSO did not work? (Choose two.) 

A. The standby RP has a different DRAM configuration than the primary RP. 

B. HSRP and NSF are not configured. 

C. The ESP that is installed in the Cisco ASR 1006 Router does not support SSO. 

D. The standby RP was not ready to switch over when the primary RP failed. 

E. The standby RP has a different IOS version than the primary RP. 

Answer: B,E 

Explanation: 

http://www.cisco.com/c/en/us/td/docs/routers/asr1000/configuration/guide/chassis/asrswcfg /High_Availability.html 


Q39. MPLS Service Providers use Route Distinguishers and Route Targets as methods to control routing for customer VRFs. Which two statements are true about Route Distinguishers and Route Targets? (Choose two.) 

A. Route Targets are values that are used by a PE router to uniquely identify a VRF within its local MP-BGP VPNv4 table. 

B. Route Distinguishers are used by PE routers by exporting and importing routes into a local VRF. 

C. Route Targets are used by PE routers to define how to import and export prefixes into a local VRF database. 

D. Route Targets are extended communities that are used by MP-BGP to identify routes as they are advertised to neighbor PE routers. 

E. Route Distinguishers are values that are used by a PE router to uniquely identify a VRF within its local MP-BGP VPNv4 table. 

Answer: C,E 


Q40. A MPP has been implemented in a Cisco IOS-XR device. Which are the two results that will occur? (Choose two.) 

A. If MPP is disabled and a protocol is activated, all interfaces cannot pass traffic 

B. MPP configuration changes doesn't affect active sessions established before the changes 

C. RP/DRP Ethernet Interfaces are not default out-of-band interfaces 

D. Management traffic to RP from all non-MPP interfaces is dropped 

E. Interfaces configured for out-of-band MPP are still part of global routing/forwarding 

Answer: B,D