NEW QUESTION 1
Which Cisco IOS XR command should be used to identify if MPLS TE FRR is enabled?

• A. show mpls traffic-eng tunnel <tunnel#>
• B. show mpls frr
• C. show mpls traffic-eng protection
• D. show mpls protection
• E. show mpls fast-reroute

Answer: A

Explanation:
The MPLS Traffic Engineering (TE)—Fast Reroute (FRR) Link and Node Protection feature provides link protection (backup tunnels that bypass only a single link of the label-switched path (LSP)), node protection (backup tunnels that bypass next-hop nodes along LSPs), and the following FRR features:
•Backup tunnel support
•Backup bandwidth protection
•Resource Reservation Protocol (RSVP) Hellos
Prerequisites for MPLS Traffic Engineering (TE)—Fast Reroute (FRR) Link and Node Protection
Your network must support the following Cisco IOS features:
•IP Cisco Express Forwarding
•Multiprotocol Label Switching (MPLS)
Your network must support at least one of the following protocols:
•Intermediate System-to-Intermediate System (IS-IS)
•Open Shortest Path First (OSPF)
Before configuring FRR link and node protection, it is assumed that you have done the following tasks but you do not have to already have configured MPLS TE tunnels:
•Enabled MPLS TE on all relevant routers and interfaces
•Configured MPLS TE tunnels

NEW QUESTION 2
Scenario:




On P2IOS-XR router what is targeted LDP hellos hold time on LDP session with 10.0.1.1:0 LDP ID?

• A. 90 sec
• B. 10 sec
• C. 3 sec
• D. 8.6 sec

Answer: A

Explanation:
Issue on P2: show mpls ldp discovery (details). Ps: The command show mpls ldp parameter is not Implemented.
Look at the end, you will see the hello and the holdtime values for the target neighbour. Be careful he is asking for "targeted LDP hellos hold time". No other command will work!!! At the end of the show result you will see something looks like the following:
LDP discovery sources:
Targeted Hello 10.0.2.1 -> 10.0.1.1 active, passive;
Hello: 30 sec
holdtime: 90 sec

NEW QUESTION 3
Which item is not available to be used for QoS classification in Cisco IOS XR?

• A. MAC SA
• B. protocol
• C. inner EXP
• D. discard-class
• E. QoS-group
• F. VLAN

Answer: C

NEW QUESTION 4
Which two protocols facilitate label bindings by neighboring routers? (Choose two.)

• A. IS-IS
• B. LDP
• C. OSPF
• D. EIGRP
• E. BGP

Answer: BE

NEW QUESTION 5
Implementing IPoDWDM interfaces on Cisco CRS routers eliminates the need for which network component?

• A. ROADM
• B. external transponders
• C. electrical-optical-electrical converters
• D. electrical cross-connect

Answer: B

Explanation:
IP over DWDM (IPoDWDM) is a technology used in telecommunications networks to integrate IP Routers and Switches in the OTN (Optical Transport Network).

NEW QUESTION 6
Which affinity value will be matched by the affinity bit mask of the affinity 0xFF00000A mask 0xFFFF000F command?

• A. 0xFFFF000A
• B. 0xFF00EEEA
• C. 0xFF000000
• D. 0x00000000
• E. 0x11110001

Answer: B

Explanation:
0xFF00000A 11111111000000000000000000001010
0xFFFF000F 11111111111111110000000000001111
0xFF00EEEA 11111111000000001110111011101010

NEW QUESTION 7
According to the Intserv model, which two options are traffic-specific parameters? (Choose two.)

• A. token bucket
• B. calculated average queue size
• C. minimum policed unit
• D. traffic marking
• E. rate policing

Answer: AC

NEW QUESTION 8
Which three steps are required to configure QPPB on Cisco IOS XR routers? (Choose three.)

• A. Apply a QPPB route policy to the BGP process using the table-policy command
• B. Apply a QPPB route policy to the BGP neighbor using the route-policy command
• C. Define a QPPB route policy to match the customer routes, then set the IP precedence or qos-group
• D. Define a QPPB route policy to match the customer IP precedence or qos-group markings, then set the BGP community
• E. Enable QPPB on an interface using the ipv4 bgp policy propagation input ip-precedence|qos-group destination|source command
• F. Enable QPPB on an interface using the ipv4 bgp policy propagation output ip- precedence|qos-group destination|source command

Answer: ACE

Explanation:
QoS Policy Propagation via BGP (QPPB), is a mechanism that allows propagation of quality of service (QoS) policy and classification by the sending party based on access lists, community lists and autonomous system paths in the Border Gateway Protocol (BGP), thus helping to classify based on destination instead of source address.

NEW QUESTION 9
Given this configuration of an interface for MPLS traffic engineering on a Cisco IOS XE router:
interface POS1/1/0 mpls traffic-eng tunnels ip rsvp bandwidth 5000
Which option lists the equivalent configurations required on a Cisco IOS XR router?

• A. interface POS1/1/0 mpls traffic-eng tunnels ip rsvp bandwidth 5000
• B. mpls traffic-eng interface POS1/1/0
• C. mpls traffic-eng interface POS1/1/1 bandwidth 5mb
• D. mpls traffic-eng interface POS1/1/0 rsvpinterface POS1/1/0
• E. mpls traffic-eng interface POS1/1/0 rsvpinterface POS1/1/0 bandwidth 5000

Answer: E

NEW QUESTION 10
Which configuration fulfills the requirement of configuring LDP with Cisco Nonstop Forwarding on a router with 5 minutes time to hold the forwarding table information and 1 minute retry timer value for an LDP connection?

• A. mpls ldp graceful-restartgraceful-restart forwarding state-holdtime 5 graceful-restart reconnect-timeout 1 interface GigabitEthernet0/0/0/0!
• B. mpls ldp graceful-restartgraceful-restart forwarding state-holdtime 300 graceful-restart reconnect-timeout 60 interface GigabitEthernet0/0/0/0!
• C. mpls ldp nsrgraceful-restartgraceful-restart forwarding state-holdtime 300 graceful-restart reconnect-timeout 60 interface GigabitEthernet0/0/0/0!
• D. mpls ldp nsrgraceful-restartgraceful-restart forwarding state-holdtime 5 graceful-restart reconnect-timeout 1 interface GigabitEthernet0/0/0/0!

Answer: B

NEW QUESTION 11
Which three commands are used to troubleshoot why IP packets are not forwarded on the LSP? (Choose three.)

• A. show cef prefix/length to check the prefix information
• B. debug mpls ldp transport events to display events related to the LDP peer discovery mechanism
• C. show mpls forwarding labels <label-id> hardware egress location <node-id> to check the hardware label FIB
• D. show arp <prefix> location <node-id> for the next hop prefix
• E. show mpls ldp discovery for the corresponding label information
• F. debug mpls ea platform all to display MPLS setup events and errors

Answer: ACD

NEW QUESTION 12
A customer MPLS domain recently required an excessive time to reconverge In response, a high availability solution will be deployed. Which command set should be issued to improve LDP high availability on IOS XE instances?
A)

B)

C)

D)

• A. Option A
• B. Option B
• C. Option C
• D. Option D

Answer: C

NEW QUESTION 13
Which configuration set enables outbound label filtering so that only peer 192.168.10.1 receives label
advertisements in an MPLS environment?
A)

B)

C)

D)

• A. Option A
• B. Option B
• C. Option C
• D. Option D

Answer: C

NEW QUESTION 14
Which configuration can a network engineer use to establish high availability for LDP in an MPLS setup?

• A. mpls ldpgraceful-restart graceful-restartgraceful-restart forwarding state-holdtime 180 graceful-restart reconnect-timeout 15 interface HundredGigE0/4/0/0
• B. mpls ldp graceful-restartgraceful-restart forwarding state-holdtime 180 graceful-restart reconnect-timeout 15
• C. mpls ldpsession protection for peer_acl duration 60 ipv4 access-list peer_acl10 permit ip host 192.168.10.1 any
• D. router ospf 1 mpls ldp sync mpls ldpigp sync delay 30
• E. mpls ldprouter-id loopback0 discovery hello holdtime 15 discovery hello interval 5

Answer: A

NEW QUESTION 15
When implementing MPLS TE tunnels on Cisco IOS XR routers, what is the tunnel setup and hold priority value range, and which value has the highest priority?

• A. 0-63, where 0 is the highest priority
• B. 0-63, where 63 is the highest priority
• C. 0-7, where 0 is the highest priority
• D. 0-7, where 7 is the highest priority

Answer: C

NEW QUESTION 16
DRAG DROP

• A. Mastered
• B. Not Mastered

Answer: A

Explanation:
Applies the QOS policy to interface—service policy
Defines the PHB qos action for each of the different traffic classes—policy map Defines the making parameters for classifying packets into service classes—class-map
Applies the QOS policy to interface--service policy
Defines the PHB qos action for each of the different traffic classes--policy map Defines the making parameters for classifying packets into service classes--class-map

NEW QUESTION 17
A company is experiencing congestion on Internet T1 links that transport site-to-site IPsec tunnels between head offices. QoS configuration is being modified on these T1 links. Which option describes the result from this QoS configuration?

• A. VPN traffic is unaffected because the inner ToS field is encrypted and hidden from the policy
• B. The physical interface is affected by the new QoS configuration
• C. The internal VPN logical interface reflects the new QoS service policy
• D. IPsec protocol applications work independently of the QoS configuration

Answer: A

NEW QUESTION 18
Which two statements are correct in describing ISP environments that are running IP/MPLS in the core network? (Choose two.)

• A. On the PE routers, each BGP route must use a unique label to reach the BGP next hop.
• B. The BGP next hops point to the PE routers, and only the PE routers are required to run BGP.
• C. A full mesh of IBGP sessions are required between all of the PE and P routers to ensure proper packets forwarding.
• D. The PE and P routers run LDP to learn the labels for reaching the BGP next-hop addresses.

Answer: BD

NEW QUESTION 19
DRAG DROP

• A. Mastered
• B. Not Mastered

Answer: A

Explanation:
1) Build RIB
2) Assign labels
3) Advertise Labels 4)Build LFIB
1) Build RIB
2) Assign labels
3) Advertise Labels
4) Build LFIB

NEW QUESTION 20
Referring to the show output exhibit, which statement is correct?

• A. The P1 router is receiving label information for the 10.0.2.1/32 prefix from two LDP peers.
• B. The P1 router is receiving label information for the 10.7.1.1/32 prefix from two LDP peers.
• C. The P1 router is using the IMP-NULL local label for the 10.7.1.1/32 prefix because 10.7.1.1/32 is the loopback interface IP address on the P1 router.
• D. The P1 router will perform PHP for the 10.7.1.1/32 and 10.7.10.1./32 prefixes.

Answer: B

NEW QUESTION 21
What is the term that is used for the label that an LSR assigns and distributes to other LSRs in MPLS?

• A. Local
• B. Remote
• C. Explicit
• D. Explicit Null
• E. Aggregate

Answer: A

NEW QUESTION 22
At which layer does Cisco recommend the QoS trust boundary be set for an enterprise network environment?

• A. core layer, facing the distribution layer
• B. distribution layer, facing the access layer
• C. access layer, facing the end hosts
• D. distribution layer, facing the core layer

Answer: C

NEW QUESTION 23
What is a crucial LDP default operating behavior?

• A. LDP uses the solicited mode by defaul
• B. An LDP label request is sent to the FIB next hop LS
• C. When the egress router receives the request, it returns message with all the label-mapping information for the LSP is generated.
• D. LDP establishes a TCP session between the PE routers, thus providing label mapping for the LSP
• E. LDP uses downstream unsolicited mode by defaul
• F. An LSR advertises label mappings to peers without being asked
• G. LDP uses UDP-confirmed messages to establish sessions between PE ingress and egress router
• H. The UDP messages encode the label information for each LSP and sub- LSP link

Answer: C

NEW QUESTION 24
Which driver uses an IntServ QoS model in an MPLS TE enabled service provider network?

• A. DSCP, which requires signaling across the provider network
• B. RSVP, which enables bandwidth guarantees across a provider network
• C. RSVP, which enables per-hop behavior across a provider network
• D. DSCP, which enables bandwidth guarantees across a provider network

Answer: B

NEW QUESTION 25
Which two factors must you consider when configuring MPLS EXP? (Choose two.)

• A. MPLS EXP marking is supported in the egress direction
• B. A packet that IP ToS classifies at ingress can be reclassified by MPLS EXP at egress
• C. MPLS EXP marking is supported in the ingress direction
• D. MPLS EXP classification for bridged MPLS packets on EVCs is supported
• E. A packet that MPLS classifies at ingress can be reclassified by IP ToS at egress

Answer: CE

NEW QUESTION 26
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