XR Specialist Flashcards by Steven Bronstein

How much power is the system currently using?

A. 663 W
B. 1150 W
C. 1850 W
D. 6000 W

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How many additional line cards of the same type that are currently in the system can you safely install and remain redundant in the worse power usage if there is a power supply failure?

A. 1

B. 2
C. 3
D. 4
E. 5

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What is the maximum long-term normal operating temperature of the Cisco CRS-1, ASR 9000 Series Routers, and XR 12000 Series Routers?

A. 40C (104F) B. 50C (122F) C. 55C (131F) D. 65C (149F)

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The Cisco CRS 16-Slot Line Card Chassis Site Planning Guide suggests having 48 inches of clearance behind the chassis. What would definitely happen to the system if there were only 28 inches of clearance behind the Cisco CRS 16-Slot Line Card Chassis?

A. The system would overheat due to inadequate airflow.
B. The fabric card could not be exchanged if one failed.
C. The modular services card (MSC) could not be exchanged if one failed.
D. The fan tray could not be exchanged if one failed.

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How many planes are there in the Cisco CRS-3 switch fabric?

D. 8

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What is the cell size of the cells that traverse the switch fabric on the Cisco CRS-3?

B. 136 bytes

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Where are client interfaces terminated on the Cisco CRS-3?

B. the physical layer interface module(s)

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In order to determine the hardware and firmware revision of a linecard, what is the correct command that should be invoked?

A. RP/0/RP0/CPU0:CRS-MC#show version
B. RP/0/RP0/CPU0:CRS-MC#show platform
C. RP/0/RP0/CPU0:CRS-MC(admin)#show platform
D. RP/0/RP0/CPU0:CRS-MC#show diagnostic summary E. RP/0/RP0/CPU0:CRS-MC(admin)#show diag details

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In which mode can you check the power usage of a chassis?

A. in EXEC mode B. in admin mode
C. in both EXEC and admin mode
D. in ROMMON mode
E. in environmental mode

B. in admin mode

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QUESTION NO: 10

Refer to the exhibit.

If you have ROMMONs and FPDs with the Upg/Dng field marked “Yes” and you ran the upgrade hw-module fpd all location all command, what did you upgrade?

A. upgraded only the FPD for the cards that the Upg/Dng field marked “Yes”
B. upgraded all of the FPDs on all cards with an FPD regardless of the Upg/Dng field markings
C. upgraded only the FPD and ROMMON for the cards that the Upg/Dng field marked “Yes”
D. upgraded all of the FPDs and ROMMONs on all cards with an FPD or ROMMON regardless of the Upg/Dng field markings

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Which two of the following are correct commands to activate the PIE file ? (Choose two.)

A. install add tftp://172.20.165.36/hfr-mgbl-p.pie-4.0.1 activate
B. install activate tftp://172.20.165.36/hfr-mgbl-p.pie-4.0.1
C. install add disk0:hfr-mgbl-p-4.0.1 activate
D. install activate disk0:hfr-mgbl-p.pie-4.0.1

A,D

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Which command will correctly deactivate asr9k-mpls-p-4.1.0?

A. RP/0/RSP0/CPU0:P1 (admin)#install remove disk0:asr9k-mpls-p-4.1.0
B. RP/0/RSP0/CPU0:P1 (config)#install deactivate smu location disk0:
C. RP/0/RSP0/CPU0:P1 (admin-config)#deactivate disk0:asr9k-mpls-p-4.1.0
D. RP/0/RSP0/CPU0:P1 (admin)#install deactivate disk0:asr9k-mpls-p-4.1.0 E. RP/0/RSP0/CPU0:P1 #asr9k-mpls-p-4.1.0 disk0:deactivate sync

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Which answer best summarizes the difference between p and px images, hfr-mini-p.vm-4.1.1 and hfr-mini-px.vm-4.1.1, respectively?

A. P images can only support legacy hardware, while px images can only support new CRS-3 hardware.
B. P images can use an SMU to operate as x86 images.

C. P images can only support Power PC hardware, while px images can support both Power PC and Intel hardware in the same chassis.
D. P and px images can both be installed on the same ROMMON version.

E. P and px images are roughly the same because they are built to operate on the same system.

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Which Cisco IOS XR command sequence will load a specific configuration?

A. (config)#load disk0:name.cfg

B. #copy disk0:name.cfg running-confirguration
C. #copy tftp://255.255.255.255/name.cfg
D. #load commit changes E. (config)#load commit

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Which of the following functions can be configured in the Administration Config mode? (Choose two)

A. BGP routing
B. MPLS Traffic Engineering 
C. SDR hostname
D. Secure Shell login 
E. nonowner SDR

C,E

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Which two of the following statements regarding task-based authorization are true? (Choose two.)

A. The user group concept in Cisco IOS XR Software relates to a group of users with common characteristics.
B. All of the user groups are precreated by default.

C. In addition to the predefined task groups, Cisco IOS XR Software provides the ability to custom create task groups consisting of individual tasks.
D. User groups and task groups cannot inherit from other user groups and task groups

A, C

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A network administrator needs to configure a default IPv4 route for a Cisco CRS-1 router. Which Cisco IOS XR command will accomplish this task?

A. RP/0/RSP0/CPU0:R15(config-static)#ip route 0.0.0.0 0.0.0.0 10.52.204.161
B. RP/0/RSP0/CPU0:R15(config-static-afi)#0.0.0.0/0 10.52.204.161
C. RP/0/RSP0/CPU0:R15(config)#router static 0.0.0.0/32 10.52.204.161
D. RP/0/RSP0/CPU0:R15#ip default-network 0.0.0.0 10.52.204.161 255.255.255.255 E. it is not possible to configure static routes in Cisco IOS XR Software

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What is the main function of LPTS?

A. filter routing updates
B. maintain the Internal Forwarding Information Base (IFIB)
C. classify transit packets
D. guarantee reliable transport service for network management requests

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Where is the LPTS policer applied?

A. egress line-card egress queue B. egress line-card CPU
C. route processor CPU D. distributed RP CPU E. ingress line card

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Referring to the diagram and configuration on Routers XR-1 and XR-2, which three statements are correct? (Choose three.)

A. Router XR-1 can never be a designated router or designated intermediate system.
B. The transmission of IS-IS packets will be suppressed on interface GigabitEthernet0/0/0/2 on Router XR-1.
C. The received IS-IS packets from Router XR-2 will be suppressed from being processed.
D. Router XR-1 and Router XR-2 will form a neighbor adjacency, and Router XR-2 will become the designated router or designated intermediate system.
E. Router XR-1 will use the incremental shortest path first algorithm when there are minimal topology changes.
F. Router XR-1 can form a neighbor adjacency over interface GigabitEthernet0/0/0/2 but will not advertise 10.1.1.0/24 in its link-state packets (LSPs).

D, E, F

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What is the correct command to copy the contents of the harddisk:/showtech folder to an FTP server?

A. copy harddisk:/showtech location 0/RSP0/CPU0 ftp: B. copy harddisk:/showtech ftp:
C. copy /recurse harddisk:/showtech location 0/RSP0/CPU0 ftp: D. copy /recurse harddisk:/showtech ftp:
E. copy ftp: harddisk:/showtech

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What are the two commands to show all log entries except BGP or configuration-related ones? (Choose two.)

B, D

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Which Cisco IOS XR only command will show the status of IPv4 interfaces that have been configured under the OSPF process?

A. show ospf interface
B. show ipv4 ospf interface 
C. show ip ospf interface 
D. show ospf interface all E. show ospfv3 interface
F. show ospf address-family

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Which command should be used to view only the running configuration of OSPF in Cisco IOS XR Software?

A. show router ospf
B. show run router ospf
C. show configuration ospf
D. show ospf configuration | running-config E. show ospf process

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Which is-is router interface configuration command will configure the authentication password for IS-IS Hello (IIH) messages without actually sending the password with the IIH over the network? A. hello-password text clear secretkey B. hello-password hmac-md5 clear secretkey C. hello-password text encrypted secretkey D. hello-password hmac-md5 encrypted secretkey

What is the correct procedure to associate a VRF to a static route? A. configure the VRF under the interface B. specify the VRF under "router static" in configuration mode C. define the VRF in the global configuration D. specify the VRF in the route global configuration command

What is the correct Cisco IOS XR command to configure an autonomous system number 1000 for BGP and to support IPv4, IPv6, and unicast routing? ``` A. router bgp 1000 address-family ipv4 unicast address-family ipv6 unicast ! B. router bgp 1000 neighbor 1.1.1.1 remote-as 2000 address-family ipv4 unicast ! address-family ipv6 unicast ! C. router bgp 1000 address-family vpnv4 unicast ! address-family vpnv6 unicast ! D. router bgp 1000 neighbor 1.1.1.1 remote-as 2000 address-family vpnv4 unicast ! address-family vpnv6 unicast ! ! ```

Which Cisco IOS XR show command is used to display the IPv4 BGP table? ``` A. show bgp B. show bgp summary C. show bgp neighbors D. show route bgp E. show bgp vpnv4 F. show bgp table ```

Which of the following configurations adds a community to routes that are matched on AS criteria? ``` A. route-policy policy1 if as-path in set1 then set community (356:1000) endif end-policy ``` ``` B. route-policy policy1 if community in set1 then set community (356:1000) additive endif end-policy ``` ``` C. route-policy policy1 if as-path in set1 then set community (356:1000) additive endif end-policy D. route-policy policy1 if as-path neighbor-is set1 then set community (356:1000) additive endif end-policy ```

Which three commands can verify that the route-policy shown below and applied inbound on the BGP neighbor is working as expected for prefix 2.0.0.0/8? ``` as-pathset set 1 neighbor-is '23 637 42 1 3 4 end-set ! route-policy policy 1 if as-path in set 1 then set community (356:1000) additive endif end-policy ``` (Choose three.) A. show bgp 2.0.0.0 | include 356:1000 B. show bgp | include 2.0.0.0 C. show bgp community 356:1000 | include 2.0.0.0 D. show bgp 2.0.0.0

A, C, D

How would you configure IS-IS process TEST to support MPLS Label Distribution Protocol, Graceful Restart be configured on TenGigE 0/0/0/1? ``` A. Interface Ten0/0/0/1 mpls ip Graceful-restart B. router ospf interface Ten 0/0/0/1 address-family ipv4 uni mpls ip graceful-restart C. mpls ldp address-family ipv4 unicast mpls ip graceful-restart D. mpls ldp graceful restart interface Ten 0/0/0/1 ```

How would you configure IS-IS process TEST to support MPLS Traffic Engineering extensions on level 1 and 2 that are intending to run a tunnel across TenGigE 0/0/0/0? A. mpls ldp traffic-eng level-1-2 mpls traffic-eng router-id 1.1.1.1 router isis TEST interface Ten 0/0/0/0 address-family ipv4 unicast B. router isis TEST net 49.0001.0001.0001.0001.00 address-family ipv4 unicast metric-style wide mpls traffic-eng router-id 1.1.1.1 mpls traffic-eng level-1-2 interface Ten 0/0/0/0 address-family ipv4 unicast C. router isis TEST net 49.0001.0001.0001.0001.00 address-family ipv4 uni metric-style wide interface Ten 0/0/0/0 address-family ipv4 unicast mpls traffic-eng router-id 1.1.1.1 mpls traffic-eng level-1-2 D. mpls ldp router isis TEST interface Ten 0/0/0/0 address-family ipv4 unicast mpls traffic-eng level-1-2 mpls traffic-eng router-id 1.1.1.1

When running MPLS Traffic Engineering with Cisco IOS XR Software, which three criteria can be seen when the show mpls traffic-eng tunnels command is executed on a midpoint router? (Choose three.) ``` A. tunnel role B. TE metric C. tunnel ID D. physical bandwidth E. incoming and outgoing label ```

A,C,E

What are the two prerequisites for enabling multicast-only fast reroute (MoFRR) in a network? (Choose two.) A. There must be an Equal-Cost Multipath (ECMP) topology. B. IP multicast traffic must use the group address 232.0.0.0/8. C. PIM-SSM needs to be configured. D. There must be a valid reverse path back to the multicast source.

A, D

Which CLI command can be used to display interfaces statistics? A. RP/0/RSP1/CPU0:ASR9006#monitor interface B. RP/0/RSP1/CPU0:ASR9006#show interfaces summary C. RP/0/RSP1/CPU0:ASR9006#show interfaces statistics | inc errors D. RP/0/RSP1/CPU0:ASR9006#show interfaces accounting | inc errors E. RP/0/RSP1/CPU0:ASR9006(admin)#show flow platform producer statistics location 0/0/CPU0 F. RP/0/RSP1/CPU0:ASR9006(admin)##show interfaces statistics

Which three types of packet drop statistics can be determined by using the following Cisco IOS XR CLI show command? (Choose three.) RP/0/RSP1/CPU0:ASR9006-A#show cef ipv4 drops location all ``` A. no route drops B. no adjacency drops C. RPF drops D. ACL drops E. asymmetric routing drops F. Cisco Express Forwarding exception drops ```

A, B, C

:router# show access-list ipv4 Ethernet in ipv4 access-list Ethernet_In 1 deny udp any eq netbios-ns any 2 deny udp any host 255.255.255.255 eq tftp 3 permit any which set of commands below will allow you to insert a new line just before the permit any statement? A. :router#configure :router(config)#ipv4 access-list Ethernet_In :router(config-ipv4-acl)# 2.5 deny udp any eq tftp any B. :router#configure :router(config)#ipv4 access-list Ethernet_In :router(config-ipv4-acl)# insert after 2 deny udp any eq tftp any C. :router #resequence access-list ipv4 Ethernet_In :router#configure :router(config)#ipv4 access-list Ethernet_In :router(config-ipv4-acl)#25 deny udp any eq tftp any D. :router#configure :router(config)#ipv4 access-list Ethernet_In :router(config-ipv4-acl)#move 3 to 4 :router(config-ipv4-acl)#3 deny udp any eq tftp any

Which two commands will allow you to check if interface Bundle-Ether1 has ACL Ethernet_In applied to its ingress? (Choose two.) A. show access-list ipv4 Ethernet_In B. show interface Bundle-Ether1 access-list C. show running-config interface Bundle-Ether 1 D. show running-config ipv4 access-list Ethernet_In E. show ipv4 interface Bundle-Ether 1

C, E

Which Cisco IOS XR command would you use to view the actual traffic statistics of packets that are exiting the router in the different configured QoS queues on TenGigE 0/0/0/0 in Cisco IOS XR Software? A. show policy-map interface TenGigE 0/0/0/0 B. show qos interface TenGigE 0/0/0/0 output C. show interface TenGigE 0/0/0/0 qos D. show interface TenGigE 0/0/0/0 policy-map output E. monitor interface TenGigE 0/0/0/0

What are the three potential use cases of NetFlow in an actual network deployment? (Choose three.) A. identifying the traffic source and destination for optimizing peering and transit links B. providing the network telemetry for identifying and mitigating DDoS attacks C. providing traffic traces that are comparable to what is provided by a packet sniffer and RMON D. providing a means for traffic accounting and billing for customers E. providing deep application inspections and controls

A, B, D

QUESTION NO: 41 Which three configuration steps are mandatory in order to enable NetFlow sampling on Cisco IOS XR Software? (Choose three.) A. flow monitor-map B. sampler-map C. flow exporter-map D. interface netflow configuration E. importer-map

A, B, D

Which command configures IPv4 uRPF strict mode on an interface? A. ipv4 verify unicast source reachable-via any B. ipv4 verify unicast source reachable-via tx C. ipv4 verify unicast source reachable-via rx D. ipv4 verify unicast destination reachable-via rx E. ipv4 verify multicast source reachable-via tx

Which command in Cisco IOS XR Software is the recommended way to configure an IPv4 address on an interface? A. ip address 10.0.0.1/8 B. ip address 10.0.0.1 255.0.0.0 C. ipv4 address 10.0.0.1/8 D. ip addr add 10.0.0.1/8 dev Gig 0/0/0/0

``` Conf Interface TenGifE0/0/3/0 ipv6 address 10:10::1/64 ipv6 address 20:20::1/64 No shut Commit ``` What is the expected behavior for the following Cisco IOS XR config? A. The interface will have IPv6 address 10:10::1/64 only. B. The interface will have IPv6 address 20:20::1/64 only. C. The interface will have IPv6 address 10:10::1/64 and IPv6 address 20:20::1/64. D. The commit will fail.

In Cisco IOS XR platforms, IP multicast packets are replicated on which two components? (Choose two.) A. switch fabric B. ingress line card C. egress line card D. multicast forwarding ASIC

A, C

Which Cisco IOS XR command is the most useful for checking if traffic is being sent for a specific multicast group? A. show ip mroute traffic 226.1.1.1 B. show mrib route 226.1.1.1 C. show multicast stats D. show mfib route 226.1.1.1

Which configuration is required in order for chassis management (for example, power and fan statistics) to be polled using SNMP? A. snmp-server community RO B. snmp-server community SDROwner C. snmp-server community SystemOwner D. snmp-server community RW

What is the effect of configuring "logging disable"? A. It will stop the router from sending logs to a syslog server. B. It will stop the router from displaying logs on a vty (Telnet or SSH) session. C. It will stop the router from displaying logs on a console session. D. It will stop the router from archiving logs to a local disk

Which configuration command will set EXEC shell timeout on the console to 300 seconds? A. line console exec-timeout 5 0 B. line console session-timeout 300 C. line console session-timeout 300 output D. line console timeout login response 300

Which four list the mandatory steps in order to implement SSH v1 access on Cisco IOS XR Software? (Choose four.) ``` A. install and activate services PIE B. install and activate security PIE C. reload system after installing required PIE D. generate SSH cryptography key E. configure hostname and domain name F. configure ssh-server in owner SDR G. configure AAA services on the router H. configure TACACS server on the router ```

B, D, E, F

In which two ways do you set the maximum number of Telnet sessions to 10? (Choose two.) A. telnet vrf default ipv4 server max-servers 10 B. telnet ipv4 server max-servers 10 C. telnet max-servers 10 D. telnet ipv4 max-servers 10

A, B

Which optional PIE do you need to install if you want to use XML for the management and configuration of Cisco IOS XR Software? ``` A. asr9k-mgbl-p.pie-4.2.0 B. asr9k-doc-p.pie-4.2.0 C. asr9k-services-p.pie-4.2.0 D. asr9k-xml-p.pie-4.2.0 E. do not need a PIE because it is part of the minimum boot image (MBI) ```

Refer to the exhibit. ``` username user1 group root-system secret ;ab ! aaa authentication login vty-authen local line default secret cisco users group operator login authentication vty-authen ! Examine the configuration for AAA and the vty line. ``` If the user attempts to connect to the router via an SSH session to the vty, which one is true? A. The user will be prompted for a username and password and can successfully log in using "user1" and "lab." The user will be a member of the user group operator. B. The user will be prompted only for a password and can successfully log in using the password "cisco." The user will be a member of the user group operator. C. The user will be prompted only for a password and can successfully log in using the password "cisco." The user will not be assigned any tasks. D. The user will be prompted for a username and password and can successfully log in using "user1" and "lab." The user will be a member of the user group root-system. E. The user will not be able to authenticate with this configuration.

Which command will show the IP address of a Cisco Discovery Protocol neighbor? A. show cdp B. show cdp entry C. show cdp interface D. show cdp neighbors

``` RP/0/RSP0/CPU0:RTR1# show running-config control-plane Wed Feb 1 20:53:23.836 UTC control-plane management-plane inband interface all allow SSH ! ! Based on the configuration, which two statements are true for RTR1? (Choose two.) ``` A. SNMP traps that are going out on TenGigE 0/0/0/0 will be dropped. B. SNMP polling that is coming through interface TenGigE 0/0/0/0 will be dropped. C. The Telnet connection that is coming through MgmtEth0/RSP0/CPU0/0 will be dropped. D. TACACS traffic that is originating from RTR1 and going through TenGigE 0/0/0/0 will be dropped. E. The SSH connection that is coming through TenGigE 0/0/0/0 from host 5.5.5.5 will be accepted.

B, E

QUESTION NO: 56 Which statement is false? A. The NTP stratum describes how many hops away that a system is from an authoritative time source. B. A Cisco IOS XR device can be directly connected to an atomic clock and provide a stratum 1 service. C. A Cisco IOS XR device can be configured as a stratum 1 master clock source. D. UTC is a global time scale that is distributed by atomic clocks over the Internet, over specialist long-wave radio transmissions, or with the Global Positioning System (GPS) network.

Which component is shared between different SDRs? ``` A. route processor (RP) B. line card C. modular service card (MSC) D. switch fabric card (SFC) E. distributed route processor (DRP) ```

On a Cisco CRS, which statement is correct about what happens to the MSC if the associated PLIM is absent? A. The MSC boots up, but all egress packets from the switch fabric to this MSC will be dropped. B. The other PLIM in a different slot can utilize this MSC. C. The state of the MSC from the output of the command show platform would show as IOS XR RUN. D. The MSC does not boot up.

How many stages are there in the Cisco CRS-1 switch fabric? ``` A. 1 B. 3 C. 4 D. 8 E. None, as the Cisco CRS-1 does not use a switch fabric ```

What is the size of the packets that traverse the Cisco CRS-3 switch fabric? A. variable packets that are dependent on packets being sent through the client interfaces B. 64 bytes C. 1500 bytes D. not applicable, as the Cisco CRS-3 uses a fixed cell in the switch fabric

How many stages of switching are there on a Cisco ASR 9000 Series Router switch fabric? A. one B. three C. four D. eight

In order to retrieve information from the temperature sensors on the system, what are the two commands that should be invoked? (Choose two.) A. RP/0/RP0/CPU0:CRS-MC#show version B. RP/0/RP0/CPU0:CRS-MC#show platform C. RP/0/RP0/CPU0:CRS-MC(admin)#show environment all D. RP/0/RP0/CPU0:CRS-MC(admin)#show environment temperature E. RP/0/RP0/CPU0:CRS-MC(admin)#show platform

C, D

If the fpd.pie is installed but not activated and FPD Auto-Upgrade is enabled, which statement is true? ``` A. The show hw-module fpd location all command will not work. B. The upgrade hw-module fpd all location all command will not work. C. The upgrade hw-module fpd all force location all command will force the fpd.pie to activate and upgrade all of the FPDs in the system. D. With FPD Auto-Upgrade enabled, the system will automatically upgrade all of the FPDs and ROMMONs that are flagged for upgrade upon reload. ```

Which user privilege level is needed to create a nonowner SDR? ``` A. root-system B. Cisco-support C. root-lr D. netadmin E. sysadmin ```

What is the effect of a mandatory process, if it keeps restarting? A. router instability B. nothing, as Cisco IOS XR Software protects process space C. the router will reload D. it can cause routing adjacencies to flap E. displays a high CPU load error message

What is the correct Cisco IOS XR CLI command to assign a cost of 20 to interface TenGigE 0/1/0/1 for Area 0? A. config mode, router ospf 1, area 0, interface tengige 0/1/0/1, cost 20 B. config mode, router ospf 1, area 0, interface tengige 0/1/0/1, auto-cost 20 C. config mode, interface tengige 0/1/0/1, ip ospf cost 20 D. config mode, router ospf 1, interface tengige 0/1/0/1, ip ospf cost 20

In Cisco IOS XR Software, Label Distribution Protocol (LDP) would be configured on POS 0/0/0/0 using which commands? ``` A. interface pos 0/0/0/0 mpls ip B. mpls ldp interface pos 0/0/0/0 C. router ospf interface pos 0/0/0/0 address family ipv4 uni mpls ip D. mpls ldp address-family ipv4 unicast interface pos 0/0/0/0 mpls ip ```

What are the two minimum tasks and configurations that are required for the forwarding of multicast traffic using Source-Specific Multicast? (Choose two.) A. installing services PIE on the router B. installing multicast PIE on the router C. configuring multicast-routing on interfaces D. configuring PIM on interfaces

B, C

Which of the following QoS criteria cannot be configured on a policy map that is applied in the ingress direction on a Cisco CRS-1 interface in Cisco IOS XR Software? ``` A. bandwidth B. shape average C. random-detect D. police E. set qos-group F. priority ```

QUESTION NO: 70 Which uRPF mode specifies that the source address of the packet is checked against the FIB to make sure that it is being received on the interface that is selected as the best path to this source address? A. strict mode B. loose mode C. asymmetric mode D. symmetric mode

XR Specialist Flashcards

(70 cards)