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Maintaining Cisco Service Provider Routing Protocols (MSPRP)

70 questions version Apr 07,12

I did not sanitize answers or compare against other dumps - DD 9-17-2012

Exam A

QUESTION 1

Refer to the exhibit. Which commands append a prefix of 3.3.3.3/32 to prefix-set “test”?

A. Prefix-set test3.3.3.3/32

B. Prefix-set testAppend 3.3.3.3/32End-set

C. Prefix-set test1.1.1.1/32,2.2.2.2/32,3.3.3.3/32End-set

Correct Answer: CSection: (none)Explanation

Explanation/Reference:http://www.cisco.com/en/US/docs/ios_xr_sw/iosxr_r3.7/routing/command/reference/rr37plcy.html#wp1153377

QUESTION 2Which statement accurately describes the BGP community filtering in Cisco IOS Software?

A. can be configured for IBGP neighbors onlyB. can be configured for both IBGP and EBGP neighborsC. can be configured for EBGP neighbors onlyD. cannot be configured for IBGP or EBGP neighbors

Correct Answer: BSection: (none)Explanation

Explanation/Reference:http://www.cisco.com/en/US/docs/ios/12_2/ip/configuration/guide/1cfbgp.html#wp1001855

QUESTION 3What effect will the command timers throttle spf 5 1000 90000 have on an OSPF router?

A. The router dynamically reduces the frequency with which it computes the SPF tree during timesof network instability.

B. The command improves router performance by limiting the amount of CPU cycles that areconsumed over time when calculating the SPF tree.

C. When recalculating the SPF tree, the LSA update timers are changed to lessen the impact onmemory and CPU usage during LSA floods.

D. The command specifies the number of LSAs that must be received in a particular time framebefore initiating a complete SPF recalculation.

Correct Answer: ASection: (none)Explanation

Explanation/Reference:http://www.cisco.com/en/US/docs/ios/12_2s/feature/guide/fs_spftrl.html

QUESTION 4While troubleshooting a loss of connectivity, you notice the log entryMar 16 08:20:16 %OSPF-5-ADJCHG: Process 1. Nbr 1.1.1.130 on Vlan30 from FULL toEXSTART. SeqNumberMismatchAfter logging into the device, you notice that the router seems to be stuck in the EXSTART stateWhen does this problem most frequently occur?

A. during startup of the OSPF processB. during high CPU load on the routerC. when the two routers report different versions of OSPF

D. when there is a mismatch between MTU settings for neighbor router interfaces

Correct Answer: DSection: (none)Explanation

Explanation/Reference:

QUESTION 5Which Cisco IOS XR Software hierarchical Route Policy Language policy configuration uses theexisting RPL policy “test”?


A. route-policy testapply test

B. route-policy newuse test

C. route-policy newapply test

D. route-policy newuse policy test



QUESTION 6

Refer to the exhibit. What is the route to destination x from the point of view of R1 if both ASBRs areadvertising Destination x as an external type route?

A. R1 sees each path as equal cost and load balances data traffic on both paths.B. R1 sees each path as equal cost and choose the path through the ASBR with the lower router-IDC. R1 sees each path as ASBR1 as the shortest pathD. R1 sees each path as ASBR2 as the shortest path



QUESTION 7How often are complete sequence number PDUs sent by an IS-IS router to its neighbor on a pointto point link?

A. Once when the link comes up, and every 10 seconds thereafterB. Once when the link comes up, and every 30 seconds thereafter.C. Once when the link comes up, and every 60 seconds thereafter.D. Once when the link comes up, and whenever there is a topology change


Explanation/Reference:http://www.velocityreviews.com/forums/t34180-is-is-csnp-multicast-interval.html

QUESTION 8An ISP is using OSPF as the IGP with a single OSPF area. The router memory usage for OSPF istoo high. Which method can lower the OSPF memory usage?

A. implement multiple OSPF areasB. implement BGP synchronization to synchronize between OSPF and BGPC. implement OSPF sham linksD. implement passive interfaces



QUESTION 9Which keyword will stop further processing of the router policy language policy on a cisco IOSrouter?

A. StopB. QuitC. Drop

D. EndE. Exit



QUESTION 10What is the default OSPF hello interval when configured on a point-to-point interface in cisco IOSsoftware?

A. 3 secondsB. 10 secondsC. 15 secondsD. 30 seconds


Explanation/Reference:http://www.davidsudjiman.info/2008/04/25/ospf-network-types-point-to-point-cisco-standard/

QUESTION 11Which command gathers information on BGP route instability in Cisco IOS XR Software?

A. show ip bgp summaryB. show bgp flap-statisticsC. show ip bgp neighborsD. show bgp ip dampening


Explanation/Reference:http://www.powerfast.net/bgp/BGP_Nd53.html

QUESTION 12Which two statements correctly describe the IBGP split-horizon rule?

A. Updates that are received on an EBGP session are forwarded to IBGP and EBGP.B. Updates that are received on an EBGP session are not sent back out to the EBGP peers that are in the

same neighboring AS.C. Updates that are received on an IBGP session are forwarded to all EGBP peersD. Updates that are received on an IBGP session can be forwarded to other IBGP peers

synchronization is turned off.

Correct Answer: ABSection: (none)Explanation

Explanation/Reference:http://www.myciscolab.com/Configuring%20Basic%20BGP%20Overview.mht

QUESTION 13Which four BGP parameters can be tuned to influence BGP convergence time? (Choose four)

A. scan timeB. stuck in active timerC. advertisement intervalD. keepalive intervalE. holdtirne intervalF. idle time

Correct Answer: ACDESection: (none)Explanation

Explanation/Reference:http://blog.ine.com/2010/11/22/understanding-bgp-convergence/

QUESTION 14Which statement accurately describes the BGP community filtering in Cisco IOS XR Software?

A. can be configured for IBGP neighbors onlyB. can be configured for both IBGP and EBGP neighborsC. can be configured for EBGP neighbors onlyD. cannot be configured for IBGP or EBGP neighbors


Explanation/Reference:http://www.cisco.com/en/US/docs/ios/12_2/ip/configuration/guide/1cfbgp.html#wp1001855

QUESTION 15If the network is experiencing high CPU usage that is caused by OSPF, which four options mightyou consider to reduce the CPU usage? (Choose four)

A. Enable OSPF incremental Shortest Path First.B. Enable OSPF Shortest Path First throttling.C. Enable multiple OSPF areas.D. Enable auto-summary.E. Enable special OSPF area types (stub, totally stubby).F. Enable the "broadcast" OSPF network type.

Correct Answer: ABCESection: (none)Explanation

Explanation/Reference:http://www.cisco.com/en/US/docs/ios/iproute_ospf/configuration/guide/iro_short_path.pdf

Benefits of OSPF Incremental SPF OSPF uses Dijkstra's SPF algorithm to compute the shortest path tree (SPT). During the computation of the

SPT, the shortest path to each node is discovered. The topology tree is used to populate the routing table withroutes to IP networks. When changes to a Type-1 or Type-2 link-state advertisement (LSA) occur in an area,the entire SPT is recomputed. In many cases, the entire SPT need not be recomputed because most of thetree remains unchanged. Incremental SPF allows the system to recompute only the affected part of the tree.Recomputing only a portion of the tree rather than the entire tree results in faster OSPF convergence andsaves CPU resources. Note that if the change to a Type-1 or Type-2 LSA occurs in the calculating router itself,then the full SPT is performed. Incremental SPF is scheduled in the same way as the full SPF. Routers enabled with incremental SPF androuters not enabled with incremental SPF can function in the same internetwork.

QUESTION 16

Refer to the exhibit. Two Cisco IOS routers that are configured with OSPF cannot establishadjacency. Examine the information that is collected from r1 and r2. Why cannot the adjacency beestablished?

A. Network-type mismatchB. Different MTUC. Subnet mismatchD. Area ID mismatch



QUESTION 17

Refer to the exhibit. The NOC has informed you about a problem on a Gigabit Ethernet linkbetween a newly installed CRS-1 that is running Cisco IOS XR Software and Cisco IOS router.These two routers cannot establish OSPF adjacency. When you connected to CRS-1, you noticedthat the Gigabit Ethernet interface MTU is 1500. You must adjust the interface MTU on the CiscoIOS router.

Which MTU should you configure on the Cisco IOS router interface to match the MTU that isconfigured on the Cisco IOS XR software?

A. 1500B. 1486C. 1468D. 1488



QUESTION 18Which list does the SNMP object "ospflfTable" provide?

A. Internet-facing routesB. IGP fast-timersC. OSPF-to-EGP mappingsD. interfaces from the viewpoint of OSPF


Explanation/Reference:http://www.freepatentsonline.com/5926463.html

If one or more of the backbone routers are running OSPF, the user is able to view the OSPF area topology. Todiscover this topology, a Router Watch means polls some MIB objects from the ospflfTable. This Router Watchmay also display virtual links between otherwise isolated OSPF areas.

QUESTION 19

Select and Place:

Correct Answer:

Section: (none)Explanation

Explanation/Reference:access-list 100 permit tcp any any eq telnet – first commandroute-map local-policy permit 10 – second commandmatch ip address 100 – third commandset ip tos 5 – fourth commandip local policy route-map local-policy – fifth command

QUESTION 20For a CRS-1 router that runs Cisco IOS XR Software Release 3.6.6 in an OSPF core. Whichprotocol or feature improves router availability and can operate independently of remote routerprotocol support?

A. BFDB. NSF IETFC. NSRD. PIME. IGMPF. MPLS LDP syncG. MPLS-TE FRR


Explanation/Reference:https://www.cisco.com/en/US/docs/routers/crs/software/crs_r4.0/routing/configuration/guide/b_rc40crs1_chapter_0100.pdf

QUESTION 21

Refer to the exhibit. What will the local-preference value for a route with a community value100:200 if the Cisco IOS XR software route policy language policy “Outer” is applied?

A. 50B. 120C. 150D. 200E. Will not change



QUESTION 22

The Cisco IOS software platform PE1 has an interface Gigabit Ethernet 0/0 that is connected tothe Cisco IOS XR platform PE4 interface Gigabit Ethernet 0/4/0/2. OSPF cannot establish anadjacency. What is possible solution to the problem?

A. Explicitly configure the cisco IOS XR software interface to be the active OSPF interface.B. Configure OSPF on each platform to ignore the interface MTU values.C. Adjust the Cisco IOS XR software hello and dead times to match the Cisco IOS software

default timersD. Change the interface configurations on both platforms to point-to-point network type.


Explanation/Reference:http://www.cisco.com/en/US/docs/ios_xr_sw/iosxr_r3.7/routing/command/reference/rr37ospf.html#wp1001043

QUESTION 23A router that runs Cisco IOS Software Release 12 2(33) SXH generates a trap with a"cbgpBackwardTransition” message. What does this message indicate?

A. BGP FSM state change has occurred and is causing transition errors.B. The BGP FSM moved from a higher-numbered state to a lower-numbered state.C. The BGP peer remote address was dropped during transitionD. A BECN notification has caused a BGP peer transition.


Explanation/Reference:http://www.cisco.com/en/US/docs/ios/12_3t/12_3t7/feature/guide/gt_bmibe.html

QUESTION 24

Select and Place:

Correct Answer:


Explanation/Reference:Explanation: route-map ospf-to-bgp deny 10 – first commandmatch tag 65001 – second commandroute-map ospf-to-bgp permit 20 – third command

QUESTION 25Which MIB supports BGP on Cisco devices?

A. CISCO-BGP4-MIBB. IETF-BGP4-MIBC. CISCO-ROUTE-MIBD. CISCO-IPBGP-MIB


Explanation/Reference:http://tools.cisco.com/Support/SNMP/do/BrowseMIB.do?local=en&step=2&mibName=CISCO-BGP4-MIB

QUESTION 26Which Cisco IOS Software feature should you enable to monitor IGP neighbor flaps?

A. IP SLAB. adjacency change loggingC. NetFlowD. route dampeningE. control plane protection


Explanation/Reference:http://www.cisco.com/en/US/docs/ios/iproute_isis/command/reference/irs_is2.pdf

QUESTION 27Which route-map statement allows further processing of these route-map sections even after themap condition has been met?

A. gotoB. continueC. jumpD. ollow


Explanation/Reference:http://www.cisco.com/en/US/docs/ios/12_3t/12_3t2/feature/guide/gt_brmcs.html

QUESTION 28

Data that is destined for 1.1.1.17 is being dropped by this router, though it is in the BGP table.Why are theses packets being dropped?

A. Synchronization is disabledB. The next-hop address is not reachable by this routerC. The AS edge router toward the destination set the next hop to itselfD. The AS edge router toward the destination set the next hop to itself



QUESTION 29What is the correct CLI hierarchy when configuring an interface for OSPF in Cisco IOS XRsoftware?

A. interface, area, routerB. area, interface, routerC. router, area, interfaceD. area, router, interface



QUESTION 30What is the most significant BGP attribute that is used for path selection in Cisco IOS XRSoftware?

A. MEDB. WeightC. local preferenceD. router ID



QUESTION 31How will the syslog report an error condition that is detected in the BGP session?

A. %BGP-3-BADMASKB. %BGP-3-NOTIFICATION:C. %BGP-3-INSUFCHUNKS:D. %BGP-3-MAXPFXEXCEED:



QUESTION 32These commands have been issued on all OSPF routers.router ospf 1ispfexitHow do these commands improve the performance of OSPF?

A. They help OSPF react faster to a local interface failure.B. They help OSPF converge faster in reaction to a network event.C. They eliminate the OSPF 30-minute LSA refresh and institute independent LSA agingD. They save processor and memory resources during network instability by delaying SPF recalculation.


Explanation/Reference:http://www.cisco.com/en/US/docs/ios/12_0s/feature/guide/ospfispf.html

QUESTION 33To improve BGP performance in your network, you would like to withdraw routes immediatelywhen the next hop of the route becomes unavailable instead of waiting for the scan interval todetect the problem. Which Cisco IOS software command will configure this failure?

A. bgp inject-mapB. bgp dampeningC. neighbor fall-overD. import path selectionE. neighbor update-source


Explanation/Reference:http://www.cisco.com/en/US/docs/ios/12_4t/ip_route/configuration/guide/brbpeer.html

QUESTION 34

Select and Place:

Correct Answer:


Explanation/Reference:Explanation: highest weightHighest local preferenceShortest AS-pathLowest origin codeMED

QUESTION 35

Refer to the exhibit. What is the expected output of route-policy “test” if the starting MED value is12?

A. set the MED to 42 and then explicit drop the routeB. set the MED to 42 and then pass the routeC. drop the route due to implicit dropD. set the MED to 42 and then implicit drop the route



QUESTION 36Which command displays all interfaces that are configured In OSPF on Cisco IOS XR Software?

A. show ospf interfaceB. show interface ospfC. show ip ospf adjD. show ospf database


Explanation/Reference:http://www.cisco.com/en/US/tech/tk365/technologies_tech_note09186a0080094056.shtml

QUESTION 37

Refer to the exhibit. A client asked you to help solve a problem This customer has two BGProuters, each connected to its upstream provider. Because of administrative restrictions, thesetwo routers do not have an IBGP session between them, and each router redistributes certainprefixes into OSPF and vice versa The customer would like to preserve the AS path attribute forprefixes that cross the OSPF domain.

Which route-map set option will let the customer preserve the attribute?

A. set tagB. set as-pathC. set as-path tagD. set extcommunity


Explanation/Reference:http://www.cisco.com/en/US/docs/ios/12_2/iproute/command/reference/1rfbgp2.html#wp1170638

QUESTION 38The service provider has allocated a block of IPv4 addresses for your network 172.16.1.0 with asubnet mask of 25 bits. You company DHCP server was configured to use this block According toyour company standards, the first available IP address is 172.16.1.130. The NOC has informedyou that devices that use this block have partial connectivity. They communicate with other butcannot reach out side networks.

What is the reason for this behavior?

A. The service provider, by mistake, allocated the RFC 1918 address.B. The IP addresses that are distributed by the DHCP server are not on the same subnet as a default gatewayC. Because everything is configured correctly, the most likely cause is a connectivity issue with a service

provider.D. Because everything is configured correctly, the most likely cause is a DHCP server issue



QUESTION 39

Refer to the exhibit. Two routers that run Cisco IOS Software cannot establish a BGP session.There is IP connectivity between them. After examining the network topology and routerconfiguration, identify the line number that prevents the establishment of BGP session.

A. 5B. 8C. 10D. 19


Explanation/Reference:http://packetlife.net/blog/2009/nov/23/understanding-bgp-ttl-security/

QUESTION 40Which protocol establishes communications over TCP port 179?

A. IS-ISB. OSPFC. EIGRPD. BGPE. IPSecF. PIM


Explanation/Reference:http://blog.ine.com/2008/02/06/understanding-bgp-port-numbers/

QUESTION 41

Refer to the exhibit. Referring to the output from the show command display, which fourstatements are correct? (Choose four)

A. 172 16 4 0/22 is an aggregated route and the summary-only option was usedB. 2.2.2.2/32 is a local prefix on the R2 routerC. 1.0.0.0 is a local prefix on the R2 routerD. 10.1.1.1 is an EBGP peerE. 2.2.2.2 is an EBGP peerF. 3.3.3.3 is an IBGP peer

Correct Answer: ABDFSection: (none)Explanation

Explanation/Reference:http://ieoc.com/forums/t/19133.aspx

QUESTION 42When using Cisco IOS show commands to examine BGP statistics you noticed that the one of theBGP peers is in the active state. What does that indicate?

A. The BGP neighborship to the BGP peer is up.B. The BGP peer is actively sending its updates.C. The BGP session is not established to the BGP peerD. The 3-way TCP handshake with the BGP peer has successfully completed


Explanation/Reference:https://learningnetwork.cisco.com/thread/35378

QUESTION 43Which two configuration modes are valid when configuring BGP on Cisco IOS XR Software?(Choose two)

A. route-reflector configuration modeB. router configuration modeC. peer-group configuration modeD. neighbor address-family configuration mode

Correct Answer: BDSection: (none)Explanation

Explanation/Reference:http://www.cisco.com/en/US/docs/ios_xr_sw/iosxr_r3.0/routing/configuration/guide/rc3bgp.html

QUESTION 44Which statement about BGP configuration in Cisco IOS XR Software is true?

A. IPv4 is the default address-family.B. VPNv4 is the default address-family.C. There is no default address-family.D. IPv4 multicast is the default address-family.


Explanation/Reference:orginal answer was A

No Default Address Family

BGP does not support the concept of a default address family. An address family must be explicitly configuredunder the BGP router configuration for the address family to be activated in BGP. Similarly, an address familymust be explicitly configured under a neighbor for the BGP session to be activated under that address family. Itis not required to have any address family configured under the BGP router configuration level for a neighbor tobe configured. However, it is a requirement to have an address family configured at the BGP routerconfiguration level for the address family to be configured under a neighbor.

http://www.cisco.com/en/US/docs/ios_xr_sw/iosxr_r3.7/routing/configuration/guide/rc37bgp.html#wp1199986

QUESTION 45

Refer to the exhibit. Two Cisco IOS routers that are configured with OSPF cannot establishadjacency. Examine the information collected from r1 and r2 routers. Why cannot adjacency beestablished?

A. network-type mismatchB. different MTUC. authentication password mismatchD. area ID mismatch



QUESTION 46

Refer to the exhibit. The OSPF database shows that there are two OSPF routes to 192.168.1.0. Whatcaused the router to install the one particular path in the routing table instead of the other?

A. The administrative distance is lower.B. The path not being used has aged out.C. E1 routes take precedence over E2 routesD. The chosen path has the smallest OSPF metricE. Intra-area routes are preferred over interarea routes



QUESTION 47

Refer to the exhibit. What will be the multi-exit-discriminator value for a route with communityvalues of 1583.241 1583:4241 if the Cisco IOS XR Software Route Policy Language policy "test"is applied?

A. 50B. 75C. 125D. Will not change



QUESTION 48

Refer to the exhibit The Cisco IOS Software platform PE1 has interface GigabitEthernet port 0/0connected to the Cisco IOS XR software platform PE4 interface GigabitEthernet 0/4/0/2. OSPFcannot establish an adjacency. What is a possible solution to the problem?

A. Explicitly configure the Cisco lOS XR Software interface to be active OSPF interfaceB. Configure OSPF on each platform to ignore the interface MTUC. Adjust the Cisco lOS XR Software hello and dead times to match Cisco IOS softwareD. Change the interface configurations on both platforms to point network type



QUESTION 49What is BGP CEF purge time on a CRS-1?

A. the time required to remove BGP routes from the FIB after clearance notificationB. the time required to remove BGP routes from the RIB after clearance notificationC. the time required to declare a BGP neighbor as downD. the time required to remove routes from the BGP routing table


Explanation/Reference:Configuring a Route Purge Delay

This task allows you to configure a route purge delay. A purge delay purges routes when the RIB or otherrelated process experiences a failure.

QUESTION 50

Refer to the exhibit. R1 and R3 are trying to peer with each other, but the session will notestablish. What can be done to allow BGP to establish the session?

A. Both routers should set the BGP next hop as self.B. Each router must explicitly activate the session before it can be established.C. On both routers, specify that the source of the session is the loopback interface.D. Increase the number of hops that are allowed when building the BGP session between the routers.

Correct Answer: CDSection: (none)Explanation



QUESTION 51What does the SNMP object "ospfNbrTable" provide?

A. a table of nonvirtual neighbor informationB. a list of neighbors for the OSPF interfaceC. area border list of neighborsD. a list of OSPF-to-NetBIOS exchanges


Explanation/Reference:http://tools.cisco.com/Support/SNMP/do/BrowseOID.do?local=en&translate=Translate&objectInput=1.3.6.1.2.1.14.10

QUESTION 52Which Cisco IOS Software command lengthens the BGP update time reduce the number ofupdates that are sent when flapping BGP inks are causing network instability?

A. timers bgpB. bgp dampeningC. neighbor timersD. bgp aggregate-timerE. neighbor advertisement-interval


Explanation/Reference:http://archive.apnic.net/meetings/10/programme/presentations/pfs-route-flap.pdf

QUESTION 53Which Cisco IOS XR Software Route Policy Language policy will set the weight to 50 for routesthat match the prefix-set “test”?

A. route-policy newif ip-address in test thenset weight 50endifend-policy

B. route-policy newmatch ip address prefix-list testset weight 50end-policy

C. route-policy new

if destination in test thenset weight 50endifend-policy

D. route-policy newmatch prefix-list testset weight 50end-policy



QUESTION 54To influence the inbound traffic flow into an AS, which BGP attribute would signal an external ASto use the preferred path unto the AS?

A. local preferenceB. MEDC. WeightD. next-hopE. origin



QUESTION 55Output from the show ip bgp command shows the state of the router IBGP sessions to be active.

Which of the following statements may be true?

A. No neighbors have been configuredB. Connections to the neighbors are up and operationalC. The router cannot find its neighbors in its IGP routing tableD. Prefixes to advertise have not been specified with the network command.


Explanation/Reference:https://learningnetwork.cisco.com/thread/35378

QUESTION 56In an effort to decrease BGP convergence time, the BGP scan timer has been lowered. What ispossible side effect of this action?

A. There are slow or no responses to the console or Telnet sessionsB. Maximum packet-per-second throughput will increase.

C. Batch updates will be held for a shorter timeD. The BGP table can become out of sync with the rest of the network


Explanation/Reference:http://www.networkers-online.com/blog/2008/12/bgp-performance-tunning-convergence-stability-scalability-and-nsf-part-2/

QUESTION 57Refer to the exhibit.

You are advertising prefix 71.44.1.180/31 with an unset community to an eBGP neighbor. Afterapplying route policy LONGPREF in the outbound direction to the eBGP. What will the communitybe for the advertised prefix?

A. will be 222:333B. will be 777:888C. will be 1:2D. will be 999:999E. will be emptyF. prefix will not be passed



QUESTION 58Which way can you distribute BGP processes to achieve better scalability on CRS-1 router s thatrun Cisco IOS XR software?

A. between the active RP and the standby RPB. between the active RP and the MSBsC. between the active RP and the DRPsD. between the active RP and the PRPs

Correct Answer: CSection: (none)

Explanation

Explanation/Reference:http://www.cisco.com/en/US/prod/collateral/routers/ps5763/product_data_sheet0900aecd80501c66.html

QUESTION 59What will be the result of the aggregate-address 192.168.0.0 255.255.0.0 BGP command?

A. The router that is doing the aggregation will advertise the 192 168 0 0/16 summary route aslong as there is at least one specific route within the range in the BGP table

B. The more specific routes will be suppressed and only the 192 168 0.0/16 summary route will beadvertised

C. The BGP table size on the router that is performing the route aggregation will be reducedD. The flap of the more specific route will not be visible to the rest of the network



QUESTION 60What type of LSA will be used by an OSPF ABR to advertise internal routes from a standard area to abackbone area?

A. type 1 router LSAs if -ill prefixes are advertised, or as type 3 summary LSAs if the prefixes aresummarized

B. type 2 network LSAsC. type 3summary LSAs, whether or not the prefixes are summarizedD. type 5 external LSAs


Explanation/Reference:http://cauew.blogspot.com/2008/03/ospf-lsa-types_18.html

QUESTION 61Without using route reflectors or confederations, an AS with 20 routers will require how manyIBGP peerings?

A. 20B. 45C. 190D. 200E. 400


Explanation/Reference:N* (N-1)/2 = 20 * 19 /2 -= 190

QUESTION 62Which three statements correctly describe the BGP route-flap-dampening feature?(Choose three)

A. Each BGP route flap is penalized by adding 1000 penalty points to the penaltyB. If a cumulative penalty exceeds the suppress limit, the route is dampened.C. The penalty is gradually decreased after the route stops flapping. When the penalty reaches

one half of the reuse limit, the route is removed from the BGP table.D. When a penalty drops below the reuse limit or when the route has been dampened for more

than the maximum suppress time, the route becomes valid again.E. The penalty reduction rate is determined by the reuse limit.

Correct Answer: ABDSection: (none)Explanation

Explanation/Reference:http://www.inetdaemon.com/tutorials/internet/ip/routing/bgp/operation/bgp_route_flap_dampening.shtml

QUESTION 63Which statement is correct regarding the BGP Fast Peering Session Deactivation feature?

A. improves the BGP convergence time by faster detection of router flapsB. lowers the CPU usage by reducing the BGP scan timeC. allows BGP to detect an adjacency change and deactivate the terminated session in between

standard CGP scanning intervalsD. allows a Cisco NSF-aware router to assist Cisco NSF-capable and Cisco NSF-aware neighbor

to continue forwarding packets during a switchover operation


Explanation/Reference:http://www.cisco.com/en/US/docs/ios/12_0s/feature/guide/cs_bsfda.html

QUESTION 64What is the difference between community sets and extended community sets in Cisco IOS XRSoftware?

A. Extended community sets match community values that are larger than 65535.B. Extended community sets match non-IP traffic.C. Extended community sets are used when all regular community sets are in use.D. Extended community sets are used to match extended community values


Explanation/Reference:http://www.cisco.com/en/US/docs/ios/12_0s/feature/guide/s_bgpcc.html

The BGP Cost Community feature introduces the cost extended community attribute. The cost community is anon-transitive extended community attribute that is passed to internal BGP (iBGP) and confederation peers butnot to external BGP (eBGP) peers. The cost community feature allows you to customize the local routepreference and influence the best path selection process by assigning cost values to specific routes.

QUESTION 65

Refer to the exhibit. Which ISIS feature needs to be configured to solve the incorrect loadbalancing of data traffic?

A. Tag the desired route by using the ‘isis’ tag interface command on R1 Gigabit Ethernetinterface.

B. Set the desired path to a higher priority by using the ip route priority high router level command.C. Adjust the interface metrics to reflect the link bandwidths by using the ‘isis metric interface

commandD. Set the link between R1 and the L1/L2 router to a level 1-only link by using the isis circuit-type

interface command



QUESTION 66Which is true when troubleshooting Cisco IOS XR Software by using the CLI?

A. Debug commands are less CPU-intensive than trace commands.B. Trace uses a butter that is shared by all processesC. Trace command logs will survive a system reboot, bill debug will notD. Both trace and debug features need to be manually enabled when troubleshooting


Explanation/Reference:http://www.cisco.com/en/US/docs/ios_xr_sw/iosxr_r3.5/general/debug/user/guide/udb35ch.html#wp1120669

System Performance Impact

Debugging output is assigned high priority in the CPU process; therefore, it can affect system performance andmight render the system unusable. Accordingly, use debug commands only to troubleshoot specific problemsor during troubleshooting sessions with Cisco technical support staff. Be sure to use debug commands onlyduring periods in which network traffic is light and fewer users are on the network. Debugging during theseperiods decreases the likelihood that the overhead of the debug command process will affect system use.

QUESTION 67Which commands configure a Cisco IOS XR router to match an AS set value that starts with 400?

A. as-set testmatch as A400_end-set

B. as -path -set testIos-regex '^400_'end-set

C. as-set testios-regex ^400_end-set

D. as-path-set testas ^400_end-set



QUESTION 68Your NMS server reports the message%SNMP-4-NOTRAPIP: SNMP trap source Gigabit Ethernet 1/0/1 has no ip addressWhat does this error message indicate?

A. The interface to be used as the source address has no address associated with itB. The SNMP server does not have a logging source interface defined.C. The SNMP-server host command has no specified trap destinationD. The interface of the trap destination is missing an address.


Explanation/Reference:http://ciscohowto.blogspot.com/2009/10/ipsnmp-4-notrapip-snmp-trap-source.html

QUESTION 69Two Cisco IOS routers with OSPF configured are unable to establish adjacency. Which debugcommand will help you to identify the root cause of the problem?

A. debug ip ospf timersB. debug ip ospf neighborsC. debug ip ospf network-type

D. debug ip ospf adjacency


Explanation/Reference:http://www.cisco.com/en/US/tech/tk365/technologies_tech_note09186a0080094050.shtml

QUESTION 70You want to filter certain prefixes that are advertised by the BGP neighbor of the neighboringautonomous system. Which command will filter prefixes that are advertised from the BGPneighbor 2.2.2.2? For filtering, use the already configured route map as123.

A. neighbor 2.2.2.2 route-map as123B. neighbor 2.2.2.2 route-map as123 outC. neighbor 2.2.2.2 route-map as123 inD. neighbor 2.2.2.2 distribute-list as123E. neighbor 2.2.2.2 distribute-list as123 outF. neighbor 2.2.2.2 distribute-list as123 in


Explanation/Reference:http://newbie-network.blogspot.com/2009/10/bgp-route-map-examples.html
