SPROUTE question of the day

PlAwAnSaI

PlAwAnSaI

Administrator
Refer to the OSPF command exhibit. Which effect does the no-summary command option have?

RP/0/RSP0/CPU0:p1(config-ospf)#area 1 stub no-summary

A. It will cause area 1 to be able to receive non-summarized inter-area routes.

B. It will cause area 1 to not receive any inter-area routes and will use a default route to reach networks in other areas.

C. It will cause area 1 to not receive any external routes and will use a default route to reach the external networks.

D. It will convert the NSSA area into a NSSA totally stubby area.

E. It will convert the stubby area into a NSSA.

F. It will disable OSPF auto-summary.
 
PlAwAnSaI

PlAwAnSaI

Administrator
When troubleshooting OSPF neighbor errors, which three verification steps should be considered?

A. Verify if neighboring OSPF interfaces are configured in the same area.

B. Verify if neighboring OSPF interfaces are configured with the same OSPF process ID.

C. Verify if neighboring OSPF interfaces are configured with the same OSPF priority.

D. Verify if neighboring OSPF interfaces are configured with the same hello and dead intervals.

E. Verify if neighboring OSPF interfaces are configured with the same area type.
 
PlAwAnSaI

PlAwAnSaI

Administrator
On Cisco IOS XR Software, which set of commands is used to enable the gi0/0/0/1 interface for OSPF in area 0?

A. interface gi0/0/0/1
ip address 10.1.1.1 255.255.255.0
!
router ospf 1
network 10.1.1.1 0.0.0.0 area 0

B. interface gi0/0/0/1
ip address 10.1.1.1 255.255.255.0
!
router ospf 1
network 10.1.1.1 255.255.255.255 area 0

C. router ospf 1
area 0
interface GigabitEthernet0/0/0/1

D. interface gi0/0/0/1
ip address 10.1.1.1 255.255.255.0
ip ospf 1 area 0

E. router ospf 1
address-family ipv4 unicast
interface GigabitEthernet0/0/0/1 area 0

F. router ospf 1
address-family ipv4 unicast
interface GigabitEthernet0/0/0/1
area 0
 
PlAwAnSaI

PlAwAnSaI

Administrator
Which three statements are true regarding the OSPF router ID?

A. The OSPF routing process chooses a router ID for itself when it starts up.

B. The router-id command is the preferred procedure to set the router ID.

C. If a loopback interface is configured, its address will always be preferred as the router ID over any other methods.

D. After the router ID is set, it does not change, even if the interface that the router is using for the router ID goes down. The router ID changes only if the router reloads or if the OSPF routing process restarts.

E. In OSPF version 3, the OSPF router ID uses a 128-bit number.
 
PlAwAnSaI

PlAwAnSaI

Administrator
Which two OSPF network scenarios require OSPF virtual link configuration?

A. to connect an OSPF non-backbone area to area 0 through another non-backbone area.

B. to connect an NSSA area to an external routing domain.

C. to connect two parts of a partitioned backbone area through a non-backbone area.

D. to enable route leaking from Level 2 into Level 1.

E. to enable route leaking from Level 1 into Level 2.

F. to enable OSPF traffic engineering.
 
PlAwAnSaI

PlAwAnSaI

Administrator
What is function of the RP/0/RSP0/CPU0:pE1(config-ospf)#distance Cisco IOS-XR command?

A. To modify the administrative distance of the OSPF routes

B. To modify the default seed metric of the OSPF external routes

C. To modify the OSPF default reference bandwidth

D. To modify the OSPF cost
 
PlAwAnSaI

PlAwAnSaI

Administrator
Which four statements are correct regarding IS-IS operations?

A. By default, Level 1 routers within an IS-IS area do not carry any routing information external to the area to which they belong. They use a default route to exit the area.

B. Summarization should be configured on the Level 2 routers, which injects the Level 2 routes into Level 1.

C. IS-IS supports "route leaking" in which selected Level 2 routes can be advertised by a Level 1/Level 2 router into Level 1.

D. The IS-IS backbone is a contiguous collection of Level 1 capable routers, each of which can be in a different area.

E. With IS-IS, an individual router is in only one area, and the border between areas is on the link that connects two routers that are in different areas.

F. Cisco IOS XR Software supports multitopology for IPv6 IS-IS unless single topology is explicitly configured in IPv6 address-family configuration mode.
 
PlAwAnSaI

PlAwAnSaI

Administrator
When configuring IPv4 and IPv6 IS-IS routing on Cisco IOS XR routers, which three statements are correct?

A. By default, a single SPF is used for both IPv4 and IPv6, so the IPv4 and IPv6 topology should be the same.

B. By default, the IS-IS router type is Level 1 and Level 2.

C. All IS-IS routers within the same IS-IS area must be configured with the same IS-IS routing process instance ID.

D. By default, metric-style narrow is used.

E. By default, the IS-IS interface circuit type is Level 1 and Level 2.

F. The area IS-IS address-family configuration command is used to specify the IS-IS area address.
 
PlAwAnSaI

PlAwAnSaI

Administrator
Refer to the PE1 router routing table output exhibit. What is causing the i su 10.1.10.0/24 [115/30] via 0.0.0.0, 00:40:34, Null0 entry on the PE1 router routing table?

RP/0/RSP0/CPU0:pE1#show route ipv4 isis


i su 10.1.10.0/24 [115/30] via 0.0.0.0, 00:40:34, Null0
i L1 10.1.10.1/32 [115/30] via 192.168.101.11, 00:42:39, GigabitEthernet0/0/0/0
i L1 10.1.10.2/32 [115/24] via 192.168.112.21, 00:44:40, GigabitEthernet0/0/0/1
i L1 10.1.10.3/32 [115/32] via 192.168.113.22, 00:38:23, GigabitEthernet0/0/0/2
i L1 10.1.10.4/32 [115/22] via 192.168.114.23, 00:14:10, GigabitEthernet0/0/0/3


A. The PE1 router is receiving the 10.1.10.0/24 summary route from the upstream L1/L2 IS-IS router.

B. The PE1 router has been configured to summarize the 10.1.10.x/32 IS-IS routes to 10.1.10.0/24.

C. The 10.1.10.0/24 has been suppressed because IS-IS auto-summary has been disabled on the PE1 router.

D. The 10.1.10.0/24 has been suppressed because of a route policy configuration on the PE1 router.

E. The 10.1.10.0/24 has been suppressed because the more specific 10.1.10.x/32 IS-IS routes have been configured to leak into the IS-IS non-backbone area.
 
PlAwAnSaI

PlAwAnSaI

Administrator
In comparing IS-IS with OSPF, a Level-1-2 IS-IS router is similar to which kind of OSPF router?

A. ASBR on a normal OSPF area

B. ASBR on NSSA

C. ABR on totally stubby OSPF area

D. ABR on stubby OSPF area

E. ABR on a normal OSPF area
 
PlAwAnSaI

PlAwAnSaI

Administrator
Refer to the Cisco IOS XE IS-IS configuration exhibit. What are two problems with the configuration that are causing the IPv4, or the IPv6, or the IPv4 and IPv6 IS-IS operations to fail?

interface GigabitEthernet0/0/0
ip address 192.168.104.40 255.255.255.0
ip router isis
ipv6 address 2001:DB8:192:168:104::40/80
ipv6 enable
ipv6 router isis
!
interface GigabitEthernet0/0/1
ip address 192.168.134.40 255.255.255.0
ip router isis
ipv6 address 2001:DB8:192:168:134::40/80
ipv6 enable
ipv6 router isis
!
router isis 1
net 49.0004.0100.0400.1001.00
summary-address 10.4.10.0 255.255.255.0
!

A. The configuration is missing the interface gi0/0/0 and interface gi0/0/1 commands under router isis 1.

B. The configuration is missing the address-family ipv4 unicast and address-family ipv6 unicast commands under router isis 1.

C. IPv6 unicast routing has not been enabled globally on the Cisco IOS XE router.

D. The gi0/0/0 and gi0/0/1 interfaces are not participating in the router isis 1 routing instance.

E. Multitopology IS-IS must be enabled to support both IPv4 and IPv6.

F. Another router isis instance must be enabled to support IPv6.
 
PlAwAnSaI

PlAwAnSaI

Administrator
The Cisco IOS XE Software summary-address router IS-IS configuration command can be used to send a summarized route into which IS-IS hierarchy?

A. Level 1 only

B. Level 2 only

C. Level-1-2 only

D. Level 1 or Level 2 or Level-1-2
 
PlAwAnSaI

PlAwAnSaI

Administrator
In which network environment is IS-IS adjacency check important?

A. in a multitopology environment where there are different instances of IS-IS running on the same router

B. in an IPv4/IPv6 environment and running single-topology IS-IS

C. when a level L1/L2 IS-IS router is neighboring with a Level 1 only or Level 2 only router

D. when IS-IS neighbors are in an NBMA environment like over Frame Relay

E. when IS-IS neighbors are in a broadcast environment like an Ethernet LAN
 
PlAwAnSaI

PlAwAnSaI

Administrator
Refer to the IS-IS configuration exhibit. This is the typical IS-IS configuration of the routers in an AS using IS-IS as the IGP. This AS is in the transition phase of integrating IPv6 into the network. During this transition phase, some of the routers within the AS might be running IPv4 only, some might be running IPv6 only, and others might be running both IPv4 and IPv6. To avoid any black holes for the IPv6 traffic, which configuration change can be made?

router isis 1
net 49.0001.0100.0100.1001.00
address-family ipv4 unicast
!
address-family ipv6 unicast
single-topology
!
interface gi0/0/0/0
address-family ipv4 unicast
!
address-family ipv6 unicast

A. Disable IS-IS adjacency checks.

B. Enable IPv6 adjacency over IPv4 IS-IS peering.

C. Enable multi-topology IS-IS.

D. Disable the IPv4 unicast address-family.

E. Enable IS-IS wide metric to support the single-topology mode.
 
PlAwAnSaI

PlAwAnSaI

Administrator
When implementing OSPF, which type of networks require DR/BDR election?

A. point-to-point networks

B. multi-access broadcast networks

C. non-broadcast multi-access networks (Hub and Spoke Frame Relay) using point-to-multipoint OSPF network type

D. All networks type
 
PlAwAnSaI

PlAwAnSaI

Administrator
The S bit in the MPLS header is used for what purpose?

A. To indicate the bottom level in the label stack

B. To indicate if LDP is sync to the IGP

C. To indicate the status of the LSP
 
PlAwAnSaI

PlAwAnSaI

Administrator
What are two purpose of the BGP scan-time command?

A. to tune the BGP process which walks the BGP table and confirms the reachability of next hops

B. to allow faster detection of downed BGP peers

C. to improve BGP convergence time

D. to tune the BGP update interval

E. to decrease the effects of unstable routes by increasing the route suppression time
 
PlAwAnSaI

PlAwAnSaI

Administrator
When using the show bgp ipv6 unicast summary command to verify the IPv6 BGP session status with the IPv6 BGP peers, you noticed the "St/PfxRcd" status for one of the IPv6 BGP peers is in the "Active" state. What does the "Active" state indicate?

A. The IPv6 BGP session has been established with the IPv6 BGP peer.

B. The router is in the process of sending BGP routing updates to the IPv6 BGP peer.

C. The router is in the process of establishing the IPv6 BGP session with the IPv6 BGP peer.

D. The router is exchanging BGP notification messages with its IPv6 BGP peer.
 
PlAwAnSaI

PlAwAnSaI

Administrator
Which three BGP configuration groupings are supported on Cisco IOS XR Software?

A. peer-group

B. af-group

C. bgp-group

D. session-group

E. neighbor-group

F. as-group
 
PlAwAnSaI

PlAwAnSaI

Administrator
Which AS path access list is used by a multihomed customer to only announce their own address space to their service providers to prevent the multihomed customer from becoming a transit AS?

A. ip as-path access-list permit local-as
ip as-path access-list deny *

B. ip as-path access-list deny.*
ip as-path access-list permit *

C. ip as-path access-list permit^$

D. ip as-path access-list permit.*

E. ip as-path access-list permit _^

F. ip as-path access-list permit _$
 
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