SPROUTE question of the day

[PlAwAnSaI]

What is recursive lookup in BGP and how does it work?

A. The router looks up the route and the next hop to reach a destination in the remote AS using the IGP. Then the router looks up the route to reach the next hop using BGP.

B. The router looks up the BGP route and the BGP next hop to reach a destination in the remote AS. Then the router looks up the route to reach the BGP next hop using the IGP.

C. The router perform three routing lookups to determine the route to reach a destination in the remote AS. The first lookup is done using EBGP, the second lookup is done using IBGP, and the third lookup is done using the IGP.

D. The router looks up the EBGP route and the EBGP next hop to reach a destination in the remote AS. Then the router looks up the route to reach the EBGP next hop using the IBGP.

E. The router looks up the IBGP route and the IBGP next hop to reach a destination in the remote AS. Then the router looks up the route to reach the IBGP next hop using the EBGP.

 

[PlAwAnSaI]

Which reserved AS number or range of numbers is used for backward compatibility between old BGP peers using 16-bit AS number and new BGP peers using 32-bit AS number?

A. AS 64001

B. AS 12345

C. AS 65512 to 65535

D. AS 23456

E. AS 65001 to 65535

 

[PlAwAnSaI]

Which BGP attribute is a set of generic tags that can be used to signal various routing policies between BGP routers?

A. communities

B. MED

C. route tags

D. AS path

E. weight

 

[PlAwAnSaI]

Which of the following is a characteristic of dual-multihomed connectivity between an enterprise network and the service provider network or networks?

A. An enterprise network announces a default route to each service provider.

B. Each service provider announces a default route on each of the links that connect to the customer with a different metric.

C. An enterprise network that is connected to two or more different service providers with two or more links per service provider and using BGP to exchange routing updates with the service providers.

D. Load balancing can be achieved using the maximum-paths command.

 

[PlAwAnSaI]

What are two ways to advertise networks into BGP?

A. using the network router BGP command

B. using route redistribution into BGP

C. using the neighbor router BGP command

D. enabling an interface to run BGP using the interface router BGP command

E. using a route policy in Cisco IOS XR Software or using a route map in Cisco IOS Software or Cisco IOS XE Software

 

[PlAwAnSaI]

When configuring BGP on Cisco IOS XR Software, which address-family is enabled by default?

A. IPv4 unicast and IPv6 unicast

B. IPv4 unicast and IPv6 unicast and VPNv4

C. No address-family is enabled by default

D. IPv6 unicast

E. VPNv4

F. IPv4 unicast

 

[PlAwAnSaI]

What are two characteristics of the multihomed customers to service providers connection option?

A. Multihomed customer must use a provider-assigned address space.

B. The traffic load can be shared for different destination networks between service providers.

C. Multihomed customers must receive a full routing table from the service providers.

D. The routing methodology must be capable of reacting to dynamic changes. BGP is used to achieve this flexibility.

E. Multihomed customers must use a private AS number.

 

[PlAwAnSaI]

Referring to the partial Cisco IOS-XR BGP configuration exhibit.

router bgp 65111
!
neighbor 10.1.1.1
remote-as 65111
update-source Loopback0
address-family ipv4 unicast
!
!
neighbor 2001:db8:10:1:1::1
remote-as 65111
update-source Loopback0
address-family ipv6 unicast
!

When trying to commit this configuration, the following error is displayed:
% Failed to commit one or more configuration items during a pseudo-atomic operation. All changes made have been reverted. Please issue 'show configuration failed' from this session to view the errors.
What is wrong with the configuration?

A. The update-source loopback 0 commands must be configured under the respective neighbor address-family.

B. The configuration is missing the required network command.

C. IPv6 unicast routing has not been enabled globally using the ipv6 unicast-routing command.

D. The configuration is missing the address-family ipv4 unicast and address-family ipv6 unicast commands under router bgp 65111.

 

[PlAwAnSaI]

Which two of the following are true regarding the BGP Prefix-Based outbound route filtering feature?

A. IP multicast routes are not supported.

B. Outbound route filtering is configured only on a per-address family basis.

C. The outbound route filter can be defined in a Prefix list, Distribute list or Access lists.

D. Outbound route filtering can be configured for either iBGP or eBGP sessions.

E. Outbound route filtering is more effective when a distance vector IGP is used.

 

[PlAwAnSaI]

Refer to the Cisco IOS-XR route policy exhibit.

route-policy setcomm
if community matches-any (11:11, 44:44) then
set community (55:55) additive
elseif community matches-any (22:22) then
set community (77:77) additive
endif

Which statement correctly describes this route policy?

A. If a route has both the 11:11 and 22:22 communities (or 44:44 and 22:22), the router adds the 55:55 community only.

B. The pass action is required after each of the set community statements to make this route policy functional.

C. If a route only has the 22:22 community, then no community will be added by the router.

D. If a route only has the 11:11 or 44:44 community, then no community will be added by the router.

E. If a route contains the 11:11 or 44:44 community, the router adds the 55:55 community and continues. Additionally, if the same route also contains the 22:22 community, the router also adds another 77:77 community to the same route.

 

[PlAwAnSaI]

Refer to the BGP and route map configurations exhibit.

router bgp 65001
neighbor 10.1.1.2 remote-as 65023
neighbor 10.1.1.2 route-map setas out
!
route-map setas permit 10
match ip address test1
set as-path prepend 65111 65112
!
route-map setas permit 20
match ip address test2
set as-path prepend 65202 65203 65204
!
!end of the route-map configuration

When the "setas" route map is applied to the 10.1.1.2 neighbor, the 10.1.1.2 neighbor is not able to receive all the required BGP routes from this router. What could be the problem?

A. The test1 or test2 prefix-list is misconfigured.

B. The BGP session was cleared using the clear ip bgp command after the route map was applied.

C. The route map is missing the route-map setas permit 30 statement.

D. There is no pass action configured within the route map.

 

[PlAwAnSaI]

In Cisco IOS and Cisco IOS XE Software images, when redistributing routes from other routing protocols into OSPF, what is a common reason why some of the routes might not be redistributed into OSPF?

A. The OSPF seed metric is not defined.

B. The subnets option in the redistribute command is missing.

C. The OSPF level (Level 1, Level 2, or Level-1-2) to which the routes will be redistributed into is not defined.

D. The OSPF external metric type (E1 or E2) is not defined.

 

[PlAwAnSaI]

Refer to the exhibit.

route-policy OSPFintoISIS
if tag eq xxx then
drop
else
set tag yyy
endif
end-policy

Based on the Cisco IOS XR route policy configuration, when redistributing OSPF routes into IS-IS, to which of the following does the "tag" value correspond?

A. The tag value represents the OSPF metric.

B. The tag value represents the administrative distance

C. The tag value identifies a route or set of routes.

D. The tag value is used to match whether the IS-IS route is an external or internal IS-IS route.

E. The tag value represents the IS-IS metric.

 

[PlAwAnSaI]

When configuring Cisco IOS route maps, which command allows the route map processing to jump to another statement instead of exiting?

A. goto

B. jump

C. next

D. set

E. continue

 

[PlAwAnSaI]

Refer to the Cisco IOS route map configuration exhibit.

route-map test permit 10
match ip address prefix-list PL1 PL2
match as-path APACL1
set local-preference 200
set metric 1000
!
route-map test permit 100

Which two statements are correct?

A. All routes that are not matched by the sequence 10 route map statement will be dropped.

B. The match prefix-list condition is a logical OR: match prefix list PL1 OR PL2.

C. All match conditions are logical OR: match prefix list PL1 OR PL2 OR match the APACL1 AS path access list.

D. The local preference AND the metric will be set to 1000 IF the route matches the PL1 OR PL2 prefix list AND the route must also match the APACL1 AS path access list.

E. The three match conditions are logical AND: match prefix list PL1 AND PL2 AND match the APACL1 AS path access list.

 

[PlAwAnSaI]

Refer to the route policies exhibit.

route-policy one
end-policy
!
route-policy two
pass
end-policy
!
route-policy three
drop
end-policy
!
route-policy four
set weight 100
end-policy
!
route-policy five
pass
drop
pass
end-policy

Which five route policies will cause the routes to be dropped or passed?

A. route-policy four will cause the routes to be dropped.

B. route-policy five will cause the routes to be dropped.

C. route-policy five will cause the routes to be passed.

D. route-policy three will cause the routes to be dropped.

E. route-policy one will cause the routes to be dropped.

F. route-policy one will cause the routes to be passed.

G. route-policy two will cause the routes to be dropped.

H. route-policy two will cause the routes to be passed.

I. route-policy four will cause the routes to be passed.

J. route-policy three will cause the routes to be passed.

 

[PlAwAnSaI]

When using the Cisco IOS XR route policy language to define a logical if-then-else condition, which logical operator has the highest precedence?

A. IN

B. AND

C. OR

D. IS

E. NOT

 

[PlAwAnSaI]

When configuring Cisco IOS XR route policy nesting, which command is used within a route policy to call another route policy?

A. call

B. apply

C. continue

D. goto

E. jump

 

[PlAwAnSaI]

Refer to the Cisco IOS XR route policy exhibit.

route-policy SetLP
if med eq 10 then
set local-preference 200
endif
if local-preference eq 100 then
set weight 100
endif
if local-preference eq 200 then
set weight 200
endif
end-policy

If the original incoming routing update has a MED of 10 and a local preference of 100, how will the routing update be modified?

A. The local preference will be set to 100, the MED will be set to 10, and the weight will be set to 200.

B. The local preference will be set to 200, the MED will be set to 10, and the weight will be set to 100.

C. The local preference will be set to 100, the MED will be set to 10, and the weight will be set to 100.

D. The local preference will be set to 200, the MED will be set to 10, and the weight will be set to 200.

 

[PlAwAnSaI]

Refer to the topology diagram in the exhibit. Which IS-IS feature could be implemented so that the return path for the packets from router Y in area 49.00AA to router X in area 49.00BB will use the more optimal path?

A. Change the area 49.00AA type from a stub area to a regular area.

B. Enable route leaking to pass Level 2 information into the Level 1 routers.

C. Change the IS-IS administrative distance on router Y in area 49.00AA.

D. Change the IS-IS metric type from narrow to wide on all IS-IS routers.