Download New Updated (Spring 2015) Cisco 350-029 Actual Tests 201-210

By | April 26, 2015

Ensurepass

 

QUESTION 201

If the OSPF protocol is used to connect customer edge (CE) routers to service provider edge (PE) routers in the VPN backbone, which two options best describe the use of SHAM links?

 

A.

A sham-link is created between any two VPN sites that belong to the same OSPF area and share an OSPF backdoor link

B.

A sham-link is seen as an intra-area link between PE routers, an OSPF adjacency is created anddatabase is exchanged

C.

A sham-link is created between two directly connected PE routers so that it is preferred over the low speed backdoor door

D.

A sham-link is part of OSPF network of MPLS-VPN provider.

 

Correct Answer: AB

 

 

QUESTION 202

What is theproper MP-BGP configuration between the shown PE routers to implement MPLS VPNs on PER2?

 

clip_image001

 

A.

None of the above

B.

router bgp 1

neighbor 50.0.0.4 remote-as 1

neighbor 50.0.0.4 update-source Loopback0

no auto-summary

!

address-family ipv4

neighbor 50.0.0.4 activate

neighbor 50.0.0.4 send-community extended

exit-address-family

C.

router bgp 1

neighbor 50.0.0.4 remote-as 1

neighbor 50.0.0.4 update-source Loopback0

no auto-summary

!

address-family vpnv4

neighbor 50.0.0.4 activate

neighbor 50.0.0.4send-community extended

exit-address-family

D.

router bgp 1

neighbor 50.0.0.4 remote-as 1

neighbor 50.0.0.4 update-source Loopback0

no auto-summary

!

address-family vpnv4 unicast multicast

neighbor 50.0.0.4 activate

neighbor 50.0.0.4 send-communityextended

exit-address-family

 

Correct Answer: C

 

 

QUESTION 203

When configuring Multicast VPN (MVPN) over an MPLS core, both the Default and Data MDT is configured under which configuration mode?

 

A.

router(config-router)#

B.

router(config)#

C.

router(config-router-af)#

D.

router(config-if)#

E.

router(config-vrf)#

 

Correct Answer: E

 

 

 

 

 

 

 

 

 

 

QUESTION 204

Refer to the exhibit. The exhibit illustrates the exchange of VPN route and label information between MPLS VPN inter-AS. The exhibit also shows ASBRs exchanging VPN-IPv4 addresses. Which command is needed to change the next-hop address when ASBR2 is not configured?

 

clip_image002

 

A.

Redistribute command with the BGP routing process

B.

Redistribute command with connected

C.

Redistribute command with the IGP routing process

D.

Redistribute command with static

 

Correct Answer: B

Explanation:

Figure 11-3 illustrates the exchange of VPN route and label information between autonomous systems. The only difference is that ASBR2 is configured with the redistribute connected command, which propagates the host routes to all PEs. The redistribute connected command is necessary because ASBR2 is not the configured to change the next hop address.

 

Figure 11-3 Host Routes Propagated to All PEs Between Two Autonomous Systems

 

clip_image003

 

Reference

http://www.cisco.com/en/US/docs/net_mgmt/ip_solution_center/4.0/mpls/user/guide/11_isc.html

 

 

QUESTION 205

In Multicast VPN (MVPN) implementations, which two of the following statements are regarding the Default MDT Group? (Choose two).

< font face="Arial"> 

A.

It is used for PIM control traffic.

B.

It is optionally configured for a high bandwidth multicast source to reduce multicasttrafficreplication to uninterested PE routers.

C.

Within the VRF configuration in the PE router, multiple Default MDT groups are configured so each VRF can support multiple multicast sources.

D.

There is a reduced multicast state in the MPLS core P routers.

E.

When multicast traffic exceeds a certain configured threshold, traffic from the Data MDT is switched to the Default MDT to conserve bandwidth.

 

Correct Answer: AD

Explanation:

MVPN supports two MDT types:

Default MDT–The default MDT is a permanent channel for PIMcontrol messages and low-bandwidth streams between all PE routers in a particular multicast domain. All multicast traffic in the default MDT is replicated to every other PE router in the domain. Each PE router is logically seen as a PIM neighbor (one hop away) from every other PE router in the domain.

 

Data MDT–Data MDTs are optional. If enabled, they are dynamically created to provide optimal paths for high-bandwidth transmissions, such as full-motion video, that do not need to be sent to every PE router.This allows for on-demand forwarding of high-bandwidth traffic between PE routers, so as to avoid flooding every PE router with every high- bandwidth stream that might be created.

 

 

QUESTION 206

In relation to MPLS Multicast VPN, which three statementsabout multicast distribution (MDT) groups are true? (Choose three)

 

A.

Default MDT groups are used for PIM control traffic, low-bandwidth sources, and flooding of sparse mode traffic.

B.

MDTs are built in customer networks

C.

Data MDT groups are used for high-bandwidth sources to reduce replication to uninterested PEs.

D.

MDTs are built in provider networks

E.

The number of MDTs depends on PIM modes of MDT groups.

 

Correct Answer: CDE

Explanation:

Default-MDT

Tree created by the MVPN configuration. The Default-MDT is usedfor customer Control Plane and low rate Data Plane traffic. It connects all of the PE routers with MVRFs in a particular MD and one will exist in every MD whether there is any active source in the respective customer network.

 

 

QUESTION 207

Which statement about multicast VPN is true?

 

A.

The MDT group address should be the same for both address families in the same VRF.

B.

The MDT group address should be the same for both address families in the different VRFs.

C.

Configuration of the MDT source on a pre-VRF basis is supported only on IPv6.

D.

The MDT group address should be different for both address families in the same VRF.

 

Correct Answer: A

Explanation:

Restrictions for Multicast VPN for Multicast Routing

Configuration of the MDT source on a per-VRF basis is onlysupported on IPv4.

The MDT group address should be the same for both the address families in the same VRF. Default-MDTs must have the same group address for all VRFs that comprise a MVPN. Data-MDTs may have the same group address if PIM-SSM is used. If PIM-SM is used, they must have a different group address, as providing the same one could result in the PE router receiving unwanted traffic. This is a PIM-SM protocol issue, not an implementation issue.

 

 

QUESTION 208

Which statement about the use of Route Target Rewrite is true?

 

A.

It is mainly used in Intra-AS MPLS VPN deployments and is configured at the ASBR to avoid misconfiguration of the Route Target assignment for VPN configurations.

B.

It is mainly used in Inter-AS MPLS VPN deployments and is configured at the ASBR to avoid misconfiguration of the Route Target assignment for VPN configurations.

C.

It is mainly used in Intra-AS MPLS VPN deployments and is configured at the Router Reflector to avoid misconfiguration in Route Target assignment forVPN configurations.

D.

It is mainly used in Inter-AS MPLS VPN deployments and is configured at the Router Reflector to avoid misconfiguration of the Route Target assignment for VPN configurations.

E.

It is mainly used in Inter-AS MPLS VPN deployments and isconfigured at the PE router to avoid to misconfiguration of the Route Target assignment for VPN configurations.

 

Correct Answer: B

Explanation:

The MPLS VPN–Route Target Rewrite feature allows the replacement of route targets on incoming and outgoing Border Gateway Protocol (BGP) updates. Typically, Autonomous System Border Routers (ASBRs) perform the replacement of route targets at autonomous system boundaries. Route Reflectors (RRs) and provider edge (PE) routers can also perform route target replacement. The main advantage of the MPLS VPN – Route Target Rewrite feature is that it keeps the administration of routing policy local to the autonomous system.

 

 

QUESTION 209

Which statements about the Route Target Rewrite feature are not true? (Choose two.)

 

A.

After the route target replacement policy is applied to the target router, the BGP session neednot be refreshed manually to put the policy into operation.

B.

Route Target Rewrite allows the administration of the routing policy to stay local to the AS.

C.

Route targetreplacement is always done by the ASBR.

D.

Route target rewrites are supported for VRF export maps.

E.

Route target replacement can be done on incoming and outgoing BGP updates.

 

Correct Answer: AC

Explanation:

The MPLS VPN–Route Target Rewrite feature allows the replacement of route targets on incoming and outgoing Border Gateway Protocol (BGP) updates. Typically, Autonomous System Border Routers (ASBRs) perform the replacement of route targets at autonomous system boundaries. Route Reflectors (RRs) and provider edge (PE) routers can also perform route target replacement.

 

The main advantage of the MPLS VPN – Route Target Rewrite feature is that it keeps the administration of routing policy local to the autonomous system.

 

 

QUESTION 210

Which statement about implementingthe Cisco IPv6 provider Edge Router over MPLS is true?

 

A.

6PE feature is supported over tunnels other than RSVP-TE tunnels.

B.

Core MPLS routers are supporting IPv6 only.

C.

6PE feature is not supported over tunnels other than RSVP-TE tunnels.

D.

Core MPLS routers are supporting IPv4 only.

 

Correct Answer: C

Explanation:

Reference

http://www.cisco.com/en/US/docs/ios/ipv6/configuration/guide/ip6- over_mpls.pdf

 

The following restrictions apply when implementing the IPv6 Provider Edge Router over MPLS (6PE) feature:

 

Core MPLS routers are supporting MPLS and IPv4 only, so they cannot forward or create any IPv6 Internet Control Message Protocol (ICMP) messages.

Load balancing ability is not provided by Cisco 6PE between an MPLS path and an IPv6 path. If both are available, the MPLSpath is always preferred. Load balancing between two MPLS paths is possible. BGP multipath is not supported for Cisco 6PE routes. If two BGP peers advertise the same prefix with an equal cost, Cisco 6PE will use the last route to cross the MPLS core.

6PEfeature is not supported over tunnels other than RSVP-TE tunnels.

 

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