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NEW QUESTION 1
What is the primary difference between 6PE and 6VPE?
- A. 6VPE does not require an MPLS core.
- B. 6VPE requires an IPv6-aware core.
- C. 6VPE provides IPv6 VPN services.
- D. 6VPE tunnels IPv6 packets inside IPv4 packets.
Answer: C
Explanation:
6PE is for transporting ipv6 natively and 6VPE is for ipv6 mpls vpns
NEW QUESTION 2
Which organization provides and promotes a standards-based description of service provider services offering?
- A. MEF
- B. IETF
- C. IEEE
- D. ITU
Answer: A
NEW QUESTION 3
Refer to the exhibit.
Given the output shown, which two statements are true? {Choose two.}
- A. The configured remote AS for neighbor 10.1.1.1 is 1234.
- B. Both prefixes that are referenced by network commands will be visible with the show bgp command from the information that is shown in the output.
- C. The neighbor 10.1.1.1 cannot learn any routes from this router.
- D. The router cannot learn any routes for neighbor 10.1.1.1.
- E. Routes from the Internet VRF that are injected into BGP through redistribution will be advertised to neighbor 10.1.1.1.
Answer: AC
NEW QUESTION 4
Based on the Cisco IOS XR VRF configuration exhibit,
Which two data flows between the MPLS VPNs will be allowed? {Choose two.}
- A. The CustomerA central site can communicate with the CustomerB central site.
- B. The CustomerA central site can communicate with all CustomerA sites.
- C. The CustomerA central site can communicate with all CustomerB sites.
- D. The CustomerA sites can communicate with all CustomerB sites.
Answer: AB
NEW QUESTION 5
Refer to the exhibit.
XR2 must be configured with a static route for 2.2.2.0/24 subnet toward CE2 into the VRF ABC table. Which configuration achieves this goal?
- A. router static vrf ABC2.2.2.0/24 10.10.24.2
- B. router static vrf ABC2.2.2.0/24 10.10.24.2address-family ipv4 unicast
- C. router static vrf ABCaddress-family ipv4 unicast 2.2.2.0/24 10.10.24.2
- D. router staticaddress-family ipv4 unicast vrf ABC2.2.2.0/24 10.10.24.2
Answer: C
NEW QUESTION 6
Which BGP extended community is used to control the distribution of VPN routing information and to identify routers that may receive a set of routes that carry the community?
- A. SOO
- B. RT
- C. opaque
- D. route origin
- E. RD
Answer: B
Explanation:
http://blog.initialdraft.com/archives/1537/
Route Target is a 64-bits BGP community used for tagging prefixes. When exporting prefixes from the VRF, we add to the prefixes a Route-Target community, so when the PE in the remote site has to import prefixes into the VRF, it can easily identify which prefixes to import.
NEW QUESTION 7
In MPLS Layer 3 VPN implementations, which mechanism is used to control which routes are imported to a VRF?
- A. RT
- B. RD
- C. VC ID
- D. PW ID
- E. VRF ID
Answer: A
Explanation:
http://blog.initialdraft.com/archives/1537/
NEW QUESTION 8
Refer to the partial Cisco IOS XR PE router configuration exhibit for supporting a Layer 3 MPLS VPN customer using EIGRP AS 20 as the CE-to-PE routing protocol.
The MPLS VPN customer is having problems receiving the EIGRP routes on the different customer site CE routers.
What is wrong with this configuration that is causing the problem?
- A. The router eigrp command is referencing the wrong AS number.
- B. The redistribute eigrp command is missing the metric transparent option.
- C. The redistribute eigrp command is referencing the wrong AS number.
- D. The redistribute bgp command is missing the subnets option.
- E. The redistribute eigrp command is missing the subnets option.
Answer: C
NEW QUESTION 9
Refer to the Cisco IOS XR router output exhibit,
which method is being used to transport IPv6 traffic over the service provider network?
- A. 6PE
- B. 6VPE
- C. native IPv6
- D. native IPv4
- E. dual stack
Answer: B
Explanation:
NOT SURE THIS MATCHES ANSWER
NEW QUESTION 10
A PE configured with VRF ABC needs to export only subnet 1.1.1.1/32 with RT 100:100 without losing its original RT 200:200 to a remote PE. Which configuration is correct?
A}
B}
C}
D}
- A. Exhibit A
- B. Exhibit B
- C. Exhibit C
- D. Exhibit D
Answer: C
NEW QUESTION 11
In Layer 3 MPLS VPN implementations, if some of the VPNv4 routes on one PE router do not appear on another PE router, what could be the problem?
- A. RD mismatch between the PE routers
- B. RT export and import configuration errors
- C. RD export and import configuration errors
- D. VRF name mismatch between the PE routers
Answer: B
Explanation:
http://blog.initialdraft.com/archives/1537/
NEW QUESTION 12
A network engineer is troubleshooting an MPLS Layer 3 VPN and discovers that routes are being learned by CE routers, but there is no IP connectivity. Which option is the most likely cause?
- A. The provider does not have an end-to-end label switch path.
- B. The customer does not have an end-to-end label switch path.
- C. The customer is not sharing labels with the provider.
- D. The provider is not sharing labels with the customer.
- E. The providers PE to CE routing protocol is misconfigured.
- F. The customers PE to CE routing protocol is misconfigured.
Answer: A
NEW QUESTION 13
Which VPN technology uses the Group Domain of Interpretation as the keying protocol and IPsec for encryption that is often deployed over a private MPLS core network?
- A. DMVPN
- B. GET VPN
- C. SSL VPN
- D. L2TPv3
Answer: B
Explanation:
http://www.cisco.com/en/US/prod/collateral/iosswrel/ps6537/ps6586/ps6635/ps7180/deployment_guide_c07_554 713.html
NEW QUESTION 14
Which option is used as a loop prevention mechanism to support MPLS VPN customers with multihomed sites?
- A. BGP down bit
- B. sham links
- C. AS override
- D. SOO extended BGP community
- E. allow as-in
Answer: D
Explanation:
http://www.cisco.com/en/US/docs/ios/12_4t/12_4t11/htbgpsoo.html Site of Origin BGP Community Attribute
The site-of-origin {SoO} extended community is a BGP extended community attribute that is used to identify routes that have originated from a site so that the readvertisement of that prefix back to the source site can be prevented. The SoO extended community uniquely identifies the site from which a router has learned a route. BGP can use the SoO value associated with a route to prevent routing loops.
NEW QUESTION 15
A Cisco IOS XR device is acting as a PE. It must have an iBGP VPNv4 session with the other PE 2.2.2.2 using source loopback 0. Which configuration achieves this goal?
A}
B}
C}
D}
- A. Exhibit A
- B. Exhibit B
- C. Exhibit C
- D. Exhibit D
Answer: B
NEW QUESTION 16
DRAG DROP
- A. Mastered
- B. Not Mastered
Answer: A
Explanation:
Benefits of IEEE 802.1ah standard
The benefits of IEEE 802.1ah provider backbone bridges are as follows:
• Increased service instance scalability
• MAC address scalability
IEEE 802.1ah Standard for Provider Backbone Bridging Overview
The IEEE 802.1ah Provider Backbone Bridge feature encapsulates or decapsulates end user traffic on a Backbone Edge Bridge {BEB} at the edge of the Provider Backbone Bridged Network {PBBN}. A Backbone Core Bridge {BCB} based network provides internal transport of the IEEE 802.1ah encapsulated frames within the PBBN.
Overview of OAM The advent of Ethernet as a metropolitan and wide-area networking technology has accelerated the need for a new set of OAM protocols. Service provider networks are large and complex with a wide user base, and they often involve different operators that must work together to provide end-to-end services to enterprise customers. While enterprise end-customer demands continue to increase, so do the requirements for service provider Ethernet networks, particularly in the areas of availability and mean time to repair {MTTR}. Ethernet OAM addresses these challenges and more, thereby directly impacting the competitiveness of the service provider. Ethernet has been used as a LAN technology for many years, and enterprises have managed these networks effectively, primarily with the use of Internet protocols such as Simple Network Management Protocol {SNMP}, ICMP Echo {or IP Ping}, IP Traceroute, and Cisco Unidirectional Link Detection Protocol {UDLD} and Layer 2 Traceroute
{supported in Cisco Catalyst® OS and some Cisco IOS® Software-based platforms}. In addition to these troubleshooting protocols, Cisco provides a wealth of other configuration, fault, network management, and performance management tools. Cisco also supports MPLS OAM capabilities such as Virtual Circuit Connectivity Verification {VCCV} and Label Switched Path {LSP} ping on the Carrier Ethernet platforms. To complement these OAM capabilities and to ensure that Ethernet can deliver the required customer service-level agreements {SLAs}, Cisco has developed comprehensive Ethernet and IP SLA agents, along with an embedded event manager {EEM}, and IPTV video quality tools for automated measurement and troubleshooting of Carrier Ethernet deployments.
Ethernet OAM addresses the following challenges:
• The existing protocols mentioned earlier will not work unless the Ethernet layer is operating properly, making Ethernet OAM a prerequisite.
• Many service providers do not want to overlay an IP infrastructure simply for management and troubleshooting of Layer 2 Ethernet services.
• The current management protocols lack the per-customer or per-service granularity that is required to manage the individual Layer 2 Ethernet services provided to enterprises.
• The existing protocols do not assist with provisioning of Ethernet services, which is particularly difficult when the service provider and end customer must coordinate the configurations on their respective Ethernet equipment. Ethernet OAM is a broad topic, but this paper will focus on three main areas of Ethernet OAM that are most in need by service providers and are rapidly evolving in the standards bodies: Service Layer OAM {IEEE 802.1ag Connectivity Fault Management}, Link Layer OAM {IEEE 802.3ah OAM}, and Ethernet Local Management
Interface {MEF-16 E-LMI}. Each of these different OAM protocols has unique objectives and is complementary to the others IEEE 802.1ad[note 1] is an Ethernet networking standard informally known as IEEE 802.1QinQ and is an amendment to IEEE standard IEEE 802.1Q-1998. The technique is also known as provider bridging, Stacked VLANs or simply QinQ or Q-in-Q.
The original 802.1Q specification allows a single VLAN header to be inserted into an Ethernet frame. QinQ allows multiple VLAN headers to be inserted into a single frame, an essential capability for implementing Metro Ethernet network topologies. Just as QinQ extends 802.1Q, QinQ itself is extended by other Metro Ethernet protocols.[specify] In a multiple VLAN header context, out of convenience the term "VLAN tag" or just "tag" for short is often used in place of "802.1Q VLAN header". QinQ allows multiple VLAN tags in an Ethernet frame; together these tags constitute
a tag stack. When used in the context of an Ethernet frame, a QinQ frame is a frame that has 2 VLAN 802.1Q headers {double-tagged}.
There is a mild confusion regarding the naming because the 802.1ad standard was grown out of the 802.1QinQ protocol {which was developed based the trademarked method 802.1Q, with capital "Q" as a distinction instead of the 802.1q as the standardised protocol} which originally used 0x9100 as ethernet type instead of 0x88a8. While the network industry usually mix the naming the proper, standardised name is 802.1ad which sometimes gets appended by the other alternative names mentioned above; the plain "802.1QinQ" name usually refers to the old standard which is now considered obsolete
NEW QUESTION 17
A network engineer working for a very large financial institution must migrate the legacy Frame Relay and ATM virtual circuits over a MPLS VPN solution. Which option is a benefit in choosing a MPLS Layer 3 VPN versus any other Layer 2 VPN design?
- A. An MPLS Layer 3 VPN design offers better scalability for large organizations.
- B. An MPLS Layer 3 VPN design requires less customer edge router configuration than any other Layer 2 VPN implementation.
- C. An MPLS Layer 3 VPN solution provides the possibility to implement overlapping IP addressing.
- D. An MPLS Layer 3 VPN design requires less provider edge router configuration than any other Layer 2 VPN implementation.
Answer: A
NEW QUESTION 18
When implementing EoMPLS on Cisco IOS XR routers, which command under the l2vpn configuration mode is used to define the pseudowire?
- A. pbb
- B. xconnect
- C. connect
- D. bridge
- E. bridge-domain
Answer: B
Explanation:
http://www.cisco.com/en/US/docs/wireless/asr_901/Configuration/Guide/eompls.html
NEW QUESTION 19
A customer needs Internet and MPLS services from the service provider and needs to ensure traffic from the Internet network does not constrain MPLS traffic. Which shared MPLS/Internet service type best accommodates this requirement?
- A. partial separation
- B. full separation
- C. Multisite Internet Access
- D. Internet tunnel over MPLS
Answer: B
NEW QUESTION 20
With Layer 3 MPLS VPN implementations on Cisco IOS XR PE routers, an interface is assigned to a VRF using the vrf command in which configuration mode?
- A. RP/0/RP0/CPU0:PE{config-vrf}#
- B. RP/0/RP0/CPU0:PE{config-if}#
- C. RP/0/RP0/CPU0:PE{config-bgp}#
- D. RP/0/RP0/CPU0:PE{config-bgp-af}#
Answer: B
Explanation: 
NEW QUESTION 21
Which option is a valid Cisco IOS XR BGP Layer 3 IPv4 MPLS VPN configuration?
- A. router bgp 65001no bgp default ipv4-unicast bgp log-neighbor-changesneighbor 1.2.3.4 remote-as 65001 neighbor 1.2.3.4 update-source Loopback0 address-family vpnv4neighbor 1.2.3.4 activateneighbor 1.2.3.4 send-community extended exit-address-familyaddress-family ipv4 vrf VPN redistribute ospf 100
- B. router bgp 65001no bgp default ipv4-unicast bgp log-neighbor-changesneighbor 1.2.3.4 remote-as 65001 neighbor 1.2.3.4 update-source Loopback0 address-family vpnv4neighbor 1.2.3.4 activate exit-address-familyaddress-family ipv4 vrf VPN redistribute ospf 100
- C. router bgp 100address-family vpnv4 unicast neighbor 2.2.2.2remote-as 100update-source Loopback0 address-family vpnv4 unicast!vrf VPN_A rd 100:1address-family ipv4 unicast redistribute ospf 100
- D. router bgp 100address-family vpnv4 unicast neighbor 2.2.2.2remote-as 100update-source Loopback0 address-family ipv4 unicast!vrf VPN_A rd 100:1address-family ipv4 unicast redistribute ospf 100
Answer: C
NEW QUESTION 22
......
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