MPLS L3VPN

A network engineer is troubleshooting an MPLS L3VPN where CE1 (192.168.1.0/24) cannot reach CE2 (192.168.2.0/24). The PE routers are running OSPF with the CEs. On PE1, the VRF configuration includes route-target import and export 100:100. The show ip vrf detail command on PE1 shows the VRF is active, but the CE1 loopback is not present in the VRF routing table. The show ip route vrf CUSTOMER command on PE1 shows only directly connected interfaces. What is the most likely cause?

Question 3hardmultiple choice

An engineer is troubleshooting an MPLS L3VPN where CE1 (10.1.1.0/24) cannot reach CE2 (10.2.2.0/24). The PE routers have MP-BGP peering and the VRF is configured with route-target import 100:100. On PE1, the show ip bgp vpnv4 vrf CUSTOMER command shows the route for 10.2.2.0/24 with a next-hop of 192.168.1.2 (the PE2 loopback), but the show ip route vrf CUSTOMER command does not have this route. The show mpls forwarding-table on PE1 does not show a label for 192.168.1.2. What is the most likely cause?

Question 4hardmultiple choice

A network engineer is troubleshooting an MPLS L3VPN where CE1 (10.1.1.0/24) cannot reach CE2 (10.2.2.0/24). The PE routers are using OSPF with the CEs and MP-BGP between them. On PE1, the show ip bgp vpnv4 vrf CUSTOMER command shows the route for 10.2.2.0/24 with a next-hop of 192.168.1.2, and the show ip route vrf CUSTOMER command shows the route as well. However, traffic from CE1 to CE2 fails. The show ip cef vrf CUSTOMER 10.2.2.0 command on PE1 shows the next-hop as 192.168.1.2 but the output interface is 'no route'. What is the most likely cause?

Question 5hardmultiple choice

An engineer is troubleshooting an MPLS L3VPN where CE1 (10.1.1.0/24) cannot reach CE2 (10.2.2.0/24). The PE routers have MP-BGP peering and the VRF is configured with route-target import 100:100. On PE1, the show ip bgp vpnv4 vrf CUSTOMER command shows the route for 10.2.2.0/24 with a next-hop of 192.168.1.2, but the show ip route vrf CUSTOMER command does not have this route. The show ip bgp vpnv4 all 10.2.2.0/24 command on PE1 shows the route is received but not best. What is the most likely cause?

Question 6hardmultiple choice

A network engineer is troubleshooting an MPLS L3VPN where CE1 (10.1.1.0/24) cannot reach CE2 (10.2.2.0/24). The PE routers are using eBGP with the CEs. On PE1, the show ip bgp vpnv4 vrf CUSTOMER command shows the route for 10.2.2.0/24 with a next-hop of 192.168.1.2, and the show ip route vrf CUSTOMER command shows the route. However, traffic from CE1 to CE2 fails. The show ip cef vrf CUSTOMER 10.2.2.0 command on PE1 shows the next-hop as 192.168.1.2 and the output interface as GigabitEthernet0/0. The show mpls forwarding-table 192.168.1.2 detail command on PE1 shows a label but the outgoing interface is 'aggregate'. What is the most likely cause?

Question 7mediummultiple choice

An engineer is troubleshooting an MPLS L3VPN where CE1 (10.1.1.0/24) cannot reach CE2 (10.2.2.0/24). The PE routers are using OSPF with the CEs. On PE1, the show ip bgp vpnv4 vrf CUSTOMER command shows the route for 10.2.2.0/24 with a next-hop of 192.168.1.2, and the show ip route vrf CUSTOMER command shows the route. However, traffic from CE1 to CE2 fails. The show ip cef vrf CUSTOMER 10.2.2.0 command on PE1 shows the next-hop as 192.168.1.2 and the output interface as GigabitEthernet0/0. The show ip route 192.168.1.2 command on PE1 shows the route with a next-hop of 10.0.0.2 and output interface GigabitEthernet0/0. The show mpls forwarding-table 192.168.1.2 detail command on PE1 shows a label with outgoing interface GigabitEthernet0/0. What is the most likely cause?

Question 8hardmultiple choice

A network engineer is troubleshooting an MPLS L3VPN where CE1 (10.1.1.0/24) cannot reach CE2 (10.2.2.0/24). The PE routers are using eBGP with the CEs. On PE1, the show ip bgp vpnv4 vrf CUSTOMER command shows the route for 10.2.2.0/24 with a next-hop of 192.168.1.2, and the show ip route vrf CUSTOMER command shows the route. However, traffic from CE1 to CE2 fails. The show ip bgp vpnv4 vrf CUSTOMER 10.2.2.0/24 command on PE1 shows the route is received and best, but the show ip bgp vpnv4 vrf CUSTOMER 10.2.2.0/24 neighbors 192.168.1.2 advertised-routes command on PE2 shows the route is not advertised. What is the most likely cause?

Question 9mediummultiple choice

An engineer is troubleshooting an MPLS L3VPN where CE1 (10.1.1.0/24) cannot reach CE2 (10.2.2.0/24). The PE routers are using OSPF with the CEs. On PE1, the show ip bgp vpnv4 vrf CUSTOMER command shows the route for 10.2.2.0/24 with a next-hop of 192.168.1.2, and the show ip route vrf CUSTOMER command shows the route. However, traffic from CE1 to CE2 fails. The show ip cef vrf CUSTOMER 10.2.2.0 command on PE1 shows the next-hop as 192.168.1.2 and the output interface as GigabitEthernet0/0. The show mpls forwarding-table 192.168.1.2 detail command on PE1 shows a label with outgoing interface GigabitEthernet0/0. The show ip route 192.168.1.2 command on PE1 shows the route with a next-hop of 10.0.0.2 and output interface GigabitEthernet0/0. The show ip cef 192.168.1.2 command on PE1 shows the next-hop as 10.0.0.2 and output interface GigabitEthernet0/0. What is the most likely cause?

Question 10hardmultiple choice

A network engineer is troubleshooting an MPLS L3VPN where CE1 (10.1.1.0/24) cannot reach CE2 (10.2.2.0/24). The PE routers are using eBGP with the CEs. On PE1, the show ip bgp vpnv4 vrf CUSTOMER command shows the route for 10.2.2.0/24 with a next-hop of 192.168.1.2, and the show ip route vrf CUSTOMER command shows the route. However, traffic from CE1 to CE2 fails. The show ip bgp vpnv4 vrf CUSTOMER 10.2.2.0/24 command on PE1 shows the route is received and best, but the show ip bgp vpnv4 vrf CUSTOMER 10.2.2.0/24 command on PE1 also shows the route has the 'r' flag (RIB-failure). What is the most likely cause?

Question 11mediummultiple choice

A network engineer runs the following command on Router PE1:

PE1# show mpls forwarding-table 192.168.1.0 24

Local Outgoing Prefix Bytes Label Outgoing Next Hop Label Label or Tunnel Id Switched interface 16 Pop Label 192.168.1.0/24 0 Gi0/0 10.1.1.2 17 22 192.168.1.0/24 0 Gi0/1 10.2.2.2

Based on this output, which statement is correct?

Question 12mediummultiple choice

A network engineer runs the following command on Router PE2:

PE2# show ip bgp vpnv4 vrf CUSTOMER_A 10.10.10.0 24

BGP routing table entry for 10.10.10.0/24, version 15 Paths: (1 available, best #1, table CUSTOMER_A) Advertised to update-groups: 1 Refresh Epoch 1 Local, imported path from 10.10.10.0/24

10.1.1.1 (metric 20) from 10.1.1.1 (10.1.1.1)

Origin incomplete, metric 0, localpref 100, valid, internal, best Extended Community: RT:100:100 mpls labels in/out 18/19

Based on this output, what is the problem?

Question 13mediummultiple choice

A network engineer runs the following command on Router P1:

P1# show mpls ldp neighbor

Peer LDP Ident: 10.0.0.2:0, Local LDP Ident: 10.0.0.1:0 TCP connection: 10.0.0.2.646 - 10.0.0.1.48632 State: Oper, Msgs sent/rcvd: 120/118, Downstream Up time: 00:12:34 LDP discovery sources: GigabitEthernet0/0, Src IP addr: 10.1.1.2 Addresses bound to peer LDP Ident:

10.0.0.2         192.168.1.1

Based on this output, which statement is correct?

Question 14mediummultiple choice

A network engineer runs the following command on Router CE1:

CE1# show ip route vrf CUSTOMER_B 10.20.20.0 24

Routing Table: CUSTOMER_B Codes: C - connected, S - static, R - RIP, M - mobile, B - BGP D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2 E1 - OSPF external type 1, E2 - OSPF external type 2 i - IS-IS, su - IS-IS summary, L1 - IS-IS level-1, L2 - IS-IS level-2 ia - IS-IS inter area, * - candidate default, U - per-user static route o - ODR, P - periodic downloaded static route

Gateway of last resort is not set

10.0.0.0/24 is subnetted, 1 subnets
B       10.20.20.0 [20/0] via 10.1.1.2, 00:02:34

Based on this output, what is the problem?

Question 15easymultiple choice

A network engineer runs the following command on Router PE3:

PE3# show ip vrf interfaces
Interface      IP-Address      VRF                              Protocol

Gi0/0 10.1.1.1 CUSTOMER_C up Gi0/1 10.2.2.1 CUSTOMER_D up

Based on this output, which statement is correct?

Question 16hardmultiple choice

A network engineer runs the following command on Router PE4:

PE4# show bgp vpnv4 unicast all summary

BGP router identifier 10.0.0.4, local AS number 65001 BGP table version is 25, main routing table version 25 5 network prefixes using 640 bytes of memory 5 path entries using 400 bytes of memory 3/3 BGP path/bestpath attribute entries using 360 bytes of memory 1 BGP AS-PATH entries using 24 bytes of memory 0 BGP route-map cache entries using 0 bytes of memory 0 BGP filter-list cache entries using 0 bytes of memory BGP using 1424 total bytes of memory BGP activity 15/10 prefixes, 20/15 paths, scan interval 60 secs

Neighbor        V           AS MsgRcvd MsgSent   TblVer  InQ OutQ Up/Down  State/PfxRcd
10.0.0.5        4        65001    1020    1015       25    0    0 00:12:34        5
10.0.0.6        4        65002     500     495       25    0    0 00:06:20        0

Based on this output, what is the problem?

Question 17easymultiple choice

A network engineer runs the following command on Router PE5:

PE5# show ip ospf neighbor

Neighbor ID     Pri   State           Dead Time   Address         Interface
10.0.0.7          1   FULL/DR        00:00:32    10.1.1.7        GigabitEthernet0/0
10.0.0.8          1   FULL/BDR       00:00:35    10.2.2.8        GigabitEthernet0/1

Based on this output, which statement is correct?

Question 18hardmultiple choice

A network engineer runs the following command on Router PE6:

PE6# show mpls forwarding-table

Local Outgoing Prefix Bytes Label Outgoing Next Hop Label Label or Tunnel Id Switched interface 16 Pop Label 10.0.0.1/32 0 Gi0/0 10.1.1.1 17 20 10.0.0.2/32 0 Gi0/1 10.2.2.2 18 Untagged 10.0.0.3/32 0 Gi0/2 10.3.3.3

Based on this output, what is the problem?

Question 19mediummultiple choice

A network engineer runs the following command on Router PE7:

PE7# show bgp vpnv4 unicast vrf CUSTOMER_E labels

Network Next Hop In Label/Out Label

10.10.10.0/24    10.0.0.8            18/22
   10.20.20.0/24    10.0.0.9            19/23

Based on this output, which statement is correct?

Question 20mediummultiple choice

Examine the following partial configuration on a PE router:

interface GigabitEthernet0/1
 ip vrf forwarding CUSTOMER-A
 ip address 10.1.1.1 255.255.255.252

router bgp 65000
 neighbor 192.168.1.1 remote-as 65000
 neighbor 192.168.1.1 update-source Loopback0

! address-family ipv4 vrf CUSTOMER-A

neighbor 10.1.1.2 remote-as 65001
  neighbor 10.1.1.2 activate

exit-address-family

What is the effect of this configuration?

Question 21mediummultiple choice

Consider the following configuration on a PE router:

ip vrf CUSTOMER-B

rd 100:1 route-target export 100:1 route-target import 100:2 !

interface GigabitEthernet0/2
 ip vrf forwarding CUSTOMER-B
 ip address 192.168.2.1 255.255.255.252

What is the effect of this configuration?

Question 22mediummultiple choice

A PE router has the following configuration:

router bgp 65000
 neighbor 10.0.0.1 remote-as 65000
 neighbor 10.0.0.1 update-source Loopback0

! address-family vpnv4

neighbor 10.0.0.1 activate
  neighbor 10.0.0.1 send-community extended

exit-address-family

What is wrong with this configuration?

Question 23mediummultiple choice

Examine the following configuration on a PE router:

ip vrf CUSTOMER-C

rd 200:1 !

interface GigabitEthernet0/3
 ip vrf forwarding CUSTOMER-C
 ip address 10.2.2.1 255.255.255.252

router ospf 1 vrf CUSTOMER-C
 network 10.2.2.0 0.0.0.3 area 0

router bgp 65000

address-family ipv4 vrf CUSTOMER-C redistribute ospf 1 exit-address-family

What is missing from this configuration?

Question 24mediummultiple choice

A PE router has the following configuration:

ip vrf CUSTOMER-D

rd 300:1 route-target export 300:1 route-target import 300:1 !

interface GigabitEthernet0/4
 ip vrf forwarding CUSTOMER-D
 ip address 10.3.3.1 255.255.255.252

router bgp 65000
 neighbor 10.0.0.1 remote-as 65000
 neighbor 10.0.0.1 update-source Loopback0

! address-family vpnv4

neighbor 10.0.0.1 activate
  neighbor 10.0.0.1 send-community extended

exit-address-family ! address-family ipv4 vrf CUSTOMER-D

neighbor 10.3.3.2 remote-as 65002
  neighbor 10.3.3.2 activate

exit-address-family

What is the effect of this configuration?

Question 25mediummultiple choice

Examine the following configuration on a PE router:

ip vrf CUSTOMER-E

rd 400:1 route-target export 400:1 route-target import 400:2 !

interface GigabitEthernet0/5
 ip vrf forwarding CUSTOMER-E
 ip address 10.4.4.1 255.255.255.252

router bgp 65000
 neighbor 10.0.0.1 remote-as 65000
 neighbor 10.0.0.1 update-source Loopback0

! address-family vpnv4

neighbor 10.0.0.1 activate
  neighbor 10.0.0.1 send-community extended

exit-address-family ! address-family ipv4 vrf CUSTOMER-E

neighbor 10.4.4.2 remote-as 65003
  neighbor 10.4.4.2 activate
  neighbor 10.4.4.2 route-map SET-COMMUNITY in

exit-address-family ! route-map SET-COMMUNITY permit 10 set community 100:100

What is the effect of the route-map on the incoming routes from the CE?

Question 26easymultiple choice

In MPLS L3VPN, what is the purpose of the Route Distinguisher (RD)?

Question 27easymultiple choice

In MPLS L3VPN, what is the default behavior when a PE router receives a VPNv4 route with a Route Target that does not match any import RT on any VRF?

Question 28mediummultiple choice

Which of the following statements about MPLS L3VPN label operations is true?

Question 29mediummulti select

Which TWO commands can be used to verify the MPLS L3VPN label forwarding table on a PE router? (Choose TWO.)

Question 30mediummulti select

Which TWO statements about route targets (RT) in MPLS L3VPN are true? (Choose TWO.)

Question 31hardmulti select

Full Practice Test →All Objectives

Which THREE symptoms indicate a misconfiguration in the MPLS L3VPN control plane between two PEs? (Choose THREE.)

More MPLS L3VPN questions available in the full practice test.

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All 300-410 Objectives

Objective 202.0

MPLS L3VPN

300-410 Practice Questions

300-410 MPLS L3VPN — Practice Questions

30 questions from this objective

Question 2mediummultiple choice

A network engineer is troubleshooting an MPLS L3VPN where CE1 (192.168.1.0/24) cannot reach CE2 (192.168.2.0/24). The PE routers are running OSPF with the CEs. On PE1, the VRF configuration includes route-target import and export 100:100. The show ip vrf detail command on PE1 shows the VRF is active, but the CE1 loopback is not present in the VRF routing table. The show ip route vrf CUSTOMER command on PE1 shows only directly connected interfaces. What is the most likely cause?

Question 3hardmultiple choice

An engineer is troubleshooting an MPLS L3VPN where CE1 (10.1.1.0/24) cannot reach CE2 (10.2.2.0/24). The PE routers have MP-BGP peering and the VRF is configured with route-target import 100:100. On PE1, the show ip bgp vpnv4 vrf CUSTOMER command shows the route for 10.2.2.0/24 with a next-hop of 192.168.1.2 (the PE2 loopback), but the show ip route vrf CUSTOMER command does not have this route. The show mpls forwarding-table on PE1 does not show a label for 192.168.1.2. What is the most likely cause?

Question 4hardmultiple choice

A network engineer is troubleshooting an MPLS L3VPN where CE1 (10.1.1.0/24) cannot reach CE2 (10.2.2.0/24). The PE routers are using OSPF with the CEs and MP-BGP between them. On PE1, the show ip bgp vpnv4 vrf CUSTOMER command shows the route for 10.2.2.0/24 with a next-hop of 192.168.1.2, and the show ip route vrf CUSTOMER command shows the route as well. However, traffic from CE1 to CE2 fails. The show ip cef vrf CUSTOMER 10.2.2.0 command on PE1 shows the next-hop as 192.168.1.2 but the output interface is 'no route'. What is the most likely cause?

Question 5hardmultiple choice

An engineer is troubleshooting an MPLS L3VPN where CE1 (10.1.1.0/24) cannot reach CE2 (10.2.2.0/24). The PE routers have MP-BGP peering and the VRF is configured with route-target import 100:100. On PE1, the show ip bgp vpnv4 vrf CUSTOMER command shows the route for 10.2.2.0/24 with a next-hop of 192.168.1.2, but the show ip route vrf CUSTOMER command does not have this route. The show ip bgp vpnv4 all 10.2.2.0/24 command on PE1 shows the route is received but not best. What is the most likely cause?

Question 6hardmultiple choice

A network engineer is troubleshooting an MPLS L3VPN where CE1 (10.1.1.0/24) cannot reach CE2 (10.2.2.0/24). The PE routers are using eBGP with the CEs. On PE1, the show ip bgp vpnv4 vrf CUSTOMER command shows the route for 10.2.2.0/24 with a next-hop of 192.168.1.2, and the show ip route vrf CUSTOMER command shows the route. However, traffic from CE1 to CE2 fails. The show ip cef vrf CUSTOMER 10.2.2.0 command on PE1 shows the next-hop as 192.168.1.2 and the output interface as GigabitEthernet0/0. The show mpls forwarding-table 192.168.1.2 detail command on PE1 shows a label but the outgoing interface is 'aggregate'. What is the most likely cause?

Question 7mediummultiple choice

An engineer is troubleshooting an MPLS L3VPN where CE1 (10.1.1.0/24) cannot reach CE2 (10.2.2.0/24). The PE routers are using OSPF with the CEs. On PE1, the show ip bgp vpnv4 vrf CUSTOMER command shows the route for 10.2.2.0/24 with a next-hop of 192.168.1.2, and the show ip route vrf CUSTOMER command shows the route. However, traffic from CE1 to CE2 fails. The show ip cef vrf CUSTOMER 10.2.2.0 command on PE1 shows the next-hop as 192.168.1.2 and the output interface as GigabitEthernet0/0. The show ip route 192.168.1.2 command on PE1 shows the route with a next-hop of 10.0.0.2 and output interface GigabitEthernet0/0. The show mpls forwarding-table 192.168.1.2 detail command on PE1 shows a label with outgoing interface GigabitEthernet0/0. What is the most likely cause?

Question 8hardmultiple choice

A network engineer is troubleshooting an MPLS L3VPN where CE1 (10.1.1.0/24) cannot reach CE2 (10.2.2.0/24). The PE routers are using eBGP with the CEs. On PE1, the show ip bgp vpnv4 vrf CUSTOMER command shows the route for 10.2.2.0/24 with a next-hop of 192.168.1.2, and the show ip route vrf CUSTOMER command shows the route. However, traffic from CE1 to CE2 fails. The show ip bgp vpnv4 vrf CUSTOMER 10.2.2.0/24 command on PE1 shows the route is received and best, but the show ip bgp vpnv4 vrf CUSTOMER 10.2.2.0/24 neighbors 192.168.1.2 advertised-routes command on PE2 shows the route is not advertised. What is the most likely cause?

Question 9mediummultiple choice

An engineer is troubleshooting an MPLS L3VPN where CE1 (10.1.1.0/24) cannot reach CE2 (10.2.2.0/24). The PE routers are using OSPF with the CEs. On PE1, the show ip bgp vpnv4 vrf CUSTOMER command shows the route for 10.2.2.0/24 with a next-hop of 192.168.1.2, and the show ip route vrf CUSTOMER command shows the route. However, traffic from CE1 to CE2 fails. The show ip cef vrf CUSTOMER 10.2.2.0 command on PE1 shows the next-hop as 192.168.1.2 and the output interface as GigabitEthernet0/0. The show mpls forwarding-table 192.168.1.2 detail command on PE1 shows a label with outgoing interface GigabitEthernet0/0. The show ip route 192.168.1.2 command on PE1 shows the route with a next-hop of 10.0.0.2 and output interface GigabitEthernet0/0. The show ip cef 192.168.1.2 command on PE1 shows the next-hop as 10.0.0.2 and output interface GigabitEthernet0/0. What is the most likely cause?

Question 10hardmultiple choice

A network engineer is troubleshooting an MPLS L3VPN where CE1 (10.1.1.0/24) cannot reach CE2 (10.2.2.0/24). The PE routers are using eBGP with the CEs. On PE1, the show ip bgp vpnv4 vrf CUSTOMER command shows the route for 10.2.2.0/24 with a next-hop of 192.168.1.2, and the show ip route vrf CUSTOMER command shows the route. However, traffic from CE1 to CE2 fails. The show ip bgp vpnv4 vrf CUSTOMER 10.2.2.0/24 command on PE1 shows the route is received and best, but the show ip bgp vpnv4 vrf CUSTOMER 10.2.2.0/24 command on PE1 also shows the route has the 'r' flag (RIB-failure). What is the most likely cause?

Question 11mediummultiple choice

A network engineer runs the following command on Router PE1:

PE1# show mpls forwarding-table 192.168.1.0 24

Local Outgoing Prefix Bytes Label Outgoing Next Hop Label Label or Tunnel Id Switched interface 16 Pop Label 192.168.1.0/24 0 Gi0/0 10.1.1.2 17 22 192.168.1.0/24 0 Gi0/1 10.2.2.2

Based on this output, which statement is correct?

Question 12mediummultiple choice

A network engineer runs the following command on Router PE2:

PE2# show ip bgp vpnv4 vrf CUSTOMER_A 10.10.10.0 24

BGP routing table entry for 10.10.10.0/24, version 15 Paths: (1 available, best #1, table CUSTOMER_A) Advertised to update-groups: 1 Refresh Epoch 1 Local, imported path from 10.10.10.0/24

10.1.1.1 (metric 20) from 10.1.1.1 (10.1.1.1)

Origin incomplete, metric 0, localpref 100, valid, internal, best Extended Community: RT:100:100 mpls labels in/out 18/19

Based on this output, what is the problem?

Question 13mediummultiple choice

A network engineer runs the following command on Router P1:

P1# show mpls ldp neighbor

10.0.0.2         192.168.1.1

Based on this output, which statement is correct?

Question 14mediummultiple choice

A network engineer runs the following command on Router CE1:

CE1# show ip route vrf CUSTOMER_B 10.20.20.0 24

Gateway of last resort is not set

10.0.0.0/24 is subnetted, 1 subnets
B       10.20.20.0 [20/0] via 10.1.1.2, 00:02:34

Based on this output, what is the problem?

Question 15easymultiple choice

A network engineer runs the following command on Router PE3:

PE3# show ip vrf interfaces
Interface      IP-Address      VRF                              Protocol

Gi0/0 10.1.1.1 CUSTOMER_C up Gi0/1 10.2.2.1 CUSTOMER_D up

Based on this output, which statement is correct?

Question 16hardmultiple choice

A network engineer runs the following command on Router PE4:

PE4# show bgp vpnv4 unicast all summary

Neighbor        V           AS MsgRcvd MsgSent   TblVer  InQ OutQ Up/Down  State/PfxRcd
10.0.0.5        4        65001    1020    1015       25    0    0 00:12:34        5
10.0.0.6        4        65002     500     495       25    0    0 00:06:20        0

Based on this output, what is the problem?

Question 17easymultiple choice

A network engineer runs the following command on Router PE5:

PE5# show ip ospf neighbor

Neighbor ID     Pri   State           Dead Time   Address         Interface
10.0.0.7          1   FULL/DR        00:00:32    10.1.1.7        GigabitEthernet0/0
10.0.0.8          1   FULL/BDR       00:00:35    10.2.2.8        GigabitEthernet0/1

Based on this output, which statement is correct?

Question 18hardmultiple choice

A network engineer runs the following command on Router PE6:

PE6# show mpls forwarding-table

Based on this output, what is the problem?

Question 19mediummultiple choice

A network engineer runs the following command on Router PE7:

PE7# show bgp vpnv4 unicast vrf CUSTOMER_E labels

Network Next Hop In Label/Out Label

10.10.10.0/24    10.0.0.8            18/22
   10.20.20.0/24    10.0.0.9            19/23

Based on this output, which statement is correct?

Question 20mediummultiple choice

Examine the following partial configuration on a PE router:

interface GigabitEthernet0/1
 ip vrf forwarding CUSTOMER-A
 ip address 10.1.1.1 255.255.255.252

router bgp 65000
 neighbor 192.168.1.1 remote-as 65000
 neighbor 192.168.1.1 update-source Loopback0

! address-family ipv4 vrf CUSTOMER-A

neighbor 10.1.1.2 remote-as 65001
  neighbor 10.1.1.2 activate

exit-address-family

What is the effect of this configuration?

Question 21mediummultiple choice

Consider the following configuration on a PE router:

ip vrf CUSTOMER-B

rd 100:1 route-target export 100:1 route-target import 100:2 !

interface GigabitEthernet0/2
 ip vrf forwarding CUSTOMER-B
 ip address 192.168.2.1 255.255.255.252

What is the effect of this configuration?

Question 22mediummultiple choice

A PE router has the following configuration:

router bgp 65000
 neighbor 10.0.0.1 remote-as 65000
 neighbor 10.0.0.1 update-source Loopback0

! address-family vpnv4

neighbor 10.0.0.1 activate
  neighbor 10.0.0.1 send-community extended

exit-address-family

What is wrong with this configuration?

Question 23mediummultiple choice

Examine the following configuration on a PE router:

ip vrf CUSTOMER-C

rd 200:1 !

interface GigabitEthernet0/3
 ip vrf forwarding CUSTOMER-C
 ip address 10.2.2.1 255.255.255.252

router ospf 1 vrf CUSTOMER-C
 network 10.2.2.0 0.0.0.3 area 0

router bgp 65000

address-family ipv4 vrf CUSTOMER-C redistribute ospf 1 exit-address-family

What is missing from this configuration?

Question 24mediummultiple choice

A PE router has the following configuration:

ip vrf CUSTOMER-D

rd 300:1 route-target export 300:1 route-target import 300:1 !

interface GigabitEthernet0/4
 ip vrf forwarding CUSTOMER-D
 ip address 10.3.3.1 255.255.255.252

router bgp 65000
 neighbor 10.0.0.1 remote-as 65000
 neighbor 10.0.0.1 update-source Loopback0

! address-family vpnv4

neighbor 10.0.0.1 activate
  neighbor 10.0.0.1 send-community extended

exit-address-family ! address-family ipv4 vrf CUSTOMER-D

neighbor 10.3.3.2 remote-as 65002
  neighbor 10.3.3.2 activate

exit-address-family

What is the effect of this configuration?

Question 25mediummultiple choice

Examine the following configuration on a PE router:

ip vrf CUSTOMER-E

rd 400:1 route-target export 400:1 route-target import 400:2 !

interface GigabitEthernet0/5
 ip vrf forwarding CUSTOMER-E
 ip address 10.4.4.1 255.255.255.252

router bgp 65000
 neighbor 10.0.0.1 remote-as 65000
 neighbor 10.0.0.1 update-source Loopback0

! address-family vpnv4

neighbor 10.0.0.1 activate
  neighbor 10.0.0.1 send-community extended

exit-address-family ! address-family ipv4 vrf CUSTOMER-E

neighbor 10.4.4.2 remote-as 65003
  neighbor 10.4.4.2 activate
  neighbor 10.4.4.2 route-map SET-COMMUNITY in

exit-address-family ! route-map SET-COMMUNITY permit 10 set community 100:100

What is the effect of the route-map on the incoming routes from the CE?

Question 26easymultiple choice

In MPLS L3VPN, what is the purpose of the Route Distinguisher (RD)?

Question 27easymultiple choice

In MPLS L3VPN, what is the default behavior when a PE router receives a VPNv4 route with a Route Target that does not match any import RT on any VRF?

Question 28mediummultiple choice

Which of the following statements about MPLS L3VPN label operations is true?

Question 29mediummulti select

Which TWO commands can be used to verify the MPLS L3VPN label forwarding table on a PE router? (Choose TWO.)

Question 30mediummulti select

Which TWO statements about route targets (RT) in MPLS L3VPN are true? (Choose TWO.)

Question 31hardmulti select