Instant Access Cisco.300-515.v2026-09-03.q108 Actual Practice Test Engine for Free (Page 17)

Question 76

What is the primary benefit provided by Unified MPLS?

A.It eliminates the need for labels to route traffic between autonomous systems.
B.It expands the capability of link-state routing protocols to hold multiple routes.
C.It uses BGP to transport labels between different IGP domains which reduces the need to exceed the router's IGP route threshold.
D.It allows IPV6 routes to be carried outside of BGP.

Question 77

Refer to the exhibit.

A network engineer has been called to configure the four PE devices in order to enable full communication among the four CE devices connected to them. While starting to configure, he experienced a connectivity issue. Which two tasks should the engineer perform in order to begin the process correctly? (Choose two.)

A.Configure PE3 to import route-targets 100:1 and 200:2.
B.Configure PE2 to export route-targets 300:3 and 400:4.
C.Configure PE3 to export route-targets 100:1 and 200:2.
D.Configure PE4 to import route-targets 101:1 and 202:2.
E.Configure PE1 to import route-targets 300:3 and 400:4.

Question 78

SIMULATION 7
Guidelines
This is a lab item in which tasks will be performed on virtual devices.
* Refer to the Tasks tab to view the tasks for this lab item.
* Refer to the Topology tab to access the device console(s) and perform the tasks.
* Console access is available for all required devices by clicking the device icon or using the tab(s) above the console window.
* All necessary pre-configurations have been applied.
* Do not remove any existing configurations from the devices, only those necessary to make the appropriate changes required to fulfill the listed tasks.
* Do not change the enable password or hostname for any device.
* Save your configurations to NVRAM before moving to the next item.
* Click Next at the bottom of the screen to submit this lab and move to the next question.
* When Next is clicked, the lab closes and cannot be reopened.
Topology

Tasks
CE1 and CE2 are IPv6 Customer Premise Equipment of two customers that communicate with each other through the MPLS L3VPN core comprising Provide Edge PE1, PE2, and route- reflector RR.
Perform the below configuration and verification tasks as noted.
1. Troubleshoot and modify the CEs to establish IPv6 BGP sessions with the PEs.
2. Troubleshoot and modify the PEs to receive the remote CE's advertised route in their BGP VRF table.
Initial configuration with IPv6 addressing has been completed. Do not change the configurations except to fulfill the abovementioned tasks. Apply the solution with the minimum configuration.

Correct Answer:

1. On CE1 and CE2 - fix IPv6 eBGP toward the PE.
2. On PE1 and PE2 - activate the VRF IPv6 address-family and the CE neighbors so the PE learns the CE loopback prefixes in the VRF BGP table.
Configuration sketch
1. CEs - establish IPv6 BGP sessions with PEs
On CE1 (use the AS numbers and IPv6 addresses already present in the config):
ipv6 unicast-routing
router bgp <CE1-AS>
neighbor 172:1:2::PE1 remote-as <PE-AS>
!
address-family ipv6
neighbor 172:1:2::PE1 activate
network 192:1:1:1::1/128
exit-address-family
On CE2:
ipv6 unicast-routing
router bgp <CE2-AS>
neighbor 172:4:5::PE2 remote-as <PE-AS>
!
address-family ipv6
neighbor 172:4:5::PE2 activate
network 192:5:5:5::5/128
network 192:55:55:55::55/128
exit-address-family
If the neighbors already exist under router bgp, only the address-family ipv6 section and activate/network lines are needed.
2. PEs - ensure IPv6 VPNv6/VRF BGP is receiving the CE routes
On PE1, in the VRF used for CE1 (for example CUST-A):
router bgp <PE-AS>
address-family ipv6 vrf CUST-A
neighbor 172:1:2::CE1 activate
redistribute connected
exit-address-family
On PE2, in the same VRF:
router bgp <PE-AS>
address-family ipv6 vrf CUST-A
neighbor 172:4:5::CE2 activate
redistribute connected
exit-address-family
Verification (examples)
On CEs:
show bgp ipv6 unicast summary - eBGP session to the PE must be Established.
On PEs:
show bgp ipv6 vrf CUST-A - should list 192:1:1:1::1/128, 192:5:5:5::5/128 and
192:55:55:55::55/128.
From CE1:
ping ipv6 192:5:5:5::5 source 192:1:1:1::1 and
ping ipv6 192:55:55:55::55 source 192:1:1:1::1 should succeed.
The CE-PE links are IPv6 only, so BGP must use IPv6 neighbors and the IPv6 unicast address- family. Without activating the neighbors under the IPv6 address-family and advertising the loopback prefixes, the CE routers neither form IPv6 BGP sessions nor send their routes to the PEs.
On the PEs, the VRF for this customer must run the IPv6 VRF address-family and have the CE neighbors activated there. Only in that address-family are the CE IPv6 routes installed into the VRF BGP table. By also redistributing connected (or explicitly advertising the CE-connected prefixes), the PE injects the CE loopback routes into VPNv6 so that they are carried across the MPLS core and imported into the opposite PE's VRF, allowing full IPv6 reachability between the CE loopback addresses.

Question 79

Drag and drop the EVPN components from the left onto the correct planes on the right.

Question 80

Which two are characteristics of using a non-MPLS peer-to-peer model over a traditional overlay model? (Choose two.)

A.Routing information is exchanged between the customer router and one or a few PEs.
B.The configuration on a newly added site PE is updated automatically.
C.The model is suited for nonredundant configurations.
D.Provider routers know the customer network topology.
E.The customer specifies the exact site-to-site traffic profile.

Question 76

Question 77

Question 78

Question 79

Question 80

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