350-501 Services Practice Question
Exhibit
Refer to the exhibit. ! On PE1 ip vrf CUSTOMER rd 100:1 route-target export 100:100 route-target import 100:100 ! ! On PE1 BGP configuration router bgp 65000 neighbor 10.0.0.2 remote-as 65000 neighbor 10.0.0.2 update-source Loopback0 ! address-family vpnv4 neighbor 10.0.0.2 activate neighbor 10.0.0.2 send-community extended ! address-family ipv4 vrf CUSTOMER neighbor 192.168.1.2 remote-as 65001 neighbor 192.168.1.2 activate ! ! On CE1 interface GigabitEthernet0/0 ip address 192.168.1.2 255.255.255.0 ! router bgp 65001 neighbor 192.168.1.1 remote-as 65000 !
Refer to the exhibit. CE1 is unable to ping the loopback of a remote CE. Which configuration change is required on PE1 to enable communication?
⚠ Common exam trap
Cisco often tests the distinction between configuring a BGP neighbor under the global BGP process versus under a VRF address-family, and the requirement to bind the VRF to the interface, which candidates frequently overlook when focusing only on BGP configuration.
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Apply the VRF to the interface facing CE and ensure BGP VRF neighbor is activated
The configuration is missing the VRF forwarding statement on the interface facing CE1 and the BGP VRF neighbor activation under the VRF address-family. Without applying the VRF to the interface, PE1 cannot associate the CE-facing interface with the correct VRF, and without activating the BGP neighbor under the VRF address-family, PE1 will not establish a BGP session with CE1 or exchange routes for that VRF. This prevents CE1 from learning the remote CE's loopback route.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Add `send-community extended` to the VRF BGP neighbor
Why it's wrong here
Already present under VPNv4, and community is for route-target.
- ✓
Apply the VRF to the interface facing CE and ensure BGP VRF neighbor is activated
Why this is correct
Missing `ip vrf forwarding CUSTOMER` on interface and `neighbor 192.168.1.2 activate` under address-family ipv4 vrf CUSTOMER.
- ✗
Change the VPNv4 neighbor to point to 192.168.1.2
Why it's wrong here
VPNv4 neighbor should be between PEs, not to CE.
- ✗
Set the CE neighbor remote-as to 65000
Why it's wrong here
CE is in different AS 65001.
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JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This 350-501 practice question is part of Courseiva's free Cisco certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the 350-501 exam.