hardMultiple Choice
300-410 Practice Question: Runs the following command to troubleshoot a BGP…
A network engineer runs the following command to troubleshoot a BGP Troubleshooting issue:
R1# show ip bgp vpnv4 vrf CUSTOMER routes
BGP table version is 10, local router ID is 1.1.1.1 Status codes: s suppressed, d damped, h history, * valid, > best, i - internal, r RIB-failure, S Stale, m multipath, b backup-path, f RT-Filter, x best-external, a additional-path, c RIB-compressed, Origin codes: i - IGP, e - EGP, ? - incomplete
Network Next Hop Metric LocPrf Weight Path Route Distinguisher: 100:1 (default for vrf CUSTOMER) *> 10.0.0.0/24 10.1.1.2 0 100 0 65001 i *> 192.168.1.0/24 10.1.1.2 0 100 0 65001 i
Total number of prefixes 2
What does this output indicate?
⚠ Common exam trap
The trap is misreading status codes — candidates see routes in the BGP table and assume they are installed, or see the RD and assume it is misconfigured, when the '>' marker and default RD label confirm normal operation.
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
✓
The VRF CUSTOMER has two routes, both learned via BGP from AS 65001.
The output shows two prefixes (10.0.0.0/24 and 192.168.1.0/24) in the VRF CUSTOMER's VPNv4 BGP table, both marked with '*' (valid) and '>' (best), with next hop 10.1.1.2 and AS path 65001. This confirms both routes were learned via eBGP from AS 65001 and are valid and selected as best. The Route Distinguisher 100:1 is the default for the VRF, which is normal and correct.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
The VRF CUSTOMER has two routes, both learned via BGP from AS 65001.
Why this is correct
Both prefixes carry the next hop 10.1.1.2 with AS path 65001, and the '>' best-path marker confirms they are installed in the VRF CUSTOMER table. The route distinguisher 100:1 identifies this as the default VPNv4 table for that VRF, so both routes were learned from AS 65001.
- ✗
The VRF CUSTOMER is not receiving any routes because the RD is incorrect.
Why it's wrong here
The output lists two valid, best routes in the VRF CUSTOMER table, so routes are clearly being received; an incorrect route distinguisher would prevent the VRF from importing prefixes at all. The RD here (100:1) is merely the label identifying the VRF, not the import criterion — that role belongs to the route target.
- ✗
The VRF CUSTOMER has two routes, but they are not installed in the routing table.
Why it's wrong here
Each prefix carries the > and * status codes, meaning BGP selected it as best and it is valid for RIB installation; a RIB-failure would instead show the r code. The output confirms routes are present and eligible, not withheld from the routing table.
- ✗
The VRF CUSTOMER has two routes, but they are filtered by RT import policy.
Why it's wrong here
Route target import filtering would exclude prefixes before they appear in the VRF table, yet both prefixes are shown as valid and best. The RT extended community governs import into the VRF; here it has evidently permitted both routes, so no filtering is occurring.
Go deeper
Related to this question
Learn chapter
Introduction to ENARSI Exam and Network Fundamentals
Key term
MPLS Layer 3 VPN
A technology that uses Multiprotocol Label Switching to create secure, scalable virtual private networks that connect multiple sites at the network layer, where the service provider manages routing between customer sites.
Key term
MP-BGP for VPN
MP-BGP for VPN is an extension of the Border Gateway Protocol that carries multiple types of network layer information to enable scalable, isolated virtual private networks over a shared provider infrastructure.
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JA
Written and reviewed by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
Last reviewed September 2026 · checked against the official Cisco exam blueprint
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