hardMultiple Select
300-410 Practice Question: Which TWO statements correctly describe the…
Which TWO statements correctly describe the behavior of BGP conditional route injection? (Choose TWO.)
⚠ Common exam trap
The trap is confusing exist-map and inject-map roles — candidates often swap them, thinking the inject-map defines the condition and the exist-map defines the prefix, which reverses the actual behavior.
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 condition for injection is defined by an exist-map, which must match a less specific prefix in the BGP table.
Option B is correct because conditional route injection uses an exist-map that references a less specific (covering) prefix which must already be present in the BGP table for the injection to occur. Option C is correct because the inject-map defines the more specific prefix (or prefixes) to be conditionally injected, along with any optional BGP attributes such as community or local preference. Option A is wrong because conditional injection does not automatically redistribute connected or static routes; it injects a specific prefix defined in the inject-map. Option D is wrong because 'show ip bgp neighbors' does not display a count of injected prefixes per neighbor; verification is done with commands like 'show ip bgp injected-paths' or 'show ip bgp'. Option E is wrong because the injected prefix does not need to be learned from the neighbor referenced in the inject-map; the exist-map only requires the less specific prefix to exist in the BGP table.
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 injected route is automatically redistributed into connected and static routes.
Why it's wrong here
Conditional route injection installs a route into the BGP table only when a specified condition route exists; it does not redistribute connected or static routes into BGP. Redistribution is the tempting association because both manipulate the RIB, but CRI injects a pre-defined prefix, not existing IGP routes.
- ✓
The condition for injection is defined by an exist-map, which must match a less specific prefix in the BGP table.
Why this is correct
Conditional injection uses an exist-map to test a condition route. That map matches a less specific prefix already present in the BGP table; injection proceeds only while that covering route exists, tying the trigger to a broader aggregate.
- ✓
The inject-map specifies the more specific prefix to be injected along with optional attributes.
Why this is correct
The inject-map defines the actual routes to be added, listing the more specific prefixes plus any optional BGP attributes such as communities or local preference. It supplies the injected content, while the exist-map supplies the condition.
- ✗
The 'show ip bgp neighbors' command displays the number of injected prefixes per neighbor.
Why it's wrong here
Conditional route injection is verified with 'show ip bgp injected-paths', which lists injected prefixes; no per-neighbour injected-prefix counter appears in neighbour output. Neighbour output is correct for reviewing session state, timers and prefix counts exchanged with a peer.
- ✗
The injected prefix must be learned from the neighbor specified in the inject-map.
Why it's wrong here
The inject-map's exist-map verifies the aggregate or prefix is present in the BGP table, not that the injected prefix was learned from the specified neighbour. It is tempting because neighbour-based conditions belong in a neighbour's route-map or prefix-list, where matching on the advertising peer is exactly the intended mechanism.
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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
This 300-410 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 300-410 exam.