mediumMultiple ChoiceObjective-mapped
300-410 Practice Question: Runs the following command on Router R1: R1# show…
A network engineer runs the following command on Router R1:
R1# show bgp ipv4 unicast 10.5.5.0/24
BGP routing table entry for 10.5.5.0/24, version 12 Paths: (1 available, best #1, table default) Advertised to update-groups: 1 Refresh Epoch 1 65007
10.1.17.7 from 10.1.17.7 (10.7.7.7)
Origin IGP, metric 0, localpref 100, valid, external, best rx pathid: 0, tx pathid: 0x0
Based on this output, what does the 'r' in the status codes indicate if present? (Not shown here, but the engineer notices a similar route with 'r' status.)
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 route is a RIB-failure, meaning it is not installed in the routing table because another route with a lower administrative distance exists.
The 'r' status code stands for RIB-failure, meaning the route is valid in BGP but not installed in the routing table because a route with a lower administrative distance (e.g., from OSPF or EIGRP) already exists.
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 route is suppressed by a route-map.
Why it's wrong here
Suppressed routes are marked with 's', not 'r'.
- ✗
The route is not valid due to next-hop unreachability.
Why it's wrong here
Invalid routes are not marked with 'r'; they would not have a status code like *.
- ✓
The route is a RIB-failure, meaning it is not installed in the routing table because another route with a lower administrative distance exists.
Why this is correct
RIB-failure (r) indicates the BGP route is valid but not installed in the RIB due to a better route from another source.
- ✗
The route is dampened.
Why it's wrong here
Dampened routes are marked with 'd', not 'r'.
Visual reference
Quick reference
Routing Protocol Comparison
| Protocol | Metric | Max Hops | Algorithm | Type |
|---|---|---|---|---|
| RIP v2 | Hop count | 15 | Bellman-Ford | Distance vector |
| OSPF | Cost (bandwidth) | Unlimited | Dijkstra (SPF) | Link state |
| EIGRP | Composite metric | Unlimited | DUAL | Hybrid |
| IS-IS | Cost | Unlimited | Dijkstra | Link state |
| BGP | Policy / attributes | Unlimited | Path vector | Path vector |
RIP's 15-hop limit makes it unsuitable for large networks. OSPF and EIGRP dominate modern enterprise deployments.
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
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