easyMultiple Choice
CCNP Practice Question: The default value of the BGP 'weight' attribute…
What is the default value of the BGP 'weight' attribute for routes learned from a neighbor?
⚠ Common exam trap
Cisco often tests the distinction between the default weight for locally originated routes (32768) versus routes learned from a neighbor (0), causing candidates to mistakenly choose 32768 when asked about learned routes.
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
✓
0
The BGP 'weight' attribute is a Cisco-proprietary attribute that is locally significant only to the router on which it is configured. By default, routes learned from a BGP neighbor have a weight of 0, while routes originated locally on the router (e.g., via network or aggregate-address commands) have a weight of 32768. Weight is the highest priority BGP attribute in the path selection process, so a route with a higher weight is preferred over one with a lower weight.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
0
Why this is correct
Correct. For any route that is learned via a BGP session (eBGP or iBGP), the default Cisco weight is 0. Weight is the first attribute evaluated in the BGP best-path selection algorithm, and a higher weight is preferred; since no explicit weight configuration has been applied, the default of 0 is the correct value.
- ✗
100
Why it's wrong here
Incorrect. 100 is the default local preference, not the default weight. Local preference is an AS-wide BGP attribute that is passed only to iBGP peers and influences the exit point for outbound traffic, with higher values preferred. This value does not apply to weight, which is a Cisco-proprietary, per-router attribute and defaults to 0 for routes learned from neighbors.
- ✗
32768
Why it's wrong here
Incorrect. 32768 is the default weight assigned to locally originated BGP routes—those injected via the network command, redistribute, or aggregate commands—not to routes learned from BGP neighbors. Locally originated routes receive the highest possible weight (32768) so they are always preferred over received routes. A route learned from a neighbor remains at the default weight of 0 unless explicitly changed.
- ✗
1
Why it's wrong here
Incorrect. There is no BGP default weight of 1. The weight attribute has a valid range of 0–65535, and Cisco sets the default to 0 for all routes received from BGP peers; a weight of 1 would only appear if explicitly configured, for example through a route-map or the neighbor weight command. This value is often confused with administrative distance (e.g., eBGP AD of 20 or iBGP AD of 200) or with an IGP metric, but it is not a BGP default weight.
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
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