HPE7-A08 · Question #22
Two companies have merged, and BGP is used for routing. The customer has informed you that they currently have about 3600 routes in the routing table and would like to keep the total number of…
The correct answer is C. Enforce routing policies with aggregation. The routing table shown contains many individual /24 prefixes. To keep the total route count below the customer’s 5000-route requirement, the company must reduce the number of specific prefixes being advertised. The correct way to accomplish this is to implement route…
Question
Two companies have merged, and BGP is used for routing. The customer has informed you that they currently have about 3600 routes in the routing table and would like to keep the total number of routes below 5000. A BGP routing table from the company to be merged is provided as an example below:
Based on the provided example of the BGP routing table from the merging company, what should the customer consider to achieve the routing table size requirement?
Exhibit
Options
- ASet the route metrics equal for each prefix
- BAdvertise routes only using a primary path
- CEnforce routing policies with aggregation
- DImport only 0.0.0.0/0 route
How the community answered
(25 responses)- A28% (7)
- B8% (2)
- C48% (12)
- D16% (4)
Explanation
The routing table shown contains many individual /24 prefixes. To keep the total route count below the customer’s 5000-route requirement, the company must reduce the number of specific prefixes being advertised. The correct way to accomplish this is to implement route aggregation in BGP. Aggregation summarizes multiple contiguous prefixes into a single advertisement, significantly reducing the number of routes learned and stored in the routing table.
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