Prepare with Cisco 642-661 exam practice material, pass for sure
Updated: Sep 12, 2026
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Cisco 642-661 Exam Overview:
| Certification Vendor: | Cisco |
|---|---|
| Exam Name: | Configuring BGP on Cisco Routers (BGP) |
| Exam Number: | 642-661 |
| Exam Format: | Scenario-based, Multiple Answer, Multiple Choice |
| Passing Score: | Not publicly disclosed |
| Exam Price: | USD 150 |
| Exam Duration: | 90 minutes |
| Available Languages: | English |
| Certificate Validity Period: | 3 years |
| Real Exam Qty: | 60-70 |
| Recommended Training: | Configuring BGP on Cisco Routers (BGP v4.1) |
| Exam Registration: | Pearson VUE |
| Sample Questions: | Cisco 642-661 Sample Questions |
| Exam Way: | Proctored at Pearson VUE testing centers; exam retired |
| Pre Condition: | No mandatory prerequisites; recommended knowledge of IP routing, OSPF, EIGRP |
| Official Syllabus URL: | https://www.cisco.com/site/us/en/learn/training-certifications/exams/retired.html |
Cisco 642-661 Exam Syllabus Topics:
| Section | Weight | Objectives |
|---|---|---|
| Topic 1: Scaling BGP Networks | 20% | - Peer groups and peer sessions - Route aggregation and summarization - Route reflectors and cluster lists - BGP confederations - Route dampening |
| Topic 2: BGP Policy Control & Filtering | 25% | - Route maps and policy modification - Outbound Route Filtering (ORF) - AS-Path filters and regular expressions - Prefix lists and distribute lists |
| Topic 3: BGP Path Attributes & Route Selection | 25% | - Well-known and optional attributes - BGP route selection process - Communities and extended communities - Weight, Local Preference, AS-Path, Origin, MED |
| Topic 4: Multihoming & Advanced BGP | 10% | - Private AS number handling - BGP troubleshooting and monitoring - Single/multiple ISP connectivity |
| Topic 5: BGP Fundamentals | 20% | - BGP characteristics and operation - BGP peering configuration - BGP message types and formats - BGP session establishment and states |
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