Networking BGP Basics Cheat Sheet

Peering, prefixes, and health

Last Updated: November 21, 2025

Focus Areas

Focus
Monitor BGP session states
Validate route filters and prefixes

Commands & Queries

bgpctl show
Inspect sessions
ip route show table main
View advertised prefixes
exabgp --config bgp.conf
Simulate announcements

Summary

Healthy BGP relies on mirrored filters and monitoring.

💡 Pro Tip: Mirror filters between peers and monitor session states.
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