Exploring the BGP Neighbor CONNECT State
Sakar commented on a blog post about Cisco IOS/XE's BGP CONNECT state, prompting a scenario test to verify TCP SYN behavior between routers.
MAIN POINTS
- Sakar's comment suggests Cisco IOS/XE enters CONNECT state during incoming BGP session openings.
- Verification required a scenario with one router sending TCP SYN requests without communication.
- The test aimed to observe behavior without routers reaching the OPEN state.
- The scenario setup was crucial to understanding the CONNECT state behavior.
TAKEAWAYS
- Understanding BGP states is essential for network troubleshooting and configuration.
- Testing scenarios help verify claims about network protocol behaviors.
- Router communication dynamics can affect BGP session states.
- Real-world testing can validate or refute theoretical claims about network equipment behavior.