350-601 Network Practice Question
An engineer is troubleshooting a BGP EVPN session between a leaf and a spine. The 'show bgp l2vpn evpn summary' output shows the peer state as 'Active'. What does this indicate?
⚠ Common exam trap
A common mix-up: candidates confuse 'Active' with 'Connect' or think it means the session is actively exchanging routes, when in fact it indicates a TCP connection failure that must be resolved before BGP can proceed.
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
✓
The TCP connection is not established.
In BGP EVPN, the 'Active' state indicates that the BGP speaker is actively trying to establish a TCP connection with the peer but has not yet completed the three-way handshake. This means the TCP session is not established, which is a prerequisite for BGP session establishment. The peer remains in 'Active' until the TCP connection is successfully formed.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
The session is in the process of being established.
Why it's wrong here
That describes the Connect state.
- ✗
The session is up and exchanging prefixes.
Why it's wrong here
That would be the Established state.
- ✗
There is a configuration mismatch.
Why it's wrong here
Configuration mismatch may cause Idle state.
- ✓
The TCP connection is not established.
Why this is correct
Active means BGP is trying to establish a TCP connection.
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JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
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