Arista EOS MPLS P/PE-router Behavior
While testing IPv4 ECMP in Arista cEOS containers with an MPLS/anycast scenario, MPLS labels were missing in ICMP replies, prompting an investigation into PE/P-router behavior using a BGP-free core.
MAIN POINTS
- IPv4 ECMP was tested in Arista cEOS containers with an MPLS/anycast scenario.
- MPLS labels were absent in ICMP replies despite Arista EOS's capability to generate them.
- A simple BGP-free core was built to investigate the issue further.
- The investigation focused on understanding PE/P-router behavior.
TAKEAWAYS
- MPLS labels are crucial for proper ICMP reply functionality in this scenario.
- Arista EOS has the capability to generate MPLS labels, but issues can still arise.
- A BGP-free core can aid in isolating and understanding network behavior.
- Thorough testing and investigation are essential when unexpected network behavior occurs.