Follow below attached flow chart or steps to troubleshoot NIC issues.
1. Start NIC Troubleshooting
2. Physical Layer Check
2.1. Check if interface is up
→ If not up, continue to next step
2.2. Is SFP present?
Yes → Check SFP diagnostics
No → Back-to-back test between VOS interfaces
2.3. Does back-to-back test succeed?
No → Change network cable
Yes →
- Check configuration on peer device
- Insert SFP and cable firmly
- Reboot VOS
2.4. Is interface up now?
No → Continue troubleshooting physical layer issues
Yes → Proceed to next stage
3. Network Layer Check
3.1. Ping next hop
→ Is ARP resolved?
Yes → Problem Resolved
No → Run tcpdump on VOS
3.2. Are ARP requests and responses seen?
Yes → Is peer device responding?
- Yes → Are packets received by peer or responses not reaching VOS?
- Yes → Look at VOS packet drop counts or enable packet traceNo → Is VOS sending ARP or ICMP packets?
- No → Check IP address configuration
- Yes → Check on peer device
4. VOS Bypass Test (if needed)
4.1. Stop VOS services
4.2. Enable same IP in native Linux
4.3. Ping next hop from native Linux
→ Does ping work on native Linux?
Yes → Reach out to Versa Support
No → Check on peer device or contact device vendor
✅ Problem Resolved
Versa recommends using Versa qualified SFPs - https://support.versa-networks.com/support/solutions/articles/23000025677-list-of-validated-and-supported-small-form-factor-pluggable-sfp-from-finisar
Please refer this article for ARP issues - https://support.versa-networks.com/support/solutions/articles/23000025588-not-responding-to-arp-requests
