Intermittent Network Disconnects Due to MTU Mismatch Between Nodes

Intermittent network disconnects occurred due to MTU mismatches between different nodes in the cluster.

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What Happened

Network packets were being dropped or fragmented between nodes with different MTU settings, causing network instability.

Diagnosis Steps

1Used ping with large payloads to identify packet loss.
2Discovered that the MTU was mismatched between the nodes and the network interface.

Root Cause

MTU mismatch between nodes in the cluster.

Fix/Workaround

• Reconfigured the MTU settings on all nodes to match the network interface requirements.
• Rebooted nodes to apply the new MTU settings.

Lessons Learned

Consistent MTU settings across all nodes are crucial for stable networking.

How to Avoid