How To Fix RT601 - &1 &3 > &2 &3 (15 Min.) Collisions in LAN exceeds threshold

SAP Error Message - Details

• Message type: E = Error

• Message class: RT - Monitoring infrastructure MSG and alert texts

• Message number: 601

• Message text: &1 &3 > &2 &3 (15 Min.) Collisions in LAN exceeds threshold

What causes this issue?

The threshold value for collisions in the LAN has been exceeded. A
collision occurs when two stations try to transport a package at the
same time in the same channel, which leads to the destruction of both
data packets - they must therefore both be sent again.
INCLUDE BC_MONI_LAN OBJECT DOKU ID TX LANGUAGE EN
Collisions per second is omitted for Token Ring Architecture.
For more detailed information about the LAN, select the node and choose
<LS>Start Analysis Method</>.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message RT601 - &1 &3 > &2 &3 (15 Min.) Collisions in LAN exceeds threshold ?

  The SAP error message RT601 indicates that the number of collisions in the Local Area Network (LAN) has exceeded a predefined threshold. This can lead to performance issues and connectivity problems for users accessing SAP systems. Here’s a breakdown of the cause, potential solutions, and related information for this error:
  Cause:
  
  Network Congestion: High traffic on the network can lead to increased collisions, especially in environments using older Ethernet technologies (like 10Base-T).
  Faulty Network Hardware: Malfunctioning network devices (like switches, routers, or network interface cards) can cause excessive collisions.
  Improper Network Configuration: Misconfigured network settings, such as duplex mismatches (half-duplex vs. full-duplex), can lead to collisions.
  Cable Issues: Damaged or poor-quality network cables can also contribute to increased collision rates.
  High Number of Devices: A large number of devices on the same network segment can increase the likelihood of collisions.
  
  Solutions:
  
  Network Analysis: Use network monitoring tools to analyze traffic and identify congestion points. Tools like Wireshark can help diagnose network issues.
  Upgrade Network Hardware: If using older Ethernet technology, consider upgrading to a more modern standard (like Gigabit Ethernet) that reduces collision rates.
  Check Network Configuration: Ensure that all devices on the network are configured correctly, particularly regarding duplex settings. All devices should ideally be set to full-duplex.
  Replace Faulty Hardware: Test and replace any faulty network devices or cables that may be contributing to the problem.
  Segment the Network: If possible, segment the network to reduce the number of devices on a single collision domain. This can be done using switches instead of hubs.
  Increase Collision Threshold: As a temporary measure, you can increase the collision threshold in SAP settings, but this should not be a long-term solution.
  
  Related Information:
  
  SAP Notes: Check SAP Notes related to RT601 for any specific patches or updates that may address this issue.
  Network Standards: Familiarize yourself with Ethernet standards and best practices for network design to minimize collisions.
  Performance Monitoring: Regularly monitor network performance to catch issues before they escalate.
  Documentation: Keep documentation of network configurations and changes to help troubleshoot future issues.
  
  By addressing the underlying causes and implementing the suggested solutions, you can reduce the occurrence of the RT601 error and improve overall network performance for SAP applications.