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What techniques detect asymmetric routing paths in multi-WAN networks?
Asked on Oct 24, 2025
Answer
Detecting asymmetric routing paths in multi-WAN networks involves identifying situations where packets take different paths to and from a destination, which can lead to issues such as packet loss or latency. Techniques include using network monitoring tools, analyzing routing tables, and employing traceroute utilities to visualize the path discrepancies.
- Use network monitoring tools like Wireshark or SolarWinds to capture and analyze packet flows for asymmetry.
- Examine routing tables on routers and firewalls to identify different routes for incoming and outgoing traffic.
- Utilize traceroute or MTR (My Traceroute) to map the path taken by packets in both directions and spot inconsistencies.
Additional Comment:
- Asymmetric routing can cause stateful firewalls to drop packets if return paths are not anticipated.
- Ensure consistent routing policies across all WAN links to minimize asymmetry.
- Consider using policy-based routing or SD-WAN solutions to manage path selection more effectively.
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