Traffic Question

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Highlighted
L1 Bithead

Traffic Question

Hello everyone,

 

 I am seeing a strange issue that I haven't come across before and I'm not sure how to troubleshoot it.  To make it as simple as I can, sometimes traffic going to a specific destination isn't using the defined OSPF route.  So for example, the destination is 10.50.0.0/16 and OSPF is enabled on the virtual router using a specific tunnel... when I do a route lookup, it's there and I see successful traffic from the same source zone, using the same application and port to the desired destination using the proper OSPF tunnel.   When I do a test routing fib-lookup to that range, it shows it should use that tunnel.  However, sometimes it doesn't use the tunnel and traffic ends up in the wrong zone and is denied.  I see no static route to this address, and I can't find any PBF involved.  

 

  Does anyone have any ideas what might be impacting this routing but only on occasion? 

Highlighted

Hi

Maybe tunnel is flapping, routes are flushed and sessions are established to different gateway.

Have you try blackhole?

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