Good Day.
My Clients Routers and Distribution routers are experiencing no routes to host (more or less 10 seconds) randomly that are pointing or gateway to our BR01 (See attached topology ). It is not happening at the same time to all connected (logical or physical) clients routers and distribution routers. This no route to host issue happened to each routers for 4 to 5 times a day. I tried to check the route debug logs, and the default routes 0.0.0.0/0 was withdrawn in the routes then after more or less 10 seconds the default routes is active again. Please note that the point to point ping does not experienced RTO but the default route encountered reset or withdrawn at clients routers. Take note that no error logs between clients and border router. Hoping someone can help me this issue. Please take note the downtime/no route to host only last for more or less than 10 seconds.
Here is below the route logs capture from the client router.
May/21/2021 11:37:23 route,debug,calc Begin calculation
May/21/2021 11:37:23 route,debug,calc End calculation
May/21/2021 11:37:23 route,debug Begin redistribution
May/21/2021 11:37:23 route,debug Accept withdraw 0.0.0.0/0
May/21/2021 11:37:23 route,debug Commit prefix 0.0.0.0/0
May/21/2021 11:37:23 route,debug End redistribution
May/21/2021 11:37:52 route,debug,calc Begin calculation
May/21/2021 11:37:52 route,debug,calc Select route
May/21/2021 11:37:52 route,debug,calc dst-address=0.0.0.0/0
May/21/2021 11:37:52 route,debug,calc attributes
May/21/2021 11:37:52 route,debug,calc protocol=STATIC
May/21/2021 11:37:52 route,debug,calc distance=1
May/21/2021 11:37:52 route,debug,calc scope=30
May/21/2021 11:37:52 route,debug,calc target-scope=10
May/21/2021 11:37:52 route,debug,calc preferred-source=14.XX.XX.178
May/21/2021 11:37:52 route,debug,calc next-hop= address=14.XX.XX.177
May/21/2021 11:37:52 route,debug,calc need-gateway-check=2
May/21/2021 11:37:52 route,debug,calc comment=NEW Default Route
May/21/2021 11:37:52 route,debug,calc origin-type=STATIC
May/21/2021 11:37:52 route,debug,calc End calculation
May/21/2021 11:37:52 route,debug Begin redistribution
May/21/2021 11:37:52 route,debug Accept add 0.0.0.0/0
May/21/2021 11:37:52 route,debug Commit prefix 0.0.0.0/0
May/21/2021 11:37:52 route,debug End redistribution
Thank you.