I have three sites running EIGRP in a ring topology. Sites 1 and 2 have been up and running for years, we added site 3 recently.
We've run into an issue where every so often the 6509 in site 3 basically drops all routes for about 6 minutes. It un-neighbors and all traffic is dropped during that time. This includes most traffic for directly connected routes (though for some reason, there seems to be 1 or two subnets that can continue to function).
I'm at a loss for what to look for, at Site 1 and 2 I can see the EIGRP events where site 3 neighbors again after the
issue occurs. But everything looks clean within 6509 and I can't seem to find anything wrong.
Any assistance or advice would be much appreciated! Thank you in advance.