Is a scenario possible, where split horizon with poisoned reverse can’t prevent routing circles? E.g., if router A does announce all routes that route over B to B as infinity, B will never route over A to nodes that A routes to over B.
But is there a scenario, where a failing link causes a routing circle, despite all nodes having using split horizon with poisoned reverse? Maybe with multiple routers involved? Or does this always prevent routing circles? Maybe this is trivial, but I couldn’t think of an example right now. Thanks in advance!