On Thu, May 2, 2024 at 2:23 PM Barry Bahrami via 44net 44net@mailman.ampr.org wrote:
This is common to prevent flapping interfaces from causing problems with the routing table through constant updates. Although an hour is a bit high. I wonder if there is a typo in the config. Just a thought
That's reasonable. I wonder how it's implemented? As far as I know, creation or tear-down of an IPENCAP tunnel does not, by itself, generate any traffic: an interface could conceivably flap and nothing on the distant end would notice. I suppose if the interface flaps, an upstream router could send an ICMP host unreachable message to the UCSD router for anything being sent through the tunnel regularly? I could see that triggering some kind of quenching logic, though an hour-ish timeout seems excessive.
- Dan C.