One other thing....I had a couple of anomalies go away when I switched
OSPF interfaces from broadcast to point-to-point mode. I thought the
only difference was the OSFP messages are sent unicast, but a few goofy
things stopped happening when I did that.
That’s something I hadn’t thought to try.
Would I need to do it on all interfaces involved? or just from Tower B
to Tower A? (that’s where the issue seems to be, even though I can
still reach the customer from Tower B, just not the NOC)
I started doing it just between sites that had problems. Lately I've
been doing it everywhere. Technically if it is a point to point link,
then running OSPF in point to point mode would be the correct way
anyway. I think the problem that prompted me to try this waswas a
router switching to using a higher cost path mysteriously and it would
switch back to the lower cost path if I "kicked" it (reboot, flap
interface, or similar).
Whenever I've had a problem like yours, it always ended up being that
somebody wasn't receiving the route, or was filtering the route, or not
installing the route. There always ended up being a reason.....though
sometimes I beat my head against the wall for awhile before I found it.
