Is the customer connecting via PPPoE? That would generate a /32 route that is being advertised.
On Fri, Mar 31, 2017 at 1:27 PM, Adam Moffett <[email protected]> wrote: > Any routing marks involved? Any mangle or firewall rules which would > match this customer and not others? > > When you're saying "traceroute stops at", is that the site giving the last > reply? > > What if you specify different source IP's on your traceroute from the > NOC? Maybe tower A is missing one route, but not others. > > 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. > > > ------ Original Message ------ > From: "Justin Marshall" <[email protected]> > To: "[email protected]" <[email protected]> > Sent: 3/31/2017 12:55:43 PM > Subject: [AFMUG] Strange OSPF problem > > Hi, > > > > I have an odd situation with OSPF. > > > > There are 2 towers (Tower A and Tower B) and a NOC involved that feeds > both towers. > > Tower A is directly connected to the NOC via Mikrotik Backhaul. Tower B > is directly connected to the NOC via *Fiber.* > > Tower B is connected to Tower A via *Fiber.* > > > > When tower A is running straight off the NOC (via Mikrotik Backhaul) > everything works as it should. > > > > We are trying to make a switchover to have Tower A run off Tower B so it > will be a Fiber connection all the way to Tower A (through tower B) and > eliminate the Mikrotik Backhaul. > > > > When I change cost on the OSPF interfaces to make this happen, all > customers work as they should and following the normal path to/from the > Internet as expected. However, for one of the customers on Tower A, > traceroutes to that one customer stop at Tower A (through tower B) from the > NOC. Traceroutes towards the NOC, from the customer stops at Tower B. > > > > All customers are on the same subnet. > > > > I can directly ping the customer in question from both Tower B and Tower A > (and the traffic is taking the correct path), but not from the NOC. From > the NOC all traffic stops at Tower B > > > > The only real difference for the customer that is not working is they are > using a Sonic Wall, and the other customers have Mikrotik routers behind > the CPE's. We have tried elimating the sonc wall, and replacing it with a > laptop for testing, and the traffic flow failed in the same way. > > > > Tried all kinds of things and we are quite stumped. > > > > Anyone have any suggestions? > > > > Thanks, > > Justin > > [email protected] > > > > > >
