ospf infinite cost of some route help

RouterOS Forwarding Protocols
1

hi guys,
i have a problem about some route installing in ospf as infinite cost.

to let you help me much better i’m attaching the network architecture.

all link are point-to-point ospf and are /30 network.

pppoe server redistribute with internet2 all pppoe dynamic interface installed as ext1(all ok) but when i let firewall2 join ospf area 1 all pppoe routes are seen on ospf route as infinite.the same thing happened on the other pppoe and internet1.

the strange thing is that all 2 cisco 3550 see the ospf route correctly…

let me know if i miss something important.

BR
datacenters.jpeg

2

Infinite cost can be used a s a way to clear out routes. Have a look at the LSAs and see who is originating the infinite cost entries.

3

thanks for reply, but i have not set the infinite cost..then i cannot understand why are installed as infinite, infact the same route is infinite on ccr and normal(cost 110) on cisco.
what i want to understand: is normal to have this inifinite route or is an error on architecture or some other bugs?

Thanks again
BR

4

OSPF itself can generate infinite cost entries - some transient and some permanent. Hard to say which you are seeing without more config details.

5

what detail you need? i can send it to you if you have the time to help me.

Thanks a lot