Please could anyone confirm these statements:

1) No AS External LSA (type 5) originate from a stub area
2) No ASBR Summary LSA (type 4) originate from router if not an ABR router
(internal router)
3) In the network statement you would use:
    router ospf 1
        network 0.0.0.0 255.255.255.255 area 10

OSPF would run on all active interface (unless "passive-interface command"
used on some interface))

Would you still use a loopback address?
    interface loopback0
        ip address 192.168.10.1
    router ospf 1
        network 192.168.100.0  0.0.255.255 area 10

Wouldn't your "network statement" advertise your loopback since it "fit"
inside the inverse mask or would you write
your network statement more restrictive:
    router ospf 1
        network 192.168.100.0  0.0.0.255 area 10

Let's say you have 15 routers inside the stub network; would this produce
uneccessary LSA's?

I am still learning the OSPF process so please be very descriptive in your
answer.

Thanks

Daniel


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