OSPF NSSA P-bit Explained

Lessons Discussion
17

Hi Rene,

Will the forwarding address be changed when ABR summarize the external route to other areas?

I thought Forwarding Address will be always ASBR address and Advertising router field will be changed.

But below point confused me.

To reach 5.5.5.5/32 we have to use forward address 192.168.45.5. R1 will use both R2 and R3 to reach this network:

R1#show ip route 5.5.5.5
Routing entry for 5.5.5.5/32
  Known via "ospf 1", distance 110, metric 20, type extern 2, forward metric 3
  Last update from 192.168.13.3 on FastEthernet0/1, 00:00:22 ago
  Routing Descriptor Blocks:
    192.168.13.3, from 222.222.222.222, 00:00:22 ago, via FastEthernet0/1
      Route metric is 20, traffic share count is 1
  * 192.168.12.2, from 222.222.222.222, 00:00:22 ago, via FastEthernet0/0
      Route metric is 20, traffic share count is 1

Regards,
Siji