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You run a company that sells Virtual Worlds for gamers. The network you are using is running on OSPF and one of the areas is a NSSA. At the moment you are not sure which router is performing the translation from LSA Type 7 to Type 5 into your backbone router. Up to you to check it out!
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I believe for this example I need to use the forced translator command, correct? Also do we need to use the compatible rfc1587 command?
My IOS command doesnt have the type7 always option, so I cant actually test this. so would like to know if im write so I can make a note and move on.
Thanks
Hi,
It's not a complex lab. When you configure one area to be a NSSA you will have only one router that will do the translation from LSA type 7's in the NSSA to the backbone area. With two routers like in this topology there will be an election to determine which router will do the type 7 --> type 5 translation.
The question is who will win the election and why, so you can change it.
Good luck!
Rene
highest RID 
what's interesting is that though the advertising router maybe router A, the path selection may use router B. The IETF doco was an interesting read to suss this one.
Good job. This is one of those labs that isn't that hard but it helps to look at how OSPF really works.
I'm interested as to why the route from Kevin to the External Route does not go by way of the advertising router? Is there a short answer!
Hi George,
What exactly do you mean? We have two area border routers and only one of them will do the translation of the external type 7 LSA to the type 5 LSA. Depending on the router ID either router Tron or Quorra will do this 
Rene
Increment the router id on each ABR's , reload the ospf process and you will see in the sho ip ospf command that the Perform type-7/type-5 LSA Translation will move to the device with the highest ID.
Hi guys can someone just post short explanation if possible or link where i can read about this topic. As im confused with this one.
i have set Tron as the one who is doing the translation but the routing table on Kevin pick other router as transit. ( i have cleared all ip ospf processes but still the same)
THX guys!!!!
Here's a good article to read more about this feature:
http://www.cisco.com/en/US/tech/tk365/technologies_configuration_example09186a00801ec9ef.shtml
Nice one, always good to learn about the weird things. I guess this is still a little off - why wouldn't both routers perform the translation. Seems like if you have two routers you want them both working for you.
Hi guys i have changed the router id of tron to 222.222.222.222 and cleared ospf process, but Quorra is the router which is translating type 7 to type 5
