I have Area 0 and Area 1, Area 1 is configured as NSSA and there is this router R3 in this area that works as ASBR and redistributing/injecting some external routes from some other routing domain into Area 1, I know Type 7 LSA allows injection of external routes through Not-so-Stubby-Areas (NSSA), and I know since type 5 LSA are not allowed inside any stub area, Type 7 LSA is used, to trick OSPF. Type 7 LSA is generated by NSSA ASBR and is translated into type 5 LSA as it leaves the area by NSSA ABR, which is then propagated throughout the network as type 5 LSA, so please do not state the obvious.
The question is:
Is it possible to summarize routes that come from other routing domain through NSSA ASBR in mentioned scenario?
For example I got these static routes on my NSSA ASBR and I want to summarize them:
192.168.1.0/24 192.168.2.0/24 192.168.3.0/24 192.168.4.0/24 192.168.5.0/24 192.168.6.0/24
I want to summarize them to one single route like
192.168.0.0/21, and then inject them to ospf routing domain, through NSSA ASBR, is that possible to do on a Cisco router?
I've already tried summary-address command on NSSA ASBR, but it didn't work.