4.1 - Aggregate-address
I've looked through the archives, and basically, it seems like the rationale given for adding the
aggregate-address 22.214.171.124 255.255.0.0 summary-only
statement into R3 is to make sure that it's sent out to get full reachability from the backbone routers.
I understand in theory that we need to have full reachability in the lab in order to complete it, however, what I'm not clear about is why we wouldn't therefore have a similar aggregate for our Loopback address space sent out, or why this wouldn't be done by pushing an IGP into BGP somewhere.
I guess maybe I'm still struggling with keeping in mind that I will need to ensure full reachability once BGP is done to the backbone routers, and need to run more verifications once my BGP sections are done.
If we're not otherwise prevented from doing so, is it probably a good idea to simply shove in an aggregate somewhere in my BGP so that I can make sure full reachability exists to the backbone(s)?
Thanks in advance,