RIP

1. RIP summary
RIP dose not support super net summary.

2. RIP default route
You can specific which interface should the default route sending out using "default-route originate route-map Interface".

route-map Interface
match ip address 1 //only when there is a route match access-list 10 will it create 0.0.0.0/0
set interface e0/0 //it will only send update 0.0.0.0/0 out e0/0

3. Filter routes
distribute-list 1 in e0/0

distribute-list prefix-list allow-nets in e0/0

distribute-list gateway all0w-source in e0/0 (Gateway is the ip address of the neighbor whom you receive a routing update).
The following prefix-list works with distribute-list gateway to only allow updates from 150.1.1.2.
ip prefix-list allow-source deny 150.1.1.1/32
ip prefix-list allow-source permit 150.1.1.2/32

4. Redistribute need to manually set the metric.

5. Troubleshooting tool
debug ip rip
will show you all the update sent and received.