Route redistribution, aggregation, filtering methods and difficulty summary

Regardless of the actual application or CCIE experiment, route redistribution and route filtering have always been a difficult point. Here are some points to note:
First, the route filtering method: (three)
1, distribute-list
2, route-map
3, summary
The following are simple examples, only allow 10.10.0.0/16 entries to enter the routing table.
1, distribute-list
Ip prefix-list cracker permit 10.10.0.0/16
Router eigrp 10
   Distribute-list prefix-list cracker in s0/0
2, route-map
Ip prefix-list cracker permit 10.10.0.0/16
Route-map cracker permit 10
  Match ip address prefix-list cracker
Router ospf 10
  Redis eigrp 10 metric 100 subnets route-map cracker
3, summary
Sometimes we can summarize the route with summary, and because of the instinct to suppress the fine-grained route entry, we are equivalent to adding another filter statement.
Int s0/0
  Ip summary-address eigrp 10 10.10.0.0 255.255.0.0
Routes sent from s0/0 will be filtered at the same time as the summary.
Second, route filtering
Route filtering is only valid for the Distance-vector routing protocol. Link state protocols such as OSPF ignore route filtering, unless of course we do it in the routing process.
This is why we often do not see the existence of the route-filtering statement distribute-list when other routing protocols redistribute to OSPF. But this does not mean that the method of using route-map is not possible.
Below we discuss in two cases
1. EIGRP RIP These two routing protocols can be done in the in out direction, without too much consideration, directly on the distribute-list.
Example: Disable 10.10.0.0/16 summary route to enter EIGRP/RIP
Router rip
  Distribute-list prefix-list cracker in s0/0
Ip prefix-list cracker deny 10.10.0.0/16
Ip prefix-list cracker permit 0.0.0.0/0 le 32
Router eigrp 10
  Distribute-list prefix-list cracker in s0/0
2. OSPF route filtering
Example: Disabling the 10.10.0.0/16 summary route into OSPF
Router os 10
  Redis eigrp 10 metric 100 subnets route-map cracker
Ip prefix-list cracker permit 10.10.0.0/16
Route-map 22817747 deny 10
  Match ip addr prefix-list cracker
Route-map 22817747 permit 20

If you want to passed the exam successfully. you can review with ccnp 300 206 dumps from evedumps.com  that will help passed exam at first attempt. I will also recommend the cisco 400 251 dumps too.