Manual Summary of vrouters and vpcs

1. Turn off the automatic summary function of all the above routers,
2. Some loopback ports are added to R2 to run the OSPF protocol. The router information obtained by R1 is

3. On R2
4. view the learned route entries on the R1 and R3 routes.

 

5. When the command ip summary-address is run on R1, the more detailed network address will be automatically summarized and advertised to the route R3 on R1.

Now, check the route entries learned by the R3 router and those learned by the R3 router.

The comparison between the two is obvious.
Summary: for automatic summarization, even on a small Internet, route entries learned by the company will be halved. In large networks, the reduction of the memory required by the route selection table and the storage route table makes sense.
This article is from cisco"