The use of Leak-map in the combination of multiple nodes in the network.

Required Configuration
The following are the required devices for this lab:
1) Two Cisco routers with one serial port;
2) Cisco IOS 10.0 or later;
4) a pc that runs the terminal simulation program;
5) a Cisco DTE/DCE crossover cable;
6) a Cisco flat cable is used to access the Console port of the router.

3.4.1. Tutorial Purpose
Master how to use the leak-map leak part of the precise routing. Specific requirements: R1 and R6 run the OSPF protocol. R1 summarizes the routes when it passes the routing to R6, A route entry of 192.168.1.0, 192.168.2.0, and 192.168.3.0 is summarized as 192.168.0.0/22, but an exact route entry of 192.168.1.0/24 is to be separately advertised to R6 on R1.
3.4.2. Experiment Topology
 

3.4.3. Experiment Configuration
1. Router R1
Interface Loopback1
Ip address 192.168.1.1 255.255.255.0
!
Interface Loopback2
Ip address 192.168.2.1 255.255.255.0
!
Interface Loopback3
Ip address 192.168.3.1 255.255.255.0
!
Interface Serial0/1
Ip address 16.16.16.1 255.255.255.0
Ip summary-address VPN 90 192.168.0.0 255.255.252.0 5 leak-map myleakmap
!
Router VPN 90
Network 16.16.16.0 0.0.255
Network 192.168.1.0
Network 192.168.2.0
Network 192.168.3.0
Auto-summary
!
Ip access-list standard myleakmapacl
Permit 192.168.1.0 0.0.255
!
Route-map myleakmap permit 10
Match ip address myleakmapacl
!
2. Router R6
Interface Serial0/1
Ip address 16.16.16.6 255.255.255.0
Serial restart-delay 0
Clock rate 64000
!
Router VPN 90
Network 16.16.16.0 0.0.255
No auto-summary
!
Dcd
3.4.4. Experiment verification
When myleakmap is not configured
R6 # show ip route
Gateway of last resort is not set

16.0.0.0/24 is subnetted, 1 subnets
C 16.16.16.0 is directly connected, Serial0/1
D 192.168.0.0/22 [90/2297856] via 16.16.16.1, 00:01:26, Serial0/1
After configuring myleakmap
R6 # show ip route
Gateway of last resort is not set

16.0.0.0/24 is subnetted, 1 subnets
C 16.16.16.0 is directly connected, Serial0/1
D 192.168.1.0/24 [90/2297856] via 16.16.16.1, 00:00:04, Serial0/1
D 192.168.0.0/22 [90/2297856] via 16.16.16.1, 00:01:35, Serial0/1
As you can see, the exact route of 192.168.1.0/24 is displayed on R6.