1. OSPF cost
1M=1024k
1Mbps=1024kbps
kbit/s=kbps
All this cost value = 100000 / actual bandwidth
2. OSPF authentication
Authentication Configuration
3. Experiment 1
3.1 Suppressing an Interface
Inhibition of the interface is used to connect pc
3.2 interface authentication and regional accreditation
4. Experiment 2
5. Experiment 3
Serial actual bandwidth is 64kbps
GE is 1000Mbps
If the case is not closed interface, you want to take the serial data on the modification of the overhead GE interfaces, making it larger
Modification in the inlet direction, that is, the direction of the loop
6. Experiment 4
