Port Security Configuration

S1(Config)#int fas0/18
S1(Config-if)#switchport mode acess
S1(Config-if)#switchport port-security

Fa0/19

S1(Config)#int fas0/19
S1(Config-if)#switchport mode acess
S1(Config-if)#switchport port-security
S1(Config-if)#switch port-security maximum 10
S1(Config-if)#switchport port-security mac-address sticky

Verfying

S1#show port-security int fa0/18

Configuration NTP(Network time protocol)

R1(Config)#ntp master 1

R2(Config)#ntp server 10.1.1.1