Switch(config)#hostname ALS1
ALS1(config)#interface fastEthernet 0/5
ALS1(config-if)#desc
ALS1(config-if)#description R3
ALS1(config-if)#interface fastEthernet 0/6
ALS1(config-if)#description PC-C
ALS1(config-if)#interface fastEthernet 0/7
ALS1(config-if)#description DLS1
ALS1(config-if)#interface fastEthernet 0/8
ALS1(config-if)#description DLS1
ALS1(config-if)#interface fastEthernet 0/9
ALS1(config-if)#description DLS2
ALS1(config-if)#interface fastEthernet 0/10
ALS1(config-if)#description DLS2
ALS1(config-if)#interface fastEthernet 0/11
ALS1(config-if)#description ALS2
ALS1(config-if)#interface fastEthernet 0/12
ALS1(config-if)#description ALS2
ALS1(config-if)#exit
ALS1(config)#line console 0
ALS1(config-line)#logging synchronous
ALS1(config-line)#exec-timeout 0 0


Switch(config)#hostname ALS2
ALS2(config)#interface FastEthernet 0/5
ALS2(config-if)#description R4
ALS2(config)#interface FastEthernet 0/6
ALS2(config-if)#description PC-D
ALS2(config)#interface FastEthernet 0/7
ALS2(config-if)#description DLS2
ALS2(config)#interface FastEthernet 0/8
ALS2(config-if)#description DLS2
ALS2(config)#interface FastEthernet 0/9
ALS2(config-if)#description DLS1
ALS2(config)#interface FastEthernet 0/10
ALS2(config-if)#description DLS1
ALS2(config)#interface FastEthernet 0/11
ALS2(config-if)#description ALS1
ALS2(config)#interface FastEthernet 0/12
ALS2(config-if)#description ALS1
ALS2(config-if)#exit
ALS2(config)#line console 0
ALS2(config-line)#logging synchronous
ALS2(config-line)#exec-timeout 0 0



Switch(config)#hostname DLS1
DLS1(config)#int gigabitEthernet 1/0/5
DLS1(config-if)#description R1
DLS1(config-if)#int gigabitEthernet 1/0/6
DLS1(config-if)#description PC-A
DLS1(config-if)#int gigabitEthernet 1/0/7
DLS1(config-if)#description ALS1
DLS1(config-if)#int gigabitEthernet 1/0/8
DLS1(config-if)#description ALS1
DLS1(config-if)#int gigabitEthernet 1/0/9
DLS1(config-if)#description ALS2
DLS1(config-if)#int gigabitEthernet 1/0/10
DLS1(config-if)#description ALS2
DLS1(config-if)#int gigabitEthernet 1/0/11
DLS1(config-if)#description DLS2
DLS1(config-if)#int gigabitEthernet 1/0/12
DLS1(config-if)#description DLS2
DLS1(config-if)#exit
DLS1(config)#line console 0
DLS1(config-line)#logging synchronous
DLS1(config-line)#exec-timeout 0 0

Switch(config)#hostname DLS2
DLS2(config)#interface gigabitEthernet 1/0/5
DLS2(config-if)#description R2
DLS2(config-if)#interface gigabitEthernet 1/0/6
DLS2(config-if)#description PC_B
DLS2(config-if)#interface gigabitEthernet 1/0/7
DLS2(config-if)#description ALS2
DLS2(config-if)#interface gigabitEthernet 1/0/8
DLS2(config-if)#description ALS2
DLS2(config-if)#interface gigabitEthernet 1/0/9
DLS2(config-if)#description ALS1
DLS2(config-if)#interface gigabitEthernet 1/0/10
DLS2(config-if)#description ALS1
DLS2(config-if)#interface gigabitEthernet 1/0/11
DLS2(config-if)#description DLS1
DLS2(config-if)#interface gigabitEthernet 1/0/12
DLS2(config-if)#description DLS1
DLS2(config-if)#exit
DLS2(config)#line console 0
DLS2(config-line)#logging synchronous
DLS2(config-line)#exec-timeout 0 0