S1#conf t
S1(config)#vlan 51
S1(config-vlan)#name ENG
S1(config-vlan)#vlan 52
S1(config-vlan)#name MGMT
S1(config)#int gi0/0
S1(config-if)#switchport mode access
S1(config-if)#switchport access vlan 51
S1(config-if)#spanning-tree portfast
S1(config)#int gi0/1
S1(config-if)#switchport mode access
S1(config-if)#switchport access vlan 52
S1(config-if)#spanning-tree portfast
S1#show vlan
VLAN Name Status Ports ---- -------------------------------- --------- ------------------------------- 1 default active Gi0/2, Gi0/3, Gi1/0, Gi1/1 Gi1/2, Gi1/3 51 ENG active Gi0/0 52 MGMT active Gi0/1
R1
R1(config)#int fastEthernet 0/0
R1(config-if)#no shutdown
R1(config)#interface fastEthernet 0/0.51
R1(config-subif)#encapsulation dot1Q 51
R1(config-subif)#ip address 10.1.51.1 255.255.255.0
R1(config)#interface fastEthernet 0/0.52
R1(config-subif)#encapsulation dot1Q 52
R1(config-subif)#ip address 10.1.52.1 255.255.255.0
R1(config-if)#do show ip int brief
Interface IP-Address OK? Method Status Protocol
FastEthernet0/0 unassigned YES unset up up
FastEthernet0/0.51 10.1.51.1 YES manual up up
FastEthernet0/0.52 10.1.52.1 YES manual up up
Serial0/0 unassigned YES unset administratively down down
FastEthernet0/1 unassigned YES unset administratively down down
S1(config)#interface gigabitEthernet 1/3
S1(config-if)#switchport trunk encapsulation dot1q
S1(config-if)#switchport mode trunk
S1(config-if)#switchport nonegotiate
gns3@PC1:~$ sudo ifconfig eth0 10.1.51.50 netmask 255.255.255.0
gns3@PC1:~$ sudo route add default gw 10.1.51.1
gns3@PC2:~$ sudo ifconfig eth0 10.1.52.50 netmask 255.255.255.0
gns3@PC2:~$ sudo route add default gw 10.1.52.1
Layer 3 switching
S1# show vlan
VLAN Name Status Ports
---- -------------------------------- --------- -------------------------------
1 default active Gi0/2, Gi0/3, Gi1/0, Gi1/1
Gi1/2, Gi1/3
51 ENG active Gi0/0
52 MGMT active Gi0/1
R1#show ip route
Codes: C - connected, S - static, R - RIP, M - mobile, B - BGP
D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
E1 - OSPF external type 1, E2 - OSPF external type 2
i - IS-IS, su - IS-IS summary, L1 - IS-IS level-1, L2 - IS-IS level-2
ia - IS-IS inter area, * - candidate default, U - per-user static route
o - ODR, P - periodic downloaded static route
Gateway of last resort is not set
10.0.0.0/24 is subnetted, 2 subnets
C 10.1.51.0 is directly connected, FastEthernet0/0.51
C 10.1.52.0 is directly connected, FastEthernet0/0.52
gns3@PC2:~$ ping 10.1.51.50
PING 10.1.51.50 (10.1.51.50): 56 data bytes
64 bytes from 10.1.51.50: seq=0 ttl=63 time=46.518 ms
64 bytes from 10.1.51.50: seq=1 ttl=63 time=41.367 ms
R1#show arp Protocol Address Age (min) Hardware Addr Type Interface Internet 10.1.51.50 1 00cf.7122.8900 ARPA FastEthernet0/0.51 Internet 10.1.52.50 1 00cf.7112.fd00 ARPA FastEthernet0/0.52 Internet 10.1.51.1 - c201.09ba.0000 ARPA FastEthernet0/0.51 Internet 10.1.52.1 - c201.09ba.0000 ARPA FastEthernet0/0.52
gns3@PC2:~$ traceroute -d 10.1.51.50 traceroute to 10.1.51.50 (10.1.51.50), 30 hops max, 38 byte packets 1 10.1.52.1 (10.1.52.1) 21.114 ms 18.455 ms 15.752 ms 2 10.1.51.50 (10.1.51.50) 30.915 ms 17.952 ms 26.543 ms 1) Turn on routing to convert to L3 SW -- ip routing -- (IMPORTANT!!!!) S1(config)#ip routing S1(config)#interface vlan 51 S1(config-if)#ip address 10.1.51.1 255.255.255.0 S1(config-if)#description ENG ROUTED INTERFACE S1(config-if)#int vlan 52 S1(config-if)#ip address 10.1.52.1 255.255.255.0 S1(config-if)#description MGMT VLAN S1#show ip int brief Interface IP-Address OK? Method Status Protocol Vlan51 10.1.51.1 YES manual up up Vlan52 10.1.52.1 YES manual up up S1#show ip route Codes: L - local, C - connected, S - static, R - RIP, M - mobile, B - BGP D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2 E1 - OSPF external type 1, E2 - OSPF external type 2 i - IS-IS, su - IS-IS summary, L1 - IS-IS level-1, L2 - IS-IS level-2 ia - IS-IS inter area, * - candidate default, U - per-user static route o - ODR, P - periodic downloaded static route, H - NHRP, l - LISP a - application route + - replicated route, % - next hop override Gateway of last resort is not set 10.0.0.0/8 is variably subnetted, 4 subnets, 2 masks C 10.1.51.0/24 is directly connected, Vlan51 L 10.1.51.1/32 is directly connected, Vlan51 C 10.1.52.0/24 is directly connected, Vlan52 L 10.1.52.1/32 is directly connected, Vlan52 gns3@PC1:~$ ping 10.1.52.50 PING 10.1.52.50 (10.1.52.50): 56 data bytes 64 bytes from 10.1.52.50: seq=0 ttl=63 time=34.760 ms 64 bytes from 10.1.52.50: seq=1 ttl=63 time=17.715 ms 54