Cisco 3750 Configuring GRE Tunnel

• Cisco 3750-A's Configuration

ip routing

!

interface Tunnel0

 ip unnumbered Vlan20

 tunnel source Vlan200

 tunnel destination 192.168.200.100

!

interface GigabitEthernet1/0/1

 switchport access vlan 200

 switchport mode access

!

interface Vlan20

 ip address 192.168.20.254 255.255.255.0

!

interface Vlan200

 ip address 192.168.200.1 255.255.255.0

!

ip route 192.168.10.0 255.255.255.0 Tunnel0

• Cisco 3750-B's Configuration

ip routing

!

interface Tunnel0

 ip unnumbered Vlan10

 tunnel source Vlan200

 tunnel destination 192.168.200.1

!

interface GigabitEthernet1/0/1

 switchport access vlan 200

 switchport mode access

!

interface Vlan10

 ip address 192.168.10.254 255.255.255.0

!

interface Vlan200

 ip address 192.168.200.100 255.255.255.0

!

ip route 192.168.20.0 255.255.255.0 Tunnel0