Cisco0:
Gi0/1 up up uplink
Gi0/2 up up dpi_in
Gi0/3 up up dpi_out
Gi0/4 up up downlink
interface GigabitEthernet0/1
description uplink
switchport trunk encapsulation dot1q
switchport trunk allowed vlan 40,48
switchport mode trunk
spanning-tree portfast
spanning-tree bpdufilter enable
spanning-tree bpduguard enable
interface GigabitEthernet0/2
description dpi_in
switchport trunk encapsulation dot1q
switchport trunk allowed vlan 40,48
switchport mode trunk
spanning-tree portfast
spanning-tree bpdufilter enable
spanning-tree bpduguard enable
interface GigabitEthernet0/3
description dpi_out
switchport access vlan 111
switchport mode dot1q-tunnel
no cdp enable
interface GigabitEthernet0/4
description downlink
switchport trunk encapsulation dot1q
switchport trunk allowed vlan 111
switchport mode trunk
spanning-tree portfast
spanning-tree bpdufilter enable
spanning-tree bpduguard enable
int 2 and 3 — jumper
Cisco1:
Gi0/1 up up uplink
Gi0/2 up up downlink
interface GigabitEthernet0/1
description uplink
switchport trunk encapsulation dot1q
switchport trunk allowed vlan 111
switchport mode trunk
spanning-tree portfast
spanning-tree bpdufilter enable
spanning-tree bpduguard enable
interface GigabitEthernet0/2
description downlink
switchport access vlan 111
switchport mode dot1q-tunnel
no cdp enable
spanning-tree portfast
spanning-tree bpdufilter enable
spanning-tree bpduguard enable
eltex0:
interface gigabitethernet 1/0/1
switchport mode trunk
switchport trunk allowed vlan add 111
description uplink
spanning-tree portfast auto
spanning-tree bpdu filtering
spanning-tree bpduguard enable
interface gigabitethernet 1/0/2
switchport mode customer
switchport customer vlan 111
description downlink
spanning-tree portfast auto
spanning-tree bpdu filtering
spanning-tree bpduguard enable