SW-1:

interface Ethernet0/0
 switchport trunk allowed vlan 10,20
 switchport trunk encapsulation dot1q
 switchport mode trunk
 no routing dynamic
!
interface Ethernet0/1
 switchport access vlan 10
!
interface Ethernet0/2
 switchport access vlan 20



SW-2:


interface Ethernet0/0
 switchport trunk allowed vlan 10,20
 switchport trunk encapsulation dot1q
 switchport mode trunk
!
interface Ethernet0/1
 switchport access vlan 10
!
interface Ethernet0/2
 switchport access vlan 20



Core-WS:

license grace-period

feature interface-vlan

ip route 0.0.0.0/0 192.168.100.1


vlan 1,10,20
vlan 10
  name STUDENT
vlan 20
  name STAFF

interface Vlan1

interface Vlan10
  no shutdown
  ip address 192.168.10.1/24

interface Vlan20
  no shutdown
  ip address 192.168.20.1/24

interface Ethernet2/1
  switchport
  switchport mode trunk
  no shutdown

interface Ethernet2/2
  switchport
  switchport mode trunk
  no shutdown

interface Ethernet2/3
  no switchport
  mac-address 0000.0000.002f
  ip address 192.168.100.2/30
  no shutdown




BGP-Configuration
===================================

Border-r1:

interface GigabitEthernet1/0
 ip address 100.100.10.2 255.255.255.252
 negotiation auto
!
interface GigabitEthernet2/0
 ip address 192.168.100.1 255.255.255.0
 negotiation auto
!
interface GigabitEthernet3/0
 ip address 200.200.20.2 255.255.255.252
 negotiation auto

router bgp 100
 bgp log-neighbor-changes
 network 192.168.0.0 mask 255.255.0.0
 neighbor 100.100.10.1 remote-as 200
 neighbor 200.200.20.1 remote-as 300
!


ip route 192.168.0.0 255.255.0.0 192.168.100.2


ISP-Router
===============================================

interface Loopback0
 ip address 8.8.8.8 255.255.255.0

interface GigabitEthernet1/0
 ip address 200.200.20.1 255.255.255.252
 negotiation auto


router bgp 300
 bgp log-neighbor-changes
 neighbor 200.200.20.2 remote-as 100
 neighbor 200.200.20.2 default-originate



ip route 0.0.0.0 0.0.0.0 Null0


NREN-ROUTER
===================================

interface GigabitEthernet1/0
 ip address 100.100.10.1 255.255.255.252
 negotiation auto

router bgp 200
 bgp log-neighbor-changes
 network 172.16.0.0
 neighbor 100.100.10.2 remote-as 100


ip route 172.16.0.0 255.255.0.0 Null0