Configuration Steps

Step 1: Configure system names, interface IPs and enable MPLS on all routers in the MPLS backbone

**********************************PE01
sys
sysname PE01
#
mpls lsr-id 1.1.1.1
mpls
#
mpls ldp
#
interface GigabitEthernet0/0/2
 ip address 10.10.10.0 255.255.255.254
 mpls
 mpls ldp
#
interface LoopBack0
 ip address 1.1.1.1 255.255.255.255
#

**********************************P01
sys
sysname P01
#
mpls lsr-id 2.2.2.2
mpls
#
mpls ldp
#
interface GigabitEthernet0/0/0
 ip address 10.10.10.1 255.255.255.254
 mpls
 mpls ldp
#
interface GigabitEthernet0/0/1
 ip address 10.10.10.2 255.255.255.254
 mpls
 mpls ldp
#
interface LoopBack0
 ip address 2.2.2.2 255.255.255.255
#

**********************************PE02
sys
sysname PE02
#
mpls lsr-id 3.3.3.3
mpls
#
mpls ldp
#
interface GigabitEthernet0/0/0
 ip address 10.10.10.3 255.255.255.254
 mpls
 mpls ldp
#
interface LoopBack0
 ip address 3.3.3.3 255.255.255.255
#

Step 2: Configure OSPF in the MPLS backbone and verify OSPF adjacency status.

******************************PE01
#
ospf 10 router-id 1.1.1.1
 area 0.0.0.0
  network 1.1.1.1 0.0.0.0
  network 10.10.10.0 0.0.0.1
#

******************************P01
#
ospf 10 router-id 2.2.2.2
 area 0.0.0.0
  network 2.2.2.2 0.0.0.0
  network 10.10.10.0 0.0.0.1
  network 10.10.10.2 0.0.0.1
#

******************************PE02
#
ospf 10 router-id 3.3.3.3
 area 0.0.0.0
  network 3.3.3.3 0.0.0.0
  network 10.10.10.2 0.0.0.1
#

Step 3: Configure MP-BGP between PE01 and PE02 and verify status.

*****************************PE01
#
bgp 100
 router-id 1.1.1.1
 peer 3.3.3.3 as-number 100
 peer 3.3.3.3 connect-interface LoopBack0
 #
 ipv4-family unicast
  undo synchronization
  undo peer 3.3.3.3 enable
 #
 ipv4-family vpnv4
  policy vpn-target
  peer 3.3.3.3 enable
#

*****************************PE02
#
bgp 100
 router-id 3.3.3.3
 peer 1.1.1.1 as-number 100
 peer 1.1.1.1 connect-interface LoopBack0
 #
 ipv4-family unicast
  undo synchronization
  undo peer 1.1.1.1 enable
 #

 ipv4-family vpnv4
  policy vpn-target
  peer 1.1.1.1 enable
#

Step 4: Configure VPN instances on PE01 and PE02 and bind customer facing interfaces to the VPN instances. Assign IP addresses to customer-facing interfaces.

********************************PE01
ip vpn-instance CE01_CE03_VPN
 ipv4-family
  route-distinguisher 100:1
  vpn-target 100:1 export-extcommunity
  vpn-target 100:1 import-extcommunity
#
ip vpn-instance CE02_CE04_VPN
 ipv4-family
  route-distinguisher 100:2
  vpn-target 100:2 export-extcommunity
  vpn-target 100:2 import-extcommunity
#
interface GigabitEthernet0/0/0
 ip binding vpn-instance CE01_CE03_VPN
 ip address 10.10.10.4 255.255.255.254
#
interface GigabitEthernet0/0/1
 ip binding vpn-instance CE02_CE04_VPN
 ip address 10.10.10.6 255.255.255.254
#

********************************PE02
ip vpn-instance CE01_CE03_VPN
 ipv4-family
  route-distinguisher 100:1
  vpn-target 100:1 export-extcommunity
  vpn-target 100:1 import-extcommunity
#
ip vpn-instance CE02_CE04_VPN
 ipv4-family
  route-distinguisher 100:2
  vpn-target 100:2 export-extcommunity
  vpn-target 100:2 import-extcommunity
#
interface GigabitEthernet0/0/1
 ip binding vpn-instance CE01_CE03_VPN
 ip address 10.10.10.10 255.255.255.254
#
interface GigabitEthernet0/0/2
 ip binding vpn-instance CE02_CE04_VPN
 ip address 10.10.10.8 255.255.255.254
#

Step 5: Configure BGP peering to CEs on PE01 and PE02

*****************************PE01
bgp 100
 ipv4-family vpn-instance CE01_CE03_VPN
  peer 10.10.10.5 as-number 200
 #
 ipv4-family vpn-instance CE02_CE04_VPN
  peer 10.10.10.7 as-number 300
#

*****************************PE02
bgp 100
 ipv4-family vpn-instance CE01_CE03_VPN
  peer 10.10.10.11 as-number 300
 #
 ipv4-family vpn-instance CE02_CE04_VPN
  peer 10.10.10.9 as-number 400
#

Step 7: Configure CEs

******************************CE01
sys
sysname CE01
#
interface GigabitEthernet0/0/0
 ip address 10.10.10.5 255.255.255.254
#
#
interface LoopBack0
 ip address 6.6.6.6 255.255.255.255
#
bgp 200
 peer 10.10.10.4 as-number 100
 #
 ipv4-family unicast
  undo synchronization
  network 6.6.6.6 255.255.255.255
  peer 10.10.10.4 enable
#
commit

******************************CE02
sys
sysname CE02
#
interface GigabitEthernet0/0/0
 ip address 10.10.10.7 255.255.255.254
#
#
interface LoopBack0
 ip address 7.7.7.7 255.255.255.255
#
bgp 300
 peer 10.10.10.6 as-number 100
 #
 ipv4-family unicast
  undo synchronization
  network 7.7.7.7 255.255.255.255
  peer 10.10.10.6 enable
#
commit

******************************CE03
sys
sysname CE03
#
interface GigabitEthernet0/0/0
 ip address 10.10.10.11 255.255.255.254
#
#
interface LoopBack0
 ip address 4.4.4.4 255.255.255.255
#
bgp 400
 peer 10.10.10.10 as-number 100
 #
 ipv4-family unicast
  undo synchronization
  network 4.4.4.4 255.255.255.255
  peer 10.10.10.10 enable
#
commit

******************************CE04
sys
sysname CE04
#
interface GigabitEthernet0/0/0
 ip address 10.10.10.9 255.255.255.254
#
#
interface LoopBack0
 ip address 5.5.5.5 255.255.255.255
#
bgp 400
 peer 10.10.10.8 as-number 100
 #
 ipv4-family unicast
  undo synchronization
  network 5.5.5.5 255.255.255.255
  peer 10.10.10.8 enable
#
commit

Step 8: Verify BGP peering between CEs and PEs is up and routes are propagated between CEs in the same VPN Instance.

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