Basic MPLS Configuration

Basic MPLS Configuration

[Requirements]

1. RTA is the P equipment, and RTB and RTC are the PE equipment.

2. 192.168.11.1/24 and 192.168.12.1/24 belong to vpna, and 192.168.21.1/24 and 192.168.22.1/24 belong to vpnb. Interworking is available only in the same VPN instead of between VPNs.

[Networking diagram]

[Configuration script]

Configuration script (RTA)

#  sysname RTA #  router id 1.1.1.1                      /Configure router id/ #  mpls lsr-id 1.1.1.1                    /Configure mpls lsr-rd/ # mpls                                    /Enable MPLS globally/ #  mpls ldp                               /Enable LDP/ # interface Ethernet0/0  ip address 10.1.1.1 255.255.255.252  mpls                                   /Enable MPLS on the interface/  mpls ldp enable                        /Enable LDP on the interface/ # interface Ethernet3/0  ip address 10.1.1.5 255.255.255.252  mpls                                   /Enable MPLS on the interface/  mpls ldp enable                        /Enable LDP on the interface/ # interface LoopBack0  ip address 1.1.1.1 255.255.255.255     /Set loopback 0 address to router id/ # ospf 1  area 0.0.0.0   network 1.1.1.1 0.0.0.0               /Enable OSPF on loopback0/   network 10.1.1.0 0.0.0.3              /Enable OSPF on the interface/   network 10.1.1.4 0.0.0.3              /Enable OSPF on the interface/ # return

Configuration script (RTB)

#  sysname RTB #  router id 1.1.1.2                        /Configure router id/ #  mpls lsr-id 1.1.1.2                      /Configure mpls lsr-rd/ # mpls                                      /Enable MPLS globally/ #  mpls ldp                                 /Enable LDP/ # ip vpn-instance vpna                      /Create the instance vpna/  route-distinguisher 100:1                /Configure RD=100:1/  vpn-target 100:1 export-extcommunity     /Configure RT=100:1 export/  vpn-target 100:1 import-extcommunity     /Configure RT=100:1 import/ # ip vpn-instance vpnb                      /Create the instance vpnb, and configure RD=200:1 and RT=200:1/  route-distinguisher 200:1  vpn-target 200:1 export-extcommunity  vpn-target 200:1 import-extcommunity     # interface Ethernet0/0  ip address 10.1.1.2 255.255.255.252  mpls                                    /Enable MPLS on the interface/  mpls ldp enable                         /Enable LDP on the interface/ # interface LoopBack0  ip address 1.1.1.2 255.255.255.255     /Set loopback 0 address to router id/ # interface LoopBack11  ip binding vpn-instance vpna           /Bind the interface with vpna/  ip address 192.168.11.1 255.255.255.0 # interface LoopBack21  ip binding vpn-instance vpnb           /Bind the interface with vpnb/  ip address 192.168.21.1 255.255.255.0 # bgp 100  undo synchronization                   /Cancel BGP synchronization/  group inter internal                   /Create the internal group inter/  peer 1.1.1.3 group inter               /Set up iBGP relation with 1.1.1.3/  peer 1.1.1.3 connect-interface LoopBack0 /Use loopback 0 to set up BGP connection/  #  ipv4-family vpn-instance vpna            /Associate vpna with the MBGP address family/   import-route direct                     /Import direct route/   undo synchronization                    /Cancel BGP synchronization/  #  ipv4-family vpn-instance vpnb            / Associate vpnb with the MBGP address family/   import-route direct   undo synchronization  #  ipv4-family vpnv4                       /Enter the MBGP VPNv4 address family view/   peer inter enable                      /Enable the inter group/   peer 1.1.1.3 group inter               /Enable 1.1.1.3/ # ospf 1  area 0.0.0.0   network 1.1.1.2 0.0.0.0                /Enable OSPF on loopback0/   network 10.1.1.0 0.0.0.3               /Enable OSPF on the interface/ # return

Configuration script (RTC)

#  sysname RTC #  router id 1.1.1.3                       /Configure router id/ #  mpls lsr-id 1.1.1.3                     /Configure mpls lsr-rd/ # mpls                                     /Enable MPLS globally/ #  mpls ldp                                /Enable LDP/ # ip vpn-instance vpna                     /Create the instance vpna/  route-distinguisher 100:1               /Configure RD=100:1/  vpn-target 100:1 export-extcommunity    /Configure RT=100:1 export/  vpn-target 100:1 import-extcommunity    /Configure RT=100:1 import/ # ip vpn-instance vpnb                     /Create the instance vpnb, and configure RD=200:1 and RT=200:1/  route-distinguisher 200:1                vpn-target 200:1 export-extcommunity     vpn-target 200:1 import-extcommunity    # interface Ethernet2/0  ip address 10.1.1.6 255.255.255.252  mpls                                    /Enable MPLS on the interface/  mpls ldp enable                         /Enable LDP on the interface/ # interface LoopBack0  ip address 1.1.1.3 255.255.255.255      /Set loopback 0 address to router id/ # interface LoopBack12  ip binding vpn-instance vpna           /Bind the interface with vpna/  ip address 192.168.12.1 255.255.255.0 # interface LoopBack22  ip binding vpn-instance vpnb           /Bind the interface with vpnb/  ip address 192.168.22.1 255.255.255.0 # bgp 100  undo synchronization                      /Cancel BGP synchronization/  group inter internal                      /Create the internal group inter/  peer 1.1.1.2 group inter                  /Set up iBGP relation with 1.1.1.2/  peer 1.1.1.2 connect-interface LoopBack0  /Use loopback 0 to set up BGP connection/  #  ipv4-family vpn-instance vpna             /Associate vpna with the MBGP address family/   import-route direct                      /Import direct route/   undo synchronization                     /Cancel BGP synchronization/  #  ipv4-family vpn-instance vpnb             / Associate vpnb with the MBGP address family/   import-route direct   undo synchronization  #  ipv4-family vpnv4                         /Enter the MBGP VPNv4 address family view/   peer inter enable                        /Enable the inter group/   peer 1.1.1.2 group inter                 /Enable 1.1.1.2/ # ospf 1  area 0.0.0.0   network 1.1.1.3 0.0.0.0             /Enable OSPF on loopback0/   network 10.1.1.4 0.0.0.3            /Enable OSPF on the interface/ # return

 

[Tip]

1.  RTA serves as the P equipment, and forwards MPLS packets independent of any VPN.

2. The address of Int loopback0 must be configured to the 32bit subnet mask.