Maipu - Basic MPLS

In this section, we will see how to configure Basic MPLS in Maipu Routers. Since configuring MPLS in Cisco and Maipu is having little bit difference, not much.

MPLS means you all know, configuring LDP in routers and establishing ldp neighborship with peer routers.

Here is setup of three Maipu routers.

Description -

In the configuration instance, router 1 and router 3 are PE devices; router 2 is the P device; the P and PE devices form the MPLS backbone network. Here, router 1 and router 2 are connected via the serial port; router 2 and router 3 are connected via Ethernet interface. In the MPLS backbone network, OSPF is running as IGP routing protocol and label distributing protocol LDP for label distribution.

Topology 

MPLS Network

Configurations - 

The configuration of router 1:

Command	Description
Router1(config)# mpls ip	Enable the global MPLS label forwarding
Router1(config)# interface loopback0	Configure the loopback port (IP address is 1.1.1.1)
Router1 (config-if-loopback0)# ip address 1.1.1.1 255.255.255.255
Router1 (config-if-loopback0)# exit
Router1 (config)# interface serial 0/1	Configure the interface connected to P (router 2)
Router1 (config-if-serial0/1)# physical-layer sync
Router1 (config-if-serial0/1)# encapsulation ppp
Router1 (config-if-serial0/1)# ip address 21.0.0.1 255.255.255.0
Router1 (config-if-serial0/1)# mpls ip	Enable the label forwarding of the interface
Router1 (config-if-serial0/1)# mpls ldp	Enable the LDP protocol on the interface
Router1 (config-if-serial0/1)# exit
Router1 (config)# router ospf 1	Configure IGP (OSPF)
Router1 (config-ospf)# network 1.1.1.1 0.0.0.0 area 0
Router1 (config-ospf)# network 21.0.0.0 0.0.0.255 area 0
Router1 (config-ospf)#exit
Router1 (config)# mpls ldp	Configure the LDP protocol
Router1 (config-ldp)# router-id 1.1.1.1	Configure the router-id of the LDP
Router1 (config-ldp)# transport-address 1.1.1.1	Configure the LDP transmission address
Router1 (config-ldp)#exit

The configuration of router 2:

Command	Description
Router2(config)# mpls ip	Enable the global MPLS label forwarding
Router2(config)# interface loopback0	Configure the loopback port (the IP address is 2.2.2.2)
Router2 (config-if-loopback0)# ip address 2.2.2.2 255.255.255.255
Router2 (config-if-loopback0)# exit
Router2 (config)# interface fastethernet 1	Configure the interface connected to PE (router 3)
Router2 (config-if-fastethernet1)# ip address 22.0.0.1 255.255.255.0	Configure the IP address
Router2 (config-if-fastethernet1)# mpls ip	Enable the label forwarding of the interface
Router2 (config-if-fastethernet1)# mpls ldp	Enable the LDP protocol on the interface
Router2 (config-if-fastethernet1)#exit
Router2 (config)# interface serial0/1	Configure the interface connected to PE (router 1)
Router2 (config-if-serial0/1)# physical-layer sync
Router2 (config-if-serial0/1)# clock rate 2000000
Router2 (config-if-serial0/1)# encapsulation ppp
Router2 (config-if-serial0/1)# ip address 21.0.0.2 255.255.255.0
Router2 (config-if-serial0/1)# mpls ip	Enable the label forwarding of the interface
Router2 (config-if-serial0/1)# mpls ldp	Enable the LDP protocol on the interface
Router2 (config-if-serial0/1)# exit
Router2 (config)# router ospf 1	Configure IGP (OSPF)
Router2 (config-ospf)# network 21.0.0.0 0.0.0.255 area 0
Router2 (config-ospf)# network 22.0.0.0 0.0.0.255 area 0
Router2 (config-ospf)# network 2.2.2.2 0.0.0.0 area 0
Router2 (config-ospf)#exit
Router2 (config)# mpls ldp	Configure the LDP protocol
Router2 (config-ldp)# router-id 2.2.2.2	Configure the router-id of the LDP
Router2 (config-ldp)# transport-address 2.2.2.2	Configure the LDP transmission address
Router2 (config-ldp)#exit

The configuration of router 3:

Command	Description
Router3(config)# mpls ip	Enable the global MPLS label forwarding
Router3(config)# interface loopback0	Configure the loopback port (the IP address is 3.3.3.3)
Router3 (config-if-loopback0)# ip address 3.3.3.3 255.255.255.255
Router3 (config-if-loopback0)# exit
Router3 (config)# interface fastethernet 1	Configure the interface connected to P (router 2)
Router3 (config-if-fastethernet1)# ip address 22.0.0.2 255.255.255.0	Configure the IP address
Router3 (config-if-fastethernet1)# mpls ip	Enable the label forwarding of the interface
Router3 (config-if-fastethernet1)# mpls ldp	Enable the LDP protocol on the interface
Router3 (config-if-fastethernet1)#exit
Router3 (config)# router ospf 1	Configure IGP (OSPF)
Router3 (config-ospf)# network 22.0.0.0 0.0.0.255 area 0
Router3 (config-ospf)# network 3.3.3.3 0.0.0.0 area 0
Router3 (config-ospf)#exit
Router3 (config)# mpls ldp	Configure the LDP protocol
Router3 (config-ldp)# router-id 3.3.3.3	Configure the router-id of the LDP
Router3 (config-ldp)# transport-address 3.3.3.3	Configure the LDP transmission address
Router3 (config-ldp)#exit

After completing the configuration, use the show mpls ldp session command to view whether the session of targeted-peer is set up or not.

Basically in Maipu your need to configure MPLS ldp in seprate with router-id and with transport address to establish ldp neighborship.

Note - before establishing LDP, Make sure that your IGP is running in cloud. 

Hope this configuration will help you to configure LDP in Maipu router.

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