Enable MPLS - On Service Provider Core Network

Service Provider Network

Enable MPLS on Service Provider Core Network

Assumptions:

a). IGP and BGP already running on service provider network.

b). Traditional routing working ok.

Configuration:

1. Enable MPLS on all core routers (PE & P)

PE1# conf t

PE1(config)# mpls ip

PE1(config)# int g2/0

PE1(config-if)# mpls ip

PE1(config-if)# int g3/0

PE1(config-if)# mpls ip

    PE2# conf t

    PE2(config)# mpls ip

    PE2(config)# int g2/0

    PE2(config-if)# mpls ip

    PE2(config-if)# int g3/0

    PE2(config-if)# mpls ip

  P# conf t

    P(config)# mpls ip

    P(config)# int g2/0

    P(config-if)# mpls ip

    P(config-if)# int g3/0

    P(config-if)# mpls ip

2. Confirm that LDP comes up with loopback address as the router ID

PE1# show mpls ldp neighbor

Peer LDP Ident: 2.2.2.2:0; Local LDP Ident 1.1.1.1:0

TCP connection: 2.2.2.2.36878 - 1.1.1.1.646

State: Oper; Msgs sent/rcvd: 22/22; Downstream

Up time: 00:08:26

LDP discovery sources:

GigabitEthernet2/0, Src IP addr: 10.10.0.2

Addresses bound to peer LDP Ident:

10.10.0.2 10.10.0.5 2.2.2.2

Peer LDP Ident: 5.5.5.5:0; Local LDP Ident 1.1.1.1:0

TCP connection: 5.5.5.5.28414 - 1.1.1.1.646

State: Oper; Msgs sent/rcvd: 13/13; Downstream

Up time: 00:00:17

LDP discovery sources:

GigabitEthernet3/0, Src IP addr: 10.10.0.17

Addresses bound to peer LDP Ident:

10.10.0.14 10.10.0.17 5.5.5.5

3. Confirm Interfaces Enabled for MPLS (All facing core network should be present);

R1#show mpls interfaces

Interface IP Tunnel Operational

GigabitEthernet1/0 Yes (ldp) No Yes

GigabitEthernet2/0 Yes (ldp) No Yes

FastEthernet3/0 Yes (ldp) No Yes

END.

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