MPLS basic experiment configuration

MPLS advantage

• MPLS Is to forward data through tags , Speed up data forwarding efficiency .
• MPLS It can carry many different types of traffic .
• MPLS Be able to set the pre programmed fallback path , It can quickly switch the failure path .
• MPLS Be able to allocate traffic QoS function .

The topology

Experiment explanation

OSPF To configure , Ensure intra network communication

• This time MPLS Basic experiments include 4 Router , Use OSPF Dynamic routing protocol ensures the communication within the network , The following is OSPF Configuration of .

R1：
int g0/0/0
ip add 12.1.1.1 24
interface LoopBack0
ip address 1.1.1.1 32

ospf 1 router-id 1.1.1.1
area 0
network 1.1.1.1 0.0.0.0
network 12.1.1.0 0.0.0.255

R2：
int g0/0/0
ip add 12.1.1.2 24
interface LoopBack0
ip address 2.2.2.2 32
int g0/0/1
ip add 23.1.1.2 24

ospf 1 router-id 2.2.2.2
area 0
network 2.2.2.2 0.0.0.0
network 12.1.1.0 0.0.0.255
network 23.1.1.0 0.0.0.255

R3：
int g0/0/0
ip add 23.1.1.3 24
interface LoopBack0
ip address 3.3.3.3 32
int g0/0/1
ip add 34.1.1.3 24

ospf 1 router-id 3.3.3.3
area 0
network 3.3.3.3 0.0.0.0
network 34.1.1.0 0.0.0.255
network 23.1.1.0 0.0.0.255

R4：
int g0/0/0
ip add 34.1.1.4 24
interface LoopBack0
ip address 4.4.4.4 32

ospf 1 router-id 4.4.4.4
area 0
network 4.4.4.4 0.0.0.0
network 34.1.1.0 0.0.0.255

• Check it out ospf Configuration is successful ：
  

To configure MPLS

R1：
mpls lsr-id 1.1.1.1  // Configure label switching router id Number 
mpls  // Enable MPLS
q
mpls ldp  // Enable Label Distribution Protocol 
q
int g0/0/0  // Enter the interface and enable it again MPLS
mpls
mpls ldp
q

R2：
mpls lsr-id 2.2.2.2
mpls
q
mpls ldp
q
int g0/0/0
mpls
mpls ldp
q
int g0/0/1
mpls
mpls ldp
q

R3：
mpls lsr-id 3.3.3.3
mpls
q
mpls ldp
q
int g0/0/0
mpls
mpls ldp
q
int g0/0/1
mpls
mpls ldp
q

R4：
mpls lsr-id 4.4.4.4
mpls
q
mpls ldp
q
int g0/0/0
mpls
mpls ldp
q

• verification MPLS Configuration is successful ：

Use command dis mpls ldp peer View neighbor status ,R1 The neighbor has been successfully matched 2.2.2.2, That's the router R2, Find out the source is G0/0/0 mouth .

• R2 The router found two neighbors , The discovery sources are two interfaces G0/0/0 and G0/0/1.

• Use command dis mpls lsp Check the label exchange protocol and label number .

• Use command tracert lsp ip 4.4.4.4 32 Check the tag status in the forwarding path , You can see that there was no label at first , To 12.1.1.2 When pressing a label 1026, To the last 34.1.1.4 Time label is 3, And the next jump type yes egress, Represents the next hop peel label , Data arrives 4.4.4.4.

• You can also see that the tag in the packet is 1026.