1. 配置IP地址
[LSR1-GigabitEthernet0/0/0]ip add 10.1.1.1 24
[LSR1-LoopBack0]ip add 1.1.1.1 32
[LSR2-GigabitEthernet0/0/0]ip add 10.1.1.2 24
[LSR2-GigabitEthernet0/0/1]ip add 10.1.2.2 24
[LSR2-LoopBack0]ip add 2.2.2.2 32
[LSR3-GigabitEthernet0/0/0]ip add 10.1.2.3 24
[LSR3-LoopBack0]ip add 3.3.3.3 32
2. 配置OSPF协议发布各节点接口所连网段和LSR ID的主机路由
[LSR1]ospf 1
[LSR1-ospf-1]area 0
[LSR1-ospf-1-area-0.0.0.0]network 10.1.1.0 0.0.0.255
[LSR1-ospf-1-area-0.0.0.0]network 1.1.1.1 0.0.0.0
[LSR2]ospf 1
[LSR2-ospf-1]area 0
[LSR2-ospf-1-area-0.0.0.0]network 10.1.1.0 0.0.0.255
[LSR2-ospf-1-area-0.0.0.0]network 10.1.2.0 0.0.0.255
[LSR2-ospf-1-area-0.0.0.0]network 2.2.2.2 0.0.0.0
[LSR3]ospf 1
[LSR3-ospf-1]area 0
[LSR3-ospf-1-area-0.0.0.0]network 10.1.2.0 0.0.0.255
[LSR3-ospf-1-area-0.0.0.0]network 3.3.3.3 0.0.0.0
3. 配置各节点和接口的MPLS和MPLS LDP能力
[LSR1]mpls lsr-id 1.1.1.1
[LSR1]mpls
[LSR1]mpls ldp
[LSR1-GigabitEthernet0/0/0]mpls
[LSR1-GigabitEthernet0/0/0]mpls ldp
[LSR2]mpls lsr-id 2.2.2.2
[LSR2]mpls
[LSR2]mpls ldp
[LSR2-GigabitEthernet0/0/0]mpls
[LSR2-GigabitEthernet0/0/0]mpls ldp
[LSR2-GigabitEthernet0/0/1]mpls
[LSR2-GigabitEthernet0/0/1]mpls ldp
[LSR3]mpls lsr-id 3.3.3.3
[LSR3]mpls
[LSR3]mpls ldp
[LSR3-GigabitEthernet0/0/0]mpls
[LSR3-GigabitEthernet0/0/0]mpls ldp
4. 配置LDP GTSM
[LSR1]mpls ldp
[LSR1-mpls-ldp]gtsm peer 2.2.2.2 valid-ttl-hops 3 //LSRB发送给LSRA的LDP报文的有效TTL范围是253到255
[LSR2]mpls ldp
[LSR2-mpls-ldp]gtsm peer 1.1.1.1 valid-ttl-hops 4 //LSRA发送给LSRB的LDP报文的有效TTL范围是252到255
[LSR2-mpls-ldp]gtsm peer 3.3.3.3 valid-ttl-hops 5 //LSRC发送给LSRB的LDP报文的有效TTL范围是251到255
[LSR3]mpls ldp
[LSR3-mpls-ldp]gtsm peer 2.2.2.2 valid-ttl-hops 6 //LSRB发送给LSRC的LDP报文的有效TTL范围是250到255
