1. 配置IP地址
[LSR1-GigabitEthernet0/0/0]ip add 20.1.1.1 24
[LSR1-GigabitEthernet0/0/2]ip add 20.4.1.1 24
[LSR1-LoopBack0]ip add 1.1.1.1 32
[LSR2-GigabitEthernet0/0/0]ip add 20.1.1.2 24
[LSR2-GigabitEthernet0/0/1]ip add 20.2.1.2 24
[LSR2-GigabitEthernet0/0/2]ip add 20.7.1.2 24
[LSR2-LoopBack0]ip add 2.2.2.2 32
[LSR3-GigabitEthernet0/0/0]ip add 20.2.1.3 24
[LSR3-GigabitEthernet0/0/2]ip add 20.6.1.3 24
[LSR3-LoopBack0]ip add 3.3.3.3 32
[LSR4-GigabitEthernet0/0/0]ip add 20.4.1.4 24
[LSR4-GigabitEthernet0/0/1]ip add 20.6.1.4 24
[LSR4-GigabitEthernet0/0/2]ip add 20.7.1.4 24
[LSR4-LoopBack0]ip add 4.4.4.4 32
2. 配置OSPF
[LSR1]ospf 1
[LSR1-ospf-1]area 0
[LSR1-ospf-1-area-0.0.0.0]network 20.1.1.0 0.0.0.255
[LSR1-ospf-1-area-0.0.0.0]network 20.4.1.0 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 2.2.2.2 0.0.0.0
[LSR2-ospf-1-area-0.0.0.0]network 20.1.1.0 0.0.0.255
[LSR2-ospf-1-area-0.0.0.0]network 20.2.1.0 0.0.0.255
[LSR2-ospf-1-area-0.0.0.0]network 20.7.1.0 0.0.0.255
[LSR3]ospf 1
[LSR3-ospf-1]area 0
[LSR3-ospf-1-area-0.0.0.0]network 20.2.1.0 0.0.0.255
[LSR3-ospf-1-area-0.0.0.0]network 20.6.1.0 0.0.0.255
[LSR3-ospf-1-area-0.0.0.0]network 3.3.3.3 0.0.0.0
[LSR4]ospf 1
[LSR4-ospf-1]area 0
[LSR4-ospf-1-area-0.0.0.0]network 4.4.4.4 0.0.0.0
[LSR4-ospf-1-area-0.0.0.0]network 20.4.1.0 0.0.0.255
[LSR4-ospf-1-area-0.0.0.0]network 20.6.1.0 0.0.0.255
[LSR4-ospf-1-area-0.0.0.0]network 20.7.1.0 0.0.0.255
3. 配置MPLS基本能力，使能MPLS TE、RSVP-TE，在主隧道的入节点上使能CSPF
[LSR1]mpls lsr-id 1.1.1.1
[LSR1]mpls
[LSR1-mpls]mpls te
[LSR1-mpls]mpls rsvp-te
[LSR1-mpls]mpls te cspf
[LSR1-GigabitEthernet0/0/0]mpls
[LSR1-GigabitEthernet0/0/0]mpls te
[LSR1-GigabitEthernet0/0/0]mpls rsvp-te
[LSR1-GigabitEthernet0/0/2]mpls
[LSR1-GigabitEthernet0/0/2]mpls te
[LSR1-GigabitEthernet0/0/2]mpls rsvp-te
[LSR2]mpls lsr-id 2.2.2.2
[LSR2]mpls
[LSR2-mpls]mpls te
[LSR2-mpls]mpls rsvp-te
[LSR2-GigabitEthernet0/0/0]mpls
[LSR2-GigabitEthernet0/0/0]mpls te
[LSR2-GigabitEthernet0/0/0]mpls rsvp-te
[LSR2-GigabitEthernet0/0/1]mpls
[LSR2-GigabitEthernet0/0/1]mpls te
[LSR2-GigabitEthernet0/0/1]mpls rsvp-te
[LSR2-GigabitEthernet0/0/2]mpls
[LSR2-GigabitEthernet0/0/2]mpls te
[LSR2-GigabitEthernet0/0/2]mpls rsvp-te
[LSR3]mpls lsr-id 3.3.3.3
[LSR3]mpls
[LSR3-mpls]mpls te
[LSR3-mpls]mpls rsvp-te
[LSR3-GigabitEthernet0/0/0]mpls
[LSR3-GigabitEthernet0/0/0]mpls te
[LSR3-GigabitEthernet0/0/0]mpls rsvp-te
[LSR3-GigabitEthernet0/0/2]mpls
[LSR3-GigabitEthernet0/0/2]mpls te
[LSR3-GigabitEthernet0/0/2]mpls rsvp-te
[LSR4]mpls lsr-id 4.4.4.4
[LSR4]mpls
[LSR4-mpls]mpls te
[LSR4-mpls]mpls rsvp-te
[LSR4-GigabitEthernet0/0/0]mpls
[LSR4-GigabitEthernet0/0/0]mpls te
[LSR4-GigabitEthernet0/0/0]mpls rsvp-te
[LSR4-GigabitEthernet0/0/1]mpls
[LSR4-GigabitEthernet0/0/1]mpls te
[LSR4-GigabitEthernet0/0/1]mpls rsvp-te
[LSR4-GigabitEthernet0/0/2]mpls
[LSR4-GigabitEthernet0/0/2]mpls te
[LSR4-GigabitEthernet0/0/2]mpls rsvp-te
4. 配置OSPF TE
[LSR1]ospf 1
[LSR1-ospf-1]opaque-capability enable
[LSR1-ospf-1]area 0
[LSR1-ospf-1-area-0.0.0.0]mpls-te enable
[LSR2]ospf 1
[LSR2-ospf-1]opaque-capability enable
[LSR2-ospf-1]area 0
[LSR2-ospf-1-area-0.0.0.0]mpls-te enable
[LSR3]ospf 1
[LSR3-ospf-1]opaque-capability enable
[LSR3-ospf-1]area 0
[LSR3-ospf-1-area-0.0.0.0]mpls-te enable
[LSR4]ospf 1
[LSR4-ospf-1]opaque-capability enable
[LSR4-ospf-1]area 0
[LSR4-ospf-1-area-0.0.0.0]mpls-te enable
5. 配置主、备CR-LSP使用的显式路径
[LSR1]explicit-path pp1 //配置主CR-LSP使用的显式路径
[LSR1-explicit-path-pp1]next hop 20.1.1.2
[LSR1-explicit-path-pp1]next hop 20.2.1.3
[LSR1-explicit-path-pp1]next hop 3.3.3.3
[LSR1]explicit-path bp1 //配置备份CR-LSP使用的显式路径
[LSR1-explicit-path-bp1]next hop 20.4.1.4
[LSR1-explicit-path-bp1]next hop 20.6.1.3
[LSR1-explicit-path-bp1]next hop 3.3.3.3
6. 配置隧道接口
[LSR1]int Tunnel 0/0/1
[LSR1-Tunnel0/0/1]ip address unnumbered interface LoopBack 0
[LSR1-Tunnel0/0/1]tunnel-protocol mpls te
[LSR1-Tunnel0/0/1]destination 3.3.3.3
[LSR1-Tunnel0/0/1]mpls te tunnel-id 100
[LSR1-Tunnel0/0/1]mpls te record-route
[LSR1-Tunnel0/0/1]mpls te path explicit-path pp1 //指定显式路径
[LSR1-Tunnel0/0/1]mpls te backup hot-standby wtr 15 //配置CR-LSP热备份，回切时间为15秒
[LSR1-Tunnel0/0/1]mpls te path explicit-path bp1 secondary //指定备份显式路径
[LSR1-Tunnel0/0/1]mpls te backup ordinary best-effort //配置逃生路径
[LSR1-Tunnel0/0/1]mpls te commit
7. 在入节点配置动态BFD for CR-LSP：在入节点配置动态BFD for CR-LSP功能，指定本地发送BFD报文的时间间隔和允许接收的时间间隔为500毫秒，BFD本地检测倍数为3
[LSR1]bfd
[LSR1]int Tunnel 0/0/1
[LSR1-Tunnel0/0/1]mpls te bfd enable
[LSR1-Tunnel0/0/1]mpls te bfd min-rx-interval 500 min-tx-interval 500 detect-multiplier 3
[LSR1-Tunnel0/0/1]mpls te commit
8. 在出节点使能被动创建BFD会话
[LSR3]bfd
[LSR3-bfd]mpls-passive
