华为设备配置基于TE Auto FRR的SRLG（华为传输设备配置）

华为设备配置基于TE Auto FRR的SRLG（华为传输设备配置）

1. 配置IP地址

[LSR1-GigabitEthernet0/0/0]ip add 20.1.1.1 24

[LSR1-GigabitEthernet0/0/1]ip add 20.3.1.1 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-LoopBack0]ip add 2.2.2.2 32

[LSR3-GigabitEthernet0/0/0]ip add 20.2.1.3 24

[LSR3-GigabitEthernet0/0/1]ip add 20.5.1.3 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-LoopBack0]ip add 4.4.4.4 32

[LSR5-GigabitEthernet0/0/0]ip add 20.3.1.5 24

[LSR5-GigabitEthernet0/0/1]ip add 20.5.1.5 24

[LSR5-LoopBack0]ip add 5.5.5.5 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 20.3.1.0 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]ne

[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]ne

[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

[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 20.5.1.0 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

[LSR5]ospf 1

[LSR5-ospf-1]area 0

[LSR5-ospf-1-area-0.0.0.0]network 5.5.5.5 0.0.0.0

[LSR5-ospf-1-area-0.0.0.0]network 20.3.1.0 0.0.0.255

[LSR5-ospf-1-area-0.0.0.0]network 20.5.1.0 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-GigabitEthernet0/0/1]mpls

[LSR1-GigabitEthernet0/0/1]mpls te

[LSR1-GigabitEthernet0/0/1]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

[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-GigabitEthernet0/0/1]mpls

[LSR3-GigabitEthernet0/0/1]mpls te

[LSR3-GigabitEthernet0/0/1]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

[LSR5]mpls lsr-id 5.5.5.5

[LSR5]mpls

[LSR5-mpls]mpls te

[LSR5-mpls]mpls rsvp-te

[LSR5-GigabitEthernet0/0/0]mpls

[LSR5-GigabitEthernet0/0/0]mpls te

[LSR5-GigabitEthernet0/0/0]mpls rsvp-te

[LSR5-GigabitEthernet0/0/1]mpls

[LSR5-GigabitEthernet0/0/1]mpls te

[LSR5-GigabitEthernet0/0/1]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

[LSR5]ospf 1

[LSR5-ospf-1]opaque-capability enable

[LSR5-ospf-1]area 0

[LSR5-ospf-1-area-0.0.0.0]mpls-te enable

5. 在入节点LSR1上创建主CR-LSP的MPLS TE Tunnel

[LSR1]explicit-path pp1  //配置主CR-LSP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]interface Tunnel 0/0/1  //配置主CR-LSP的MPLS TE隧道接口

[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 path explicit-path pp1

[LSR1-Tunnel0/0/1]mpls te commit

6. 配置SRLG: 链路LSR1→LSR2和LSR1→LSR4属于SRLG1;在主隧道入节点LSR1配置SRLG路径计算模式

[LSR1-GigabitEthernet0/0/0]mpls te srlg 1

[LSR1-GigabitEthernet0/0/2]mpls te srlg 1

[LSR1]mpls

[LSR1-mpls]mpls te srlg path-calculation preferred  //配置SRLG路径计算模式

7. 在入节点配置TE Auto FRR

[LSR1]mpls

[LSR1-mpls]mpls te auto-frr

[LSR1]int Tunnel 0/0/1

[LSR1-Tunnel0/0/1]mpls te fast-reroute

[LSR1-Tunnel0/0/1]mpls te commit

看到Bypass CR-LSP已经成功建立

可发现LSR1的主隧道出接口（20.1.1.1）上有Local-Protection

8. 检查配置

看到主隧道上绑定了一条Bypass CR-LSP（Tunnel0/0/2048），FrrNextHop为20.5.1.3

发现Bypass CR-LSP的路径为LSR1→LSR5→LSR3

[LSR1-GigabitEthernet0/0/1]shutdown

发现主隧道与Tunnel0/0/2049绑定，FrrNextHop为20.6.1.3

发现Bypass CR-LSP的路径为LSR1→LSR4→LSR3,这是因为SRLG路径计算模式配置为preferred,在计算Bypass CR-LSP的路径时，CSPF考虑SRLG作为约束条件之一，如果绑定失败，则CSPF不再将SRLG作为约束条件

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