网络规划设计
1、使用sr-mpls TE
2、SRGB范围统一为16000-23999
3、使用显示路径
NE1配置
pe1\]dis current-configuration sysname pe1 ip vpn-instance a ipv4-family route-distinguisher 1:1 tnl-policy p1 //调用策略p1 vpn-target 1:1 export-extcommunity vpn-target 1:1 import-extcommunity mpls lsr-id 1.1.1.1 mpls mpls te explicit-path te1 //定义两条显示路径先到NE2设备再到NE3 next sid label 16002 type prefix next sid label 16003 type prefix segment-routing //全局开户段路由功能 interface Ethernet1/0/0 undo shutdown ip address 10.0.12.1 255.255.255.0 ospf enable 1 area 0.0.0.0 undo dcn undo dcn mode vlan interface Ethernet1/0/1 undo shutdown ip binding vpn-instance a ip address 10.0.11.1 255.255.255.0 undo dcn undo dcn mode vlan interface LoopBack0 ip address 1.1.1.1 255.255.255.255 ospf enable 1 area 0.0.0.0 ospf prefix-sid index 1 //本节点node sid偏移值，全局唯一 interface Tunnel1 //配置sr-mpls te隧道接口 ip address unnumbered interface LoopBack0 tunnel-protocol mpls te //指定隧道协议 destination 3.3.3.3 隧道对端地址 mpls te signal-protocol segment-routing //使用SR-mpls te作为标签协议 mpls te tunnel-id 1 //配置隧道ID mpls te path explicit-path te1 //调用显示路径 bgp 100 peer 3.3.3.3 as-number 100 peer 3.3.3.3 connect-interface LoopBack0 ipv4-family unicast undo synchronization peer 3.3.3.3 enable ipv4-family vpnv4 policy vpn-target peer 3.3.3.3 enable //跨设备建立vpnv4邻居 ipv4-family vpn-instance a peer 10.0.11.2 as-number 65100 //和ce建立实例bgp邻居 ospf 1 opaque-capability enable //开10类lsb功能 segment-routing mpls //为sr-mpls分配标签 segment-routing global-block 16000 23999 //srgb标签范围，建议所有设备一致 area 0.0.0.0 mpls-te enable //ospf中开户mpls-te功能 tunnel-policy p1 //定义隧道策略 tunnel select-seq sr-te load-balance-number 1 //显示路径只给一条，不让其负载 NE2配置 \[p\]dis current-configuration sysname p mpls lsr-id 2.2.2.2 mpls mpls te segment-routing interface Ethernet1/0/0 undo shutdown ip address 10.0.12.2 255.255.255.0 ospf enable 1 area 0.0.0.0 undo dcn undo dcn mode vlan interface Ethernet1/0/1 undo shutdown ip address 10.0.23.2 255.255.255.0 ospf enable 1 area 0.0.0.0 undo dcn undo dcn mode vlan interface LoopBack0 ip address 2.2.2.2 255.255.255.255 ospf enable 1 area 0.0.0.0 ospf prefix-sid index 2 interface NULL0 ospf 1 opaque-capability enable segment-routing mpls segment-routing global-block 16000 23999 area 0.0.0.0 mpls-te enable NE3配置 \[pe2\]dis current-configuration sysname pe2 ip vpn-instance a ipv4-family route-distinguisher 2:1 tnl-policy p1 vpn-target 1:1 export-extcommunity vpn-target 1:1 import-extcommunity mpls lsr-id 3.3.3.3 mpls mpls te explicit-path te2 next sid label 16002 type prefix next sid label 16001 type prefix segment-routing interface Ethernet1/0/0 undo shutdown ip address 10.0.23.3 255.255.255.0 ospf enable 1 area 0.0.0.0 undo dcn undo dcn mode vlan interface Ethernet1/0/1 undo shutdown ip binding vpn-instance a ip address 10.0.32.3 255.255.255.0 undo dcn undo dcn mode vlan interface LoopBack0 ip address 3.3.3.3 255.255.255.255 ospf enable 1 area 0.0.0.0 ospf prefix-sid index 3 interface Tunnel1 ip address unnumbered interface LoopBack0 tunnel-protocol mpls te destination 1.1.1.1 mpls te signal-protocol segment-routing mpls te tunnel-id 1 mpls te path explicit-path te2 interface NULL0 bgp 100 peer 1.1.1.1 as-number 100 peer 1.1.1.1 connect-interface LoopBack0 ipv4-family unicast undo synchronization peer 1.1.1.1 enable ipv4-family vpnv4 policy vpn-target peer 1.1.1.1 enable ipv4-family vpn-instance a peer 10.0.32.2 as-number 65101 ospf 1 opaque-capability enable segment-routing mpls segment-routing global-block 16000 23999 area 0.0.0.0 mpls-te enable tunnel-policy p1 tunnel select-seq sr-te load-balance-number 1 结果验证 看路由学习情况   查隧道情况   联通性测试   更多技术细节来全球计算机技术群，一起讨论学习！