SR-MPLS BE简单配置实例原理

pe1

[pe1]dis current-configuration
ip vpn-instance vpn
ipv4-family
route-distinguisher 100:100
vpn-target 1:1 export-extcommunity
vpn-target 1:1 import-extcommunity

mpls lsr-id 2.2.2.2

mpls

segment-routing //开启sr功能

interface Ethernet1/0/0
undo shutdown
ip address 10.0.23.2 255.255.255.0
undo dcn
undo dcn mode vlan

interface Ethernet1/0/1
undo shutdown
ip binding vpn-instance vpn
ip address 172.16.0.1 255.255.255.0
undo dcn
undo dcn mode vlan

interface LoopBack0
ip address 2.2.2.2 255.255.255.255
ospf prefix-sid index 100 //node sid全局唯一

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

ipv4-family vpn-instance vpn
peer 172.16.0.2 as-number 65001

ospf 1
opaque-capability enable //启用10类扩展路由
segment-routing mpls //用mpls方式分配标签
segment-routing global-block 16000 23999 //设置SRGB范围，建议都配置相同范围
area 0.0.0.0
network 0.0.0.0 255.255.255.255

p

[p]dis current-configuration

mpls lsr-id 3.3.3.3

mpls

segment-routing

interface Ethernet1/0/0
undo shutdown
ip address 10.0.23.3 255.255.255.0
undo dcn
undo dcn mode vlan

interface Ethernet1/0/1
undo shutdown
ip address 10.0.34.3 255.255.255.0
undo dcn
undo dcn mode vlan

interface LoopBack0
ip address 3.3.3.3 255.255.255.255
ospf prefix-sid index 200

interface NULL0

bgp 100
peer 2.2.2.2 as-number 100
peer 2.2.2.2 connect-interface LoopBack0
peer 4.4.4.4 as-number 100
peer 4.4.4.4 connect-interface LoopBack0

ipv4-family unicast
undo synchronization
peer 2.2.2.2 enable
peer 4.4.4.4 enable

ipv4-family vpnv4
undo policy vpn-target
peer 2.2.2.2 enable
peer 2.2.2.2 reflect-client
peer 4.4.4.4 enable
peer 4.4.4.4 reflect-client

ospf 1
opaque-capability enable
segment-routing mpls
segment-routing global-block 16000 23999
area 0.0.0.0
network 0.0.0.0 255.255.255.255

pe2

[pe2]dis current-configuration

ip vpn-instance vpn
ipv4-family
route-distinguisher 100:200
vpn-target 1:1 export-extcommunity
vpn-target 1:1 import-extcommunity

mpls lsr-id 4.4.4.4

mpls

segment-routing

interface Ethernet1/0/0
undo shutdown
ip binding vpn-instance vpn
ip address 192.168.0.1 255.255.255.0
undo dcn
undo dcn mode vlan

interface Ethernet1/0/1
undo shutdown
ip address 10.0.34.4 255.255.255.0
undo dcn
undo dcn mode vlan

interface LoopBack0
ip address 4.4.4.4 255.255.255.255
ospf prefix-sid index 300

interface NULL0

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

ipv4-family vpn-instance vpn
peer 192.168.0.2 as-number 65002

ospf 1
opaque-capability enable
segment-routing mpls
segment-routing global-block 16000 23999
area 0.0.0.0
network 0.0.0.0 255.255.255.255

如果路ldp又跑sr-mpls be，默认走ldp隧道，让其优先走sr-mpls be隧道，要用策略引：
tunnel-policy p1 //先定义策略
tunnel select-seq sr-lsp load-balance-number 2

ip vpn-instance vpn //在vpn实例中引用
ipv4-family
tnl-policy p1 调用策略

查看

[pe1]dis segment-routing prefix mpls forwarding //查看标签等信息

[pe1]dis tunnel-info all //查看隧道

[pe1]dis ospf lsdb //查看10类lsa

pe1接口上捉包：48120是mp-bgp的私网标签，和mpls里面那个区别vpn-instance一样