配置L3VPN over IS-IS SR-MPLS BE示例

NE20E-S V800R011C10 配置指南 - Segment Routing 02

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配置L3VPN，保证相同VPN用户之间的安全互访。

组网需求

如图2-5所示:

CE1、CE2属于vpna。
vpna使用的VPN-target属性为111:1。

配置L3VPN迭代IS-IS SR-MPLS BE隧道，保证相同VPN用户之间的安全互访。同时由于公网PE之间存在多条链路，要求数据流量在公网能够进行负载分担。

图2-5 L3VPN迭代IS-IS SR-MPLS BE隧道组网图

本例中interface1、interface2、interface3分别代表GE0/1/0、GE0/2/0、GE0/3/0。

配置注意事项

在配置过程中，需注意以下事项：

PE与CE相连的接口绑定了VPN实例后，将删除该接口上已经配置的IP地址、路由协议等三层特性，如果需要应重新配置。

配置思路

采用如下的思路配置L3VPN迭代IS-IS SR-MPLS BE隧道：

骨干网上配置IS-IS实现PE之间的互通。
骨干网上使能MPLS，配置Segment Routing，建立SR LSP。使能TI-LFA FRR。
PE上配置使能IPv4地址族VPN实例，并把与CE相连的接口和相应的VPN实例绑定。
PE之间配置MP-IBGP交换路由信息。
CE与PE之间配置EBGP交换路由信息。

数据准备

为完成此配置例，需准备如下的数据：

PE及P上的MPLS LSR-ID。
vpna的路由属性VPN-Target和RD。
PE及P上的SRGB范围。

操作步骤

配置接口的IP地址。

# 配置PE1。

<HUAWEI> system-view

[~HUAWEI] sysname PE1

[*HUAWEI] commit

[~PE1] interface loopback 1

[*PE1-LoopBack1] ip address 1.1.1.9 32

[*PE1-LoopBack1] quit

[*PE1] interface gigabitethernet0/1/0

[*PE1-GigabitEthernet0/1/0] ip address 172.3.1.1 24

[*PE1-GigabitEthernet0/1/0] quit

[*PE1] interface gigabitethernet0/3/0

[*PE1-GigabitEthernet0/3/0] ip address 172.1.1.1 24

[*PE1-GigabitEthernet0/3/0] quit

[*PE1] commit

# 配置P1。

<HUAWEI> system-view

[~HUAWEI] sysname P1

[*HUAWEI] commit

[~P1] interface loopback 1

[*P1-LoopBack1] ip address 2.2.2.9 32

[*P1-LoopBack1] quit

[*P1] interface gigabitethernet0/1/0

[*P1-GigabitEthernet0/1/0] ip address 172.1.1.2 24

[*P1-GigabitEthernet0/1/0] quit

[*P1] interface gigabitethernet0/2/0

[*P1-GigabitEthernet0/2/0] ip address 172.2.1.1 24

[*P1-GigabitEthernet0/2/0] quit

[*P1] commit

# 配置PE2。

<HUAWEI> system-view

[~HUAWEI] sysname PE2

[*HUAWEI] commit

[~PE2] interface loopback 1

[*PE2-LoopBack1] ip address 3.3.3.9 32

[*PE2-LoopBack1] quit

[*PE2] interface gigabitethernet0/1/0

[*PE2-GigabitEthernet0/1/0] ip address 172.4.1.2 24

[*PE2-GigabitEthernet0/1/0] quit

[*PE2] interface gigabitethernet0/3/0

[*PE2-GigabitEthernet0/3/0] ip address 172.2.1.2 24

[*PE2-GigabitEthernet0/3/0] quit

[*PE2] commit

# 配置P2。

<HUAWEI> system-view

[~HUAWEI] sysname P2

[*HUAWEI] commit

[~P2] interface loopback 1

[*P2-LoopBack1] ip address 4.4.4.9 32

[*P2-LoopBack1] quit

[*P2] interface gigabitethernet0/1/0

[*P2-GigabitEthernet0/1/0] ip address 172.3.1.2 24

[*P2-GigabitEthernet0/1/0] quit

[*P2] interface gigabitethernet0/2/0

[*P2-GigabitEthernet0/2/0] ip address 172.4.1.1 24

[*P2-GigabitEthernet0/2/0] quit

[*P2] commit

在骨干网上配置IGP协议，实现骨干网PE和P的互通。本例中以IS-IS为例进行说明。

# 配置PE1。

[~PE1] isis 1

[*PE1-isis-1] is-level level-1

[*PE1-isis-1] network-entity 10.0000.0000.0001.00

[*PE1-isis-1] quit

[*PE1] commit

[*PE1] interface loopback 1

[*PE1-LoopBack1] isis enable 1

[*PE1-LoopBack1] quit

[*PE1] interface gigabitethernet0/1/0

[*PE1-GigabitEthernet0/1/0] isis enable 1

[*PE1-GigabitEthernet0/1/0] quit

[*PE1] interface gigabitethernet0/3/0

[*PE1-GigabitEthernet0/3/0] isis enable 1

[*PE1-GigabitEthernet0/3/0] quit

[*PE1] commit

# 配置P1。

[~P1] isis 1

[*P1-isis-1] is-level level-1

[*P1-isis-1] network-entity 10.0000.0000.0002.00

[*P1-isis-1] quit

[*P1] commit

[~P1] interface loopback 1

[*P1-LoopBack1] isis enable 1

[*P1-LoopBack1] quit

[*P1] interface gigabitethernet0/1/0

[*P1-GigabitEthernet0/1/0] isis enable 1

[*P1-GigabitEthernet0/1/0] quit

[*P1] interface gigabitethernet0/2/0

[*P1-GigabitEthernet0/2/0] isis enable 1

[*P1-GigabitEthernet0/2/0] quit

[*P1] commit

# 配置PE2。

[~PE2] isis 1

[*PE2-isis-1] is-level level-1

[*PE2-isis-1] network-entity 10.0000.0000.0003.00

[*PE2-isis-1] quit

[*PE2] commit

[~PE2] interface loopback 1

[*PE2-LoopBack1] isis enable 1

[*PE2-LoopBack1] quit

[*PE2] interface gigabitethernet0/3/0

[*PE2-GigabitEthernet0/3/0] isis enable 1

[*PE2-GigabitEthernet0/3/0] quit

[*PE2] interface gigabitethernet0/1/0

[*PE2-GigabitEthernet0/1/0] isis enable 1

[*PE2-GigabitEthernet0/1/0] quit

[*PE2] commit

# 配置P2。

[~P2] isis 1

[*P2-isis-1] is-level level-1

[*P2-isis-1] network-entity 10.0000.0000.0004.00

[*P2-isis-1] quit

[*P2] commit

[~P2] interface loopback 1

[*P2-LoopBack1] isis enable 1

[*P2-LoopBack1] quit

[*P2] interface gigabitethernet0/1/0

[*P2-GigabitEthernet0/1/0] isis enable 1

[*P2-GigabitEthernet0/1/0] quit

[*P2] interface gigabitethernet0/2/0

[*P2-GigabitEthernet0/2/0] isis enable 1

[*P2-GigabitEthernet0/2/0] quit

[*P2] commit

在骨干网上配置MPLS基本能力

# 配置PE1。

[~PE1] mpls lsr-id 1.1.1.9

[*PE1] mpls

[*PE1-mpls] commit

[~PE1-mpls] quit

# 配置P1。

[~P1] mpls lsr-id 2.2.2.9

[*P1] mpls

[*P1-mpls] commit

[~P1-mpls] quit

# 配置PE2。

[~PE2] mpls lsr-id 3.3.3.9

[*PE2] mpls

[*PE2-mpls] commit

[~PE2-mpls] quit

# 配置P2。

[~P2] mpls lsr-id 4.4.4.9

[*P2] mpls

[*P2-mpls] commit

[~P2-mpls] quit

在骨干网上配置Segment Routing，同时使能TI-LFA FRR功能

# 配置PE1。

[~PE1] segment-routing

[*PE1-segment-routing] quit

[*PE1] commit

[~PE1] isis 1

[*PE1-isis-1] cost-style wide

[*PE1-isis-1] segment-routing mpls

[*PE1-isis-1] segment-routing global-block 16000 23999

SRGB取值范围动态变化，具体以设备的实际情况为准。此处仅做示例。

[*PE1-isis-1] frr

[*PE1-isis-1-frr] loop-free-alternate level-1

[*PE1-isis-1-frr] ti-lfa level-1

[*PE1-isis-1-frr] quit

[*PE1-isis-1] quit

[*PE1] interface loopback 1

[*PE1-LoopBack1] isis prefix-sid index 10

[*PE1-LoopBack1] quit

[*PE1] commit

# 配置P1。

[~P1] segment-routing

[*P1-segment-routing] quit

[*P1] commit

[~P1] isis 1

[*P1-isis-1] cost-style wide

[*P1-isis-1] segment-routing mpls

[*P1-isis-1] segment-routing global-block 16000 23999

SRGB取值范围动态变化，具体以设备的实际情况为准。此处仅做示例。

[*P1-isis-1] frr

[*P1-isis-1-frr] loop-free-alternate level-1

[*P1-isis-1-frr] ti-lfa level-1

[*P1-isis-1-frr] quit

[*P1-isis-1] quit

[*P1] interface loopback 1

[*P1-LoopBack1] isis prefix-sid index 20

[*P1-LoopBack1] quit

[*P1] commit

# 配置PE2。

[~PE2] segment-routing

[*PE2-segment-routing] quit

[*PE2] commit

[~PE2] isis 1

[*PE2-isis-1] cost-style wide

[*PE2-isis-1] segment-routing mpls

[*PE2-isis-1] segment-routing global-block 16000 23999

SRGB取值范围动态变化，具体以设备的实际情况为准。此处仅做示例。

[*PE2-isis-1] frr

[*PE2-isis-1-frr] loop-free-alternate level-1

[*PE2-isis-1-frr] ti-lfa level-1

[*PE2-isis-1-frr] quit

[*PE2-isis-1] quit

[*PE2] interface loopback 1

[*PE2-LoopBack1] isis prefix-sid index 30

[*PE2-LoopBack1] quit

[*PE2] commit

# 配置P2。

[~P2] segment-routing

[*P2-segment-routing] quit

[*P2] commit

[~P2] isis 1

[*P2-isis-1] cost-style wide

[*P2-isis-1] segment-routing mpls

[*P2-isis-1] segment-routing global-block 16000 23999

SRGB取值范围动态变化，具体以设备的实际情况为准。此处仅做示例。

[*P2-isis-1] frr

[*P2-isis-1-frr] loop-free-alternate level-1

[*P2-isis-1-frr] ti-lfa level-1

[*P2-isis-1-frr] quit

[*P2-isis-1] quit

[*P2] interface loopback 1

[*P2-LoopBack1] isis prefix-sid index 40

[*P2-LoopBack1] quit

[*P2] commit

# 配置完成后，在PE设备上执行display tunnel-info all命令，可以看到SR LSP已建立。以PE1的显示为例。

[~PE1] display tunnel-info all

Tunnel ID            Type                Destination                             Status
----------------------------------------------------------------------------------------
0x000000002900000003 srbe-lsp            4.4.4.9                                 UP  
0x000000002900000004 srbe-lsp            2.2.2.9                                 UP  
0x000000002900000005 srbe-lsp            3.3.3.9                                 UP

# 在PE1上使用Ping检测SR LSP连通性，例如：

[~PE1] ping lsp segment-routing ip 3.3.3.9 32 version draft2

  LSP PING FEC: SEGMENT ROUTING IPV4 PREFIX 3.3.3.9/32 : 100  data bytes, press CTRL_C to break
    Reply from 3.3.3.9: bytes=100 Sequence=1 time=12 ms
    Reply from 3.3.3.9: bytes=100 Sequence=2 time=5 ms
    Reply from 3.3.3.9: bytes=100 Sequence=3 time=5 ms
    Reply from 3.3.3.9: bytes=100 Sequence=4 time=5 ms
    Reply from 3.3.3.9: bytes=100 Sequence=5 time=5 ms

  --- FEC: SEGMENT ROUTING IPV4 PREFIX 3.3.3.9/32 ping statistics ---
    5 packet(s) transmitted
    5 packet(s) received
    0.00% packet loss
    round-trip min/avg/max = 5/6/12 ms

在PE之间建立MP-IBGP对等体关系

# 配置PE1。

[~PE1] bgp 100

[~PE1-bgp] peer 3.3.3.9 as-number 100

[*PE1-bgp] peer 3.3.3.9 connect-interface loopback 1

[*PE1-bgp] ipv4-family vpnv4

[*PE1-bgp-af-vpnv4] peer 3.3.3.9 enable

[*PE1-bgp-af-vpnv4] commit

[~PE1-bgp-af-vpnv4] quit

[~PE1-bgp] quit

# 配置PE2。

[~PE2] bgp 100

[~PE2-bgp] peer 1.1.1.9 as-number 100

[*PE2-bgp] peer 1.1.1.9 connect-interface loopback 1

[*PE2-bgp] ipv4-family vpnv4

[*PE2-bgp-af-vpnv4] peer 1.1.1.9 enable

[*PE2-bgp-af-vpnv4] commit

[~PE2-bgp-af-vpnv4] quit

[~PE2-bgp] quit

配置完成后，在PE设备上执行display bgp peer或display bgp vpnv4 all peer命令，可以看到PE之间的BGP对等体关系已建立，并达到Established状态。以PE1的显示为例。

[~PE1] display bgp peer

 BGP local router ID : 1.1.1.9
 Local AS number : 100
 Total number of peers : 1          Peers in established state : 1
  Peer            V    AS  MsgRcvd  MsgSent     OutQ  Up/Down    State        PrefRcv
  3.3.3.9         4   100        2        6     0     00:00:12   Established   0

[~PE1] display bgp vpnv4 all peer

 BGP local router ID : 1.1.1.9
 Local AS number : 100
 Total number of peers : 1                 Peers in established state : 1
  Peer            V    AS  MsgRcvd  MsgSent    OutQ  Up/Down    State        PrefRcv
  3.3.3.9         4   100   12      18         0     00:09:38   Established   0

在PE设备上配置使能IPv4地址族的VPN实例，将CE接入PE

# 配置PE1。

[~PE1] ip vpn-instance vpna

[*PE1-vpn-instance-vpna] ipv4-family

[*PE1-vpn-instance-vpna-af-ipv4] route-distinguisher 100:1

[*PE1-vpn-instance-vpna-af-ipv4] vpn-target 111:1 both

[*PE1-vpn-instance-vpna-af-ipv4] quit

[*PE1-vpn-instance-vpna] quit

[*PE1] interface gigabitethernet0/1/0

[*PE1-GigabitEthernet0/1/0] ip binding vpn-instance vpna

[*PE1-GigabitEthernet0/1/0] ip address 10.1.1.2 24

[*PE1-GigabitEthernet0/1/0] quit

[*PE1] commit

# 配置PE2。

[~PE2] ip vpn-instance vpna

[*PE2-vpn-instance-vpna] ipv4-family

[*PE2-vpn-instance-vpna-af-ipv4] route-distinguisher 200:1

[*PE2-vpn-instance-vpna-af-ipv4] vpn-target 111:1 both

[*PE2-vpn-instance-vpna-af-ipv4] quit

[*PE2-vpn-instance-vpna] quit

[*PE2] interface gigabitethernet0/1/0

[*PE2-GigabitEthernet0/1/0] ip binding vpn-instance vpna

[*PE2-GigabitEthernet0/1/0] ip address 10.3.1.2 24

[*PE2-GigabitEthernet0/1/0] quit

[*PE2] commit

# 按图2-5配置各CE的接口IP地址，配置过程请参见后面的配置文件。

配置完成后，在PE设备上执行display ip vpn-instance verbose命令可以看到VPN实例的配置情况。各PE能ping通自己接入的CE。

当PE上有多个绑定了同一个VPN的接口，则使用ping -vpn-instance命令ping对端PE接入的CE时，要指定源IP地址，即要指定ping -vpn-instance vpn-instance-name -a source-ip-address dest-ip-address命令中的参数-a source-ip-address，否则可能ping不通。

在PE设备上配置隧道选择策略，优选SR LSP。

# 配置PE1。

[~PE1] tunnel-policy p1

[*PE1-tunnel-policy-p1] tunnel select-seq sr-lsp load-balance-number 2

[*PE1-tunnel-policy-p1] quit

[*PE1] commit

[~PE1] ip vpn-instance vpna

[*PE1-vpn-instance-vpna] ipv4-family

[*PE1-vpn-instance-vpna-af-ipv4] tnl-policy p1

[*PE1-vpn-instance-vpna-af-ipv4] quit

[*PE1-vpn-instance-vpna] quit

[*PE1] commit

# 配置PE2。

[~PE2] tunnel-policy p1

[*PE2-tunnel-policy-p1] tunnel select-seq sr-lsp load-balance-number 2

[*PE2-tunnel-policy-p1] quit

[*PE2] commit

[~PE2] ip vpn-instance vpna

[*PE2-vpn-instance-vpna] ipv4-family

[*PE2-vpn-instance-vpna-af-ipv4] tnl-policy p1

[*PE2-vpn-instance-vpna-af-ipv4] quit

[*PE2-vpn-instance-vpna] quit

[*PE2] commit

在PE与CE之间建立EBGP对等体关系

# 配置CE1。

[~CE1] interface loopback 1

[*CE1-LoopBack1] ip address 11.1.1.1 32

[*CE1-LoopBack1] quit

[*CE1] interface gigabitethernet0/1/0

[*CE1-GigabitEthernet0/1/0] ip address 10.1.1.1 24

[*CE1-GigabitEthernet0/1/0] quit

[*CE1] bgp 65410

[*CE1-bgp] peer 10.1.1.2 as-number 100

[*CE1-bgp] network 11.1.1.1 32

[*CE1-bgp] quit

[*CE1] commit

CE2的配置与CE1设备配置类似，配置过程请参见后面的配置文件。

# 配置PE1。

[~PE1] bgp 100

[*PE1-bgp] ipv4-family vpn-instance vpna

[*PE1-bgp-vpna] peer 10.1.1.1 as-number 65410

[*PE1-bgp-vpna] commit

[*PE1-bgp-vpna] quit

PE2的配置与PE1类似，配置过程请参见后面的配置文件。

配置完成后，在PE设备上执行display bgp vpnv4 vpn-instance peer命令，可以看到PE与CE之间的BGP对等体关系已建立，并达到Established状态。

以PE1与CE1的对等体关系为例：

[~PE1] display bgp vpnv4 vpn-instance vpna peer

 BGP local router ID : 1.1.1.9
 Local AS number : 100

 VPN-Instance vpna, Router ID 1.1.1.9:
 Total number of peers : 1            Peers in established state : 1
  Peer            V    AS  MsgRcvd  MsgSent    OutQ  Up/Down    State        PrefRcv
  10.1.1.1        4   65410  11     9          0     00:06:37   Established  1

检查配置结果

在PE设备上执行display ip routing-table vpn-instance命令，可以看到去往CE上的Loopback接口路由。

以PE1的显示为例：

[~PE1] display ip routing-table vpn-instance vpna

Route Flags: R - relay, D - download to fib, T - to vpn-instance, B - black hole route
------------------------------------------------------------------------------
Routing Tables: vpna
         Destinations : 7        Routes : 7
Destination/Mask    Proto  Pre  Cost     Flags NextHop         Interface
     10.1.1.0/24    Direct 0    0        D     10.1.1.2        GigabitEthernet0/1/0
     10.1.1.2/32    Direct 0    0        D     127.0.0.1       GigabitEthernet0/1/0
   10.1.1.255/32    Direct 0    0        D     127.0.0.1       GigabitEthernet0/1/0
   11.1.1.1/32     EBGP   255  0        RD    10.1.1.1        GigabitEthernet0/1/0
   22.2.2.2/32     IBGP   255  0        RD    3.3.3.9         GigabitEthernet0/1/0
                    IBGP   255  0        RD    3.3.3.9         GigabitEthernet0/3/0
255.255.255.255/32  Direct 0    0        D     127.0.0.1       InLoopBack0

同一VPN的CE能够相互Ping通，例如：CE1能够Ping通CE2（22.2.2.2）。

[~CE1] ping -a 11.1.1.1 22.2.2.2

  PING 22.2.2.2: 56  data bytes, press CTRL_C to break
    Reply from 22.2.2.2: bytes=56 Sequence=1 ttl=251 time=72 ms
    Reply from 22.2.2.2: bytes=56 Sequence=2 ttl=251 time=34 ms
    Reply from 22.2.2.2: bytes=56 Sequence=3 ttl=251 time=50 ms
    Reply from 22.2.2.2: bytes=56 Sequence=4 ttl=251 time=50 ms
    Reply from 22.2.2.2: bytes=56 Sequence=5 ttl=251 time=34 ms
  --- 22.2.2.2 ping statistics ---
    5 packet(s) transmitted
    5 packet(s) received
    0.00% packet loss
    round-trip min/avg/max = 34/48/72 ms

配置文件

PE1的配置文件

#
sysname PE1
#
ip vpn-instance vpna
 ipv4-family
  route-distinguisher 100:1
  tnl-policy policy1
  vpn-target 111:1 export-extcommunity
  vpn-target 111:1 import-extcommunity
#
mpls lsr-id 1.1.1.9
#               
mpls            
#               
segment-routing 
#               
isis 1          
 is-level level-1
 cost-style wide
 network-entity 10.0000.0000.0001.00
 segment-routing mpls
 segment-routing global-block 16000 23999
 frr
  loop-free-alternate level-1
  ti-lfa level-1
#               
interface GigabitEthernet0/1/0
 undo shutdown  
 ip address 172.3.1.1 255.255.255.0
 isis enable 1  
#               
interface GigabitEthernet0/2/0
 undo shutdown  
 ip binding vpn-instance vpna
 ip address 10.1.1.2 255.255.255.0
#               
interface GigabitEthernet0/3/0
 undo shutdown  
 ip address 172.1.1.1 255.255.255.0
 isis enable 1  
#               
interface LoopBack1
 ip address 1.1.1.9 255.255.255.255
 isis enable 1  
 isis prefix-sid index 10
#               
bgp 100         
 peer 3.3.3.9 as-number 100
 peer 3.3.3.9 connect-interface LoopBack1
 #              
 ipv4-family unicast
  undo synchronization
  peer 3.3.3.9 enable
 #              
 ipv4-family vpnv4
  policy vpn-target
  peer 3.3.3.9 enable
 #              
 ipv4-family vpn-instance vpna
  peer 10.1.1.1 as-number 65410
#
tunnel-policy policy1
 tunnel select-seq sr-lsp load-balance-number 2
#
return

P1的配置文件

#
sysname P1
#
mpls lsr-id 2.2.2.9
#               
mpls            
#               
segment-routing 
#               
isis 1          
 is-level level-1
 cost-style wide
 network-entity 10.0000.0000.0002.00
 segment-routing mpls
 segment-routing global-block 16000 23999
 frr
  loop-free-alternate level-1
  ti-lfa level-1
#               
interface GigabitEthernet0/1/0
 undo shutdown  
 ip address 172.1.1.2 255.255.255.0
 isis enable 1  
#               
interface GigabitEthernet0/2/0
 undo shutdown  
 ip address 172.2.1.1 255.255.255.0
 isis enable 1  
#               
interface LoopBack1
 ip address 2.2.2.9 255.255.255.255
 isis enable 1  
 isis prefix-sid index 20
#
return

PE2的配置文件

#
sysname PE2
#
ip vpn-instance vpna
 ipv4-family
  route-distinguisher 200:1
  tnl-policy policy1
  vpn-target 111:1 export-extcommunity
  vpn-target 111:1 import-extcommunity
#
mpls lsr-id 3.3.3.9
#               
mpls            
#               
segment-routing 
#               
isis 1          
 is-level level-1
 cost-style wide
 network-entity 10.0000.0000.0003.00
 segment-routing mpls
 segment-routing global-block 16000 23999
 frr
  loop-free-alternate level-1
  ti-lfa level-1
#               
interface GigabitEthernet0/1/0
 undo shutdown  
 ip address 172.4.1.2 255.255.255.0
 isis enable 1  
#               
interface GigabitEthernet0/2/0
 undo shutdown  
 ip binding vpn-instance vpna
 ip address 10.2.1.2 255.255.255.0
#               
interface GigabitEthernet0/3/0
 undo shutdown  
 ip address 172.2.1.2 255.255.255.0
 isis enable 1  
#               
interface LoopBack1
 ip address 3.3.3.9 255.255.255.255
 isis enable 1  
 isis prefix-sid index 30
#               
bgp 100         
 peer 1.1.1.9 as-number 100
 peer 1.1.1.9 connect-interface LoopBack1
 #              
 ipv4-family unicast
  undo synchronization
  peer 1.1.1.9 enable
 #              
 ipv4-family vpnv4
  policy vpn-target
  peer 1.1.1.9 enable
 #              
 ipv4-family vpn-instance vpna
  peer 10.2.1.1 as-number 65420
#
tunnel-policy policy1
 tunnel select-seq sr-lsp load-balance-number 2
#
return

P2的配置文件

#
sysname P2
#
mpls lsr-id 4.4.4.9
#               
mpls            
#               
segment-routing 
#               
isis 1          
 is-level level-1
 cost-style wide
 network-entity 10.0000.0000.0004.00
 segment-routing mpls
 segment-routing global-block 16000 23999
 frr
  loop-free-alternate level-1
  ti-lfa level-1
#               
interface GigabitEthernet0/1/0
 undo shutdown  
 ip address 172.3.1.2 255.255.255.0
 isis enable 1  
#               
interface GigabitEthernet0/2/0
 undo shutdown  
 ip address 172.4.1.1 255.255.255.0
 isis enable 1  
#               
interface LoopBack1
 ip address 4.4.4.9 255.255.255.255
 isis enable 1  
 isis prefix-sid index 40
#
return

CE1的配置文件

#
 sysname CE1
#
interface GigabitEthernet0/1/0
 undo shutdown
 ip address 10.1.1.1 255.255.255.0
#
interface LoopBack1
 ip address 11.1.1.1 255.255.255.255
#
bgp 65410
 peer 10.1.1.2 as-number 100
 network 11.1.1.1 255.255.255.255
 #
 ipv4-family unicast
  peer 10.1.1.2 enable
#
return

CE2的配置文件

#
 sysname CE2
#
interface GigabitEthernet0/1/0
 undo shutdown
 ip address 10.2.1.1 255.255.255.0
#
interface LoopBack1
 ip address 22.2.2.2 255.255.255.255
#
bgp 65420
 peer 10.2.1.2 as-number 100
 network 22.2.2.2 255.255.255.255
 #
 ipv4-family unicast
  peer 10.2.1.2 enable
#
return

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更新时间：2020-02-07

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