华为NE40E路由器实验配置示例 | 配置L3VdPdNd over OSPF SR-MPLS BE

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组网需求

如图1所示:

  • CE1、CE2属于vpna。

  • vpna使用的VPN-target属性为111:1。

配置L3VPN迭代OSPF 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1 L3VPN迭代OSPF SR-MPLS BE隧道组网图

配置思路

  1. 骨干网上配置OSPF实现PE之间的互通。

  2. 骨干网上使能MPLS，配置Segment Routing，建立SR LSP。使能TI-LFA FRR。

  3. 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。

  4. PE之间配置MP-IBGP交换路由信息。

  5. CE与PE之间配置EBGP交换路由信息。

操作步骤

1. 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 gigabitethernet1/0/0
[*PE1-GigabitEthernet1/0/0] ip address 172.18.1.1 24
[*PE1-GigabitEthernet1/0/0] quit
[*PE1] interface gigabitethernet3/0/0
[*PE1-GigabitEthernet3/0/0] ip address 172.16.1.1 24
[*PE1-GigabitEthernet3/0/0] 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 gigabitethernet1/0/0
[*P1-GigabitEthernet1/0/0] ip address 172.16.1.2 24
[*P1-GigabitEthernet1/0/0] quit
[*P1] interface gigabitethernet2/0/0
[*P1-GigabitEthernet2/0/0] ip address 172.17.1.1 24
[*P1-GigabitEthernet2/0/0] 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 gigabitethernet1/0/0
[*PE2-GigabitEthernet1/0/0] ip address 172.19.1.2 24
[*PE2-GigabitEthernet1/0/0] quit
[*PE2] interface gigabitethernet3/0/0
[*PE2-GigabitEthernet3/0/0] ip address 172.17.1.2 24
[*PE2-GigabitEthernet3/0/0] 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 gigabitethernet1/0/0
[*P2-GigabitEthernet1/0/0] ip address 172.18.1.2 24
[*P2-GigabitEthernet1/0/0] quit
[*P2] interface gigabitethernet2/0/0
[*P2-GigabitEthernet2/0/0] ip address 172.19.1.1 24
[*P2-GigabitEthernet2/0/0] quit
[*P2] commit

2. 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OSPF为例进行说明

# 配置PE1。

[~PE1] ospf 1
[*PE1-ospf-1] opaque-capability enable
[*PE1-ospf-1] area 0
[*PE1-ospf-1-area-0.0.0.0] quit
[*PE1-ospf-1] quit
[*PE1] interface loopback 1
[*PE1-LoopBack1] ospf enable 1 area 0
[*PE1-LoopBack1] quit
[*PE1] interface gigabitethernet1/0/0
[*PE1-GigabitEthernet1/0/0] ospf enable 1 area 0
[*PE1-GigabitEthernet1/0/0] quit
[*PE1] interface gigabitethernet3/0/0
[*PE1-GigabitEthernet3/0/0] ospf enable 1 area 0
[*PE1-GigabitEthernet3/0/0] quit
[*PE1] commit

# 配置P1。

[~P1] ospf 1
[*P1-ospf-1] opaque-capability enable
[*P1-ospf-1] area 0
[*P1-ospf-1-area-0.0.0.0] quit
[*P1-ospf-1] quit
[*P1] interface loopback 1
[*P1-LoopBack1] ospf enable 1 area 0
[*P1-LoopBack1] quit
[*P1] interface gigabitethernet1/0/0
[*P1-GigabitEthernet1/0/0] ospf enable 1 area 0
[*P1-GigabitEthernet1/0/0] quit
[*P1] interface gigabitethernet2/0/0
[*P1-GigabitEthernet2/0/0] ospf enable 1 area 0
[*P1-GigabitEthernet2/0/0] quit
[*P1] commit

# 配置PE2。

[~PE2] ospf 1
[*PE2-ospf-1] opaque-capability enable
[*PE2-ospf-1] area 0
[*PE2-ospf-1-area-0.0.0.0] quit
[*PE2-ospf-1] quit
[*PE2] interface loopback 1
[*PE2-LoopBack1] ospf enable 1 area 0
[*PE2-LoopBack1] quit
[*PE2] interface gigabitethernet3/0/0
[*PE2-GigabitEthernet3/0/0] ospf enable 1 area 0
[*PE2-GigabitEthernet3/0/0] quit
[*PE2] interface gigabitethernet1/0/0
[*PE2-GigabitEthernet1/0/0] ospf enable 1 area 0
[*PE2-GigabitEthernet1/0/0] quit
[*PE2] commit

# 配置P2。

[~P2] ospf 1
[*P2-ospf-1] opaque-capability enable
[*P2-ospf-1] area 0
[*P2-ospf-1-area-0.0.0.0] quit
[*P2-ospf-1] quit
[*P2] interface loopback 1
[*P2-LoopBack1] ospf enable 1 area 0
[*P2-LoopBack1] quit
[*P2] interface gigabitethernet1/0/0
[*P2-GigabitEthernet1/0/0] ospf enable 1 area 0
[*P2-GigabitEthernet1/0/0] quit
[*P2] interface gigabitethernet2/0/0
[*P2-GigabitEthernet2/0/0] ospf enable 1 area 0
[*P2-GigabitEthernet2/0/0] quit
[*P2] commit

3. （可选）在骨干网上配置MPLS基本能力

当接口下使能OSPF功能后，接口自动使能MPLS能力，所以也可以忽略此步骤。

# 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

4. 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] ospf 1
[*PE1-ospf-1] segment-routing mpls
[*PE1-ospf-1] segment-routing global-block 16000 23999
[*PE1-ospf-1] frr
[*PE1-ospf-1-frr] loop-free-alternate
[*PE1-ospf-1-frr] ti-lfa enable
[*PE1-ospf-1-frr] quit
[*PE1-ospf-1] quit
[*PE1] interface loopback 1
[*PE1-LoopBack1] ospf prefix-sid index 10
[*PE1-LoopBack1] quit
[*PE1] commit

# 配置P1。

[~P1] segment-routing
[*P1-segment-routing] quit
[*P1] ospf 1
[*P1-ospf-1] segment-routing mpls
[*P1-ospf-1] segment-routing global-block 16000 23999
[*P1-ospf-1] frr
[*P1-ospf-1-frr] loop-free-alternate
[*P1-ospf-1-frr] ti-lfa enable
[*P1-ospf-1-frr] quit
[*P1-ospf-1] quit
[*P1] interface loopback 1
[*P1-LoopBack1] ospf prefix-sid index 20
[*P1-LoopBack1] quit
[*P1] commit

# 配置PE2。

[~PE2] segment-routing
[*PE2-segment-routing] quit
[*PE2] ospf 1
[*PE2-ospf-1] segment-routing mpls
[*PE2-ospf-1] segment-routing global-block 16000 23999
[*PE2-ospf-1] frr
[*PE2-ospf-1-frr] loop-free-alternate
[*PE2-ospf-1-frr] ti-lfa enable
[*PE2-ospf-1-frr] quit
[*PE2-ospf-1] quit
[*PE2] interface loopback 1
[*PE2-LoopBack1] ospf prefix-sid index 30
[*PE2-LoopBack1] quit
[*PE2] commit

# 配置P2。

[~P2] segment-routing
[*P2-segment-routing] quit
[*P2] ospf 1
[*P2-ospf-1] segment-routing mpls
[*P2-ospf-1] segment-routing global-block 16000 23999
[*P2-ospf-1] frr
[*P2-ospf-1-frr] loop-free-alternate
[*P2-ospf-1-frr] ti-lfa enable
[*P2-ospf-1-frr] quit
[*P2-ospf-1] quit
[*P2] interface loopback 1
[*P2-LoopBack1] ospf 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=256 ms
    Reply from 3.3.3.9: bytes=100 Sequence=2 time=3 ms
    Reply from 3.3.3.9: bytes=100 Sequence=3 time=4 ms
    Reply from 3.3.3.9: bytes=100 Sequence=4 time=4 ms
    Reply from 3.3.3.9: bytes=100 Sequence=5 time=4 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 = 3/54/256 ms

5. 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        5        5     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   1

6. 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 gigabitethernet2/0/0
[*PE1-GigabitEthernet2/0/0] ip binding vpn-instance vpna
[*PE1-GigabitEthernet2/0/0] ip address 10.1.1.2 24
[*PE1-GigabitEthernet2/0/0] 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 gigabitethernet2/0/0
[*PE2-GigabitEthernet2/0/0] ip binding vpn-instance vpna
[*PE2-GigabitEthernet2/0/0] ip address 10.2.1.2 24
[*PE2-GigabitEthernet2/0/0] quit
[*PE2] commit

# 按图1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。

7. 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

8. 在PE与CE之间建立EBGP对等体关系

# 配置CE1。

<HUAWEI> system-view
[~HUAWEI] sysname CE1
[*HUAWEI] commit
[~CE1] interface loopback 1
[*CE1-LoopBack1] ip address 10.11.1.1 32
[*CE1-LoopBack1] quit
[*CE1] interface gigabitethernet1/0/0
[*CE1-GigabitEthernet1/0/0] ip address 10.1.1.1 24
[*CE1-GigabitEthernet1/0/0] quit
[*CE1] bgp 65410
[*CE1-bgp] peer 10.1.1.2 as-number 100
[*CE1-bgp] network 10.11.1.1 32
[*CE1-bgp] quit
[*CE1] commit

# 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
[~PE1-bgp] quit

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  19     18         0     00:12:39   Established  1

9. 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 Table: 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        GigabitEthernet1/0/0
     10.1.1.2/32    Direct 0    0        D     127.0.0.1       GigabitEthernet1/0/0
   10.1.1.255/32    Direct 0    0        D     127.0.0.1       GigabitEthernet1/0/0
   10.11.1.1/32     EBGP   255  0        RD    10.1.1.1        GigabitEthernet1/0/0
   10.22.2.2/32     IBGP   255  0        RD    3.3.3.9         GigabitEthernet1/0/0
                    IBGP   255  0        RD    3.3.3.9         GigabitEthernet3/0/0
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（10.22.2.2）。

[~CE1] ping -a 10.11.1.1 10.22.2.2
  PING 10.22.2.2: 56  data bytes, press CTRL_C to break
    Reply from 10.22.2.2: bytes=56 Sequence=1 ttl=252 time=428 ms
    Reply from 10.22.2.2: bytes=56 Sequence=2 ttl=252 time=4 ms
    Reply from 10.22.2.2: bytes=56 Sequence=3 ttl=252 time=5 ms
    Reply from 10.22.2.2: bytes=56 Sequence=4 ttl=252 time=3 ms
    Reply from 10.22.2.2: bytes=56 Sequence=5 ttl=252 time=4 ms

  --- 10.22.2.2 ping statistics ---
    5 packet(s) transmitted
    5 packet(s) received
    0.00% packet loss
    round-trip min/avg/max = 3/88/428 ms

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