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NE40E V800R010C00 配置指南 - 用户接入 01

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配置在L3VPN上建立L2TP隧道的用户接入示例

配置在L3VPN上建立L2TP隧道的用户接入示例

介绍一个在L3VPN上建立L2TP隧道的配置示例,结合配置组网图来理解业务的配置过程。配置示例包括组网需求、思路准备、操作步骤和配置文件。

组网需求

图10-15所示,DeviceA和DeviceB作为MPLS骨干网的PE设备,同时DeviceA作为LAC,DeviceB作为LNS,在VPN上建立L2TP隧道。LoopBack0属于vrf1,LoopBack1属于vrf2。

图10-15  在L3VPN上建立L2TP隧道的用户接入组网图
说明:

本例中interface1、interface2代表GE 2/0/0.100、GE 3/0/0



设备 接口 IP地址
DeviceA GigabitEthernet3/0/0 172.16.1.1/24
  LoopBack0 10.1.1.3/24
  LoopBack1 10.2.1.3/24
  LoopBack2 1.1.1.9/32
  lsr-id 1.1.1.9
DeviceB GigabitEthernet3/0/0 172.16.1.2/24
  LoopBack0 10.3.1.3/24
  LoopBack1 10.4.1.3/24
  LoopBack2 2.2.2.9/32
  lsr-id 2.2.2.9

配置思路

  1. 骨干网中建立MPLS VPN网络

  2. 创建L2TP隧道的接口与VPN实例绑定

  3. 在用户侧进行拨号配置

  4. 配置LAC

  5. 配置LNS

数据准备

为完成此配置例,需准备如下的数据:

  • PE的MPLS LSR ID为各自Loopback2的IP地址

  • PC1用户名、口令;PC2用户名、口令

  • 隧道的密码、LNS侧本端名称和远端名称

  • VPN-instance

  • 两个虚拟接口模板编号及两个L2TP组编号

  • 远端地址池编号、范围及掩码

操作步骤

  1. 用户侧的配置

    建立一个拨号网络,号码为DeviceA的接入号码,接收由LNS服务器端分配的地址。

    对于PC1而言,在弹出的拨号终端窗口中输入用户名user1@isp1,口令(此用户名与口令已在LNS中注册)。

    对于PC2而言,在弹出的拨号终端窗口中输入用户名use1@isp2,口令(此用户名与口令已在LNS中注册)。

  2. DeviceA(LAC侧)的配置

    # 配置虚模板接口1。

    <Device> system-view
    [~Device] sysname DeviceA
    [*DeviceA] interface virtual-template 1
    [*DeviceA-Virtual-Template1] ppp authentication-mode chap
    [*DeviceA-Virtual-Template1] commit
    [~DeviceA-Virtual-Template1] quit

    # 在GE 2/0/0.100接口上绑定虚模板接口1。

    [~DeviceA] interface gigabitethernet 2/0/0.100
    [*DeviceA-GigabitEthernet2/0/0.100] pppoe-server bind virtual-template 1
    [*DeviceA-GigabitEthernet2/0/0.100] user-vlan 1 100
    [*DeviceA-GigabitEthernet2/0/0.100-vlan-1-100] commit
    [~DeviceA-GigabitEthernet2/0/0.100-vlan-1-100] quit

    # 配置BAS接口。

    [~DeviceA-GigabitEthernet2/0/0.100] bas
    [*DeviceA-GigabitEthernet2/0/0.100-bas] access-type layer2-subscriber
    [*DeviceA-GigabitEthernet2/0/0.100-bas] authentication-method ppp
    [*DeviceA-GigabitEthernet2/0/0.100-bas] commit
    [~DeviceA-GigabitEthernet2/0/0.100-bas] quit
    [~DeviceA-GigabitEthernet2/0/0.100] quit

    # 创建VPN-instance。

    [~DeviceA] ip vpn-instance vrf1
    [*DeviceA-vpn-instance-vrf1] route-distinguisher 100:1
    [*DeviceA-vpn-instance-vrf1] vpn-target 100:1 both
    [*DeviceA-vpn-instance-vrf1] commit
    [~DeviceA-vpn-instance-vrf1] quit
    [~DeviceA] ip vpn-instance vrf2
    [*DeviceA-vpn-instance-vrf2] route-distinguisher 100:2
    [*DeviceA-vpn-instance-vrf2] vpn-target 100:2 both
    [*DeviceA-vpn-instance-vrf2] commit
    [~DeviceA-vpn-instance-vrf2] quit

    # 创建环回接口。

    [~DeviceA] interface loopback0
    [*DeviceA-LoopBack0] ip binding vpn-instance vrf1
    [*DeviceA-LoopBack0] ip address 10.1.1.3 255.255.255.0
    [*DeviceA-LoopBack0] commit
    [~DeviceA-LoopBack0] quit
    [~DeviceA] interface loopback1
    [*DeviceA-LoopBack1] ip binding vpn-instance vrf2
    [*DeviceA-LoopBack1] ip address 10.2.1.3 255.255.255.0
    [*DeviceA-LoopBack1] commit
    [~DeviceA-LoopBack1] quit

    # 设置L2TP组并配置相关属性。

    [~DeviceA] l2tp enable
    [~DeviceA] l2tp-group lac1
    [*DeviceA-l2tp-lac1] tunnel name lac1
    [*DeviceA-l2tp-lac1] start l2tp ip 10.3.1.3
    [*DeviceA-l2tp-lac1] tunnel authentication
    [*DeviceA-l2tp-lac1] tunnel password simple 1qaz#EDC
    [*DeviceA-l2tp-lac1] tunnel source loopback0
    [*DeviceA-l2tp-lac1] commit
    [~DeviceA-l2tp-lac1] quit
    [~DeviceA] l2tp-group lac2
    [*DeviceA-l2tp-lac2] tunnel name lac2
    [*DeviceA-l2tp-lac2] start l2tp ip 10.4.1.3
    [*DeviceA-l2tp-lac2] tunnel authentication
    [*DeviceA-l2tp-lac2] tunnel password simple 1qaz#EDC
    [*DeviceA-l2tp-lac2] tunnel source loopback1
    [*DeviceA-l2tp-lac2] commit
    [~DeviceA-l2tp-lac2] quit

    # LAC1配置RADIUS服务器。

    [~DeviceA] radius-server group radius1
    [*DeviceA-radius-radius1] radius-server authentication 10.0.0.249 1812
    [*DeviceA-radius-radius1] radius-server accounting 10.0.0.249 1813
    [*DeviceA-radius-radius1] radius-server shared-key itellin
    [*DeviceA-radius-radius1] commit
    [~DeviceA-radius-radius1] quit

    # LAC1配置用户所在域。

    [~DeviceA] aaa
    [*DeviceA-aaa] domain isp1
    [*DeviceA-aaa-domain-isp1] l2tp-group lac1
    [*DeviceA-aaa-domain-isp1] radius-server group radius1
    [*DeviceA-aaa-domain-isp1] authentication-scheme default1
    [*DeviceA-aaa-domain-isp1] accounting-scheme default1
    [*DeviceA-aaa-domain-isp1] commit
    [~DeviceA-aaa-domain-isp1] quit
    [~DeviceA-aaa] domain isp2
    [*DeviceA-aaa-domain-isp2] l2tp-group lac2
    [*DeviceA-aaa-domain-isp2] radius-server group radius1
    [*DeviceA-aaa-domain-isp2] authentication-scheme default1
    [*DeviceA-aaa-domain-isp2] accounting-scheme default1
    [*DeviceA-aaa-domain-isp2] commit
    [~DeviceA-aaa-domain-isp2] quit
    [~DeviceA-aaa] quit

  3. DeviceB(LNS侧)的配置

    # 创建两个VPN-instance。

    [~DeviceB] ip vpn-instance vrf1
    [*DeviceB-vpn-instance-vrf1] route-distinguisher 100:1
    [*DeviceB-vpn-instance-vrf1] vpn-target 100:1 both
    [*DeviceB-vpn-instance-vrf1] commit
    [~DeviceB-vpn-instance-vrf1] quit
    [~DeviceB] ip vpn-instance vrf2
    [*DeviceB-vpn-instance-vrf2] route-distinguisher 100:2
    [*DeviceB-vpn-instance-vrf2] vpn-target 100:2 both
    [*DeviceB-vpn-instance-vrf2] commit
    [~DeviceB-vpn-instance-vrf2] quit

    # 创建环回接口。

    [~DeviceB] interface loopback0
    [*DeviceB-LoopBack0] ip binding vpn-instance vrf1
    [*DeviceB-LoopBack0] ip address 10.3.1.3 255.255.255.0
    [*DeviceB-LoopBack0] commit
    [~DeviceB-LoopBack0] quit
    [*DeviceB] interface loopback1
    [*DeviceB-LoopBack1] ip binding vpn-instance vrf2
    [*DeviceB-LoopBack1] ip address 10.4.1.3 255.255.255.0
    [*DeviceB-LoopBack1] commit
    [~DeviceB-LoopBack1] quit

    # 创建虚模板接口1。

    [~DeviceB] interface virtual-template 1
    [*DeviceB-Virtual-Template1] ppp authentication-mode chap
    [*DeviceB-Virtual-Template1] commit
    [~DeviceB-Virtual-Template1] quit

    # 使能L2TP服务,并配置L2TP组。

    [~DeviceB] l2tp enable
    [~DeviceB] l2tp-group lns1
    [*DeviceB-l2tp-lns1] tunnel name lns1
    [*DeviceB-l2tp-lns1] allow l2tp virtual-template 1 remote lac1
    [*DeviceB-l2tp-lns1] tunnel authentication
    [*DeviceB-l2tp-lns1] tunnel password simple 1qaz#EDC
    [*DeviceB-l2tp-lns1] commit
    [~DeviceB-l2tp-lns1] quit
    [~DeviceB] l2tp-group lns2
    [*DeviceB-l2tp-lns1] tunnel name lns2
    [*DeviceB-l2tp-lns1] allow l2tp virtual-template 1 remote lac2
    [*DeviceB-l2tp-lns1] tunnel authentication
    [*DeviceB-l2tp-lns1] tunnel password simple 1qaz#EDC
    [*DeviceB-l2tp-lns1] commit
    [~DeviceB-l2tp-lns1] quit

    # 创建并配置LNS组group1,绑定隧道源接口和隧道板。

    [~DeviceB] lns-group group1
    [*DeviceB-lns-group-group1] bind slot 1 
    [*DeviceB-lns-group-group1] bind source LoopBack0
    [*DeviceB-lns-group-group1] bind source LoopBack1
    [*DeviceB-lns-group-group1] commit
    [~DeviceB-lns-group-group1] quit

    # 配置给用户分配的地址池。

    [~DeviceB] ip pool pool1 bas local
    [*DeviceB-ip-pool-pool1] gateway 192.168.0.1 255.255.255.0
    [*DeviceB-ip-pool-pool1] section 0 192.168.0.10 192.168.0.100
    [*DeviceB-ip-pool-pool1] commit
    [~DeviceB-ip-pool-pool1] quit
    [~DeviceB] ip pool pool2 bas local
    [*DeviceB-ip-pool-pool2] gateway 172.30.0.1 255.255.255.0
    [*DeviceB-ip-pool-pool2] section 0 172.30.0.10 172.30.0.100
    [*DeviceB-ip-pool-pool2] commit
    [~DeviceB-ip-pool-pool2] quit

    # 配置RADIUS服务器。

    [~DeviceB] radius-server group radius1
    [*DeviceB-radius-radius1] radius-server authentication 20.20.20.1 1812
    [*DeviceB-radius-radius1] radius-server accounting 20.20.20.1 1813
    [*DeviceB-radius-radius1] radius-server shared-key itellin
    [*DeviceB-radius-radius1] commit
    [~DeviceB-radius-radius1] quit

    # 配置用户所在域。

    [~DeviceB] aaa
    [*DeviceB-aaa] domain isp1
    [*DeviceB-aaa-domain-isp1] radius-server group radius1
    [*DeviceB-aaa-domain-isp1] authentication-scheme default1
    [*DeviceB-aaa-domain-isp1] accounting-scheme default1
    [*DeviceB-aaa-domain-isp1] ip-pool pool1
    [*DeviceB-aaa-domain-isp1] commit
    [~DeviceB-aaa-domain-isp1] quit
    [~DeviceB-aaa] domain isp2
    [*DeviceB-aaa-domain-isp2] radius-server group radius1
    [*DeviceB-aaa-domain-isp2] authentication-scheme default1
    [*DeviceB-aaa-domain-isp2] accounting-scheme default1
    [*DeviceB-aaa-domain-isp2] ip-pool pool2
    [*DeviceB-aaa-domain-isp2] commit
    [~DeviceB-aaa-domain-isp2] quit
    [~DeviceB-aaa] quit

  4. 检查配置结果

    # LAC与LNS间建立L2TP隧道的接口路由应连通。

    [~DeviceA] ping -vpn-instance vrf1 10.3.1.3
    PING 10.3.1.3: 56  data bytes, press CTRL_C to break                           
        Reply from 10.3.1.3: bytes=56 Sequence=1 ttl=255 time=12 ms                  
        Reply from 10.3.1.3: bytes=56 Sequence=2 ttl=255 time=10 ms                  
        Reply from 10.3.1.3: bytes=56 Sequence=3 ttl=255 time=5 ms                   
        Reply from 10.3.1.3: bytes=56 Sequence=4 ttl=255 time=8 ms                   
                                                                                    
      --- 10.3.1.3 ping statistics ---                                               
        4 packet(s) transmitted                                                     
        4 packet(s) received                                                        
        0.00% packet loss                                                           
        round-trip min/avg/max = 5/8/12 ms                           
    [~DeviceA] ping -vpn-instance vrf2 10.4.1.3
    PING 10.4.1.3: 56  data bytes, press CTRL_C to break                           
        Reply from 10.4.1.3: bytes=56 Sequence=1 ttl=255 time=12 ms                  
        Reply from 10.4.1.3: bytes=56 Sequence=2 ttl=255 time=10 ms                  
        Reply from 10.4.1.3: bytes=56 Sequence=3 ttl=255 time=5 ms                   
        Reply from 10.4.1.3: bytes=56 Sequence=4 ttl=255 time=8 ms                   
                                                                                    
      --- 10.4.1.3 ping statistics ---                                               
        4 packet(s) transmitted                                                     
        4 packet(s) received                                                        
        0.00% packet loss                                                           
        round-trip min/avg/max = 5/8/12 ms                           

    # L2TP用户能够正常上线。

配置文件

  • DeviceA的配置文件

    #
     sysname DeviceA
    #
     mpls lsr-id 1.1.1.9
     mpls
      lsp-trigger all
    #
    mpls ldp
    #
    radius-server group radius1
     radius-server authentication 10.0.0.249 1812 
     radius-server accounting 10.0.0.249 1813 
     radius-server shared-key itellin
    #
    ip vpn-instance vrf1
    route-distinguisher 100:1
     vpn-target 100:1 export-extcommunity
     vpn-target 100:1 import-extcommunity
    #
    ip vpn-instance vrf2
    route-distinguisher 200:1
     vpn-target 200:1 export-extcommunity
     vpn-target 200:1 import-extcommunity
    #
    l2tp-group lac1
     tunnel password simple 1qaz#EDC
     tunnel name lac1
     start l2tp ip 10.3.1.3
     tunnel source LoopBack0
    l2tp-group lac2
     tunnel password simple 1qaz#EDC
     tunnel name lac2
     start l2tp ip 10.4.1.3
     tunnel source LoopBack1
    #
    aaa
    domain isp1
      authentication-scheme default1
      accounting-scheme default1
      radius-server group radius1
      l2tp-group lac1
    domain isp2
      authentication-scheme default1
      accounting-scheme default1
      radius-server group radius1
      l2tp-group lac2
    #
    interface Virtual-Template1
    ppp authentication-mode chap
    #
    interface GigabitEthernet2/0/0
     undo shutdown 
    #
    interface GigabitEthernet2/0/0.100
     undo shutdown
     pppoe-server bind Virtual-Template 1
     user-vlan 1 100
     bas
      access-type layer2-subscriber
    #
    interface GigabitEthernet3/0/0
     undo shutdown
    ip address 172.16.1.1 255.255.255.0
     mpls
     mpls ldp
    #
    interface LoopBack0
     ip binding vpn-instance vrf1
     ip address 10.1.1.3 255.255.255.0
    #
    interface LoopBack1
     ip binding vpn-instance vrf2
     ip address 10.2.1.3 255.255.255.0
    #
    interface LoopBack2
     ip address 1.1.1.9 255.255.255.255
    #
    bgp 100
     peer 2.2.2.9 as-number 100
     peer 2.2.2.9 connect-interface LoopBack2
    #
     ipv4-family unicast
      undo synchronization
      peer 2.2.2.9 enable
    #
     ipv4-family vpnv4
      policy vpn-target
      peer 2.2.2.9 enable
     #
     ipv4-family vpn-instance vrf1
      import-route direct
      import-route unr
     #
     ipv4-family vpn-instance vrf2
      import-route direct
      import-route unr
    #
    ospf 1
     area 0.0.0.0
      network 172.16.1.0 0.0.0.255
      network 1.1.1.9 0.0.0.0
    #
    return
  • DeviceB的配置文件

    #
     sysname DeviceB
    #
     mpls lsr-id 2.2.2.9
     mpls
      lsp-trigger all
    #
    mpls ldp
    #
    radius-server group radius1
     radius-server authentication 20.20.20.1 1812 
     radius-server accounting 20.20.20.1 1813 
     radius-server shared-key itellin
    #
    ip vpn-instance vrf1
    route-distinguisher 100:1
     vpn-target 100:1 export-extcommunity
     vpn-target 100:1 import-extcommunity
    #
    ip vpn-instance vrf2
    route-distinguisher 100:2
     vpn-target 100:2 export-extcommunity
     vpn-target 100:2 import-extcommunity
    #
    l2tp-group lns1
     allow l2tp virtual-template 1 remote lac1
     tunnel password simple 1qaz#EDC
     tunnel name lns1
    #
    l2tp-group lns2
     allow l2tp virtual-template 1 remote lac2
     tunnel password simple 1qaz#EDC
     tunnel name lns2
    #
    lns-group group1
     bind slot 1 
     bind source LoopBack0
     bind source LoopBack1
    #
    ip pool pool1 bas local
     gateway 192.168.0.1 255.255.255.0
     section 0 192.168.10.2 10.10.0.100
    #
    ip pool pool2  bas local
     gateway 172.30.0.1 255.255.255.0
     section 0 172.30.0.10 10.10.0.100
    #
    aaa
    domain  isp1
      radius-server group  radius1
      authentication-scheme   default1
      accounting-scheme   default1
      ip-pool pool1
    domain  isp2
      radius-server group  radius1
      authentication-scheme   default1
      accounting-scheme   default1
      ip-pool pool2
    #
    interface LoopBack0
     ip binding vpn-instance vrf1
     ip address 10.3.1.3 255.255.255.0
    #
    interface LoopBack1
     ip binding vpn-instance vrf2
     ip address 10.4.1.3 255.255.255.0
    #
    interface LoopBack2
     ip address 2.2.2.9 255.255.255.255
    #
    interface Virtual-Template1
    ppp authentication-mode chap
    #
    interface GigabitEthernet3/0/0
     undo shutdown
     ip address 172.17.1.2 255.255.255.0
      mpls
     mpls ldp
    #
    bgp 100
     peer 1.1.1.9 as-number 100
     peer 1.1.1.9 connect-interface LoopBack2
     #
     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 vrf1
      import-route direct
      import-route unr
     #
     ipv4-family vpn-instance vrf2
      import-route direct
      import-route unr
    #
    ospf 1
     area 0.0.0.0
      network 172.17.1.0 0.0.0.255
      network 2.2.2.9 0.0.0.0
    #
    return
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