WO2012130049A1 - 地址处理方法及装置 - Google Patents

地址处理方法及装置 Download PDF

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Publication number
WO2012130049A1
WO2012130049A1 PCT/CN2012/072410 CN2012072410W WO2012130049A1 WO 2012130049 A1 WO2012130049 A1 WO 2012130049A1 CN 2012072410 W CN2012072410 W CN 2012072410W WO 2012130049 A1 WO2012130049 A1 WO 2012130049A1
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Prior art keywords
terminal
lns
address
lac
dhcp
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PCT/CN2012/072410
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English (en)
French (fr)
Inventor
高红亮
赵志旺
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华为技术有限公司
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Publication of WO2012130049A1 publication Critical patent/WO2012130049A1/zh

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Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L61/00Network arrangements, protocols or services for addressing or naming
    • H04L61/50Address allocation
    • H04L61/5007Internet protocol [IP] addresses
    • H04L61/5014Internet protocol [IP] addresses using dynamic host configuration protocol [DHCP] or bootstrap protocol [BOOTP]

Definitions

  • L2TP Layer 2 Tunneling Protocol
  • L2TP Access Concentrator L2TP Access Concentrator
  • L2TP Network Server L2TP Network Server
  • the LNS and the terminal are used to transfer information between the LNS and the terminal: the information received from the terminal is encapsulated and sent to the LNS according to the L2TP; the information received from the LNS is decapsulated according to the L2TP and sent to the terminal.
  • the IP address of the terminal is the local IP address allocated by the LNS to the terminal in the local address pool, which increases the configuration complexity of the LNS, thereby reducing the configuration efficiency of the LNS.
  • the present invention provides an address processing method and apparatus, which can reduce the configuration complexity of an LNS and improve the configuration efficiency of an LNS.
  • An embodiment of the present invention provides an address processing method, including:
  • the LNS receives an incoming call request from the LAC, where the incoming call request includes the terminal Establishing, by the LNS, a session corresponding to the terminal between the LAC and the LNS according to the identifier of the terminal;
  • the LNS obtains an IP address of the terminal from a DHCP server by using the terminal identifier
  • the LNS sends the IP address to the terminal through the session.
  • An embodiment of the present invention further provides an LNS, including:
  • a receiving module configured to receive an incoming call request from the LAC, where the request is obtained in the incoming call request;
  • a establishing module configured to establish, according to the terminal identifier, a session corresponding to the terminal between the LAC and the LAC;
  • An obtaining module configured to obtain an IP address of the terminal from a DHCP server by using the terminal identifier
  • a sending module configured to send, by using the session, the IP address to the terminal.
  • An embodiment of the present invention further provides an LAC, including:
  • An acquiring module configured to acquire a terminal identifier of the terminal according to a call request sent by the terminal
  • a sending module configured to send an incoming call request to the LNS, where the incoming call request includes the terminal identifier, so that the LNS establishes a location Determining a session between the LAC and the LNS corresponding to the terminal, and acquiring an IP address of the terminal from a DHCP server, and sending the IP address to the terminal by using the session.
  • the LNS establishes a session corresponding to the terminal between the LAC and the LNS according to the terminal identifier of the terminal included in the incoming call request from the LAC, and uses the terminal identifier to learn from the DHCP.
  • the server obtains the IP address of the terminal and sends the IP address to the terminal through the established session.
  • the local address pool is not required to be configured on the LNS. This reduces the configuration complexity of the LNS and improves the LNS configuration efficiency.
  • FIG. 1 is a schematic flowchart of an address processing method according to Embodiment 1 of the present invention.
  • FIG. 2 is a schematic flowchart of an address processing method according to Embodiment 2 of the present invention.
  • FIG. 3 is a schematic structural diagram of an LNS according to Embodiment 3 of the present invention.
  • FIG. 4 is a schematic structural diagram of a LAC according to Embodiment 4 of the present invention.
  • FIG. 1 is a schematic flowchart of an address processing method according to Embodiment 1 of the present invention. As shown in FIG. 1, the address processing method in this embodiment may include the following steps:
  • Step 101 The LNS receives an incoming call request from the LAC, where the incoming call request includes a terminal identifier of the terminal, and the terminal identifier of the terminal is obtained by the LAC according to the call request sent by the terminal;
  • Step 102 The LNS establishes a session corresponding to the terminal between the LAC and the LNS according to the terminal identifier.
  • the above terminal identifiers may include but are not limited to media access control ( Medium/MediaAccess Control, MAC ) address.
  • a new attribute value pair (Attribute Value Pair, called AVP) is added to the incoming call request.
  • Step 103 The LNS obtains the IP address of the terminal from a Dynamic Host Configuration Protocol (DHCP) server by using the terminal identifier. Specifically, the LNS may send a DHCP request including the terminal identifier to the DHCP server, and receive The DHCP response returned by the DHCP server, which contains the IP address assigned by the DHCP server to the terminal.
  • DHCP Dynamic Host Configuration Protocol
  • Step 104 The LNS sends the IP address to the terminal by using the session.
  • the LNS establishes a session of the corresponding terminal between the LAC and the LNS according to the terminal identifier of the terminal included in the incoming call request from the LAC, and acquires the IP of the terminal from the DHCP server by using the terminal identifier.
  • the address and the above-mentioned session are sent to the terminal to send the IP address to the terminal.
  • the local address pool is not required to be configured on the LNS. This reduces the configuration complexity of the LNS and improves the LNS configuration efficiency.
  • FIG. 2 is a schematic flowchart of an address processing method according to Embodiment 2 of the present invention. This embodiment is a specific embodiment of the previous embodiment. As shown in FIG. 2, the address processing method in this embodiment may include the following steps:
  • Step 201 When the LAC detects that a user dials in a call through the terminal, the eNB sends an incoming call request (Incoming-Call-Request, called ICRQ), where the incoming call request includes the LAC obtaining according to the call request sent by the terminal.
  • ICRQ Incoming-Call-Request
  • the MAC address of the above terminal to request to establish a session of the terminal in an established tunnel;
  • Step 202 The LNS returns an incoming call response (Incoming-Call-Reply, ICRP) to the LAC;
  • ICRP Incoming-Call-Reply
  • Step 203 The LAC sends an incoming call to the LNS (Incoming-Call-Connected);
  • the session of the corresponding terminal between the LAC and the LNS is established. Further, the LNS can store the correspondence between the session identifier of the established session and the MAC address of the obtained terminal, so that the LNS can subsequently maintain and manage the terminal.
  • Step 204 The LNS interacts with the DHCP server by using the foregoing MAC address to obtain an IP address of the terminal.
  • Step 205 The LNS sends the obtained IP address to the terminal by using the established session.
  • the LNS establishes a session corresponding to the terminal between the LAC and the LNS according to the MAC address of the terminal included in the incoming call request from the LAC, and acquires the terminal from the DHCP server by using the MAC address.
  • the IP address is sent to the terminal through the established session.
  • the local address pool is not required to be configured on the LNS. This reduces the configuration complexity of the LNS and improves the LNS configuration efficiency.
  • FIG. 3 is a schematic structural diagram of an LNS according to Embodiment 3 of the present invention.
  • the LNS of this embodiment may include a receiving module 30, an establishing module 31, an obtaining module 32, and a sending module 33.
  • the receiving module 30 is configured to receive an incoming call request from the LAC, where the incoming call request includes a terminal identifier of the terminal, where the terminal identifier is obtained by the LAC according to a call request sent by the terminal; and the establishing module 31 is configured to use the incoming call request according to the foregoing
  • the terminal identifier included in the terminal is configured to establish a session with the LAC corresponding to the terminal;
  • the obtaining module 32 is configured to obtain the IP address of the terminal from the DHCP server by using the terminal identifier included in the incoming call request, and the sending module 33
  • the above IP address obtained by the obtaining module 32 is sent to the terminal by using the above session established by the establishing module 31.
  • the terminal identifier may include but Not limited to
  • the functions of the LNS in the first embodiment and the second embodiment of the present invention are all implemented by the LNS provided by the embodiment of the present invention.
  • the obtaining module 32 in this embodiment may specifically send a DHCP request to the DHCP server, where the DHCP request includes the terminal identifier, and receive a DHCP response returned by the DHCP server, where the DHCP response includes the DHCP server.
  • the IP address assigned by the terminal may specifically send a DHCP request to the DHCP server, where the DHCP request includes the terminal identifier, and receive a DHCP response returned by the DHCP server, where the DHCP response includes the DHCP server.
  • the IP address assigned by the terminal may specifically send a DHCP request to the DHCP server, where the DHCP request includes the terminal identifier, and receive a DHCP response returned by the DHCP server, where the DHCP response includes the DHCP server.
  • the IP address assigned by the terminal may specifically send a DHCP request to the DHCP server, where the DHCP request includes the terminal identifier, and receive a DHCP response returned by the DHCP server,
  • the LNS establishes a session corresponding to the terminal between the LAC and the LNS according to the terminal identifier of the terminal included in the incoming call request from the LAC, and the acquiring module uses the content included in the incoming call request.
  • the terminal identifier, the IP address of the terminal is obtained from the DHCP server, and the IP address is sent to the terminal by the sending module, and the local address pool is not required to be configured on the LNS, thereby reducing the configuration complexity of the LNS.
  • the configuration efficiency of the LNS is a session corresponding to the terminal between the LAC and the LNS according to the terminal identifier of the terminal included in the incoming call request from the LAC, and the acquiring module uses the content included in the incoming call request.
  • the terminal identifier, the IP address of the terminal is obtained from the DHCP server, and the IP address is sent to the terminal by the sending module, and the local address pool is not required to be configured on the LNS, thereby reducing the configuration complexity of the LNS.
  • the LAC of this embodiment may include an obtaining module 41 and a sending module 42.
  • the obtaining module 41 is configured to acquire the terminal identifier of the terminal according to the call request sent by the terminal
  • the sending module 42 is configured to send an incoming call request to the LNS, where the incoming call request includes the terminal identifier acquired by the obtaining module 41, so that the foregoing
  • the LNS establishes a session corresponding to the terminal between the LAC and the LNS, and acquires an IP address of the terminal from a DHCP server, and sends the IP address to the terminal through the session.
  • the foregoing terminal identifier may include, but is not limited to, a MAC address.
  • the functions of the LAC in the first embodiment and the second embodiment of the present invention can be implemented by the LAC provided by the embodiment of the present invention.
  • the LAC obtains the terminal identifier of the terminal according to the call request sent by the terminal, and then the sending module sends an incoming call request that includes the terminal identifier to the LNS, so that the LNS can establish the LAC and the LNS according to the terminal identifier.
  • the session of the terminal and the request for obtaining the IP address of the terminal by using the terminal identifier are not required to be configured on the LNS, and the configuration complexity of the LNS can be reduced, thereby improving the configuration efficiency of the LNS.

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  • Computer Networks & Wireless Communication (AREA)
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  • Data Exchanges In Wide-Area Networks (AREA)

Description

地址处理方法及装置 本申请要求于 2011 年 3 月 30 日提交中国专利局、 申请号为 201110078360.X, 发明名称为 "地址处理方法及装置" 的中国专利申 请的优先权, 其全部内容通过引用结合在本申请中。 技术领域 本发明实施例涉及通信技术, 尤其涉及一种地址处理方法及装置。
背景技术 第二层隧道协议 ( Layer Two Tunneling Protocol , 筒称 L2TP )的网络 架构主要由 L2TP访问集中器( L2TP Access Concentrator, 筒称 LAC ) 和 L2TP网络服务器( L2TP Network Server, 筒称 LNS )构成。 LAC位于
LNS与终端之间, 用于在 LNS与终端之间传递信息: 将从终端接收到的信 息按照 L2TP进行封装并发送给 LNS; 将从 LNS接收到的信息按照 L2TP 进行解封装并发送给终端。
然而,上述终端的 I P地址是由 LNS在本地地址池中为该终端分配的本地 IP地址, 这样, 会增加 LNS的配置复杂性, 从而降低了 LNS的配置效率。 发明内容 本发明实施例提供一种地址处理方法及装置, 以降低 LNS的配置复杂 性, 提高 LNS的配置效率。
本发明实施例提供了一种地址处理方法, 包括:
LNS接收来自 LAC的进入呼叫请求,所述进入呼叫请求中包含终端的 所述 LNS根据所述终端标识, 建立所述 LAC与所述 LNS之间的对应 所述终端的会话;
所述 LNS利用所述终端标识, 从 DHCP服务器获取所述终端的 IP地 址;
所述 LNS通过所述会话, 向所述终端发送所述 IP地址。
本发明实施例还提供了一种 LNS, 包括:
接收模块, 用于接收来自 LAC的进入呼叫请求, 所述进入呼叫请求中 请求获取的;
建立模块, 用于根据所述终端标识, 建立与所述 LAC之间的对应所述 终端的会话;
获取模块, 用于利用所述终端标识, 从 DHCP服务器获取所述终端的 IP地址;
发送模块, 用于通过所述会话, 向所述终端发送所述 IP地址。
本发明实施例还提供了一种 LAC, 包括:
获取模块, 用于根据终端发送的呼叫请求获取所述终端的终端标识; 发送模块, 用于向 LNS发送进入呼叫请求, 所述进入呼叫请求中包含 所述终端标识,以使所述 LNS建立所述 LAC与所述 LNS之间的对应所述终端 的会话, 以及从 DHCP服务器获取所述终端的 IP地址, 并通过所述会话, 向 所述终端发送所述 IP地址。 由上述技术方案可知,本发明实施例通过 LNS根据来自 LAC的进入呼 叫请求中包含的终端的终端标识,建立上述 LAC与上述 LNS之间的对应该 终端的会话, 以及利用上述终端标识, 从 DHCP服务器获取上述终端的 IP 地址, 并通过建立的上述会话, 向上述终端发送上述 IP地址, 无需在 LNS 上配置本地地址池,能够降低 LNS的配置复杂性,从而提高了 LNS的配置 效率。 附图说明 为了更清楚地说明本发明实施例或现有技术中的技术方案, 下面将对 实施例或现有技术描述中所需要使用的附图作一筒单地介绍, 显而易见地, 下面描述中的附图是本发明的一些实施例, 对于本领域普通技术人员来讲, 在不付出创造性劳动的前提下, 还可以根据这些附图获得其他的附图。
图 1为本发明实施例一提供的地址处理方法的流程示意图;
图 2为本发明实施例二提供的地址处理方法的流程示意图;
图 3为本发明实施例三提供的 LNS的结构示意图;
图 4为本发明实施例四提供的 LAC的结构示意图。
具体实施方式 为使本发明实施例的目的、 技术方案和优点更加清楚, 下面将结合本 发明实施例中的附图, 对本发明实施例中的技术方案进行清楚、 完整地描 述,显然, 所描述的实施例是本发明一部分实施例, 而不是全部的实施例。 基于本发明中的实施例, 本领域普通技术人员在没有作出创造性劳动前提 下所获得的所有其他实施例, 都属于本发明保护的范围。
图 1 为本发明实施例一提供的地址处理方法的流程示意图, 如图 1所 示, 本实施例的地址处理方法可以包括以下步骤:
步骤 101、 LNS接收来自 LAC的进入呼叫请求, 上述进入呼叫请求中 包含终端的终端标识, 上述终端的终端标识为上述 LAC根据上述终端发送 的呼叫请求获取的;
步骤 102、 上述 LNS根据上述终端标识, 建立上述 LAC与上述 LNS 之间的对应上述终端的会话;
• 其中, 上述终端标识可以包括但不限于介质访问控制 ( Medium/MediaAccess Control, MAC )地址。 入呼叫请求中新增一个属性值对( Attribute Value Pair,筒称 AVP )来实现。
步骤 103、上述 LNS利用上述终端标识,从动态主机配置协议( Dynamic Host Configuration Protocol,筒称 DHCP )服务器获取上述终端的 IP地址; 具体地, LNS可以向 DHCP服务器发送包含终端标识的 DHCP请求, 接收 DHCP月^务器返回的 DHCP响应, 该 DHCP响应中包含 DHCP月^务 器为终端分配的 IP地址。
步骤 104、 上述 LNS通过上述会话, 向上述终端发送上述 IP地址。 本实施例中,通过 LNS根据来自 LAC的进入呼叫请求中包含的终端的 终端标识,建立上述 LAC与上述 LNS之间的对应终端的会话, 以及利用上 述终端标识,从 DHCP服务器获取上述终端的 IP地址, 并通过建立的上述 会话, 向上述终端发送上述 IP地址, 无需在 LNS上配置本地地址池, 能够 降低 LNS的配置复杂性, 从而提高了 LNS的配置效率。
图 2为本发明实施例二提供的地址处理方法的流程示意图, 本实施例 为上一实施例的具体实施例, 如图 2所示, 本实施例的地址处理方法可以 包括以下步骤:
步骤 201、 当 LAC检测到有用户通过终端拨入电话时, 向 LNS发送进 入呼叫请求( Incoming-Call-Request, 筒称 ICRQ ), 上述进入呼叫请求中 包含上述 LAC根据上述终端发送的呼叫请求获取的上述终端的 MAC地址, 以请求在已建立的隧道(tunnel ) 中建立上述终端的会话(session );
步骤 202、 LNS向 LAC返回进入呼叫应答 ( Incoming-Call-Reply, 筒 称 ICRP ) ;
步 骤 203 、 LAC 向 LNS 发 送 进 入 呼 叫 已 连 接 ( Incoming-Call-Connected );
至此, LAC与 LNS之间的对应终端的会话建立完毕。 进一步地, LNS可以存储建立的会话的会话标识与获取的终端的 MAC 地址的对应关系, 以供 LNS后续对该终端进行维护与管理。
步骤 204、 LNS利用上述 MAC地址与 DHCP服务器进行交互, 获取 上述终端的 IP地址;
步骤 205、 LNS通过建立的会话,向上述终端发送获取的上述 IP地址。 本实施例中,通过 LNS根据来自 LAC的进入呼叫请求中包含的终端的 MAC地址, 建立上述 LAC与上述 LNS之间的对应上述终端的会话, 以及 利用上述 MAC地址, 从 DHCP服务器获取上述终端的 IP地址, 并通过建 立的上述会话,向上述终端发送上述 IP地址,无需在 LNS上配置本地地址 池, 能够降低 LNS的配置复杂性, 从而提高了 LNS的配置效率。
需要说明的是: 对于前述的各方法实施例, 为了筒单描述, 故将其都 表述为一系列的动作组合, 但是本领域技术人员应该知悉, 本发明并不受 所描述的动作顺序的限制, 因为依据本发明, 某些步骤可以采用其他顺序 或者同时进行。 其次, 本领域技术人员也应该知悉, 说明书中所描述的实 施例均属于优选实施例, 所涉及的动作和模块并不一定是本发明所必须的。
在上述实施例中, 对各个实施例的描述都各有侧重, 某个实施例中没 有详述的部分, 可以参见其他实施例的相关描述。
图 3为本发明实施例三提供的 LNS的结构示意图, 如图 3所示, 本实 施例的 LNS可以包括接收模块 30、建立模块 31、获取模块 32和发送模块 33。 其中, 接收模块 30用于接收来自 LAC的进入呼叫请求, 上述进入呼 叫请求中包含终端的终端标识, 上述终端标识为 LAC根据终端发送的呼叫 请求获取的; 建立模块 31用于根据上述进入呼叫请求中包含的上述终端标 识, 建立与上述 LAC之间的对应上述终端的会话; 获取模块 32用于利用 上述进入呼叫请求中包含的上述终端标识, 从 DHCP服务器获取上述终端 的 IP地址; 发送模块 33用于通过建立模块 31建立的上述会话, 向上述终 端发送获取模块 32获取的上述 IP地址。 其中, 上述终端标识可以包括但 不限于 MAC地址。
上述本发明实施例一、 二中 LNS的功能均可以由本发明实施例提供的 LNS实现。
具体地, 本实施例中的获取模块 32具体可以向上述 DHCP服务器发 送 DHCP请求,上述 DHCP请求中包含上述终端标识,以及接收上述 DHCP 服务器返回的 DHCP响应, 上述 DHCP响应中包含上述 DHCP服务器为 上述终端分配的 IP地址。
本实施例中, LNS通过建立模块根据来自 LAC的进入呼叫请求中包含 的终端的终端标识,建立上述 LAC与上述 LNS之间的对应上述终端的会话, 以及获取模块利用上述进入呼叫请求中包含的终端标识, 从 DHCP服务器 获取上述终端的 IP地址, 进而由发送模块通过建立的上述会话, 向上述终 端发送上述 IP地址, 无需在 LNS上配置本地地址池, 能够降低 LNS的配 置复杂性, 从而提高了 LNS的配置效率。
图 4为本发明实施例四提供的 LAC的结构示意图, 如图 4所示, 本实 施例的 LAC可以包括获取模块 41和发送模块 42。 其中, 获取模块 41用 于根据终端发送的呼叫请求获取上述终端的终端标识;发送模块 42用于向 LNS发送进入呼叫请求,上述进入呼叫请求中包含获取模块 41获取的上述 终端标识, 以使上述 LNS建立上述 LAC与上述 LNS之间的对应上述终端 的会话, 以及从 DHCP服务器获取上述终端的 IP地址, 并通过上述会话, 向上述终端发送上述 IP地址。其中,上述终端标识可以包括但不限于 MAC 地址。
上述本发明实施例一、 二中 LAC的功能均可以由本发明实施例提供的 LAC实现。
本实施例中, LAC通过获取模块根据终端发送的呼叫请求获取上述终 端的终端标识, 进而由发送模块向 LNS发送包含上述终端标识的进入呼叫 请求, 从而可以使得 LNS根据上述终端标识建立 LAC与 LNS之间的对应 上述终端的会话, 以及利用上述终端标识向 DHCP服务器请求获取上述终 端的 IP地址, 无需在 LNS上配置本地地址池, 能够降低 LNS的配置复杂 性, 从而提高了 LNS的配置效率。
本领域普通技术人员可以理解: 实现上述方法实施例的全部或部分步 骤可以通过程序指令相关的硬件来完成, 前述的程序可以存储于一计算机 可读取存储介质中, 该程序在执行时, 执行包括上述方法实施例的步骤; 而前述的存储介质包括: ROM、 RAM, 磁碟或者光盘等各种可以存储程序 代码的介质。
最后应说明的是: 以上实施例仅用以说明本发明的技术方案, 而非对其限 制; 尽管参照前述实施例对本发明进行了详细的说明, 本领域的普通技术 人员应当理解: 其依然可以对前述各实施例所记载的技术方案进行修改, 或者对其中部分技术特征进行等同替换; 而这些修改或者替换, 并不使相 应技术方案的本质脱离本发明各实施例技术方案的精神和范围。

Claims

权利要求
1、 一种地址处理方法, 其特征在于, 包括:
第二层隧道协议网络服务器 LNS接收来自第二层隧道协议访问集中器 LAC 的进入呼叫请求, 所述进入呼叫请求中包含终端的终端标识, 所述终 端标识为所述 LAC根据所述终端发送的呼叫请求获取的;
所述 LNS根据所述终端标识, 建立所述 LAC与所述 LNS之间的对应 所述终端的会话;
所述 LNS利用所述终端标识,从动态主机配置协议 DHCP服务器获取 所述终端的 IP地址;
所述 LNS通过所述会话, 向所述终端发送所述 IP地址。
2、 根据权利要求 1 所述的方法, 其特征在于, 所述 LNS利用所述终 端标识, 从 DHCP服务器获取所述终端的 IP地址, 包括:
所述 LNS向所述 DHCP服务器发送 DHCP请求, 所述 DHCP请求中 包含所述终端标识;
所述 LNS fJ i DHCP月^务器返回的 DHCP响应, 所述 DHCP响 应中包含所述 DHCP服务器为所述终端分配的 IP地址。
3、 根据权利要求 1或 2所述的方法, 其特征在于, 所述终端标识包括 介质访问控制 MAC地址。
4、 一种第二层隧道协议网络服务器 LNS, 其特征在于, 包括: 接收模块, 用于接收来自第二层隧道协议访问集中器 LAC的进入呼叫 请求,所述进入呼叫请求中包含终端的终端标识,所述终端标识为所述 LAC 根据所述终端发送的呼叫请求获取的;
建立模块, 用于根据所述终端标识, 建立与所述 LAC之间的对应所述 终端的会话;
获取模块, 用于利用所述终端标识, 从动态主机配置协议 DHCP服务 器获取所述终端的 IP地址;
发送模块, 用于通过所述会话, 向所述终端发送所述 IP地址。
5、根据权利要求 4所述的 LNS, 其特征在于, 所述获取模块具体用于 向所述 DHCP服务器发送 DHCP请求, 所述 DHCP请求中包含所述 终端标识, 以及接收所述 DHCP服务器返回的 DHCP响应, 所述 DHCP 响应中包含所述 DHCP服务器为所述终端分配的 IP地址。
6、根据权利要求 4或 5所述的 LNS, 其特征在于, 所述终端标识包括 MAC地址。
7、 一种第二层隧道协议访问集中器 LAC, 其特征在于, 包括: 获取模块, 用于根据终端发送的呼叫请求获取所述终端的终端标识; 发送模块,用于向第二层隧道协议网络服务器 LNS发送进入呼叫请求, 所述进入呼叫请求中包含所述终端标识,以使所述 LNS建立所述 LAC与所 述 LNS之间的对应所述终端的会话,以及从动态主机配置协议 DHCP服务 器获取所述终端的 IP地址,并通过所述会话,向所述终端发送所述 IP地址。
8、根据权利要求 7所述的 LAC,其特征在于,所述终端标识包括 MAC 地址。
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