WO2016082335A1

WO2016082335A1 - Ip address allocation method, coaxial cable intermediate converter and system

Info

Publication number: WO2016082335A1
Application number: PCT/CN2015/072444
Authority: WO
Inventors: 邱海啸; 吴晓东
Original assignee: 中兴通讯股份有限公司
Priority date: 2014-11-25
Filing date: 2015-02-06
Publication date: 2016-06-02
Also published as: CN105610994B; CN105610994A

Abstract

Provided are an IP address allocation method, a coaxial cable intermediate converter and a system. The method comprises: configuring an IP port on a CMC, binding a CM and a CPE which have an identical service under the IP port, and configuring for the IP port a CM DHCP server and a CPE DHCP server which are used for CM IP address allocation and CPE IP address allocation respectively; the CMC receiving a DHCP discovery packet sent from the CM under the IP port, judging whether the DHCP discovery packet is initiated by the CM, and if so, sending the DHCP discovery packet to the CM DHCP server, and the CM DHCP server allocating an IP address to the coaxial modem according to the received DHCP discovery packet; and if not, the DHCP discovery packet being initiated by the CPE, sending the DHCP discovery packet to the CPE DHCP server, and the CPE DHCP server allocating an IP address to the CPE according to the received DHCP discovery packet.

Description

IP address allocation method, coaxial cable intermediate converter and system

Technical field

The present invention relates to the field of communications, and in particular, to an IP address allocation method, a coaxial cable intermediate converter, and a system.

Background technique

PON (Passive Optical Network) + DoCSIS (Data Over Cable Service Interface Specification) EoC (Ethernet Over Coax: Ethernet data transmission over coaxial cable) secondary networking technology specifically for the current Domestic radio and television two-way network modification and foreign MSO CMTS (Cable Modem Termination System) network upgrade requirements, proposed by HFC (Hybrid Fiber-Coaxial: Hybrid Fiber Coaxial Network) network to FTTx (Fiber-to- The-x: fiber access) evolution of the overall solution. The solution is based on the combination of PON network and DoCSIS network, which can protect the existing CMTS network investment, and at the same time, it can meet the network development trend of optical access and optical fiber migration. CMC - Coaxial Media Converter, a DoCSIS EoC central office device, DoCSIS coaxial cable broadband access head, plays a role in the entire network, is the end of the PON network protocol, and is also DoCSIS The starting point of the network protocol, the OLT (Optical Line Terminal) PON network, and the CM (Cable Modem) DoCSIS network. The product adopts the DoCSIS 3.0 technology standard and serves operators of HFC networks around the world, providing broadband access services to help them complete the transition from a single TV program service provider to an integrated service operator. Users provide rich and better value-added services.

There are many DHCP (Dynamic Host Configuration Protocol) Server address allocation strategies in the traditional DOCSIS system. In the C-DOCSIS (China Data Over Cable Service Interface Specification) system, the DHCP Relay Can be implemented on the OLT or in CMC (Coaxial Mediation) Converter: Coaxial cable intermediate converter), but if you want to implement a unified allocation and management of CM and CPE (Customer Premise Equipment) in the same service by several DHCP servers, you need an effective one. The policy for assigning an IP address.

Summary of the invention

The embodiment of the invention provides an IP address allocation method, a coaxial cable intermediate converter and a system, and solves the problem of unified allocation management of IP addresses of CMs and CPEs under the same service.

An IP address allocation method includes:

The coaxial cable intermediate converter is configured with an IP port, which is bound with a coaxial modem and a client device of the same service, and is configured with a coaxial modem dynamic host configuration protocol (DHCP) server and a client device DHCP server. ;

The coaxial cable intermediate converter receives the DHCP discovery message sent by the coaxial modem under the IP port, and sends the DHCP discovery message to the DHCP discovery message when the DHCP discovery message is initiated by the coaxial modem. The coaxial modem DHCP server sends the DHCP discovery message to the client device DHCP server when the DHCP discovery message is initiated by the user equipment.

Optionally, the DHCP discovery message includes a source media access control address, where the source media access control address is a media access control address of the DHCP discovery message initiator; Determining, by the source medium access control address in the DHCP discovery packet, whether the DHCP discovery message is initiated by the coaxial modem;

Or the DHCP discovery message includes an initiator field for characterizing the initiator; the coaxial cable intermediate converter extracts an initiator field from the DHCP discovery message, and determines the DHCP discovery report according to the initiator field. Whether the originator of the text is the coaxial modem.

Optionally, the IP port is further configured with a coaxial modem proxy IP address and a client device proxy IP address;

Sending, by the coaxial cable intermediate converter, the DHCP discovery message to the coaxial modem DHCP server includes:

The coaxial cable intermediate converter selects a corresponding coaxial modem proxy IP address, and sends the DHCP discovery message to the coaxial modem DHCP server through the coaxial modem proxy IP address;

Sending, by the coaxial cable intermediate converter, the DHCP discovery message to the client device DHCP server includes:

The coaxial cable intermediate converter determines an IP port where the coaxial modem that sends the DHCP discovery message is located, and selects a corresponding client device proxy IP address under the IP port, and the proxy device IP address is used by the client device The DHCP discovery packet is sent to the corresponding client device DHCP server.

Optionally, the IP port is configured with multiple client device proxy IP addresses;

When the coaxial cable intermediate converter selects a corresponding client device proxy IP address, select the first one of the plurality of client device proxy IP addresses or proxy IP from the plurality of client devices in a rotating manner Select one of the addresses.

An IP address allocation method includes:

The coaxial cable intermediate converter receives the DHCP discovery message sent by the coaxial modem under the IP port, and sends the DHCP discovery message to the DHCP discovery message when the DHCP discovery message is initiated by the coaxial modem. a coaxial modem DHCP server, the coaxial modem DHCP server assigns an IP address to the coaxial modem according to the received DHCP discovery message; and when the DHCP discovery message is initiated by the user equipment, the DHCP discovery The packet is sent to the client device DHCP server, and the client device DHCP server allocates an IP address to the client device according to the received DHCP discovery message.

Optionally, the coaxial modem DHCP server allocates an IP address to the coaxial modem according to the received DHCP discovery message, including:

The coaxial modem DHCP server acquires a medium access control address of the coaxial modem, and allocates an IP address to the coaxial modem according to the medium access control address;

The user terminal device DHCP server allocates an IP address to the user equipment according to the received DHCP discovery message, including:

The client device DHCP server allocates an IP address to the client device according to the coaxial modem to which the client device belongs.

A coaxial cable intermediate converter comprising an IP port, a receiving module and a processing module:

The coaxial port and the client device of the same service are bound to the IP port, and the coaxial modem DHCP server and the client device DHCP server are configured;

The receiving module is configured to receive a DHCP discovery message sent by the coaxial modem under the IP port;

The processing module is configured to send the DHCP discovery message to the coaxial modem DHCP server when the DHCP discovery message is initiated by the coaxial modem; and when the DHCP discovery message is a user equipment When the device initiates, the DHCP discovery packet is sent to the client device DHCP server.

Optionally, the DHCP discovery message includes a source media access control address, where the source media access control address is a media access control address of the DHCP discovery message initiator; and the processing module is further configured to be according to the DHCP The source medium access control address in the discovery packet determines whether the DHCP discovery message is initiated by the coaxial modem;

Or the DHCP discovery message includes an initiator field for characterizing the initiator; the processing module is further configured to: extract an initiator field from the DHCP discovery message, and determine the DHCP discovery message according to the initiator field. Whether the initiator is the coaxial modem.

The processing module is configured to send the DHCP discovery message to the coaxial modem DHCP server in the following manner:

Selecting a corresponding coaxial modem proxy IP address, and sending the DHCP discover message to the coaxial modem DHCP server through the coaxial modem proxy IP address;

The processing module is configured to send the DHCP discovery message to the client device DHCP server in the following manner:

Determining an IP port of the coaxial modem that sends the DHCP discovery message, selecting a corresponding client device proxy IP address under the IP port, and sending the DHCP discovery packet to the corresponding device through the proxy device IP address. Client device DHCP server.

The processing module is configured to select a corresponding client device proxy IP address in the following manner: selecting a first one of the plurality of client device proxy IP addresses or proxying from the plurality of client device devices in a rotating manner Select one of the IP addresses.

An IP address distribution system includes a coaxial cable intermediate converter, a coaxial modem DHCP server, and a client device DHCP server; the coaxial cable intermediate converter is configured with an IP port, a coaxial modem and a client for the same service The device is bound to the IP port, and the IP port is configured with a coaxial modem DHCP server and a client device DHCP server;

The coaxial cable intermediate converter is configured to receive a DHCP discovery message sent by the coaxial modem under the IP port, and when the DHCP discovery message is initiated by the coaxial modem, the DHCP discovery message is sent Sending to the coaxial modem DHCP server; when the DHCP discovery message is initiated by the user equipment, sending the DHCP discovery message to the client device DHCP server;

The coaxial modem DHCP server is configured to allocate an IP address to the coaxial modem according to the received DHCP discovery message;

The client device DHCP server is configured to allocate an IP address to the client device according to the received DHCP discovery message.

Optionally, the coaxial modem DHCP server is configured to assign an IP address to the coaxial modem according to the received DHCP discovery message in the following manner:

Obtaining a media access control address of the coaxial modem, and assigning an IP address to the coaxial modem according to the media access control address;

The client device DHCP server is configured to allocate an IP address to the user equipment according to the received DHCP discovery message in the following manner:

Assigning an IP address to the client device according to the coaxial modem to which the client device belongs.

The embodiment of the invention further provides a computer readable storage medium storing program instructions, which can be implemented when the program instructions are executed.

The solution provided by the embodiment of the present invention implements unified allocation and management of IP addresses of CMs and CPEs of the same service that are connected to the CMC.

BRIEF abstract

1 is a schematic structural diagram of an IP address allocation system according to Embodiment 1 of the present invention;

2 is a schematic structural diagram of a coaxial cable intermediate converter according to Embodiment 1 of the present invention;

3 is a schematic flowchart of an IP address allocation method according to Embodiment 2 of the present invention;

FIG. 4 is a schematic flowchart of an IP address allocation method according to Embodiment 3 of the present invention.

Preferred embodiment of the invention

The embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

Embodiment 1:

Referring to FIG. 1, the IP address distribution system provided in this embodiment includes a coaxial cable intermediate converter (CMC) and a DHCP server; wherein the DHCP server includes a coaxial modem (CM) DHCP server and a customer premises equipment (CPE) DHCP. The server is configured with an IP port (that is, an IP Bundle). The CM and CPE of the same service are bound to the IP port. The IP port is configured with a CM DHCP server for CM IP address allocation and CPE IP address allocation, respectively. The CPE DHCP server; in this embodiment, the IP address network segment can be used to determine whether it is the same service. The IP address system also includes a CM that is connected to the CMC and a CPE that is connected to each CM. The CPE in this embodiment may be an STB (Set Top Box), a Host (Host), an IAD (Integrated Access Device), or the like.

The CMC is configured to receive the DHCP discovery packet (which may be a DHCP DISCOVER packet or a DHCP REQUEST packet) sent by the CM on the configured IP port, and determine whether the DHCP discovery packet is the CM that sends the DHCP discovery packet. If yes, the DHCP discovery packet is sent to the corresponding CM DHCP server; if not, the DHCP discovery packet is the The CPE initiated by the CPE sends the DHCP discovery packet to the corresponding CPE DHCP server.

The CM DHCP server is configured to allocate an IP address to the CM that initiates the DHCP discovery message according to the received DHCP discovery message.

The CPE DHCP server is configured to allocate an IP address to the CPE that initiates the DHCP Discovery message according to the received DHCP Discovery message.

In this embodiment, different DHCP servers are used to allocate IP addresses to the CM and the CPE, which can share the load and is more conducive to resource utilization. Of course, in some application scenarios, the same DHCP can also be used to assign IP addresses to CMs and CPEs.

In this embodiment, the CMC determines whether the DHCP discovery packet is initiated by the CM, and may adopt at least one of the following two methods:

Manner 1: The DHCP discovery packet includes a source media access control (MAC) address, where the source MAC address is the MAC address of the initiator of the DHCP discovery packet.

The CMC obtains the MAC address of the CM that sends the DHCP discovery packet, and extracts the source MAC address from the DHCP discovery packet, and compares the MAC address of the CM with the extracted source MAC address. If yes, the DHCP discovery packet is If the CM initiates; if not, it determines that the DHCP discovery message is initiated by the CPE under the CM.

In this embodiment, after the judgment is completed, or before the judgment, the CMC can also insert the MAC address of the obtained CM into the DHCP discovery message, so that the CM DHCP server can perform the autonomous judgment. Optionally, the Option 82 field of the DHCP Discovery message can be inserted, and the DHCP Relay Agent Information Option (82): insert the MAC address of the CM in the sub-option 2:Remote ID; the CM DHCP server can be based on the MAC address in the Remote ID. Whether it is equal to the original MAC in the DHCP discovery message to determine whether the application is from the CM or from the CPE under the CM (such as stb/PC/eMTA, etc.).

Manner 2: The DHCP discovery message includes an initiator field for characterizing the initiator; the CMC acquires an initiator field of the received DHCP discovery message, and determines, according to the initiator field, whether the initiator is a CM. The initiator field in this embodiment may specifically be an Option 60 field of a DHCP discovery packet, where the DHCP Option 60 field is set as follows:

When the first six strings of the OP60 string are docsis, the initiator of the DHCP discovery message can be determined as Cable-modem (ie CM);

The first four of the OP60 strings are pktc, and the initiator of the DHCP discovery message is determined to be the eMTA.

The first three of the OP60 strings are STBs, and the initiator of the DHCP discovery message is determined to be stb.

The first four of the OP60 strings are MSFT, and the initiator of the DHCP discovery message is determined to be a PC.

The DHCP discovery packet in this embodiment further includes an Option 43 field, where the Option 43 field includes: VSI (Vendor Specific Information), which is used to exchange vendor specific information between the DHCP server and the client, and when the DHCP server receives the request Option 43 information. After the DHCP request packet (with parameter 43 in Option 55), Option 43 is carried in the reply packet to assign the vendor-specified information to the DHCP client. In this embodiment, the DHCP message initiated by the CPE (eMTA/PC/stb, etc.) can carry only Option 60 and does not carry Option 43. For the CM, as long as it conforms to the CableLabs standard, it must carry Option 60 and Option 43 at the same time.

The CMC in this embodiment also supports the function of the DHCP relay (DHCP proxy), which is connected to the OLT and the OLT is a Layer 2 transparent transmission device. Before receiving the DHCP discovery packet sent by the CM under the configured IP port, the CMC also includes configuring the CM proxy IP address and the CPE proxy IP address for the IP port. When the CMC sends the DHCP discovery packet to the CM DHCP server, the CMC can select the corresponding The CM proxy IP address, through which the DHCP discovery packet is sent to the CM DHCP server. The CMC sends the DHCP discovery packet to the CPEDHCP server. The CMC determines the IP port of the CM that sends the DHCP discovery packet, selects the corresponding CPE proxy IP address under the IP port, and sends the DHCP discovery packet through the CPE proxy IP address. The text is sent to the corresponding CPE DHCP server.

When the CMC in this embodiment configures the CPE proxy IP address and the CM proxy IP address for the IP port, you can configure one or more as needed. When multiple configurations are configured, you can select the first one as the default CPE proxy IP address and CM. Proxy IP address, or choose in turn when selected, of course, other optimization algorithms can also be used for selection. For example, when the configured CPE proxy IP address includes multiple, when the CMC selects the corresponding CPE proxy IP address, select the first one of the multiple CPE proxy IP addresses or select from multiple CPE proxy IP addresses in a round robin manner. One.

After receiving the DHCP discovery packet, the CM DHCP server extracts the MAC address of the CM that sends the DHCP discovery packet from the DHCP discovery packet, and matches the CM to the corresponding IP address from the address pool according to the MAC address. After receiving the DHCP Discovery message, the CPE DHCP server is The process of assigning an IP address to a CPE can be:

The CPE DHCP server assigns an IP address to the CPE according to the CM to which the CPE belongs. Specifically, when the CPE initiates a DHCP discovery packet, the CMC determines which CPE proxy IP under the IP port should be selected as its own relay IP according to the IP of the CM connected to the CPE, and the CPE DHCP server also uses the CPE proxy according to the CPE proxy. IP to perform the same subnet address assignment.

Referring to FIG. 2, the coaxial cable intermediate converter (CMC) in this embodiment includes an IP port, a receiving module, and a processing module: the coaxial port and the client device with the same service are bound to the IP port, and Configured with a coaxial modem DHCP server and a client device DHCP server;

The receiving module is configured to receive a DHCP discovery packet sent by the CM under the IP port;

The processing module is configured to: when the DHCP discovery message received by the receiving module is initiated by the CM, send the DHCP discovery message to the coaxial modem DHCP server; when the DHCP discovery message is initiated by the CPE, the DHCP discovery message is sent. Send to the client device DHCP server.

The DHCP discovery packet in this embodiment includes the source MAC address, and the source MAC address is the MAC address of the initiator of the DHCP discovery packet. The processing module determines whether the source MAC address in the DHCP discovery packet is initiated by the CM. The module obtains the MAC address of the CM that sends the DHCP discovery packet, and extracts the source MAC address from the DHCP discovery packet, and compares the MAC address of the CM with the extracted source MAC address. If yes, the DHCP discovery packet is The CM initiates; if not, it determines that the DHCP discovery message is initiated by the CPE under the CM.

Or the DHCP discovery message includes an initiator field for characterizing the initiator; the processing module extracts an initiator field from the DHCP discovery message, and determines, according to the initiator field, whether the initiator is initiated by the CM.

The IP port in this embodiment is further configured with a coaxial modem proxy IP address and a client device proxy IP address;

The processing module sends the DHCP discovery message to the coaxial modem DHCP server, including:

The processing module selects a corresponding coaxial modem proxy IP address, and sends the DHCP discovery message to the coaxial modem DHCP server through the coaxial modem proxy IP address;

The processing module sends the DHCP discovery packet to the client device DHCP server, including:

The processing module determines the IP port of the coaxial modem that sends the DHCP discovery message, selects the corresponding client device proxy IP address under the IP port, and sends the DHCP discovery packet to the corresponding user through the proxy device IP address of the client device. End device DHCP server.

The IP port in this embodiment is configured with multiple client device proxy IP addresses;

When the processing module selects the corresponding client device proxy IP address, select the first one of the plurality of client device proxy IP addresses or select one of the plurality of client device proxy IP addresses in a round-robin manner.

Embodiment 2:

For the IP address allocation method provided in this embodiment, refer to FIG. 3, which includes:

Step 201: Configure an IP port on the CMC, and bind the CM and CPE of the same service to the IP port.

Step 202: Configure a CM DHCP server and a CPE DHCP server for the CM IP address allocation and CPE IP address allocation for the IP port respectively.

Step 203: The CMC receives the DHCP discovery packet sent by the CM under the IP port.

Step 204: The CMC determines whether the DHCP discovery message is initiated by the CM, if yes, go to step 205; if no, go to step 207;

Step 205: The CMC sends the DHCP discovery packet to the CM DHCP server.

Step 206: The CM DHCP server allocates an IP address to the CM according to the received DHCP discovery message.

Step 207: The DHCP discovery packet is initiated by the CPE, and the DHCP discovery packet is sent to the CPE DHCP server.

Step 208: The CPE DHCP server allocates an IP address to the CPE according to the received DHCP discovery message.

Manner 1: The DHCP discovery packet contains the source MAC address (that is, the medium access control address), and the source MAC address is the MAC address of the initiator of the DHCP discovery packet.

The CMC obtains the MAC address of the CM that sends the DHCP discovery packet, and extracts the source MAC address from the DHCP discovery packet, and compares the MAC address of the CM with the extracted source MAC address. If yes, the DHCP discovery packet is The CM initiates; if not, it determines that the DHCP discovery message is initiated by the CPE under the CM.

In this embodiment, after the judgment is completed, or before the judgment, the CMC can also insert the MAC address of the obtained CM into the DHCP discovery message, so that the CM DHCP server can perform the autonomous judgment. Specifically, the Option 82 field of the DHCP Discovery message can be inserted, and the DHCP Relay Agent Information Option (82): insert the MAC address of the CM in the sub-option 2:Remote ID; the CM DHCP server can be based on whether the MAC address in the Remote ID is It is equal to the original MAC in the DHCP discovery message to determine whether the application is from the CM or from the CPE under the CM (such as stb/PC/eMTA, etc.).

Manner 2: The DHCP discovery message includes an initiator field for characterizing the initiator; the CMC acquires an initiator field of the received DHCP discovery message, and determines, according to the initiator field, whether the initiator is a CM. The initiator field in this embodiment may be an Option 60 field of a DHCP discovery packet, where the DHCP Option 60 field is set as follows:

When the first six strings of the OP60 string are docsis, the initiator of the DHCP discovery message is determined to be a cable-modem (ie, CM);

The DHCP discovery packet in this embodiment further includes an Option 43 field, where the Option 43 field includes: VSI (Vendor Specific Information), which is used to exchange vendor specific information between the DHCP server and the client, and when the DHCP server receives the request Option 43 information. After the DHCP request packet (with parameter 43 in Option 55), Option 43 is carried in the reply packet, which is DHCP. The client assigns information specified by the vendor. In this embodiment, the DHCP message initiated by the CPE (eMTA/PC/stb, etc.) can carry only Option 60 and does not carry Option 43. For the CM, as long as it conforms to the CableLabs standard, it must carry Option 60 and Option 43 at the same time.

The CMC in this embodiment also supports the function of the DHCP relay (DHCP proxy), which is connected to the OLT and the OLT is a Layer 2 transparent transmission device. Before receiving the DHCP discovery packet sent by the CM under the configured IP port, the CMC also includes configuring the CM proxy IP address and the CPE proxy IP address for the IP port. When the CMC sends the DHCP discovery packet to the CM DHCP server, the CMC can select the corresponding The CM proxy IP address is sent to the CM DHCP server through the CM proxy IP address. The CMC sends the DHCP discovery packet to the CPEDHCP server. The CMC determines the IP port of the CM that sends the DHCP discovery packet, selects the corresponding CPE proxy IP address under the IP port, and sends the DHCP discovery packet through the CPE proxy IP address. The text is sent to the corresponding CPE DHCP server.

After receiving the DHCP discovery packet, the CM DHCP server extracts the MAC address of the CM that sends the DHCP discovery packet from the DHCP discovery packet, and matches the CM to the corresponding IP address from the address pool according to the MAC address. After receiving a DHCP Discovery message, the CPE DHCP server assigns an IP address to the CPE as follows:

The CPE DHCP server assigns an IP address to the CPE according to the CM to which the CPE belongs. Specifically, when the CPE initiates a DHCP discovery message, the CMC determines, according to the IP address of the CM that the CPE receives, which CPE proxy IP address should be selected as its own relay IP address, and the CPE DHCP server also This CPE proxy IP address is used for the same subnet address assignment.

Embodiment 3:

For a better understanding of the present invention, in this embodiment, a specific application scenario is taken as an example for the present invention. A further illustrative illustration will be made. When the DHCP relay is implemented on the CMC, the OLT is connected to the OLT. The OLT only needs to support VLAN Layer 2 transparent transmission. Referring to Figure 4, the process of assigning IP addresses to CMs and CPEs includes:

Step 301: Configure an IP Bundle (ie, an IP port) on the CMC, and configure the CM and the CPE of the same service as the same IP Bundle subnet, that is, bound to an IP Bundle;

Step 302: Configure the CM DHCP server, the CPE DHCP server, and the corresponding proxy IP address for the IP Bundle. In this embodiment, the CM DHCP server and the CPE DHCP server are separately configured for the CM and the CPE, and the configuration is as follows:

The IP Bundle configuration on the CMC is as follows:

Cmc(config)#interface bundle 1//configure bundle1

Cmc(config-if)#ip address 191.168.3.3255.255.255.0//CM online relay ip address

Cmc(config-if)#ip address 191.168.4.3255.255.255.0secondary//CPE online relay ip address

Cmc(config-if)#ip address 191.168.5.3255.255.255.0secondary//CPE online relay ip address

Cmc(config-if)#cable helper-address 172.16.1.144//CM DHCP server ip address, used to assign ip address to CM

Cmc(config-if)#cable helper-address 172.16.2.144cpe//CPE DHCP ip address, used to assign IP address to CPE

Cmc(config-if)#cable source-verify dhcp//Support DHCP to obtain ip address of CM/CPE

Cmc(config-if)#cable dhcp-giaddr policy 1//Select the first ip address from the secondary type as the relay ip address of the CPE online;

Step 303: The CM or the CPE initiates a DHCP discovery message (that is, sends a DHCP discover message or a DHCP request message);

Step 304: The CMC receives the DHCP discovery packet sent by the CM under it, and extracts the DHCP. Discover the source MAC address in the packet and obtain the MAC address of the CM.

Step 305: The CMC determines whether the extracted source MAC address is consistent with the obtained MAC address of the CM, and if yes, go to step 306: If no, go to step 308;

Step 306: The CMC distributes the DHCP discovery message to the CM DHCP server by using the default CMC proxy IP default gateway address (such as 191.168.3.3) (where the CM DHCP server is only equipped with one, so only forwards to 172.16.1.144);

Step 307: The CM DHCP server matches the source MAC address in the DHCP discovery packet to the address pool, and assigns the IP address of the CM to the CMC according to the matching result, and the subsequent protocol and data forwarding go to the IP Relay Agent to which it belongs ( As a gateway).

Step 308: The CMC determines the IP address of the CPE proxy under the IP Bundle according to the IP address of the CM to which the CPE that originated the DHCP discovery packet belongs. Assume that the above example assigns the IP address of the 191.168.3.0 network segment to the CM. The IP address judgment should select the secondary default gateway forwarding under bundle1, but because there are two secondary relay IP addresses, there is a selection command for the CMC to select which secondary relay IP address to take. The CMC distributes DHCP discovery packets to the CPE DHCP server (172.16.2.144) through the default public secondary IP Relay agent gateway address (for example, 191.168.4.3).

Step 309: The CPE DHCP server allocates the corresponding IP address according to the CM or IP Bundle status of the CPE, and the subsequent protocol and data forwarding go to the IP Relay Agent (as the gateway).

The above is an optional embodiment of the present invention, and the implementation of the present invention is not limited to the description.

One of ordinary skill in the art will appreciate that all or a portion of the steps of the above-described embodiments can be implemented using a computer program flow, which can be stored in a computer readable storage medium, such as on a corresponding hardware platform (eg, The system, device, device, device, etc. are executed, and when executed, include one or a combination of the steps of the method embodiments.

Optionally, all or part of the steps of the foregoing embodiments may also be implemented by using an integrated circuit, and the steps may be separately fabricated into integrated circuit modules, or multiple modules thereof or The steps are made into a single integrated circuit module. Thus, the invention is not limited to any specific combination of hardware and software.

The devices/function modules/functional units in the above embodiments may be implemented by a general-purpose computing device, which may be centralized on a single computing device or distributed over a network of multiple computing devices.

When each device/function module/functional unit in the above embodiment is implemented in the form of a software function module and sold or used as a stand-alone product, it can be stored in a computer readable storage medium. The above mentioned computer readable storage medium may be a read only memory, a magnetic disk or an optical disk or the like.

Industrial applicability

Claims

A network protocol (IP) address allocation method includes:

The coaxial cable intermediate converter is configured with an IP port, which is bound with a coaxial modem and a client device of the same service, and is configured with a coaxial modem dynamic host configuration protocol (DHCP) server and a client device DHCP server. ;

The coaxial cable intermediate converter receives the DHCP discovery message sent by the coaxial modem under the IP port, and sends the DHCP discovery message to the DHCP discovery message when the DHCP discovery message is initiated by the coaxial modem. The coaxial modem DHCP server sends the DHCP discovery message to the client device DHCP server when the DHCP discovery message is initiated by the user equipment.
The method for allocating an IP address according to claim 1, wherein the DHCP discovery message includes a source medium access control address, and the source medium access control address is a medium access control address of the initiator of the DHCP discovery message; The coaxial cable intermediate converter determines, according to the source medium access control address in the DHCP discovery message, whether the DHCP discovery message is initiated by the coaxial modem;

Or the DHCP discovery message includes an initiator field for characterizing the initiator; the coaxial cable intermediate converter extracts an initiator field from the DHCP discovery message, and determines the DHCP discovery report according to the initiator field. Whether the originator of the text is the coaxial modem.
The IP address allocation method according to claim 1 or 2, wherein the IP port is further configured with a coaxial modem proxy IP address and a client device proxy IP address;

Sending, by the coaxial cable intermediate converter, the DHCP discovery message to the coaxial modem DHCP server includes:

The coaxial cable intermediate converter selects a corresponding coaxial modem proxy IP address, and sends the DHCP discovery message to the coaxial modem DHCP server through the coaxial modem proxy IP address;

Sending, by the coaxial cable intermediate converter, the DHCP discovery message to the client device DHCP server includes:

The coaxial cable intermediate converter determines an IP port where the coaxial modem that sends the DHCP discovery message is located, and selects a corresponding client device proxy IP address under the IP port, and the proxy device IP address is used by the client device The DHCP discovery packet is sent to the corresponding client device DHCP server.
The IP address allocation method according to claim 3, wherein said IP port is configured with a plurality of client device proxy IP addresses;

When the coaxial cable intermediate converter selects a corresponding client device proxy IP address, select the first one of the plurality of client device proxy IP addresses or proxy IP from the plurality of client devices in a rotating manner Select one of the addresses.
A network protocol (IP) address allocation method includes:

The coaxial cable intermediate converter is configured with an IP port, which is bound with a coaxial modem and a client device of the same service, and is configured with a coaxial modem dynamic host configuration protocol (DHCP) server and a client device DHCP server. ;

The coaxial cable intermediate converter receives the DHCP discovery message sent by the coaxial modem under the IP port, and sends the DHCP discovery message to the DHCP discovery message when the DHCP discovery message is initiated by the coaxial modem. a coaxial modem DHCP server, the coaxial modem DHCP server assigns an IP address to the coaxial modem according to the received DHCP discovery message; and when the DHCP discovery message is initiated by the user equipment, the DHCP discovery The packet is sent to the client device DHCP server, and the client device DHCP server allocates an IP address to the client device according to the received DHCP discovery message.
The IP address allocation method according to claim 5, wherein the coaxial modem DHCP server assigns an IP address to the coaxial modem according to the received DHCP discovery message, including:

The coaxial modem DHCP server acquires a medium access control address of the coaxial modem, and allocates an IP address to the coaxial modem according to the medium access control address;

The user terminal device DHCP server allocates an IP address to the user equipment according to the received DHCP discovery message, including:

The client device DHCP server allocates an IP address to the client device according to the coaxial modem to which the client device belongs.
A coaxial cable intermediate converter comprising a network protocol (IP) port, a receiving module and a processing module:

The coaxial port and the client device of the same service are bound to the IP port, and a coaxial modem dynamic host configuration protocol (DHCP) server and a client device DHCP server are configured;

The receiving module is configured to receive a DHCP discovery message sent by the coaxial modem under the IP port;

The processing module is configured to send the DHCP discovery message to the coaxial modem DHCP server when the DHCP discovery message is initiated by the coaxial modem; and when the DHCP discovery message is a user equipment When the device initiates, the DHCP discovery packet is sent to the client device DHCP server.
The coaxial cable intermediate converter according to claim 7, wherein said DHCP discovery message includes a source medium access control address, and said source medium access control address is a medium access control address of said DHCP discovery message initiator The processing module is further configured to determine, according to the source medium access control address in the DHCP discovery message, whether the DHCP discovery message is initiated by the coaxial modem;

Or the DHCP discovery message includes an initiator field for characterizing the initiator; the processing module is further configured to: extract an initiator field from the DHCP discovery message, and determine the DHCP discovery message according to the initiator field. Whether the initiator is the coaxial modem.
The coaxial cable intermediate converter according to claim 7 or 8, wherein said IP port is further configured with a coaxial modem proxy IP address and a client device proxy IP address;

The processing module is configured to send the DHCP discovery message to the coaxial modem DHCP server in the following manner:

Selecting a corresponding coaxial modem proxy IP address, and sending the DHCP discover message to the coaxial modem DHCP server through the coaxial modem proxy IP address;

The processing module is configured to send the DHCP discovery message to the client device DHCP server in the following manner:

Determining an IP port of the coaxial modem that sends the DHCP discovery message, selecting a corresponding client device proxy IP address under the IP port, and sending the DHCP discovery packet to the corresponding device through the proxy device IP address. Client device DHCP server.
The coaxial cable intermediate converter of claim 9 wherein said IP port is configured with a plurality of client device proxy IP addresses;

The processing module is configured to select a corresponding client device proxy IP address in the following manner: selecting a first one of the plurality of client device proxy IP addresses or proxying from the plurality of client device devices in a rotating manner Select one of the IP addresses.
A network protocol (IP) address allocation system includes a coaxial cable intermediate converter, a coaxial modem dynamic host configuration protocol (DHCP) server, and a client device DHCP server; the coaxial cable intermediate converter is configured with an IP port The coaxial modem and the client device of the same service are bound to the IP port, and the IP port is configured with a coaxial modem DHCP server and a client device DHCP server;

The coaxial cable intermediate converter is configured to receive a DHCP discovery message sent by the coaxial modem under the IP port, and when the DHCP discovery message is initiated by the coaxial modem, the DHCP discovery message is sent Sending to the coaxial modem DHCP server; when the DHCP discovery message is initiated by the user equipment, sending the DHCP discovery message to the client device DHCP server;

The coaxial modem DHCP server is configured to allocate an IP address to the coaxial modem according to the received DHCP discovery message;

The client device DHCP server is configured to allocate an IP address to the client device according to the received DHCP discovery message.
The IP address distribution system of claim 11 wherein said coaxial modem DHCP server is configured to assign an IP address to the coaxial modem based on the received DHCP discovery message in the following manner:

Obtaining a media access control address of the coaxial modem, and assigning an IP address to the coaxial modem according to the media access control address;

The client device DHCP server is configured to allocate an IP address to the user equipment according to the received DHCP discovery message in the following manner:

Assigning an IP address to the client device according to the coaxial modem to which the client device belongs.
A computer readable storage medium storing program instructions that, when executed, can implement the method of any of claims 1-6.