CN112738081B

CN112738081B - Method for expanding communication protocol of PON local area network group based on VXLAN technology

Info

Publication number: CN112738081B
Application number: CN202011579413.1A
Authority: CN
Inventors: 胡兆祥; 何金亮; 郑直; 王培佩
Original assignee: Wuhan Yangtze Optical Technology Co ltd
Current assignee: Wuhan Yangtze Optical Technology Co ltd
Priority date: 2020-12-28
Filing date: 2020-12-28
Publication date: 2022-07-29
Anticipated expiration: 2040-12-28
Also published as: CN112738081A

Abstract

A method for expanding the communication protocol of PON local area network group based on VXLAN technology, the virtual service interface established at the OLT port is responsible for assembling the communication protocol for expanding the PON local area network group based on VXLAN technology, and the content is loaded in TCP/UDP payload data segment; the Version field is defined as 0x1, and the Protocol field is defined as the communication type of the payload; the fields of the destination vlan id and the Source vlan id are defined as the TAG attribute of the L2 link data of the service data; the FLAG field appoints a TAG attribute operation identifier of L2 link data of the service data, and allows configuration of VLAN TAG; the TTL field is 1, the value of the virtual service interface is set to zero after the communication forwarding is completed, and the forwarding is forbidden when the appointed TTL is 0. The invention seamlessly realizes the local area network group crossing regions and networks and has strong compatibility.

Description

Method for expanding communication protocol of PON local area network group based on VXLAN technology

Technical Field

The invention relates to the field of PON local area network scale expansion, in particular to a communication protocol agreement method for expanding a PON local area network group based on VXLAN technology.

Background

With the continuous popularization of broadband strategy in China, the FTTH access network operation has already realized ultra-large-scale commercial use in China, the service application of the FTTH local area network is mostly limited to the scale and architecture of the local network, and the cross-regional and cross-network FTTH local area networks have development bottlenecks at present.

The promotion of the requirements of the SDN service and the virtualization service puts higher requirements on the local area network service across regions and networks, the PON has the characteristic of natural L2 layer network forwarding, the expansion requirement of the novel service can be matched most, and the possible technical and planning complexity in the SDN/virtualization process can be reduced to the greatest extent, so that the function of realizing the local area network group across the regions on the basis of the PON is more important.

Disclosure of Invention

The technical problem to be solved by the invention is to provide a communication protocol method based on the existing PON local area network expansion method aiming at the high-speed growth demand of SDN and virtualization service on the L2 network scale, so that GPON/EPON equipment meeting the agreement of the protocol can be communicated, and a regional and network-crossing local area network group is realized; based on the existing IPv4/IPv6 network, the compatibility is strong, and the ultra-large-scale L2-layer service network expansion is met.

The technical scheme adopted by the invention for solving the technical problems is as follows:

a method for expanding communication protocol of PON local area network group based on VXLAN technology comprises the following steps:

s1, agreeing to a communication protocol for expanding the PON local area network group based on the VXLAN technology, where the communication protocol is carried in a TCP/UDP payload data segment, and a format definition of the TCP/UDP payload data segment is shown in table 1:

Table 1 communication protocol for expanding PON local area network group based on VXLAN technology

S2, creating a virtual service interface at the OLT port, and taking charge of assembling the agreed communication protocol, wherein the Source Region is the number of the local area network, and the destination Region is the number of the destination local area network; when the message broadcasting is needed, the field of the destination Region is filled with 0 xFFFF;

s3, setting Version fields to be 0x1, wherein the Version fields are sequentially accumulated after revision according to the continuous revision of the protocol; the Protocol field is appointed as the communication type of the payload, and the communication type appointed by the Protocol field comprises:

0x01 Forwarding, identifying Forwarding of service data;

0x02 FowardingRSp for identifying the receiving response of the service data;

0x03, RegionIdRequest, query request for LAN number;

0x04 RegionIdResponse, inquiry response of local area network number;

0x05, RegionCfgRequest, configuration request of virtual service interface;

0x05, RegionCfgRespone, configuration response of virtual service interface;

different communication types, the UerData content of the communication protocol is different;

s4, a destination VLAN id and a Source VLAN id field are defined as TAG attributes of L2 link data of the service data, wherein the Source VLAN id is an original VLAN TAG of the service data, and the destination VLAN id is a target VLAN TAG of the service data;

S5, the FLAG field is a function multiplexing control field, and the control of the service data is agreed, which specifically includes: 1) TAG attribute operation identification of L2 link data of service data, allowing configuration of VLAN TAG; 2) a Qos identifier, configured to manage and control traffic when the virtual service interface forwards the traffic;

and S6, setting the TTL field value to be 1, after the virtual service interface created by the OLT port completes communication forwarding, setting the TTL field value to be zero, and prohibiting forwarding when the virtual service interface detects that the TTL field of the message is 0.

According to the above scheme, the "local area network number and destination local area network number" described in step S2 are numbers of each G/EPON local area network, and are set by the device administrator, and the number value of each G/EPON local area network remains unique in the group.

The invention has the following beneficial effects:

1. GPON/EPON equipment agreed on the basis of the protocol can be intercommunicated, PON local area networks belonging to different regions or different operator networks are aggregated on the basis of the service attribute of a user, and cross-region and cross-network local area network groups are seamlessly realized;

2. the communication method agreed by the protocol is based on the existing IPv4/IPv6 network, and has strong compatibility.

3. The communication method agreed by the protocol can realize the intercommunication of cross-VLAN L2 service data under the background that an SDN network and a virtual local area network need to be increased at a high speed, and meets the ultra-large-scale expansion of an L2 layer service network;

4. The protocol appointed communication method supports the realization of a QOS service priority management and control function;

5. the method also supports the isolation function based on the service, and is suitable for related fields such as EPON/GPON/NG-PON and the like.

Detailed Description

The present invention is described in further detail below.

The invention discloses an agreement method for expanding a communication protocol of a PON local area network group based on VXLAN technology, which comprises the following steps:

s1, meeting the communication protocol for expanding the PON local area network group based on the VXLAN technology, wherein the payload content of the TCP/UDP field is in the format shown in the table 1;

s2, creating a virtual service interface at the OLT port, and taking charge of assembling the agreed communication protocol, wherein the Source Region is the number of the local area network, and the destination Region is the number of the destination local area network; when the message broadcasting is needed, the destination Region field is filled with 0 xFFFF. The local area network number and the destination area network number are numbers of the G/EPON local area networks and are set by an equipment manager, and the number value of each G/EPON local area network keeps uniqueness in the group.

And S3, setting the Version field to be 0x1, and sequentially accumulating the revised Version fields. The Protocol field is defined as the communication type of the payload.

The fields of S4, destination VLAN id and Source VLAN id are defined as the TAG attribute of the L2 link data of the service data, wherein the Source VLAN id is the original VLAN TAG of the service data, and the destination VLAN id is the target VLAN TAG.

S5, the FLAG field is a function multiplexing control field, and the control of the service data is agreed, which specifically includes: 1) TAG attribute operation identification of L2 link data of service data, allowing configuration of VLAN TAG; 2) and the QoS identifier is used for flow control when the virtual service interface forwards.

And S6, the TTL field must be 1, the virtual service interface created by the OLT port sets the value to zero after finishing communication forwarding, and the virtual service interface is appointed to forbid forwarding when detecting that the TTL field of the message is 0.

Claims

1. A method for expanding communication protocol of PON local area network group based on VXLAN technology is characterized by comprising the following steps:

s1, appointing a communication protocol for expanding the PON local area network group based on VXLAN technology, wherein the communication protocol is carried in a TCP/UDP payload data section, the content format of the TCP/UDP payload data section comprises fields and the encapsulation sequence of each field, and the appointments are described every 4 bytes as follows:

bytes 1 and 2: dest Region, bytes 3 and 4: the two fields of the Source Region, the Dest Region and the Source Region occupy 32 bits;

Byte 5: version, byte 6: protocol, bytes 7 and 8: length, Version, Protocol and Length occupy 32 bits;

bytes 9 and 10: destvlan id, bytes 11 and 12: the two fields of Source vlan Id, Destvlan Id and Source vlan Id occupy 32bit together;

byte 13: FLAG, 14 th byte: TTL, 15 th and 16 th bytes: the three fields of CheckSum, FLAG, TTL and CheckSum occupy 32 bits;

byte 17 to end of message: UserData, no more than 1500 bytes in length;

s2, the virtual service interface created at the OLT port is responsible for assembling the agreed communication protocol, wherein, the Source Region is the number of the local area network, and the Dest Region is the number of the target area network; when the message broadcasting is needed, filling a Dest Region field into 0 xFFFF;

s3, setting Version fields to be 0x1, wherein the Version fields are sequentially accumulated after revision according to continuous revision of the protocol; the Protocol field is appointed as the communication type of the payload, and the communication type appointed by the Protocol field comprises:

0x01 Forwarding, identifying Forwarding of service data;

0x02 FowardingRSp for identifying the receiving response of the service data;

0x03, RegionIdRequest, query request for LAN number;

0x04 RegionIdResponse, inquiry response of local area network number;

0x05, RegionCfgRequest, configuration request of virtual service interface;

0x06, RegionCfgRespone, configuration response of virtual service interface;

the fields of S4, DestvlanId and Source VLAN Id are defined as the TAG attribute of the L2 link data of the service data, wherein Source VLAN Id is the original VLAN TAG of the service data, and DestvlanId is the target VLAN TAG of the service data;

2. The method according to claim 1, wherein the "local area network number and destination local area network number" described in step S2 are numbers of each G/EPON local area network, and are set by a device administrator, and the number value of each G/EPON local area network remains unique in the group.