CN109257266B

CN109257266B - Method for expanding PON local area network group based on VXLAN technology

Info

Publication number: CN109257266B
Application number: CN201811070231.4A
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: 2018-09-13
Filing date: 2018-09-13
Publication date: 2021-04-27
Anticipated expiration: 2038-09-13
Also published as: CN109257266A

Abstract

A method for expanding PON local area network group based on VXLAN technology comprises the following steps: s1, identifying, distinguishing and dividing different service local area networks according to the PON local area network user L2 service VLAN attribute; s2, aiming at each service local area network, creating a virtual service port and configuring IP/UDP information of the port service gateway; s3, respectively creating and configuring respective virtual service ports and IP/UDP information on different local side OLT equipment through a command line or an NMS network management system; s4, enabling virtual service ports on the OLT, and performing L3 network interconnection and forwarding on L2 data lines of the local terminal and the opposite terminal to realize the intercommunication of L2 layer data of two local area networks; s5, establishing a larger-scale PON local area network group by configuring the aggregation of the multi-service local area networks. The invention realizes the cross-region and cross-operator L2 interconnection of the business networking model of each local side OLT and ONU in the PON system by VXLAN technology, so as to expand the scale of the PON local area network and realize the access forwarding function of the data link layer of the super-large scale PON access network.

Description

Method for expanding 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 method for expanding PON local area network groups 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 method aims to solve the technical problem that aiming at the high-speed increase requirement of SDN and virtualization service on the scale of an L2 network, the method provides a method for expanding a PON local area network group based on a VXLAN technology, and based on the service attribute of a user, the PON local area networks belonging to different regions or different operator networks are aggregated, the existing PON local area network is expanded, and the regional and network-crossing local area network group can be realized.

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

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

s1, identifying, distinguishing and dividing different service local area networks according to the PON local area network user L2 service VLAN attribute;

s2, aiming at each service local area network, creating a virtual service port and configuring IP/UDP information of the port service gateway;

s3, respectively creating and configuring respective virtual service ports and IP/UDP information on different local side OLT equipment through a command line or an NMS network management system;

s4, enabling virtual service ports on the OLT, and performing L3 network interconnection and forwarding on L2 data lines of the local terminal and the opposite terminal to realize the intercommunication of L2 layer data of two local area networks;

s5, establishing a larger-scale PON local area network group by configuring the aggregation of the multi-service local area networks.

According to the above scheme, the service division in step S1 is performed by differentiating VLAN attributes of user service data, the services of the same VLAN in the same PON local area network are all identified as the same service local area network, the OLT divides the home terminal into a plurality of service local areas based on the service VLAN attributes of the user, and each service local area network is identified by a unique VLAN (under a condition that a plurality of service VLANs may exist in a common PON system, so that the PON system supports a plurality of service local areas, which are also identified by VLANs).

According to the above scheme, in step S2, for each defined service lan, a virtual service port is created at the OLT port, and L3 network information is configured, where the configuration items include: source IP address, source UDP port, gateway IP.

According to the above scheme, when different PON OLTs/ONUs need to be aggregated in a networking manner in step S3, the allocating and configuring IP/UDP information of each other on the local OLT and the peer OLT mainly includes: the destination IP address of the opposite terminal and the UDP port of the opposite terminal.

According to the above scheme, IN step S4, a virtual service port on the OLT is enabled, the virtual service port has an automatic forwarding function and an automatic learning function based on the service VLAN, and the activated virtual service port encapsulates, through VXLAN technology, an access request (local L2 data) that needs to apply for external access IN the local lan or is transmitted by an opposite-end lan into an IP data packet by MAC IN UDP, and performs packet and decapsulation forwarding through a conventional L3 network technology to reach the opposite-end OLT, and the opposite-end OLT parses L2 layer data and forwards the layer data IN the local area network of the same VLAN (thereby realizing the cross-domain networking and L2 forwarding functions of the PON local area network, realizing transparent transmission, and also realizing the isolation requirements of different VLAN services, so as to achieve the function of expanding the L2 service local area network).

The core idea of the invention is as follows: the business networking model of each local side OLT and ONU in the PON system is interconnected through a VXLAN technology to realize cross-region and cross-operator L2, so that the scale of the PON local area network is expanded, and the access forwarding function of the data link layer of the super-large scale PON access network is realized.

Compared with the prior art, the invention has the beneficial effects that:

1. the method aggregates PON local area networks belonging to different regions or different operator networks based on the service attributes of users, expands the existing PON local area networks, can realize cross-region and cross-network PON local area network groups, and establishes a super-large-scale L2 network; the cross-domain networking function is seamlessly realized, under the background that the SDN and the virtual local area network need to be increased at a high speed, the function described by the method can meet the ultra-large-scale expansion of the L2 layer service network, and the method is suitable for related fields such as EPON/GPON/NG-PON;

2. the deployment is simple, the cost is low, and the requirements of SDN/virtualization technology and the like on the L2 ultra-large scale can be met;

3. the virtually created port is transparent to users and services; the management is based on IP, and the controllability and the maintainability are strong;

4. the method can realize accurate manual intervention of network topology, and the physical topology of the existing certain ultra-large-scale L2 layer network generally depends on the specific physical position of the L2/L3 switching equipment, so that the adjustment is complex and the association degree between the equipment is high; the method can establish a super-large scale L2 layer network on a logic level without depending on specific physical entity equipment, and when manual intervention is needed, dynamic adjustment of a local area network group can be carried out only by modifying the IP address of a virtual service port;

5. the method also supports service-based isolation functions.

Drawings

Fig. 1 shows the data flow of the present invention for expanding PON local area network groups based on VXLAN technology.

Detailed Description

The present invention will be further described in detail with reference to the accompanying drawings.

Referring to fig. 1, the method for expanding a PON local area network group based on the VXLAN technology of the present invention includes the following steps:

s1, identifying, distinguishing and dividing different service local area networks according to the PON local area network user L2 service VLAN attribute; the services are deployed in different regions or different networks and are identified and associated according to the VLAN, and because of the specific attributes of the VLAN, the services forming the local area network generally use the same VLAN attribute, otherwise, the local area network has an isolation function. When multiple services exist, multiple service local area networks are allowed to be created, and isolation protection among different services is guaranteed by the isolation attribute function of the VLAN.

S2, aiming at each service local area network, creating a virtual service port and configuring IP/UDP information of the port service gateway; the virtual service port is realized based on a VXLAN function, the virtual service port has the functions of entering a local port local area network based on an encapsulation mode of a MAC IN UDP, including an IP and a UDP port number of the local service local area network and gateway IP information, and when a plurality of L2 service local area networks are required to be expanded IN a PON, a plurality of IP/UDP information are required to be configured and distinguished by proper indexes.

S3, respectively creating and configuring respective virtual service ports and IP/UDP information on different local side OLT equipment through a command line or an NMS network management system; when forwarding is carried out through an L3 layer network, IP/UDP information of each service local area network in a local area network group needs to be appointed, and the accessibility of a target network is ensured by the IP;

s4, enabling virtual service ports on the OLT, and performing L3 network interconnection and forwarding on L2 data lines of the local terminal and the opposite terminal to realize the intercommunication of L2 layer data of two local area networks; as described above, after the virtual service port is enabled, the port performs forwarding of L2 data service as a common port, performs port MAC address learning, and also has the functions of flow control and data flow shaping, and particularly, the port no longer allows VLAN configuration; however, after the virtual service ports of different OLTs are interconnected by L3 network, the L2 service flow can be directly accessed between two OLTs, and the connection and access rate depend on the rate and quality of L3 network.

S5, configuring aggregation of multi-service local area networks, and constructing a larger PON local area network group. When a plurality of PON local area network groups need to be carried out, the steps of S1-S4 are only needed to be repeated, and the aggregation configuration is carried out based on the service VLAN.

Claims

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

s2, aiming at each service local area network, creating a virtual service port, and configuring the IP address, the IP mask and the UDP port information of the port;

2. The method according to claim 1, wherein the division of the services in step S1 is performed by using VLAN attributes of user service data, the services of the same VLAN in the same PON lan are all identified as the same service lan, the OLT divides the local end into a plurality of service lans based on the service VLAN attributes of the user, and each service lan is identified by a unique VLAN.

3. The method according to claim 1, wherein in step S2, for each defined service area network, a virtual service port is created at the OLT port, and L3 network information is configured, the configuration items include: source IP address, source UDP port, gateway IP.

4. The method according to claim 1, wherein when different PON OLT/ONUs need to be aggregated in a networking manner in step S3, the method for expanding PON local area network groups according to VXLAN technology allocates IP/UDP information of the opposite party to the local and opposite OLTs, and mainly comprises: the destination IP address of the opposite terminal and the UDP port of the opposite terminal.

5. The method according to claim 1, wherein IN step S4, a virtual service port on the OLT is enabled, the virtual service port has an automatic forwarding function and an automatic learning function based on the service VLAN, and the virtual service port encapsulates an access request that needs to apply for an external access or an access request from an opposite-end lan into an IP packet through the VXLAN technology, and performs packet forwarding and decapsulation forwarding through a conventional L3 network technology to reach the opposite-end OLT, and the opposite-end OLT parses the L2 layer data and forwards the layer data IN the local area network of the same VLAN.