CN110121124B - PON aggregation remote DCN ring prevention method - Google Patents
PON aggregation remote DCN ring prevention method Download PDFInfo
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- CN110121124B CN110121124B CN201910388940.5A CN201910388940A CN110121124B CN 110121124 B CN110121124 B CN 110121124B CN 201910388940 A CN201910388940 A CN 201910388940A CN 110121124 B CN110121124 B CN 110121124B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q11/00—Selecting arrangements for multiplex systems
- H04Q11/0001—Selecting arrangements for multiplex systems using optical switching
- H04Q11/0062—Network aspects
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q11/00—Selecting arrangements for multiplex systems
- H04Q11/0001—Selecting arrangements for multiplex systems using optical switching
- H04Q11/0062—Network aspects
- H04Q11/0067—Provisions for optical access or distribution networks, e.g. Gigabit Ethernet Passive Optical Network (GE-PON), ATM-based Passive Optical Network (A-PON), PON-Ring
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q11/00—Selecting arrangements for multiplex systems
- H04Q11/0001—Selecting arrangements for multiplex systems using optical switching
- H04Q11/0062—Network aspects
- H04Q2011/0079—Operation or maintenance aspects
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q11/00—Selecting arrangements for multiplex systems
- H04Q11/0001—Selecting arrangements for multiplex systems using optical switching
- H04Q11/0062—Network aspects
- H04Q2011/0079—Operation or maintenance aspects
- H04Q2011/0083—Testing; Monitoring
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q11/00—Selecting arrangements for multiplex systems
- H04Q11/0001—Selecting arrangements for multiplex systems using optical switching
- H04Q11/0062—Network aspects
- H04Q2011/009—Topology aspects
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Abstract
A PON polymerization remote DCN ring-prevention method comprises the following steps: (1) when the local side and the far side of the PON aggregation remote equipment are started, a switching chip management VLAN is set to be isolated from all PON service cards; (2) the local side and the far side send messages to the PON service card at regular time and interact the main information of the equipment; (3) the local side and the far end update the topological connection according to the interactive information, and the far end judges whether the local side and the far end are connected with the same local side or not; (4) the local side and the remote side continuously exchange information, monitor the change of the topological connection and update the state; (5) after discovering the topological connection, the local side adds the inline port of the PON service card into the DCN management VLAN in a trunk mode; (6) and after the remote end judges that more than two topologies are connected to the same local end, adding the unique slot position internal connection port into the DCN management VLAN in a trunk mode. The invention shields the loop from the source, does not need to be broken without the loop, has simple and easily maintained principle and ensures the communication stability of the local end and the far end.
Description
Technical Field
The invention relates to a PON polymerization remote DCN ring prevention method.
Background
The Passive Optical Network (PON) consists of an OLT (Optical Line terminal) installed at a central control station, an ONU (Optical Network unit) Optical Network unit installed at a user end, and an ODN (Optical Distribution Network) Optical Distribution Network between the OLT and the ONU.
A PON is a power-limited system, and the path loss during transmission directly determines the optical division ratio and the transmission distance. To solve the problem, the PON stretching (RE) technology has been developed. The essential of the method is that active equipment is deployed in a PON network, so that the PON distance is lengthened and the optical branching ratio is increased.
The PON aggregation remote equipment converges the multiple PON services, so that the multiple PONs are transmitted on one optical fiber, the transmission efficiency is greatly improved, and the optical fiber resources are remarkably saved. The PON aggregation remote is deployed at an OLT-side test called local side, and is deployed at an ONU-side test called remote side, and the remote side can be discovered by an automatic network manager of the local side, so that the opening efficiency is improved, and the maintenance complexity is reduced.
In the application scenario of the PON aggregation remote device, the structure of the local side is the same as that of the remote side, and the PON aggregation remote device supports a multi-slot PON service card, and a dcn (data Communication network) management implementation process thereof, a user transmits data to the remote side through an in-band channel by using a local side switch chip, and the remote side strips the data from the in-band channel and sends the data to the switch chip, and the data is processed by a remote cpu and then sent back to the local side along an original path. A single PON service card may converge 8 channels of PON users, and multiple PON service cards in actual networking are in remote end butt joint, or converge to one optical fiber for transmission through a combined/divided wavelength service card, but this networking situation has a loop risk.
The solid line of the service message is according to the flow directions of OLT- > PON aggregation remote local side- > PON aggregation remote side- > ONU; the management message dotted line is transmitted to the far end through the exchange chip and the service overhead channel. Management messages between the local side PON service card 1 and the far-end PON service card 1, and between the local side PON service card 2 and the far-end PON service card 2 form loops (dotted line loops) between 2 switch chips, which results in that an OLT center cannot remotely manage the far end, and even a broadcast storm occurs, which results in that the entire uplink DCN network is broken down.
Disclosure of Invention
The invention aims to provide a PON aggregation remote DCN loop prevention method, which solves the problem that local side and remote side DCN management channels have loops in the practical application of PON aggregation remote.
In order to achieve the above purpose, a technical solution is a PON aggregation remote DCN ring prevention method, which includes the following steps:
(1) the local side and the far side of the PON aggregation remote equipment are both provided with exchange chip management VLANs, when the local side and the far side of the PON aggregation remote equipment are started, the exchange chip management VLANs are set to be isolated from all PON service cards, and an equipment management port is set in the local side exchange chip management VLAN, at the moment, a DCN service channel is normal, but user management data are discarded;
(2) the PON aggregation remote equipment central office end and the remote end send messages to each PON service card at regular intervals, send main equipment information such as MAC, IP and equipment types through an internal connection port connected with an exchange chip, receive information sent by an opposite end and update the equipment state of the opposite end;
(3) the central office end and the far end of the PON aggregation remote equipment take the logic port number of the internal connection port of each PON service card as an index, the obtained information is stored into a linked list according to the slot positions and sequenced, topological connection is listed according to MAC, IP and equipment type information, and the far end also needs to judge whether different slot positions are connected and is the same central office end;
(4) the local side and the remote side of the PON aggregation remote equipment continuously monitor whether the topological relation changes, if the opposite-end message is not received for a long time, the connection is judged to be disconnected, and meanwhile, the topological connection relation is updated;
(5) after finding out the topological connection, the local side adds the internal connection port corresponding to the slot position into the management VLAN in a trunk mode, the management message can be sent to a far end through a DCN channel, and after finding out the topological connection is disconnected, the local side restores the internal connection port to the isolation VLAN;
(6) after the far-end judges that more than two slot positions are connected to the same local end, the special slot position internal connection port is added into the management VLAN in a trunk mode according to rules, and therefore far-end management messages can be sent to the local end through a DCN channel to achieve intercommunication.
Advantageous effects
Compared with the prior art, the invention has the following advantages.
The invention has the advantages of solving the problem that the DCN management channels of the local side and the far side have loops in the practical application of PON convergent zooming, shielding the loops from the source, having no loops and needing no loop disassembly, having simple and easily maintained principle and ensuring the communication stability of the local side and the far side.
Drawings
The present invention will be described in further detail with reference to the accompanying drawings.
Fig. 1 is an application diagram of an existing PON aggregation remote device in the background art of the present invention;
fig. 2 is a schematic diagram of a PON aggregation remote DCN anti-circulation flow chart according to the present invention.
Detailed Description
The invention will be further described with reference to the accompanying drawings.
A PON aggregation remote DCN ring-prevention method, as shown in fig. 1 and fig. 2, the method includes the following steps:
(1) the local side and the far side of the PON aggregation remote equipment are both provided with exchange chip management VLANs, when the local side and the far side of the PON aggregation remote equipment are started, the exchange chip management VLANs are set to be isolated from all PON service cards, and an equipment management port is set in the local side exchange chip management VLAN, at the moment, a DCN service channel is normal, but user management data are discarded;
(2) the PON aggregation remote equipment central office end and the remote end send messages to each PON service card at regular intervals, send main equipment information such as MAC, IP and equipment types through an internal connection port connected with an exchange chip, receive information sent by an opposite end and update the equipment state of the opposite end;
(3) the central office end and the far end of the PON aggregation remote equipment take the logic port number of the internal connection port of each PON service card as an index, the obtained information is stored into a linked list according to the slot positions and sequenced, topological connection is listed according to MAC, IP and equipment type information, and the far end also needs to judge whether different slot positions are connected and is the same central office end;
(4) the local side and the remote side of the PON aggregation remote equipment continuously monitor whether the topological relation changes, if the opposite-end message is not received for a long time, the connection is judged to be disconnected, and meanwhile, the topological connection relation is updated;
(5) after finding out the topological connection, the local side adds the internal connection port corresponding to the slot position into the management VLAN in a trunk mode, the management message can be sent to a far end through a DCN channel, and after finding out the topological connection is disconnected, the local side restores the internal connection port to the isolation VLAN;
(6) after the far-end judges that more than two slot positions are connected to the same local end, the special slot position internal connection port is added into the management VLAN in a trunk mode according to rules, and therefore far-end management messages can be sent to the local end through a DCN channel to achieve intercommunication.
Therefore, when the local side and the far end are communicated, only one DCN management channel is provided, and the problem that the DCN management channels of the local side and the far end have loops in the PON aggregation remote practical application is fundamentally solved.
The invention provides a PON aggregation remote DCN ring-prevention method, which manages VLAN isolation by default when a local side and a remote side are started, sends protocol messages to each PON service card, interacts equipment MAC, IP and type information, lists topological connection according to different message contents, and selects one or only one channel as a DCN management channel by the local side and the remote side according to a certain rule. The invention solves the problem that the DCN management channels of the local side and the far side have loops in the practical application of PON convergent zooming, shields the loops from the source, does not need to be broken without the loops, has simple and easily maintained principle, and ensures the communication stability of the local side and the far side.
Claims (1)
1. A PON polymerization remote DCN ring-prevention method is characterized by comprising the following steps:
(1) the local side and the far side of the PON aggregation remote equipment are both provided with exchange chip management VLANs, when the local side and the far side of the PON aggregation remote equipment are started, the exchange chip management VLANs are set to be isolated from all PON service cards, and an equipment management port is set in the local side exchange chip management VLAN, at the moment, a DCN service channel is normal, but user management data are discarded;
(2) the PON aggregation remote equipment central office end and the remote end send messages to each PON service card at regular intervals, send main equipment information such as MAC, IP and equipment types through an internal connection port connected with an exchange chip, receive information sent by an opposite end and update the equipment state of the opposite end;
(3) the central office end and the far end of the PON aggregation remote equipment take the logic port number of the internal connection port of each PON service card as an index, the obtained information is stored into a linked list according to the slot positions and sequenced, topological connection is listed according to MAC, IP and equipment type information, and the far end also needs to judge whether different slot positions are connected and is the same central office end;
(4) the local side and the remote side of the PON aggregation remote equipment continuously monitor whether the topological relation changes, if the opposite-end message is not received for a long time, the connection is judged to be disconnected, and meanwhile, the topological connection relation is updated;
(5) after finding out the topological connection, the local side adds the internal connection port corresponding to the slot position into the management VLAN in a trunk mode, the management message can be sent to a far end through a DCN channel, and after finding out the topological connection is disconnected, the local side restores the internal connection port to the isolation VLAN;
(6) after the far-end judges that more than two slot positions are connected to the same local end, the special slot position internal connection port is added into the management VLAN in a trunk mode according to rules, and therefore far-end management messages can be sent to the local end through a DCN channel to achieve intercommunication.
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