CN113055118A - Method and system for repairing optical hybrid circuit bearing IP protocol - Google Patents
Method and system for repairing optical hybrid circuit bearing IP protocol Download PDFInfo
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- H04J3/00—Time-division multiplex systems
- H04J3/16—Time-division multiplex systems in which the time allocation to individual channels within a transmission cycle is variable, e.g. to accommodate varying complexity of signals, to vary number of channels transmitted
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- H04J2203/00—Aspects of optical multiplex systems other than those covered by H04J14/05 and H04J14/07
- H04J2203/0001—Provisions for broadband connections in integrated services digital network using frames of the Optical Transport Network [OTN] or using synchronous transfer mode [STM], e.g. SONET, SDH
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Abstract
The invention discloses a method and a system for repairing an optical hybrid circuit bearing an IP protocol, wherein a POTN (packet optical network transport) network element is used in a network management system for configuring the optical hybrid circuit completely bearing the IP protocol, if the POTN network element is replaced, an IP layer circuit is cut into a discrete state from a complete state, and the repairing method comprises the following steps: reestablishing a client layer of an IP layer circuit on the POTN network element, establishing a new PVE port to be bound with the POTN network element, and reestablishing an IP layer Tunnel cross on the POTN network element based on the PVE port; and performing inverse calculation of the OTN layer circuit, repairing the OTN layer circuit into a complete end-to-end circuit, repairing the OTN layer circuit into a complete state from a discrete state, triggering the IP layer circuit carried on the OTN layer circuit to repair, and recovering the service layer of the IP layer circuit, so that the IP layer circuit carried on the whole OTN layer circuit completes the repair.
Description
Technical Field
The invention belongs to the field of telecommunication transmission management, and particularly relates to a method and a system for repairing an optical hybrid circuit bearing an IP protocol.
Background
In the daily operation and maintenance of the network system, the network cutover is very important and frequent, and the efficiency and the usability of the cutover are more characteristics of great concern to users. At present, there are two mature cutover ideas, one is to use a strategy of replacing a manually-assigned port to perform the cutover from top to bottom, namely to modify a circuit, the other is to change the circuit into an incomplete state by a network management system without paying attention to specific modification of the circuit in the cutover process, and after the cutover is completed, the network management system automatically restores the circuit into the complete state, namely the idea of discrete inverse calculation restoration.
In the current Network management system, an Optical Transport Network (OTN) circuit is cut over by using a discrete back calculation method, and an Internet Protocol (IP) layer circuit is cut over by using a modification method, and both methods have a mature algorithm. However, with the development of telecommunication networks, network operators increasingly configure networking scenarios of internet protocol IP + light, that is, IP layer circuits are loaded on OTN layer circuits. Accordingly, the IP + Optical hybrid devices, i.e. the Packet Optical Transport Network (pots) functions of Network equipment manufacturers are becoming more and more powerful and mature. However, under the above background, how to perform efficient cutting and rapid and accurate repair on the IP + optical hybrid circuit is a problem that is crucial and worthy of study, and does not conflict with the existing cutting and connecting method for the OTN layer circuit.
In view of the above, overcoming the drawbacks of the prior art is an urgent problem in the art.
Disclosure of Invention
The present invention provides a method for discretizing and repairing a circuit carrying an IP layer on an OTN layer circuit, which aims to effectively solve the discretization and repair of the circuit carrying the IP layer on the OTN layer circuit, thereby solving the technical problem of discretization and repair of the circuit carrying the IP layer on the OTN layer circuit, so as to facilitate the cutting of a line disk and a connecting fiber of a POTN network element when the circuit carrying the IP layer on the OTN layer circuit.
In order to achieve the above object, according to an aspect of the present invention, there is provided a method for discretizing and repairing a circuit on an IP layer carried over an OTN layer circuit, where a POTN network element is used in a network management system to configure an optical hybrid circuit of a complete IP protocol, and if the POTN network element is replaced, the IP layer circuit is cut from a complete state to a discrete state, and the method for repairing includes:
reestablishing a client layer of an IP layer circuit on the POTN network element, establishing a new PVE port to be bound with the POTN network element, and reestablishing an IP layer Tunnel cross on the POTN network element based on the PVE port;
and performing inverse calculation of the OTN layer circuit, repairing the OTN layer circuit into a complete end-to-end circuit, repairing the OTN layer circuit into a complete state from a discrete state, triggering the IP layer circuit carried on the OTN layer circuit to repair, and recovering the service layer of the IP layer circuit, so that the IP layer circuit carried on the whole OTN layer circuit completes the repair.
As a further improvement and complement to the above solution, the present invention also comprises the following additional technical features.
Preferably, the specific method for reestablishing an IP layer Tunnel intersection includes:
acquiring a PVE port bound to an ODUk (k is 0, 1, 2, 3, 4) layer circuit source end in a repaired OTN layer circuit, recording the PVE port as PVE1, traversing all IP layer Tunnel intersections in the intersection configuration of a source network element, judging whether a sink port of the Tunnel intersection is PVE1, and recording the Tunnel as Tunnel1 if the sink port of the Tunnel intersection is PVE 1;
acquiring a PVE port bound by a repaired ODUk layer circuit sink end, recording the PVE port as PVE2, traversing all IP layer Tunnel intersections in the intersection configuration of a sink network element, judging whether a source port of the Tunnel intersection is PVE2, if so, recording the Tunnel, and recording the Tunnel as Tunnel 2;
the Tunnel1 and the Tunnel2 are the same end-to-end Tunnel circuit and are respectively cross-mapped on a source-sink network element, and the Tunnel1 and the Tunnel2 are merged and spliced to restore a complete end-to-end Tunnel.
Preferably, the reestablishing the client layer of the IP layer circuit on the pots n element specifically includes:
adding a new edge POTN network element or an intermediate over-station POTN network element, configuring a line disk of the new edge POTN network element or the intermediate over-station POTN network element, recovering optical fiber connection, and reestablishing ODUk electrical crossing on the new edge POTN network element or the intermediate over-station POTN network element.
Preferably, the specific method for repairing the OTN layer circuit into a complete end-to-end circuit includes:
and repairing an OCH layer circuit and an ODUk layer circuit in an OTN layer circuit into a complete end-to-end circuit in sequence, when the ODUk layer circuit is repaired, triggering an IP layer circuit carried on the ODUk layer circuit to carry out Tunnel repair, repairing the discrete state into the complete state, and resetting the repaired ODUk layer and Tunnel into a service layer and client layer relationship respectively.
Preferably, the specific method for inverse calculation of the OTN layer circuit includes:
splitting the discrete service and the single-station service into a plurality of discrete nodes according to the network element, and selecting one discrete node as an initial discrete node to start back calculation;
finding out an output port, a service layer port and a service layer business object according to the input port of the discrete node network element;
finding a host network element port according to the service layer service object, and finding a client layer port according to the host network element port;
according to the client layer port found by the host network element, a discrete node network element and a discrete node network element output port are further found until the discrete service end point, and the discrete nodes obtained by inverse calculation are spliced into an end-to-end service.
Preferably, the specific method for inverse calculation of the OTN layer circuit includes: for an ODUk layer port, a client layer port time slot of a source network element is firstly acquired, and a client layer port of a host network element is acquired according to the client layer port time slot of the source network element and a service layer port of the host network element.
Preferably, the direction selection of the OTN layer circuit inverse calculation specifically includes:
when a discrete node is selected as an initial discrete node to start back calculation, a source-destination discrete node of an end-to-end service is selected as the initial discrete node to perform back calculation in one direction;
or selecting an intermediate node of the end-to-end service as an initial discrete node, performing back calculation in two directions, and splicing two back calculation results into a final back calculation result.
Preferably, the finding an egress port, a service layer port, and a service layer service object according to an ingress port of a discrete node network element includes:
finding a service layer port according to the network element output port, and finding a service layer service object according to the service layer port;
if the service layer object does not exist, continuously searching a service layer service port and a service layer service object according to the service layer port until reaching an OCH layer; if the service layer object is not found in the OCH layer, the service back calculation fails;
if the service layer business object is found, the back calculation is continued.
Preferably, the discrete node network element and the discrete node network element output port are further found according to the client layer port found by the host network element until the discrete service end point, and the discrete nodes obtained by the back calculation are spliced into an end-to-end service, and the specific method includes:
finding a discrete node according to a client layer port of a host network element, and acquiring an output port of a network element of the discrete node;
judging whether the output port is the service end point of the layer; if the service destination is not the service destination of the layer, splicing the next discrete node of the layer until the service destination of the layer; if the service is the end point of the layer, continuing splicing according to the client layer service of the layer until the end point of the discrete service, and splicing the discrete nodes obtained by inverse calculation into an end-to-end service.
According to another aspect of the present invention, there is provided a repair system for a circuit carrying an IP layer over an OTN layer circuit, the system comprising:
a splitting module to: splitting the discrete service and the single station service into a plurality of discrete nodes according to network elements;
a back-calculation module to: selecting a discrete node as an initial discrete node to start inverse calculation, and finding out an output port, a client layer port and a client layer service object according to a network element input port of the discrete node; finding a host network element port according to the client layer service object, and finding a client layer port according to the host network element port; finding out a discrete node network element and an output port of the discrete node network element according to the client layer port of the host network element until a discrete service end point, and splicing the discrete nodes obtained by inverse calculation into an end-to-end service.
Generally, compared with the prior art, the technical scheme of the invention has the following beneficial effects:
when a circuit disc or a connection fiber deletion/replacement cut-over is performed on a circuit of an IP layer carried on an OTN layer circuit established on a POTN network element, an incomplete discrete circuit needs to be correctly formed by a complete IP + optical circuit managed by a network manager, on one hand, the necessary foundation is needed for a subsequent repair operation and then a complete circuit is formed again, and on the other hand, a user can visually see the discrete current situation of the circuit after the cut-over operation.
Drawings
Fig. 1 is a flowchart of a network element cross Tunnel splicing algorithm according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a fiber deletion between circuit boards according to an embodiment of the present invention;
fig. 3 is a schematic diagram of deleting fibers in a POTN network element according to an embodiment of the present invention;
fig. 4 is a schematic diagram of a line disk deletion of an edge POTN network element according to an embodiment of the present invention;
fig. 5 is a schematic diagram of deleting a line disk of an intermediate outbound POTN network element according to an embodiment of the present invention;
fig. 6 is a schematic diagram of deleting an intermediate outbound POTN element according to an embodiment of the present invention;
fig. 7 is a schematic diagram of deletion of an edge POTN network element according to an embodiment of the present invention;
FIG. 8 is a diagram of a discrete business abstraction model according to an embodiment of the present invention;
FIG. 9 is a flowchart illustrating an electrical-layer discrete service back-calculation method according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. In addition, the technical features involved in the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
In the description of the present invention, the terms "inner", "outer", "longitudinal", "lateral", "upper", "lower", "top", "bottom", and the like indicate orientations or positional relationships based on those shown in the drawings, and are for convenience only to describe the present invention without requiring the present invention to be necessarily constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention.
The first embodiment is as follows:
in order to effectively solve the problem of repairing a circuit board and a fiber connection of a pots n network element in an optical hybrid circuit carrying an IP protocol after performing a cutting operation, in one embodiment, a repairing method for an optical hybrid circuit carrying an IP protocol is provided, where a pots n network element is used in a network management system to configure an optical hybrid circuit carrying an IP protocol completely, and if the pots n network element is replaced, an IP layer circuit is cut from a complete state to a discrete state, and the repairing method includes:
and reestablishing a client layer of an IP layer circuit on the POTN network element, establishing a new PVE port to be bound with the POTN network element, and reestablishing an IP layer Tunnel cross on the POTN network element based on the PVE port.
The Private VLAN Edge (PVE) can isolate each user from the link layer, and the PVE does not separately partition a VLAN for each user, thereby effectively solving the problem of isolating users by using VLANs.
And performing inverse calculation of the OTN layer circuit, repairing the OTN layer circuit into a complete end-to-end circuit, repairing the OTN layer circuit into a complete state from a discrete state, triggering the IP layer circuit carried on the OTN layer circuit to repair, and recovering the service layer of the IP layer circuit, so that the IP layer circuit carried on the whole OTN layer circuit completes the repair.
As the edge PTON network element or the intermediate overbooking POTN network element is replaced, all OTN layer and IP layer circuits on the network element fail, and all OTN layer circuits (such as OCH layer and ODUk layer) and client layer tunnels of the IP layer circuits passing through the network element become discrete states. When repairing, firstly adding a new edge PTON network element or a middle over-station POTN network element, and configuring a line disk, wherein the line disk is a single disk of a network side connecting optical fiber and is a relative concept with a user side single disk of an access user service; the fiber optic connection is then restored. On the basis of physical configuration recovery, an ODUk layer electrical cross is reestablished on the network element, a PVE port is newly established to be bound with the ODUk layer electrical cross, and an IP layer Tunnel cross is reestablished on the network element on the basis of the PVE port. And then performing OTN layer circuit back calculation, sequentially restoring the OCH layer and ODUk layer circuits into a complete end-to-end circuit, when the ODUk circuit is restored, triggering a client layer Tunnel of an IP layer circuit carried on the ODUk circuit to restore, and resetting the restored ODUk and Tunnel into a service layer and client layer relationship.
In the first embodiment, the client layer of the IP layer circuit is repaired first, and then the service layer of the IP layer circuit is repaired continuously. When a circuit board and a connecting fiber of a POTN network element in an optical hybrid circuit bearing an IP protocol are cut over, the optical hybrid circuit which is managed by a network manager and completely bears the IP protocol needs to correctly form an incomplete discrete circuit, on one hand, the necessary foundation for repairing operation and then reforming the complete circuit is needed, and on the other hand, a user can visually see the discrete current situation of the circuit after the cut-over operation.
And configuring a complete optical hybrid circuit service carrying an IP protocol by using a POTN network element in a network management system. The optical hybrid circuit customer layer bearing the IP protocol is respectively a physical optical fiber, an OCH, an ODUk (k is 0, 1, 2, 3, 4) and a Tunnel from bottom to top, wherein the lower layer service is a service layer of the upper layer service, and the upper layer service is a customer layer of the lower layer service; services belonging to an optical layer are OCH and ODUk, services belonging to an IP layer are Tunnel, the IP layer services are encapsulated into the optical layer services through PVE interfaces, and the PVE interfaces are bound with the ODUk with the smallest particles.
In the ODUk (k is 0, 1, 2, 3, 4), the current maximum allowable value of k is 4, k represents a bandwidth value that can be carried on the OTN optical path, and the ODU0 carries 1G bandwidth; ODU1 carries 2.5G bandwidth; ODU2 carries 10G bandwidth; ODU3 carries 40G bandwidth; the ODU4 carries 100G bandwidth; the value of k depends on the traffic bandwidth established by the user.
In a network management system, both an OTN layer circuit and an IP layer circuit need to record the current affiliated level, the relation between a service layer and a client layer related to the current affiliated level, and simultaneously record a network element ID set passed by the circuit, and the upper and lower level incidence relation of each end-to-end circuit and the network element passed by the circuit can be clarified through the data record.
In addition, each network element also needs to record cross data generated by the circuits on the network element, and the main information includes network element cross ID, hierarchy, service layer circuit ID, client layer circuit ID set, source port, and sink port, and combines the information model records of the end-to-end circuit and the network element cross, that is, the hierarchical relationship between the upper and lower circuits and the cross condition of each circuit on the network element passed by can be clarified.
The user performs a cutover operation on the optical hybrid circuit which has been created to carry the complete IP protocol by using the network management system, and the specific operation may be to delete and modify the connecting fiber, delete and replace the circuit board, or delete and replace the network element, and enter a corresponding functional scene according to the user's operation of the network management system.
In order to reestablish the client layer of the IP layer circuit, because a pots n element in the optical hybrid circuit carrying the IP protocol is replaced to cause dispersion, in combination with the embodiment of the present invention, there is also a preferred implementation, and specifically, as shown in fig. 1, the specific method for reestablishing the IP layer Tunnel intersection includes:
acquiring a PVE port bound by an ODUk layer circuit source end in a repaired OTN layer circuit, recording the PVE port as PVE1, traversing all IP layer Tunnel intersections in the intersection configuration of a source network element, judging whether a sink port of the Tunnel intersection is PVE1, and recording the Tunnel as Tunnel1 if the sink port of the Tunnel intersection is PVE 1.
Acquiring a PVE port bound by a repaired ODUk layer circuit sink, recording the PVE port as PVE2, traversing all IP layer Tunnel intersections in the intersection configuration of the sink network element, judging whether a source port of the Tunnel intersection is PVE2, if so, recording the Tunnel, and recording the Tunnel as Tunnel 2.
The tunnels 1 and 2 are the same end-to-end Tunnel circuit, and respectively merge and splice tunnels 1 and 2 into a complete end-to-end Tunnel by crossing on a source-sink network element.
The circuit is a linear path and is formed by connecting a plurality of network elements in series, and the sink network element refers to a termination network element of the circuit. The cross is used for appointing to switch the MPLS message from a preset input port to a preset output port and carrying out PUSH, SWAP or POP processing of the MPLS label, which is a common means of a person skilled in the art; the expression forms of Tunnel1 and Tunnel2 mainly include 4 information, namely an inlet port, an inlet label, an outlet port and an outlet label; splicing is to connect the tunnels of a plurality of network elements in series to form an end-to-end Tunnel, wherein the end-to-end Tunnel consists of the tunnels of the plurality of network elements; and reserving the Tunnel cross information of each network element.
In order to recover the client layer of the IP layer circuit, in combination with the embodiment of the present invention, there is also a preferred implementation scheme, specifically, the reestablishing the client layer of the IP layer circuit on the pots n network element specifically includes:
adding a new edge POTN network element or an intermediate over-station POTN network element, configuring a line disk of the new edge POTN network element or the intermediate over-station POTN network element, recovering optical fiber connection, and reestablishing ODUk electrical crossing on the new edge POTN network element or the intermediate over-station POTN network element.
The reestablishment refers to manually creating network element level ODUk electrical crossing on a new edge POTN network element or an intermediate over-station POTN network element; the value of k depends on the level of bandwidth currently needed to make the electrical crossover.
In order to recover the service layer of the IP layer circuit, in combination with the embodiment of the present invention, there is also a preferred implementation scheme, and specifically, a specific method when the OTN layer circuit is repaired into a complete end-to-end circuit includes:
an OCH layer circuit and an ODUk layer circuit in an OTN layer circuit are sequentially repaired into a complete end-to-end circuit, an ODUk is a service layer circuit of a Tunnel, the Tunnel is a client layer circuit of the ODUk, the ODUk and the ODUk are associated through PVE ports, when the ODUk layer circuit is repaired, the k value depends on the service bandwidth of a current user, an IP layer circuit borne on the ODUk layer circuit is triggered to carry out Tunnel repair, the repaired ODUk layer and the repaired Tunnel are respectively reset into the relationship between the service layer and the client layer, the reset means that in a system code, the ODUk circuit has a client layer circuit ID attribute, and the ID of the Tunnel is set; the Tunnel circuit also has a service layer circuit ID attribute, and the ID of the ODUk is set in; thereby the OTN layer circuit is repaired into a complete end-to-end circuit.
In order to satisfy the diversity of the user cutover operation, in combination with the embodiment of the present invention, there is also a preferred implementation scheme, and specifically, the cutover specifically includes a cutover operation performed on one or more of a POTN network element, a line disk, and a connection fiber that carry an IP layer circuit service on the OTN layer circuit.
In this embodiment, each cutting method can only occur once at the same time, or the cutting method is sequentially executed according to the sequence of modifying the connection fibers between the line disks of the POTN network elements, replacing the line disk of the edge POTN network element, replacing the line disk of the middle overstock POTN network element, replacing the edge POTN network element, replacing the middle overstock POTN network element, and modifying the fibers in the POTN network element, or the reverse sequence.
The first method is as follows: for modifying the fiber connection between the line disks of the POTN network element or modifying the fiber connection within the POTN network element, as shown in fig. 2 and fig. 3, since only optical layer signals are transmitted on the fiber connection between the line disks of the POTN network element, only the OCH layer circuit is changed from a complete state to a discrete state, the ODUk circuit carried on the OCH circuit needs to clear the service layer, and the client layer Tunnel of the IP layer circuit carried on the ODUk circuit is not affected;
when the connection between the network element line disks is deleted, the original OCH circuits passing through the ports at the two ends of the optical fiber become discrete states, that is, the end-to-end OCH circuits are deleted together, only the network element-level OCH cross data are kept on the network elements at the two ends and are kept unchanged, and only the two network elements lose contact. Since the end-to-end OCH circuit is deleted, the discrete OCH circuit ID is removed from the service layer circuit ID recorded in the customer layer ODUk circuit carried by the OCH circuit.
When the optical fiber is reconnected, discrete repair can be triggered, the repair algorithm is to judge the wavelengths configured on the ports at the two ends of the optical fiber, and if the wavelengths are the same, an end-to-end OCH circuit can be formed again. Because the network element cross data of the network elements at the two ends reserves the customer layer ODUk circuit ID of the original OCH circuit, the network element data can be utilized to restore the service layer customer layer incidence relation of the end-to-end OCH circuit and the ODUk circuit.
The specific recovery method comprises the following steps: when the connection between the line disks is reconnected and restored, a complete OCH circuit can be formed by searching again according to the wavelength of the ports at the two ends of the connection, and then the OCH circuit is restored and set as the service layer of the ODUk circuit.
The second method comprises the following steps: for a line disk of a replacement edge POTN network element, as shown in fig. 4, because the line disk of the edge POTN network element needs to encapsulate an IP packet into an OTN electrical layer signal, the implementation is implemented by binding a PVE port with an ODUk, but after the line disk of the edge POTN network element is deleted, the ODUk signal crossing of the disk will also be deleted synchronously, so the binding relationship between the ODUk and the PVE must be released, but the PVE interface does not need to be deleted; because the line disk is deleted, both OCH and ODUk circuits of the OTN are completely changed into discrete states, and a client layer Tunnel of an IP layer circuit carried on the ODUk needs to clear a service layer, which does not affect the complete state of the client layer Tunnel of the IP layer circuit.
In the hybrid circuit of IP + light, the ODUk is a service layer circuit of Tunnel, and Tunnel is a client layer circuit of ODUk, which are associated through PVE ports. The PVE port is a network element-level packet virtual port, and is bound to a cross port of an ODUk, so the PVE port records the bound ODUk port in addition to its own port attribute.
The third method comprises the following steps: for the IP layer circuit Tunnel carried on the ODUk, the service layer circuit ID is the ODUk circuit ID, the source or sink port in the network element cross is the PVE port, and the source or sink depends on the location of the network element.
As the line disk is deleted, both the optical layer network element level circuits OCH and ODUk passing through the disk are deleted, the corresponding end-to-end OCH and ODUk become discrete states, and the network element level PVE port is reserved but needs to clear the bound ODUk. After an ODUk is newly created on a replacement line disk, the newly created ODUk needs to be bound with an original PVE interface, then an OTN layer circuit reverse calculation is executed, OCH and ODUk circuits are repaired, after the ODUk circuits are repaired, a client layer Tunnel ID of an associated IP layer circuit in the PVE interfaces bound at two ends of the ODUk needs to be judged, if the IDs are the same, the IP layer service can be judged to be a client layer of the ODUk circuit, and thus the upper-lower level relation between the end-to-end ODUk and the IP layer service Tunnel is restored.
The specific repairing method comprises the following steps: and adding a line disk again at the same slot position, reestablishing ODUk electric cross on the network element, and rebinding the newly-built ODUk with the original PVE interface. Then, performing OTN layer circuit back calculation, repairing OCH and ODUk circuits, when repairing the ODUk circuit, judging whether client layer Tunnel IDs of IP layer circuits related to PVE ports at two ends of the ODUk circuit are the same, if so, taking ODUk circuit recovery equipment as a service layer of the client layer Tunnel of the IP layer circuit; if not, the process fails.
The method is as follows: for the line panel for replacing the edge POTN network element, as shown in fig. 5, if the crossing form of the intermediate transstation network element is optical crossing, the OCH layer circuit is changed from complete to discrete state, the network pipe is a uniformly distributed IP layer circuit, so that a damaged discrete state cannot be formed, an ODUk circuit carried on the OCH circuit needs to clear a service layer, and a client layer Tunnel of the IP layer circuit carried on the ODUk circuit is not affected; if the cross form of the intermediate cross-station network element is electrical cross, the OCH and ODUk circuits of the OTN are both completely changed into discrete states, and if the ODUk circuit with the smallest particles is discrete, the service layer needs to be cleared from the client layer Tunnel of the IP layer circuit carried on the ODUk, without affecting the complete state of the client layer Tunnel of the IP layer circuit; until the customer layer Tunnel of the IP layer circuit is not affected if the ODUk circuit with the smallest particles is not discretized. The ODUk circuit of the smallest particle means a circuit when k is 0.
If the cross form of the line panel of the intermediate station-passing network element is optical cross, the specific repairing method comprises the following steps: and reconnecting the connecting fiber between the recovery line disks, searching again according to the wavelength of ports at two ends of the connecting fiber to form a complete OCH circuit, and then restoring and setting the OCH circuit as a service layer of the ODUk circuit.
If the cross form of the line panel of the intermediate station-passing network element is electrical cross, the specific repairing method comprises the following steps: and adding a line disk again at the same slot position, reestablishing ODUk electric cross on the network element, and rebinding the newly-built ODUk with the original PVE interface. Then, performing OTN layer circuit back calculation, repairing OCH and ODUk circuits, when repairing the ODUk circuit, judging whether client layer Tunnel IDs of IP layer circuits related to PVE ports at two ends of the ODUk circuit are the same, if so, taking ODUk circuit recovery equipment as a service layer of the client layer Tunnel of the IP layer circuit; if not, the process fails.
The fifth mode is as follows: for replacing an edge POTN network element or replacing an intermediate over-site POTN network element, as shown in fig. 6 and 7, all OTN layer circuits and IP layer circuits passing through the network element are completely changed into a discrete state.
The specific repairing method comprises the following steps: firstly, adding a new edge POTN network element or replacing an intermediate cross-station POTN network element, configuring a line disk, and then recovering optical fiber connection. On the basis of physical configuration recovery, the ODUk electrical cross is reestablished on the network element, a PVE port is newly established to be bound with the PVE port, and an IP layer Tunnel cross is reestablished on the network element on the basis of the PVE port. And then performing OTN circuit back calculation, sequentially restoring the OCH and ODUk circuits into a complete end-to-end circuit, when the ODUk circuit is restored, triggering Tunnel restoration of an IP layer circuit loaded on the ODUk circuit, and resetting the restored ODUk and Tunnel as a service layer and client layer relationship.
In this embodiment, a specific method for inverse calculation of an OTN layer circuit includes: each discrete service can be split into a plurality of discrete nodes according to the network element, each discrete node identifies an ingress port and an egress port (there is also a possibility that only the ingress port or the egress port) in a single network element, and each single station service can also be represented by a discrete node model. A discrete node is the smallest irrevocable unit of discrete traffic. The discrete service reverse calculation is a process of splitting the discrete service and the single station service into a plurality of discrete nodes, and then recombining and splicing the discrete nodes into a complete end-to-end service.
As shown in fig. 8, the discrete services [ a-F ] may be split into discrete node network elements 1[ a-B ], network elements 3[ E-F ], and the network element 2 single site service may be represented as a discrete node network element 2[ C-D ].
As shown in fig. 9, an embodiment of the present invention provides a specific method for performing inverse calculation on an OTN layer circuit, including the following steps:
s10: and splitting the discrete service and the single-station service into a plurality of discrete nodes according to the network element, and selecting one discrete node as an initial discrete node to start inverse calculation. The initial discrete node preferentially selects the source and destination discrete nodes of the end-to-end service, because the source and destination discrete nodes only need to be spliced towards one direction, if the intermediate discrete node is the intermediate discrete node, the source and destination discrete nodes need to be spliced towards two directions at the same time, and then the splicing results are merged into the end-to-end service.
S20: and finding out an output port according to an input port in the discrete node network element, wherein if the discrete node has only one port, the input port and the output port are the same port. Finding service layer service port P2 according to network element internal output port P1, finding service layer service object according to the service layer port P2, if the service layer object does not exist, continuing to find service layer service port and service layer service object according to port P2 until OCH layer (optical path sub-layer network). Since the electrical layer service must rely on the OCH layer, if the OCH layer service object does not exist, the electrical layer service back calculation fails.
S30: and finding the port of the host network element according to the service layer object, and finding the port of the client layer according to the port of the host network element. For an ODUk layer port, a client layer port time slot of a source network element is firstly acquired, and a client layer port of a host network element is acquired according to the client layer port time slot of the source network element and a service layer port of the host network element.
S40: according to the client layer port found by the host network element, further finding a discrete node network element and a discrete node network element output port, and judging whether the port is the service end point of the layer; if the node is not the service end point of the layer, jumping to step S20, splicing the next discrete node until the service end point of the layer; if the service end point is the service end point of the layer, the step S30 is skipped to splice the service of the client layer until the service level of the initial discrete node, and the discrete nodes obtained by inverse calculation are spliced into an end-to-end service.
Example two:
this embodiment two provides a repair system that bears IP layer circuit on OTN layer circuit, in order to effectively solve the repair processing problem after performing the cut-and-splice operation on the line disk or the connecting fiber of the OTN network element in the optical hybrid circuit that bears the IP protocol, the system includes:
a splitting module to: and splitting the discrete service and the single-station service into a plurality of discrete nodes according to the network element.
A back-calculation module to: selecting a discrete node as an initial discrete node to start inverse calculation, and finding out an output port, a service layer port and a service layer business object according to a network element input port of the discrete node; finding a host network element port according to the service layer service object, and finding a client layer port according to the host network element port; finding out a discrete node network element and an output port of the discrete node network element according to the client layer port of the host network element until a discrete service end point, and splicing the discrete nodes obtained by inverse calculation into an end-to-end service.
In combination with the embodiment of the present invention, there is also a preferred implementation scheme, and specifically, the back calculation module is further configured to select a back calculation direction of the OTN layer circuit: when a discrete node is selected as an initial discrete node to start back calculation, a source-destination discrete node of the end-to-end service is selected as the initial discrete node to perform back calculation in one direction.
Or selecting an intermediate node of the end-to-end service as an initial discrete node, performing back calculation in two directions, and splicing two back calculation results into a final back calculation result.
In combination with the embodiment of the present invention, there is also a preferred implementation scheme, and specifically, the back calculation module finds the egress port, the service layer port, and the service layer service object according to the ingress port of the discrete node network element, which specifically includes the following steps:
and finding a service layer port according to the network element outlet port, and finding a service layer service object according to the service layer port.
If the service layer object does not exist, continuously searching a service layer service port and a service layer service object according to the service layer port until reaching an OCH layer; and if the service layer object is not found in the OCH layer, the service back calculation fails.
If the service layer business object is found, the back calculation is continued.
With reference to the embodiment of the present invention, there is also a preferred implementation scheme, and specifically, the back calculation module finds a port of a sink network element according to a service layer service object, and finds a port of a client layer according to the port of the sink network element, which specifically includes the following steps:
for an ODUk layer port, a client layer port time slot of a source network element is firstly acquired, and a client layer port of a host network element is acquired according to the client layer port time slot of the source network element and a service layer port of the host network element. In combination with the embodiment of the present invention, there is also a preferred implementation scheme, and specifically, the discrete node network element and the discrete node network element output port are further found according to the client layer port found by the host network element until the discrete service end point is reached, and the discrete nodes obtained by inverse computation are spliced into an end-to-end service, where the specific method includes:
and finding out the discrete node according to the client layer port of the host network element, and acquiring the output port of the discrete node network element.
Judging whether the output port is the service end point of the layer; if the service destination is not the service destination of the layer, splicing the next discrete node of the layer until the service destination of the layer; if the service is the end point of the layer, continuing splicing according to the client layer service of the layer until the end point of the discrete service, and splicing the discrete nodes obtained by inverse calculation into an end-to-end service.
It will be understood by those skilled in the art that the foregoing is only a preferred embodiment of the present invention, and is not intended to limit the invention, and that any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (10)
1. A method for repairing an optical hybrid circuit carrying an IP protocol is characterized in that a POTN network element is used in a network management system to configure the optical hybrid circuit carrying the IP protocol completely, if the POTN network element is replaced, an IP layer circuit is cut from a complete state into a discrete state, and the method comprises the following steps:
reestablishing a client layer of an IP layer circuit on the POTN network element, establishing a new PVE port to be bound with the POTN network element, and reestablishing an IP layer Tunnel cross on the POTN network element based on the PVE port;
and performing inverse calculation of the OTN layer circuit, repairing the OTN layer circuit into a complete end-to-end circuit, repairing the OTN layer circuit into a complete state from a discrete state, triggering the IP layer circuit carried on the OTN layer circuit to repair, and recovering the service layer of the IP layer circuit, so that the IP layer circuit carried on the whole OTN layer circuit completes the repair.
2. The method for repairing an optical hybrid circuit carrying an IP protocol according to claim 1, wherein the specific method for reestablishing an IP layer Tunnel cross comprises:
acquiring a PVE port bound to an ODUk (k is 0, 1, 2, 3, 4) layer circuit source end in a repaired OTN layer circuit, recording the PVE port as PVE1, traversing all IP layer Tunnel intersections in the intersection configuration of a source network element, judging whether a sink port of the Tunnel intersection is PVE1, and recording the Tunnel as Tunnel1 if the sink port of the Tunnel intersection is PVE 1;
acquiring a PVE port bound by a repaired ODUk layer circuit sink end, recording the PVE port as PVE2, traversing all IP layer Tunnel intersections in the intersection configuration of a sink network element, judging whether a source port of the Tunnel intersection is PVE2, if so, recording the Tunnel, and recording the Tunnel as Tunnel 2;
the Tunnel1 and the Tunnel2 are the same end-to-end Tunnel circuit and are respectively cross-mapped on a source-sink network element, and the Tunnel1 and the Tunnel2 are merged and spliced to restore a complete end-to-end Tunnel.
3. The method according to claim 1, wherein the reestablishing the client layer of the IP layer circuit on the POTN network element specifically includes:
adding a new edge POTN network element or an intermediate over-station POTN network element, configuring a line disk of the new edge POTN network element or the intermediate over-station POTN network element, recovering optical fiber connection, and reestablishing ODUk electrical crossing on the new edge POTN network element or the intermediate over-station POTN network element.
4. The method for repairing an optical hybrid circuit according to claim 1, wherein the specific method for repairing the OTN layer circuit into a complete end-to-end circuit comprises:
and repairing an OCH layer circuit and an ODUk layer circuit in an OTN layer circuit into a complete end-to-end circuit in sequence, when the ODUk layer circuit is repaired, triggering an IP layer circuit carried on the ODUk layer circuit to carry out Tunnel repair, repairing the discrete state into the complete state, and resetting the repaired ODUk layer and Tunnel into a service layer and client layer relationship respectively.
5. The method for repairing an optical hybrid circuit carrying an IP protocol according to claim 1, wherein the specific method for performing inverse calculation on the OTN layer circuit comprises:
splitting the discrete service and the single-station service into a plurality of discrete nodes according to the network element, and selecting one discrete node as an initial discrete node to start back calculation;
finding out an output port, a service layer port and a service layer business object according to the input port of the discrete node network element;
finding a host network element port according to the service layer service object, and finding a client layer port according to the host network element port;
according to the client layer port found by the host network element, a discrete node network element and a discrete node network element output port are further found until the discrete service end point, and the discrete nodes obtained by inverse calculation are spliced into an end-to-end service.
6. The method for repairing an optical hybrid circuit carrying an IP protocol according to claim 5, wherein the specific method for performing inverse calculation on the OTN layer circuit comprises: for an ODUk layer port, a client layer port time slot of a source network element is firstly acquired, and a client layer port of a host network element is acquired according to the client layer port time slot of the source network element and a service layer port of the host network element.
7. The method for repairing an optical hybrid circuit carrying an IP protocol according to claim 6, wherein the direction selection of the OTN layer circuit back calculation specifically includes:
when a discrete node is selected as an initial discrete node to start back calculation, a source-destination discrete node of an end-to-end service is selected as the initial discrete node to perform back calculation in one direction;
or selecting an intermediate node of the end-to-end service as an initial discrete node, performing back calculation in two directions, and splicing two back calculation results into a final back calculation result.
8. The method according to claim 6, wherein the finding of the egress port, the service layer port, and the service layer service object according to the ingress port of the discrete node network element comprises:
finding a service layer port according to the network element output port, and finding a service layer service object according to the service layer port;
if the service layer object does not exist, continuously searching a service layer service port and a service layer service object according to the service layer port until reaching an OCH layer; if the service layer object is not found in the OCH layer, the service back calculation fails;
if the service layer business object is found, the back calculation is continued.
9. The method according to claim 6, wherein the discrete nodes obtained by inverse calculation are spliced into an end-to-end service by further finding the egress ports of the discrete node network element and the discrete node network element according to the client layer port found by the host network element until the discrete service endpoint, and the method comprises:
finding a discrete node according to a client layer port of a host network element, and acquiring an output port of a network element of the discrete node;
judging whether the output port is the service end point of the layer; if the service destination is not the service destination of the layer, splicing the next discrete node of the layer until the service destination of the layer; if the service is the end point of the layer, continuing splicing according to the client layer service of the layer until the end point of the discrete service, and splicing the discrete nodes obtained by inverse calculation into an end-to-end service.
10. A repair system for a circuit carrying an IP layer over an OTN layer circuit, the system comprising:
a splitting module to: splitting the discrete service and the single station service into a plurality of discrete nodes according to network elements;
a back-calculation module to: selecting a discrete node as an initial discrete node to start inverse calculation, and finding out an output port, a client layer port and a client layer service object according to a network element input port of the discrete node; finding a host network element port according to the client layer service object, and finding a client layer port according to the host network element port; finding out a discrete node network element and an output port of the discrete node network element according to the client layer port of the host network element until a discrete service end point, and splicing the discrete nodes obtained by inverse calculation into an end-to-end service.
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