CN105703936B - Control method, control device and main control board - Google Patents
Control method, control device and main control board Download PDFInfo
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- CN105703936B CN105703936B CN201410710381.2A CN201410710381A CN105703936B CN 105703936 B CN105703936 B CN 105703936B CN 201410710381 A CN201410710381 A CN 201410710381A CN 105703936 B CN105703936 B CN 105703936B
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- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L41/00—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
- H04L41/34—Signalling channels for network management communication
Abstract
The embodiment of the invention provides a control method, a control device and a main control board. The control method comprises the following steps: judging whether a first data transmission path aiming at the first service between the first equipment and the first access equipment has a fault or not; when a first data transmission path between the first access device and the first device for the first service fails, sending an alarm message that the first data transmission path fails to the first access device through a second data transmission path between the first device and the first access device, so that the first access device can control a port of the first access link to be closed according to the alarm message, and the first client device cannot send data of the first service to the first access device through the first access link. The embodiment of the invention avoids unnecessary consumption of service data transmission resources.
Description
Technical Field
The present invention relates to the field of data transmission networks, and in particular, to a control method, apparatus and main control board.
Background
In the data transmission field, when one end of a user side has a fault, if the other end of the user side still transmits data to the end of the user side, the data transmission resource is wasted. For example, as in the scenario of fig. 1, two client devices CE1 (client edge device 1) and CE2 (client edge device 2) on a user side of a Packet Transport Network (PTN) communicate through access of two access devices PE1 (dual-homing node 1) and PE2 (dual-homing node 2) of the PTN Network, respectively, when a service data transmission path on the CE1 side fails (for example, an access link AC or a node failure), and the CE2 continues to transmit service data to the CE1, the CE1 does not receive the failure, thereby wasting service data transmission resources between the CE2 and the PE 1.
Disclosure of Invention
An object of the embodiments of the present invention is to provide a control method, an apparatus, and a main control board, so as to avoid unnecessary consumption of service data transmission resources when a data transmission path for a service between a client device and an access device fails.
In order to solve the above technical problem, an embodiment of the present invention provides the following solutions:
an embodiment of the present invention provides a control method, used in a control module, where the control module is configured to control a first access link, where the first access link is used to carry data transmission between a first client device and a first access device for a first service, and the first service is a service between the first client device and a first device, where the control method includes:
judging whether a first data transmission path aiming at the first service between the first equipment and the first access equipment has a fault or not;
when a first data transmission path between the first access device and the first device for the first service fails, sending an alarm message that the first data transmission path fails to the first access device through a second data transmission path between the first device and the first access device, so that the first access device can control a port of the first access link to be closed according to the alarm message, and the first client device cannot send data of the first service to the first access device through the first access link.
Preferably, the alarm message carries a first time index, and the alarm message indicating that the first data transmission path has a failure is sent to the first access device through a second data transmission path between the first device and the first access device, so that the first access device can control a port of the first access link to be closed according to the alarm message, and the first client device cannot send the data of the first service to the first access device through the first access link in the step where the first access device analyzes the first time index from the alarm message, and then the time for controlling the port to be closed meets the requirement of the first time index.
Preferably, the method further comprises the following steps:
after sending a warning message that the first data transmission path has a fault to the first access device through a second data transmission path between the first device and the first access device, determining whether the first data transmission path is recovered to be normal;
when the first data transmission path is recovered to be normal, sending a notification message that the first data transmission path is recovered to be normal to the first access device through a third data transmission path between the first device and the first access device, so that the first access device can control a port of the first access link to be opened according to the notification message, and the first client device can send the data of the first service to the first access device through the first access link.
Preferably, the notification message carries a second time index, and the notification message that the first data transmission path is recovered to normal is sent to the first access device through a third data transmission path between the first device and the first access device, so that the first access device can control the port of the first access link to be opened according to the notification message, and in the step of sending the data of the first service to the first access device through the first access link, after the first access device parses the second time index from the alarm message, the time for controlling the port to be opened meets the requirement of the second time index.
Preferably, the first device includes a network-side device, and the control module belongs to the network-side device.
Preferably, the first device includes a second access device, the control module belongs to the second access device, the first service is a service between the first client device and a second client device, data transmission of the first service between the second client device and the second access device is performed through a second access link, and the determining whether a first data transmission path for the first service between the first device and the first access device fails includes:
and judging whether the second access link fails, and if so, judging that a first data transmission path between the first access equipment and the first equipment for the first service fails.
Preferably, the alarm message carries a failure cause, where the failure cause is used for the first access device to analyze the failure cause from the alarm message and then use the analyzed failure cause as a cause for closing the port, where the first access device does not notify the control module that the first access link fails when the cause for closing the port is the failure cause; and when the reason of the port closing is other than the failure reason, notifying the control module that the first access link fails.
An embodiment of the present invention further provides a control apparatus, configured in a control module, where the control module is configured to control a first access link, the first access link is configured to carry data transmission between a first client device and a first access device for a first service, and the first service is a service between the first client device and a first device, where the control apparatus includes:
a first determining module, configured to determine whether a first data transmission path between the first device and the first access device for the first service fails;
a first sending module, configured to send, when a first data transmission path between the first access device and the first device for the first service fails, an alarm message indicating that the first data transmission path fails to be sent to the first access device through a second data transmission path between the first device and the first access device, so that the first access device can control a port of the first access link to be closed according to the alarm message, and the first client device cannot send data of the first service to the first access device through the first access link.
Preferably, the alarm message carries a first time indicator, and in the first sending module, after the first access device parses the first time indicator from the alarm message, the time to control the port to close meets the requirement of the first time indicator.
Preferably, the method further comprises the following steps:
a second determining module, configured to determine whether the first data transmission path is recovered to normal after sending an alarm message that the first data transmission path has a fault to the first access device through a second data transmission path between the first device and the first access device;
a second sending module, configured to send, when the first data transmission path returns to normal, a notification message that the first data transmission path returns to normal to the first access device through a third data transmission path between the first device and the first access device, so that the first access device can control a port of the first access link to be opened according to the notification message, and the first client device can send the data of the first service to the first access device through the first access link.
The embodiment of the invention also provides a main control board comprising the control device.
From the above, it can be seen that the embodiments of the present invention have at least the following beneficial effects:
when the first client device cannot reach the first device even though sending the first service data due to the fault of the first data transmission path between the first access device and the first device, the first client device cannot send the first service data to the first access device through the first access link between the first client device and the first access device, and therefore unnecessary consumption of data transmission resources of the first service is saved.
Drawings
FIG. 1 shows a schematic diagram of special line service triggering another end U side LST through one end U side fault in PTN
FIG. 2 is a flow chart illustrating the steps of a control method according to an embodiment of the present invention;
fig. 3 shows a schematic diagram of a dedicated line service triggering link state transparent transmission (LST) through network side fault detection in the PTN;
fig. 4 shows a schematic diagram of a private network service user side fault triggering LST in a PTN;
fig. 5 shows a schematic diagram of a fault triggering LST on the network side of a private network service in a PTN;
FIG. 6 shows an interactive pictorial view of the LST close (down) process in the PTN;
FIG. 7 shows an interaction diagram of the LST opening (up) process in the PTN;
FIG. 8 is a diagram illustrating deadlock in a PTN;
fig. 9 is a block diagram of a control device according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the embodiments of the present invention will be described in detail with reference to the accompanying drawings and specific embodiments.
Fig. 2 is a flowchart illustrating steps of a control method according to an embodiment of the present invention, and referring to fig. 2, an embodiment of the present invention provides a control method, where the control module is configured to control a first access link, where the first access link is used to carry data transmission between a first client device and a first access device for a first service, and the first service is a service between the first client device and the first access device, where the control method includes the following steps:
The control method is used for a control module.
Therefore, through the above manner, even if the first client device sends the first service data, the first client device cannot send the data of the first service to the first access device through the first access link between the first client device and the first access device when the first client device cannot reach the first device due to the failure of the first data transmission path between the first access device and the first device, thereby saving unnecessary consumption of data transmission resources of the first service.
In the embodiment of the present invention, there may be:
the first device comprises a network side device, and the control module belongs to the network side device.
Alternatively, there may be:
the first device includes a second access device, the control module belongs to the second access device, the first service is a service between the first client device and a second client device, data transmission of the first service between the second client device and the second access device is performed through a second access link, and the determining whether a first data transmission path between the first device and the first access device for the first service fails includes:
and judging whether the second access link fails, and if so, judging that a first data transmission path between the first access equipment and the first equipment for the first service fails.
The control module, for example: a main control panel.
Considering that the fast switching requirement of using the event to perform protection switching cannot be met due to the long time for closing the port, the following may be performed:
the alarm message carries a first time index, and the alarm message indicating that the first data transmission path has a fault is sent to the first access device through a second data transmission path between the first device and the first access device, so that the first access device can control a port of the first access link to be closed according to the alarm message, and the first client device cannot send the data of the first service to the first access device through the first access link.
In the embodiment of the present invention, the method may further include:
after sending a warning message that the first data transmission path has a fault to the first access device through a second data transmission path between the first device and the first access device, determining whether the first data transmission path is recovered to be normal;
when the first data transmission path is recovered to be normal, sending a notification message that the first data transmission path is recovered to be normal to the first access device through a third data transmission path between the first device and the first access device, so that the first access device can control a port of the first access link to be opened according to the notification message, and the first client device can send the data of the first service to the first access device through the first access link.
Considering that the fast switching requirement of using the event to perform protection switching cannot be met due to the long time for opening the port, the following may be performed:
the notification message carries a second time index, and the notification message that the first data transmission path is recovered to the first access device through a third data transmission path between the first device and the first access device is sent, so that the first access device can control the port of the first access link to be opened according to the notification message, and the first client device can send the data of the first service to the first access device through the first access link.
In addition, considering that an access link failure may cause the access device to initiate a failure alarm to the control device of the opposite access link, then:
the alarm message carries a fault reason, and the fault reason is used for the first access device to analyze the alarm message and then serve as the reason for closing the port, wherein when the reason for closing the port is the fault reason, the first access device does not notify the control module that the first access link has a fault; and when the reason of the port closing is other than the failure reason, notifying the control module that the first access link fails.
In order to more clearly illustrate the embodiments of the present invention, the following provides preferred embodiments of the present invention.
The present preferred embodiment provides a method for transmitting a network side fault of a packet transport network to a user side, and in particular, a method for transmitting a network side fault of a packet transport network to a user side in a PTN network.
In the field of data transmission, when one end of a user side has a fault, the other end of the user side needs to be made to sense the fault so as to prevent the other end of the user side from continuously sending a service flow to waste bandwidth. For example, as in the scenario of fig. 1, two users CE1 and CE2 on the user side of the PTN network access to communicate through two edge nodes PE1 and PE2 of the PTN network, when a link or node on the CE1 side fails, a technique is needed to allow the CE2 node on the opposite end of the network to sense the failure, and when the failure on the CE1 side disappears, the CE2 senses that the failure disappears.
Mapping of user side failures (Mapping) to network side failures, which are already implemented in OAM, is not described in detail here. The preferred embodiment continues Mapping of user side fault to network side fault which has been realized by OAM, and invents a method for transmitting network side fault to user side.
The method for transmitting the network side fault of the packet transport network to the user side is realized by the pass-through (LST) function of the link state from the service layer to the ethernet port, and the content of the preferred embodiment includes the link pass-through function and the time index requirement of the link state pass-through.
The link punch-through function comprises that a private line service AC fault (UNI side) triggers a local Pseudo Wire (PW) to AC Mapping; a fault of a private line service NNI side triggers PW to AC Mapping; triggering PW to AC Mapping by a private network service AC fault (UNI side); private network service NNI side failure;
a private line service AC fault (UNI side) triggers a home PW to AC Mapping, as shown in fig. 1, where the remote AC fault, the remote AC to PW Mapping sends a client signal failure alarm (CSF) message, the home senses the CSF state of PW and starts the PW to Mapping function to set a home AC port to LST down.
A dedicated line service NNI side failure triggers PW to AC Mapping, as shown in fig. 3, when a NNI side failure, such as a PW failure (not limited to PW failure), activates PW to AC Mapping function to set AC port to LSTdown when PW detects the above failure.
A failure of the private network service AC (UNI side) triggers PW to AC Mapping, as shown in fig. 4, a failure of the private network service U side, a ROOT AC to PW Mapping sends a CSF message, and the LEAF node senses the CSF state of PW and enables the PW to AC Mapping function to set the AC port to LST down.
When the specific network service NNI side fails, as shown in fig. 5, when a plurality of nodes pw on the opposite end detect the failure and enable pw to mapping function, the AC port is set to LST down.
The link penetrates the LST time index, and the LST down/up should satisfy the fast switching requirement for protection switching using the event. Wherein, the optical port needs to meet the 100ms time index, and the electric port meets the second level.
The following sets forth various key technical points:
for convenience of description, the modules in this invention are named as follows:
the routing operating system: router Operating System, ROS;
a forwarding table management module: forwarding Table manager, FTM;
a product management module: product management, PM;
a field programmable gate display module: field Programmable Gata Array, FPGA;
a user side interface: user Network Interface, UNI;
a network side interface: network Interface, NNI;
1. when the network side fails, the fault information is transmitted to the user side, and the user side responds to the fault information
In order to guarantee the LST down time index in a typical scenario (such as the scenario described above), the following steps are performed to transmit the network-side failure to the user side:
the NNI line card FPGA detects pw CSF/LOC/AIS/RDI and immediately informs the master control FPGA;
the main control FPGA carries out Mapping and simultaneously records the LST down state of a UNI port, and the LST down state inhibits the Mapping from AC to PW;
the main control FPGA informs the UNI line card FPGA to implement the AC port LST down, and the process is shown as a blue line in FIG. 5;
the UNI line card FPGA closes the port laser machine to realize LST down of the port;
2. when the network side failure disappears, the failure disappearance information is transmitted to the user side, and the user side responds to the failure disappearance information
If the warning of triggering the LST on the pw side disappears, the LST state needs to be cancelled, and the steps are as follows:
when the NNI line card FPGA detects that the pw CSF/LOC/AIS/RDI alarm disappears, the NNI line card FPGA immediately informs the master control FPGA;
the main control FPGA records the LST up state and informs the UNI line card FPGA to implement the AC port LST up;
the master control FPGA state delays from LST down to LST up for 6s without inserting CSF, and judges whether CSF needs to be inserted after 6s, and the process is shown as a blue line in FIG. 6;
3. deadlock scenario solution
As shown in fig. 8, if PE node a and PE node B both enable Mapping, LST and CSF functions, an AC failure at one end of the graph may occur, resulting in a deadlock condition at both ends. The deadlock process is caused as follows:
① AC port link down caused by fiber break of network element A;
② AC link down of network element A triggers AC to pw Mapping;
③ pw CSF is sent from network element A to network element B;
④ pw CSF of NE B triggers pw to AC Mapping;
⑤ the AC port of the network element B starts LST, and links the AC port down according to Mapping result;
⑥ AC link down of network element B triggers AC to pw Mapping;
⑦ pw CSF is sent from network element B to network element A;
⑧ pw CSF of NE A triggers pw to AC Mapping;
⑨ the source of the AC port link down of network element A becomes the link down caused by fiber breakage and LST down.
In order to avoid the above process, the AC port needs to be in an LST down state to inhibit AC to PW Mapping, that is, it is ensured that ⑥⑦⑧ process does not occur in the upper diagram.
Fig. 9 is a block diagram of a control apparatus according to an embodiment of the present invention, and referring to fig. 9, the embodiment of the present invention provides a control apparatus, where the control module is configured to control a first access link, where the first access link is used to carry data transmission between a first client device and a first access device for a first service, where the first service is a service between the first client device and the first access device, and the control apparatus includes:
a first determining module 901, configured to determine whether a first data transmission path between the first device and the first access device for the first service fails;
a first sending module 902, configured to, when a first data transmission path between the first access device and the first device for the first service fails, send an alarm message that the first data transmission path fails to the first access device through a second data transmission path between the first device and the first access device, so that the first access device can control a port of the first access link to be closed according to the alarm message, and the first client device cannot send the data of the first service to the first access device through the first access link.
The control device is used for a control module.
Therefore, through the above manner, even if the first client device sends the first service data, the first client device cannot send the data of the first service to the first access device through the first access link between the first client device and the first access device when the first client device cannot reach the first device due to the failure of the first data transmission path between the first access device and the first device, thereby saving unnecessary consumption of data transmission resources of the first service.
Among them, there may be:
the alarm message carries a first time indicator, and in the first sending module 902, after the first access device parses the first time indicator from the alarm message, the time to control the port to close meets the requirement of the first time indicator.
In addition, the method can also comprise the following steps:
a second determining module, configured to determine whether the first data transmission path is recovered to normal after sending an alarm message that the first data transmission path has a fault to the first access device through a second data transmission path between the first device and the first access device;
a second sending module, configured to send, when the first data transmission path returns to normal, a notification message that the first data transmission path returns to normal to the first access device through a third data transmission path between the first device and the first access device, so that the first access device can control a port of the first access link to be opened according to the notification message, and the first client device can send the data of the first service to the first access device through the first access link.
The embodiment of the invention also provides a main control board which comprises the control device. The main control board belongs to network side equipment or access equipment of the PTN network.
The foregoing is merely an example of the embodiments of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the embodiments of the present invention, and these modifications and decorations should also be regarded as the protection scope of the embodiments of the present invention.
Claims (9)
1. A control method for a control module, wherein the control module is configured to control a first access link, and the first access link is configured to carry data transmission between a first client device and a first access device for a first service, where the first service is a service between the first client device and a first device, and the control method includes:
judging whether a first data transmission path aiming at the first service between the first equipment and the first access equipment has a fault or not;
when a first data transmission path between the first access device and the first device for the first service fails, sending an alarm message that the first data transmission path fails to the first access device through a second data transmission path between the first device and the first access device, so that the first access device can control a port of the first access link to be closed according to the alarm message, and the first client device cannot send data of the first service to the first access device through the first access link;
the alarm message carries a first time index, and the alarm message indicating that the first data transmission path has a fault is sent to the first access device through a second data transmission path between the first device and the first access device, so that the first access device can control a port of the first access link to be closed according to the alarm message, and the first client device cannot send the data of the first service to the first access device through the first access link.
2. The control method according to claim 1, characterized by further comprising:
after sending a warning message that the first data transmission path has a fault to the first access device through a second data transmission path between the first device and the first access device, determining whether the first data transmission path is recovered to be normal;
when the first data transmission path is recovered to be normal, sending a notification message that the first data transmission path is recovered to be normal to the first access device through a third data transmission path between the first device and the first access device, so that the first access device can control a port of the first access link to be opened according to the notification message, and the first client device can send the data of the first service to the first access device through the first access link.
3. The control method according to claim 2, wherein the notification message carries a second time index, and the notification message that the first data transmission path is recovered to the first access device is sent through a third data transmission path between the first device and the first access device, so that the first access device can control, according to the notification message, opening of a port of the first access link, and in the step of sending, by the first client device, the data of the first service to the first access device through the first access link, after the first access device parses the second time index from the alarm message, time for controlling the opening of the port satisfies a requirement of the second time index.
4. The control method according to claim 1, wherein the first device comprises a network-side device, and the control module belongs to the network-side device.
5. The method according to claim 1, wherein the first device includes a second access device, the control module belongs to the second access device, the first service is a service between the first client device and a second client device, data transmission of the first service between the second client device and the second access device is performed through a second access link, and the determining whether a first data transmission path for the first service between the first device and the first access device fails includes:
and judging whether the second access link fails, and if so, judging that a first data transmission path between the first access equipment and the first equipment for the first service fails.
6. The control method according to claim 5, wherein the alarm message carries a failure cause, and the failure cause is used for the first access device to analyze the alarm message and then use the analyzed result as a cause for closing the port, where the first access device does not notify the control module that the first access link fails when the cause for closing the port is the failure cause; and when the reason of the port closing is other than the failure reason, notifying the control module that the first access link fails.
7. A control apparatus, configured to be used in a control module, where the control module is configured to control a first access link, and the first access link is used to carry data transmission between a first client device and a first access device for a first service, where the first service is a service between the first client device and a first device, and the control apparatus includes:
a first determining module, configured to determine whether a first data transmission path between the first device and the first access device for the first service fails;
a first sending module, configured to send, when a first data transmission path between the first access device and the first device for the first service fails, an alarm message indicating that the first data transmission path fails to be sent to the first access device through a second data transmission path between the first device and the first access device, so that the first access device can control a port of the first access link to be closed according to the alarm message, and the first client device cannot send data of the first service to the first access device through the first access link;
the alarm message carries a first time index, and in the first sending module, after the first access device analyzes the first time index from the alarm message, the time for controlling the port to close meets the requirement of the first time index.
8. The control device according to claim 7, characterized by further comprising:
a second determining module, configured to determine whether the first data transmission path is recovered to normal after sending an alarm message that the first data transmission path has a fault to the first access device through a second data transmission path between the first device and the first access device;
a second sending module, configured to send, when the first data transmission path returns to normal, a notification message that the first data transmission path returns to normal to the first access device through a third data transmission path between the first device and the first access device, so that the first access device can control a port of the first access link to be opened according to the notification message, and the first client device can send the data of the first service to the first access device through the first access link.
9. A main control board comprising the control device of any one of claims 7 to 8.
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| US6894969B1 (en) * | 2000-11-14 | 2005-05-17 | Lucent Technologies Inc. | Apparatus and method for redundancy of processing modules interfaced to a switching core |
| CN102148694A (en) * | 2010-02-04 | 2011-08-10 | 中兴通讯股份有限公司 | Linear 1-to-N protection method, device and system for packet transport network |
| CN102231674A (en) * | 2011-06-17 | 2011-11-02 | 中兴通讯股份有限公司 | Processing method and apparatus of far-end fault of Ethernet |
| CN102916843A (en) * | 2012-11-19 | 2013-02-06 | 烽火通信科技股份有限公司 | Link protection implementation method for bearing point-to-point private line service by PTN (Packet Transport Network) network |
| CN103580931A (en) * | 2013-11-25 | 2014-02-12 | 烽火通信科技股份有限公司 | Link protection method for PTN (Packet Transport Network) carrying point-to-point private line service |
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| CN105703936A (en) | 2016-06-22 |
| WO2016082497A1 (en) | 2016-06-02 |
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