CN102075350B - Synchronous digital hierarchy ring network topology discovery method - Google Patents
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Abstract
The invention discloses a synchronous digital hierarchy (SDH) topology discovery method. The method is characterized by comprising the following steps that: a master station sends predetermined overhead bytes to a slave station in east and west directions; the slave station receives the overhead bytes from the east and west directions and transfers the overhead bytes according to a predetermined rule; the master station sends an address confirmation command to the slave station when determining that the received overhead bytes sent by the slave station are the same in preset time, wherein the command comprises a subnet address field; and the slave station generates an internet protocol (IP) address of the slave station according to the subnet address field and the values of the overhead bytes to be sent by the slave station after receiving the command. The invention also provides a topology discovery method for a chain network. By adopting the technical scheme provided by the invention, the network can be accessed under the condition that an IP address is not required to be allocated to a network element in advance, so that the operation cost is reduced.
Description
Technical field
The present invention relates to communication technical field, in particular, relate to a kind of SDH ring-network topology discover method based on overhead byte.
Background technology
SDH (Synchronous Digital Hierarchy, SDH) is a kind of with the transmission of multiple connection, circuit and function of exchange combines together and transmit network by the integrated information of united net management system operation.Key optical transport network based on SDH is used in field of telecommunications such as telecommunications, UNICOM, broadcasting and TV on a large scale.
The SDH ring-network topology finds in many application scenarios demand is arranged all, such as: power network distribution automation etc.Existing Topology Discovery scheme is utilized the network management path between network element usually, carries out methods such as address resolution or ICMP (Internet Control Message Protocol) detection through ARP (address resolution protocol) and realizes.But these methods all need take more network management path resource; And all need just can add network to network element configuration IP address in advance; Simultaneously, existing these schemes are slow to the variation response of network topology, can not find the real-time change of SDH ring-network topology timely.
Summary of the invention
The present invention provides a kind of SDH ring-network topology discover method; Adopt technical scheme of the present invention; Do not need just can add network to network element configuration IP address in advance, can reduce and open cost, simultaneously; Adopt this scheme can reduce, in time the variation of corresponding network topology to the taking of network management path resource.
Technical scheme provided by the invention is described below:
The invention provides a kind of SDH SDH topology discovery method, comprising:
Main website with east orientation and western to both direction, sends predetermined overhead byte to slave station respectively;
Said slave station receives from east orientation and western said overhead byte to both direction, and according to the pre-defined rule transmission;
When the value of the overhead byte that the said slave station that said main website confirms in the scheduled time to receive sends is identical, send the Address Confirmation order to slave station; Comprise the subnet address field in the said order;
Said from stand in receive said order after, according to the value of the said subnet address field and the overhead byte that self will send, generate its own IP address.
Further, said method also comprises:
Said from stand in generate said IP address after, keep said IP address constant, even the value of the overhead byte that self will send changes;
Said slave station is confirmed its own IP address again after the Address Confirmation order that receives the transmission of said main website once more.
Further, said method also comprises:
Said main website is with east orientation or western to as sending direction the time, and the value of the overhead byte that said main website sends is set to zero; The value of the said overhead byte that the value of the overhead byte that said slave station sends is set to receive adds one; Receive the direction of said overhead byte when unavailable at said slave station, the value of the overhead byte that said slave station sends is set to 128.
Further, said method also comprises:
Said main website to the said east orientation that receives and west to said overhead byte monitor, to confirm that said SDH looped network is closed or to break off;
In said east orientation and west to the value of said overhead byte all less than 128 o'clock, confirm that said SDH looped network is closed; The value of said overhead byte confirms that all more than or equal to 128 o'clock said SDH looped network breaks off.
Further, when said SDH looped network was closed, said method further comprised:
When the value of the overhead byte that receives in said main website was opened for the SDH looped network, the value of the initial overhead byte that receives subtracted for the moment, confirms that NE quantity has reduced one in the said SDH looped network;
The position of the network element that the mode that said main website adopts the said overhead byte of inquiry to change node is confirmed to be reduced.
Further, when said SDH looped network was closed, said method further comprised:
When the value of the overhead byte that receives in said main website was opened for the SDH looped network, the value of the initial overhead byte that receives added for the moment, confirms that NE quantity has increased by one in the said SDH looped network;
The position of the network element that the mode that said main website adopts the said overhead byte of inquiry to change node is confirmed to be increased.
Further, to said SDH Webweb unit quantity situation about increasing also, said method comprises:
Said main website sends the Address Confirmation order to all network elements in the SDH looped network, so that the network element in the said SDH looped network is confirmed its own IP address again; Perhaps,
Said main website sends the Address Confirmation order to newly-increased network element; The value that comprises IP address field and the overhead byte corresponding in the said order with said newly-increased network element; So that when said value from value that stands in definite said overhead byte and the overhead byte that self will send is identical, respond said Address Confirmation order.
Further, when said SDH looped network was closed, said method also comprised:
Said main website confirm east orientation and west to the value of the overhead byte that receives all more than or equal to 128 o'clock, confirm that said SDH looped network breaks off;
The NE quantity of said main website east orientation is that the value of the overhead byte that receives of said main website east orientation adds one and deducts 128;
Said main website west to NE quantity to be said main website west add one to the value of the overhead byte that receives deducts 128.
The present invention also provides a kind of topology discovery method of link network, comprising:
Main website with east orientation and western to both direction, sends predetermined overhead byte to slave station respectively;
Said slave station receives from east orientation and western said overhead byte to both direction, and according to the pre-defined rule transmission;
When the value of the overhead byte that the said slave station that the definite in the given time east orientation of said main website receives sends was identical, the slave station in east orientation sent the Address Confirmation order; Comprise the subnet address field in the said order;
The value of the overhead byte that said slave station will send to east orientation according to said subnet address field and self generates the IP address of this network element.
Further, said method also comprises:
When said main website confirms that in the given time the value of the overhead byte that send to the said slave station that receives in the west is identical, westwards in slave station send the Address Confirmation order, comprise subnet address field and address deviant in the said order; Wherein, said address deviant is that the value of the overhead byte that receives of east orientation adds one and deducts 128;
Said slave station according to said subnet address field, self will be westwards to the value and the said address deviant of the overhead byte that sends, generate the IP address of this network element; Wherein said IP address deducts 128 and adds one for self will be westwards adding the above address deviant to the value of the said overhead byte that sends.
Beneficial effect:
The present invention provides a kind of SDH ring-network topology discover method, and main website with east orientation and western to both direction, sends predetermined overhead byte to slave station respectively; The said overhead byte that said main website sends to the said slave station that receives, when confirming that in the given time said overhead byte is identical, the broadcasting tributary address is confirmed order; Comprise the subnet address field in the said order; Said from stand in receive said order after, according to the overhead byte value that said subnet address field and this network element will send, generate the IP address of this network element.Adopt technical scheme of the present invention, do not need just can add network to network element configuration IP address in advance, solved the restriction of prior art; Can reduce and open cost; Simultaneously, adopt this scheme can reduce, in time the variation of response to network topology to the taking of network management path resource.
Description of drawings
Fig. 1 is the flow chart of a kind of SDH looped network of embodiment of the invention method for discovering network topology;
Fig. 2 is the network topology sketch map of the embodiment of the invention;
Fig. 3 is the network topology sketch map of the embodiment of the invention;
Fig. 4 is the network topology sketch map of the embodiment of the invention;
Fig. 5 is the network topology sketch map of the embodiment of the invention;
Fig. 6 is the network topology sketch map of the embodiment of the invention;
Fig. 7 is the flow chart of a kind of link network topology discovery method of the embodiment of the invention;
Fig. 8 is the network topology sketch map of the embodiment of the invention;
Fig. 9 is the network topology sketch map of the embodiment of the invention.
Embodiment
The embodiment of the invention provides a kind of SDH ring-network topology discover method, and main website with east orientation and western to both direction, sends predetermined overhead byte to slave station respectively; When the value of the overhead byte that the said slave station that said main website confirms to receive in the given time sends is identical, send the Address Confirmation order to slave station; So that said from stand in receive said order after, according to the value of the said subnet address field and the overhead byte that self will send, generate its own IP address.Adopt technical scheme of the present invention, do not need to add network to network element configuration IP address in advance, solved the restriction of prior art, simultaneously, adopt the variation of corresponding network topology in time of this scheme.
In order further the technical scheme of the embodiment of the invention to be understood, describe below in conjunction with accompanying drawing.
As shown in Figure 1, the embodiment of the invention proposes a kind of SDH topology discovery method, and technical scheme comprises:
Step 101: main website with east orientation and western to both direction, sends predetermined overhead byte to slave station respectively;
Step 102: said slave station receives from east orientation and western said overhead byte to both direction, and according to the pre-defined rule transmission;
Step 103: when the value of the overhead byte that the said slave station that said main website confirms to receive in the given time sends is identical, send the Address Confirmation order to slave station; Comprise the subnet address field in the said order;
Step 104: said from stand in receive said order after, according to the value of the said subnet address field and the overhead byte that self will send, generate its own IP address.
To said method specifically, optional network element is as said main website in said SDH looped network, and all the other network elements are as said slave station.The selection mode that does not have main website in the embodiment of the invention limits, and can in the SDH looped network, choose a network element wantonly as the main website in the SDH looped network, and all the other network elements are as slave station.
To said method specifically, said method can further include the delivery rules of overhead byte, specifically comprises:
Said main website is with east orientation or western to as sending direction the time, and the value of the overhead byte that said main website sends is set to zero; The value of the said overhead byte that the value of the overhead byte that said slave station sends is set to receive adds one; Receive the direction of said overhead byte when unavailable at said slave station; For example: have alarm as follows: LOS (light signal is lost), LOF (OOF); MS-AIS (multiplexing end alarm indication); MS-RDI (indication of multiplex section remote bug) or the like, in these cases, the value of the overhead byte that said slave station sends is set to 128.
Need to prove that after the SDH looped network was opened, network element east orientation in the SDH looped network and west were unique to the value of the overhead byte that sends; As shown in Figure 2; A is a main website, and all the other are slave station, when the principal direction of regulation SDH looped network network topology is clockwise direction; Main website is among the figure A to the direction of B with east orientation as sending direction, the direction that all the other slave stations transmit overhead bytes be B to C to D to E to F to A; A is to the direction of F among the figure to being as sending direction with the west in main website, and the direction that all the other slave stations transmit overhead byte is that F arrives B to A to E to D to C.
Like the delivery rules according to above-mentioned overhead byte, with east orientation during as sending direction, the east orientation of the A of main website is A-B at the A of main website, and promptly to send the value (OH) of overhead byte be 0 to east orientation; The east orientation of slave station B is B-C, i.e. east orientation transmission OH is 1; The east orientation of slave station C is C-D, i.e. east orientation transmission OH is 2; The east orientation of slave station D is D-E, i.e. east orientation transmission OH is 3; The east orientation of slave station E is E-F, i.e. east orientation transmission OH is 4, and the east orientation of slave station F is F-A, i.e. east orientation transmission OH is 5.When to the west of the main website to as sending direction the time, identical with the transfer mode of east orientation, just in the opposite direction.
Need to prove that the sum that adopts network element on the above-mentioned pre-defined rule requirement SDH looped network is less than 128, but the technical scheme that the present invention proposes and be not precluded within and use two overhead bytes to satisfy the NE No. quantitative limitation on the SDH looped network.
In the embodiment of the invention, for the selection mode of predetermined overhead byte, the overhead byte that requires to have specific or specific function is not optional, for example: A1, B1, K1, K2 etc.
In addition; Main website to the west to and the overhead byte that receives of east orientation monitor; If the value of the overhead byte that receives continues under the identical situation of a period of time (scheduled time); Continuously n the slave station in the SDH looped network sends the Address Confirmation order, can adopt the mode of broadcasting to come to send to slave station the mode of Address Confirmation order in the embodiment of the invention, sends n time purpose continuously and is to guarantee that the network element in all SDH looped networks can receive this affirmation order.
From stand in receive Address Confirmation order after, from this order, extract the subnet address, simultaneously with the OH value of the east orientation transmission of this network element as network element address, thereby constitute the complete network element IP address of this network element.As shown in Figure 3; Suppose that the subnet address is 192.192.4.0, subnet mask is 255.255.255.0, and the IP address of slave station B is 192.192.4.1; The IP address of slave station C is 192.192.4.2; The IP address of slave station D is 192.192.4.3, and the IP address of slave station E is 192.192.4.4, and the IP address of slave station F is 192.192.4.5.
In the embodiment of the invention, after the network element in the SDH looped network was accomplished the IP Address Confirmation, main website can obtain the MAC Address of each network element through reverse address resolution.
To said method specifically, said method can also comprise:
Said behind the IP address that stands in this network element of generation, keep said IP address constant, even the value of the overhead byte that this network element will send changes;
Said slave station is confirmed its own IP address again when receiving the Address Confirmation order of said main website transmission once more.
The said method of the embodiment of the invention can further include:
Said main website to the said east orientation that receives and west to said overhead byte monitor, to confirm that said SDH looped network is closed or to break off;
In said east orientation and west to the value of said overhead byte all less than 128 o'clock, confirm that said SDH looped network is closed; More than or equal to 128 o'clock, confirm that said SDH looped network breaks off in the value of said overhead byte.
Further, when said SDH looped network was closed, said method further comprised:
When the value of the overhead byte that receives in said main website was opened for the SDH looped network, the value of the initial overhead byte that receives subtracted for the moment, confirms that NE quantity has reduced one in the said SDH looped network;
The position of the network element that the mode that said main website adopts the said overhead byte of inquiry to change node is confirmed to be reduced.
Specifically, as shown in Figure 4, the A of main website can find to have reduced in the SDH looped network network element confirming that the west subtracts for the moment for initial OH value to the OH value that receives, and the D of network element shown in Fig. 4 is deleted;
Judge by the position of deletion network element and can adopt several different methods; Propose in the embodiment of the invention and can judge that for example among Fig. 4, C point OH value does not change by the position of deletion network element through the boundary node that inquiry OH value changes; And the E point reduces one, can judge that in view of the above by the deletion network element be D.
Further, when said SDH looped network was closed, said method further comprised:
When the value of the overhead byte that receives in said main website was opened for the SDH looped network, the value of the initial overhead byte that receives added for the moment, confirms that NE quantity has increased by one in the said SDH looped network;
The position of the network element that the mode that said main website adopts the said overhead byte of inquiry to change node is confirmed to be increased.
Further, to said SDH Webweb unit quantity situation about increasing also, said method can comprise:
Webmaster is directed against all network elements in the SDH looped network through main website or by main website, sends the Address Confirmation order, so that the network element in the said SDH looped network is confirmed its own IP address again; Perhaps,
Webmaster sends the Address Confirmation order through main website or by main website to newly-increased network element; The value that comprises IP address field and the overhead byte corresponding in the said order with said newly-increased network element; So that when said value from value that stands in definite said overhead byte and the overhead byte that self will send is identical, respond said Address Confirmation order.
Specifically, as shown in Figure 5, suppose that increasing network element is DD, the IP address of each network element and OH value are as shown in the figure in the SDH looped network so, and this moment, network element DD did not receive the Address Confirmation order as yet, can not respond any order except that Address Confirmation.
Can judge the position of newly-increased network element through the boundary node that inquiry OH value changes, for example, D point OH value does not change, and the E point increases by one, and the position that can judge newly-increased network element is between D point and E point.
Further, when said SDH looped network was closed, said method can also comprise:
Said main website confirm east orientation and west to the value of the overhead byte that receives all more than or equal to 128 o'clock, confirm that said SDH looped network breaks off;
The value of the overhead byte (OH) that the NE quantity (N) of said main website east orientation receives for said main website east orientation adds one and deducts 128; Be expressed as N=OH+1-128 with expression formula;
Said main website west to NE quantity (N) deduct 128 for said main website west adds one to the value of the overhead byte that receives (OH); Be expressed as N=OH+1-128 with expression formula;
Specifically, as shown in Figure 6, the SDH looped network is separated at D point and E point, and wherein, the OH value has adopted 16 systems to represent among the figure.
The NE quantity N=OH+1-128=130+1-128=3 of main website east orientation;
The main website west to NE quantity N=OH+1-128=129+1-128=2;
Utilize Dongguang direction NE quantity and western light direction can obtain the looped network breakaway poing, the main website east orientation has 3 network elements among Fig. 6, and therefore the west can judge that the looped network breakaway poing is between D and E to 2 network elements are arranged.
As shown in Figure 7, based on above-mentioned method embodiment shown in Figure 1, the present invention also provides a kind of topology discovery method of link network, comprising:
Step 701: main website with east orientation and western to both direction, sends predetermined overhead byte to slave station respectively;
Step 702: said slave station receives from east orientation and western said overhead byte to both direction, and according to the pre-defined rule transmission;
Step 703: when said main website confirms that in the given time the value of the overhead byte that east orientation receives is identical, send the Address Confirmation order to east orientation; Comprise the subnet address field in the said order;
Step 704: the value of the overhead byte that said slave station will send to east orientation according to said subnet address field and self generates its own IP address.
Specifically, shown in Figure 8, present embodiment propose with the link network of six nodes as application scenarios, A be main website all the other be slave station.
To such scheme specifically, said method can also comprise:
When said main website confirms that in the given time western value to the overhead byte that receives is identical, to sending the Address Confirmation order, comprise subnet address field and address deviant in the said order westwards; Wherein, said address deviant is that the value (OH_EAST) of the overhead byte that receives of east orientation adds one and deducts 128;
Said slave station is wanted value and the said address deviant of west to the overhead byte that sends according to said subnet address field, this network element, generates the IP address of this network element; To be the Home Network west add the above address deviant (OFFSET) to the value (OH) of the said overhead byte that sends in wherein said IP address deducts 128 and adds one.
Specifically, when the OH value that main website observation east orientation is received, after stablizing in the given time; Continuously send Address Confirmation order to east orientation n time; Require each tributary address to confirm, wherein, receive that the slave station of Address Confirmation order extracts the subnet address in the said order; And the value of the overhead byte that this network element east orientation is sent obtains self complete IP address as network element address.
Specifically, after the main website observation western to the OH value of receiving, is stable in the given time, westwards order to the transmission Address Confirmation for n time continuously, Address Confirmation comprises subnet address field and address deviant in ordering.Wherein, the address offset value-based algorithm is: OFFSET=OH_EAST+1-128, and as shown in Figure 8, OFFSET=130+1-128=3 in the present embodiment;
Slave station extracts the subnet address after receiving the Address Confirmation order from order, be the calculation of parameter network element address with the address offset value field of this network element west in sending OH value and order simultaneously, thereby constitute complete network element IP, and algorithm is:
IP=OH+OFFSET-128+1, as shown in Figure 9, the IP of slave station E is 128+3-128+1=4, promptly the IP address of slave station E is 192.192.4.4; The IP of slave station F is 129+3-128+1=5, and promptly the IP address of slave station F is 192.192.4.5.
Need to prove that above-mentioned method embodiment shown in Figure 1 obtains because present embodiment is based on, and comprised identical with method embodiment shown in Figure 1 or the corresponding techniques characteristic, the technical scheme of repeatability do not made one by one at this and giving unnecessary details.
To sum up, the present invention further specifies a kind of SDH looped network method for discovering network topology provided by the invention through the foregoing description and accompanying drawing.Adopt technical scheme of the present invention, do not need just can add network to network element configuration IP address in advance, solved the restriction of prior art; Can reduce and open cost; Simultaneously, adopt this scheme can reduce, in time the variation of corresponding network topology to the taking of network management path resource.
The above; Be merely the preferable embodiment of the present invention, but protection scope of the present invention is not limited thereto, any technical staff who is familiar with the present technique field is in the technical scope that the present invention discloses; The variation that can expect easily or replacement all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection range of claims.
Claims (9)
1. a SDH SDH topology discovery method is characterized in that, comprising:
Main website with east orientation and western to both direction, sends predetermined overhead byte to slave station respectively;
Said slave station receives from east orientation and western said overhead byte to both direction, and according to the pre-defined rule transmission; Said pre-defined rule comprises said main website with east orientation or western to as sending direction the time, and the value of the overhead byte that said main website sends is set to zero; The value of the said overhead byte that the value of the overhead byte that said slave station sends is set to receive adds one; Receive the direction of said overhead byte when unavailable at said slave station, the value of the overhead byte that said slave station sends is set to 128;
When the value of the overhead byte that the said slave station that said main website confirms to receive in the given time sends is identical, send the Address Confirmation order to slave station; Comprise the subnet address field in the said order;
Said from stand in receive said order after, according to the value of the said subnet address field and the overhead byte that self will send, generate its own IP address.
2. method according to claim 1 is characterized in that, said method also comprises:
Said from stand in generate said IP address after, keep said IP address constant, even the value of the overhead byte that self will send changes;
Said slave station is confirmed its own IP address again after the Address Confirmation order that receives the transmission of said main website once more.
3. method according to claim 1 is characterized in that, said method also comprises:
Said main website to the said east orientation that receives and west to said overhead byte monitor, to confirm that the SDH looped network is closed or to break off;
In said east orientation and west to the value of said overhead byte all less than 128 o'clock, confirm that said SDH looped network is closed; The value of said overhead byte confirms that all more than or equal to 128 o'clock said SDH looped network breaks off.
4. method according to claim 3 is characterized in that, when said SDH looped network was closed, said method further comprised:
The value of the overhead byte that receives in said main website is that SDH looped network value closed and the initial overhead byte that receives subtracts for the moment, confirms that NE quantity has reduced one in the said SDH looped network;
The position of the network element that the mode that said main website adopts the said overhead byte of inquiry to change node is confirmed to be reduced.
5. method according to claim 3 is characterized in that, when said SDH looped network was closed, said method further comprised:
The value of the overhead byte that receives in said main website is that SDH looped network value closed and the initial overhead byte that receives adds for the moment, confirms that NE quantity has increased by one in the said SDH looped network;
The position of the network element that the mode that said main website adopts the said overhead byte of inquiry to change node is confirmed to be increased.
6. method according to claim 3 is characterized in that, to the situation that NE quantity in the said SDH looped network increases, said method comprises:
Said main website sends the Address Confirmation order to all network elements in the SDH looped network, so that the network element in the said SDH looped network is confirmed its own IP address again; Perhaps,
Said main website sends the Address Confirmation order to newly-increased network element; The value that comprises IP address field and the overhead byte corresponding in the said order with said newly-increased network element; So that when said value from value that stands in definite said overhead byte and the overhead byte that self will send is identical, respond said Address Confirmation order.
7. method according to claim 3 is characterized in that, when said SDH looped network was closed, said method also comprised:
Said main website confirm east orientation and west to the value of the overhead byte that receives all more than or equal to 128 o'clock, confirm that said SDH looped network breaks off;
The NE quantity of said main website east orientation is that the value of the overhead byte that receives of said main website east orientation adds one and deducts 128;
Said main website west to NE quantity to be said main website west add one to the value of the overhead byte that receives deducts 128.
8. the topology discovery method of a link network is characterized in that, comprising:
Main website with east orientation and western to both direction, sends predetermined overhead byte to slave station respectively;
Said slave station receives from east orientation and western said overhead byte to both direction, and according to the pre-defined rule transmission; Said pre-defined rule comprises said main website with east orientation or western to as sending direction the time, and the value of the overhead byte that said main website sends is set to zero; The value of the said overhead byte that the value of the overhead byte that said slave station sends is set to receive adds one; Receive the direction of said overhead byte when unavailable at said slave station, the value of the overhead byte that said slave station sends is set to 128;
When the value of the overhead byte that the said slave station that the definite in the given time east orientation of said main website receives sends was identical, the slave station in east orientation sent the Address Confirmation order; Comprise the subnet address field in the said order;
The value of the overhead byte that said slave station will send to east orientation according to said subnet address field and self generates the IP address of this network element.
9. method according to claim 8 is characterized in that, said method also comprises:
When said main website confirms that in the given time the value of the overhead byte that send to the said slave station that receives in the west is identical, westwards in slave station send the Address Confirmation order, comprise subnet address field and address deviant in the said order; Wherein, said address deviant is that the value of the overhead byte that receives of east orientation adds one and deducts 128;
Said slave station according to said subnet address field, self will be westwards to the value and the said address deviant of the overhead byte that sends, generate the IP address of this network element; Wherein said IP address deducts 128 and adds one for self will be westwards adding the above address deviant to the value of the said overhead byte that sends.
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| CN1539234A (en) * | 2001-02-13 | 2004-10-20 | Method and device for determining internet protocol addresses of terminal device | |
| US7099287B1 (en) * | 2001-03-06 | 2006-08-29 | Cisco Systems O.I.A. (1988) Ltd. | Node detection and ring configuration for physical star connected networks |
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| CN102075350A (en) | 2011-05-25 |
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