CN100414878C - Mehod for implementing network interconnection management based on asynchronous transmission mode - Google Patents
Mehod for implementing network interconnection management based on asynchronous transmission mode Download PDFInfo
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- CN100414878C CN100414878C CNB021317844A CN02131784A CN100414878C CN 100414878 C CN100414878 C CN 100414878C CN B021317844 A CNB021317844 A CN B021317844A CN 02131784 A CN02131784 A CN 02131784A CN 100414878 C CN100414878 C CN 100414878C
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Abstract
The present invention relates to a method for implementing network interconnection management based on an asynchronous transmission mode (ATM). The method comprises that firstly, an interconnecting path among ATM network devices is established; then, the ATM network devices carry out the setup of a network topological diagram through the finding process of an adjoining network device; simultaneously, the established network topological diagram based on an ATM network is maintained and updated; finally, network interconnection management based on the ATM is carried out according to the established network topological diagram. The present invention provides great convenience to ATM network management for users, and the cost for ATM network management and maintenance is saved greatly. In addition, the present invention realizes automatic management of network topology, network connection fault can recover automatically, and thus, the reliability of ATM network interconnection is enhanced, and the safety of network management and maintenance is ensured.
Description
Technical field
The present invention relates to communication technical field, relate in particular to a kind of network interconnection management implementation method based on asynchronous transfer mode.
Background technology
Growing along with the network communications technology, the bulky complex day by day of network interconnection relation is managed the increasing network equipment effectively, becomes the technical problem that network equipment provider and Virtual network operator need to be resolved hurrily.At present, Internet (the Internet) mainly carries out network interconnection by IP (Internet protocol), can visit any one main frame or equipment in the IP network by TCP/IP (transmission control protocol/Internet protocol), and it is managed accordingly.But, only support main frame or the equipment of ATM (asynchronous transfer mode) among the Internet some, then can't carry out network interconnection by IP, promptly can't manage these network equipments by network.
Therefore, in order to realize network interconnection, to arrive to any one supports the purpose that the network equipment of ATM manages in the network based on ATM; Particularly, as inlet, manage other atm network equipment by a network equipment in the private network inside of a Virtual network operator; At present mainly be by setting up the passage that the PVC ways of connecting is set up the atm network equipment room by hand, realizing management to other atm network equipment; But this method is cumbersome for the user, must be configured all atm network equipment in advance, if the apart distance of these equipment is remoter, disposes one by one, and cost is too high, can't realize sometimes even at all.
In sum, existing ATM network device management scheme has that the equipment of layoutprocedure complexity, configuration is more, maintenance cost is high and shortcoming such as network management difficulty.
Summary of the invention
The purpose of this invention is to provide a kind of network interconnection management implementation method, can set up interference networks automatically, so that to supporting the management of the network equipment of ATM in the network based on ATM based on ATM.
The object of the present invention is achieved like this: the network interconnection management implementation method based on asynchronous transfer mode comprises:
A, the relaying virtual path identifier by the atm network equipment interface is set, the default value of Virtual channe identifiers are set up the interconnecting channel of atm network equipment room;
B, atm network equipment are found adjacent atm device by sending the handshake request message to adjacency atm network equipment, to carry out the foundation of network topological diagram;
C, the network equipment carry out maintenance update by sending connection status upgrading message to being adjacent the atm network equipment that connects to the network topological diagram of setting up based on atm network;
The network topological diagram that d, basis have been set up carries out the network interconnection management based on ATM, and it specifically comprises the steps:
D1, determine the channel of LA Management Room communication link and employing according to the network topological diagram in the network equipment;
The channel that d2, utilization are determined transmits message at LA Management Room, realizes the network interconnection management based on ATM.
Described step b comprises:
B1, atm network equipment outwards send the handshake request message;
B2, the handshake message that receives in abutting connection with the atm network device responds that links to each other with this atm network equipment;
B3, atm network equipment judge whether be present in the network topological diagram in abutting connection with atm network equipment according to the response message content, if exist, and execution in step b4 then, otherwise, execution in step b5;
B4, do not do any processing;
B5, be to create interface, and preserve, simultaneously the network topological diagram of preserving is sent in abutting connection with atm network equipment in abutting connection with atm network equipment.
Described handshake request content of message comprises: the device number that sends message end atm network equipment.
The content of the response message of described handshake request message comprises: response message transmitting terminal atm network equipment is the chain line of this link assignment.
Described step b5 comprises:
B51, judge in abutting connection with atm network equipment whether be higher level's network equipment, if, execution in step b52 then, otherwise, execution in step b53;
B52, be to create interface, distribute links sign in abutting connection with atm network equipment, and be stored in the network topological diagram, simultaneously the network topological diagram of preserving is sent in abutting connection with atm network equipment, upgrade the network topological diagram of oneself in abutting connection with atm network equipment according to the network topological diagram of receiving;
B53, be to create interface, and be stored in the network topological diagram, simultaneously the network topological diagram of preserving is sent in abutting connection with atm network equipment, upgrade the network topological diagram of oneself in abutting connection with atm network equipment according to the network topological diagram of receiving in abutting connection with atm network equipment.
Described step c comprises:
C1, the network equipment outwards send connection status upgrading message, the network topological diagram of its preservation are notified all of its neighbor network equipment of adjacency;
C2, the connection status upgrading message of receiving in abutting connection with network equipment basis carry out the renewal of the network topological diagram of oneself.
Described step c1 comprises:
The atm network equipment of c11, transmission connection status message repeatedly sends connection status upgrading message to the adjacency network equipment, has write down the network equipment number of process and the network equipment number of adjacency thereof in the message;
C12, the network equipment that receives connection status upgrading message judge whether there is the network equipment number that is adjacent in the message, if exist, then no longer duplicate and send this connection status upgrading message to the network equipment of this adjacency, otherwise, duplicate this connection status upgrading message of transmission to the network equipment of adjacency.
Described step c2 comprises:
C21, the network topological diagram of preserving on the network topological diagram in the connection status the received upgrading message and the network equipment is compared, judge wherein corresponding connection status inconsistent whether be that the adjacent side or the local terminal network equipment of the opposite end network equipment do not have route to the opposite end LA Management Room, if, execution in step c22 then, otherwise, execution in step C23;
C22, be as the criterion with the network topological diagram of the opposite end that receives and upgrade the network topological diagram that the local terminal network equipment is preserved;
C23, do not carry out the renewal of network topological diagram in the local terminal network equipment.
Wherein, described step c22 comprises:
C221, judge the carrying of connection status upgrading message the timestamp value whether greater than the timestamp value of the message of the nearest receipts of preserving in the local terminal network equipment, if, execution in step c222, otherwise, execution in step c23;
C222, be as the criterion with the network topological diagram of the opposite end that receives and upgrade the network topological diagram that the local terminal network equipment is preserved.
The network equipment of the described outside transmission connection status upgrading message of step c1 comprises:
The atm network equipment that the network connection state at place changes specifically comprises:
Two networks based on ATM are merged into a network, former two based on the included network equipment of the network of ATM;
Network based on ATM splits into two sub-networks, former one based on the included network equipment of the network of ATM;
When increasing a limit in the network of ATM, the whole network atm network equipment;
When discharging a limit in the network of ATM, the whole network atm network equipment;
And the atm network equipment that satisfies the time requirement of timed sending connection status upgrading message.
Step c1 also comprises the process of the atm network equipment of determining that network connection state changes, and being divided into is three kinds of situations:
C13, behind new equipment of discovering network topology, notify the user to confirm this equipment;
Device number for confirming will be stored in the network configuration topological diagram all the time, during as if fault, and with report and alarm, communication disruption;
For unacknowledged equipment, after the equipment fault, will in network topological diagram, disappear, just often, do not accept configuration, not as the equipment of link road by process;
C14, after two equipment rooms increase a fillet, notify the user to confirm this fillet;
Limit for confirming will be stored in the network topological diagram all the time, and during as if fault, with report and alarm, interface interrupts;
For unacknowledged limit, after the fault, will in network topological diagram, disappear, the internal memory of creating the interface application also will discharge; Just often, also not as the limit of link road by process;
C15, after interface increases a link, notify the user to confirm this link;
Link for confirming will be stored in the tables of data of interface all the time, during as if fault, will report the police, link down;
For unacknowledged link, after the fault, will in the interface data table, disappear, just often, the also link that does not distribute, the not logical communication channel of bearing interface as interface resource.
Described steps d 1 comprises:
D11, determine the communication link of LA Management Room;
D12, judgement are initiated to select whether the network equipment of definite channel is undernet atm network equipment, if, execution in step d13, otherwise, execution in step d14;
D13, subordinate's atm network equipment send the connection request message to higher level's atm network equipment;
D14, higher level's atm device are determined available communication port chain line, and send to subordinate's atm network equipment;
After d15, subordinate's atm network equipment receive this message, confirmation message is replied to higher level's atm network equipment, thereby determine the channel that the atm network communication between devices adopts.
Described steps d 11 comprises:
D111, according to the link number on the interface, from article one link, order is carried out the connection resource application on each link;
D112, selection are determined the link that bandwidth meets the demands, and are carried out the application of VPI, VCI for this link;
D113, will be recorded in the tables of data, thereby determine the LA Management Room communication link for VPI, the VCI of this link assignment and the relay slogan of link correspondence.
The message that transmits among described steps d 13, d14, the d15 has limit priority in transmission course.
Be provided with one in the message that is transmitted in the steps d 2 and be used for whether effectively encrypted domain of verification msg.
Be provided with encrypted domain in the message that is transmitted in the described steps d 2, be used to deposit whether effectively password of verification msg.
The route that described network topological diagram provides comprises:
Offer the route of devices communicating/application program;
And offer the route of connection management, this route further comprises:
Only specify the general route of terminal point network equipment number: specify end device number, and use the route that the DIJSTRA algorithm obtains;
Active and standby route on VP (virtual path) ring: comprise active and standby two routes, two routes have been passed through all devices on the VP ring respectively;
Specify the route of intermediate equipment: the route of specifying the intermediate equipment of process;
Static routing: indicate by the starting point route of all devices of process to terminal;
Satisfy the route of communication bandwidth requirements: the limit of not satisfying communication bandwidth requirements before carrying out general route calculating is set to fault, the general route that calculates then.
The route of described appointment intermediate equipment is to obtain by following steps:
E, determine the intermediate equipment of appointment, and calculate by the general route of starting point to intermediate equipment;
F, calculating are by intermediate equipment general route to terminal;
G, judge whether two general routes have repeated plant, if having, then all limits of repeated plant are set to fault, execution in step e, otherwise, obtain to specify the routing procedure of intermediate equipment to finish.
By technique scheme as can be seen, the present invention has adopted the method for setting up the ATM interference networks automatically, do not need manually more to dispose, and for the user provides great convenience to the management of atm network, the cost of having saved the atm network management widely and having safeguarded.And the present invention has realized the automatic management of network topology, and network can recover after connecting fault automatically, thereby the atm network interlinking reliability is strengthened, and has guaranteed the fail safe of network management, maintenance.Simultaneously, the present invention also has and connects back mechanism and passage is selected handover mechanism automatically, further for the user provides convenience to the management of atm network equipment, has improved the reliability of network interconnection and management maintenance.
Description of drawings
Fig. 1 is the interconnected schematic diagram 1 of atm network;
Fig. 2 is the interconnected schematic diagram 2 of atm network;
Fig. 3 is an atm network topological diagram refresh process schematic diagram;
Fig. 4 merges schematic diagram for atm network;
Fig. 5 splits schematic diagram for atm network;
Fig. 6 is the schematic diagram that increases fillet in the atm network;
Fig. 7 is the schematic diagram that discharges fillet in the atm network;
Fig. 8 is an access diagram of determining to satisfy bandwidth;
Fig. 9 is for determining communication port process schematic diagram;
Figure 10 is a communication port handoff procedure schematic diagram;
The atm network structural representation that Figure 11 uses for the present invention;
Figure 12 is concrete implementing procedure figure of the present invention.
Embodiment
Implementation method of managing of the present invention based on the network interconnection of ATM, realized the automatic discovery link of user under the free of data configuring condition, automatically set up interface, realize the switching of host-standby communication passage and the automatic generation of network topology automatically, thereby realize the network interconnection management.
As shown in figure 12, realize the interconnection of atm network equipment, at first need to set up atm network interconnection management passage, referring to step 1.As shown in Figure 1, device A, B at first are established to the intercommunication passage and the link of interface 1,2, and the intercommunication passage is inner the connection, and the relaying VPI (virtual path identifier) of interface 1,2, VCI (Virtual channe identifiers) adopt default value 0,32; Can set up by the PVC between this process device A and equipment B (permanent virtual link) passage.
After having set up the passage of atm network equipment room interconnection, just can carry out the foundation of network topological diagram and the management process of network topological diagram, referring to step 2.Network topology management is to make peace synchronously for one of the network topological diagram that keeps each equipment foundation preservation in the network; Simultaneously, guarantee after atm network increases or discharges the interface of a LA Management Room, can make other equipment in the network can obtain this information fast and accurately, promptly guarantee the accurate in real time of network topological diagram.
The foundation of described network topological diagram is that the discovery procedure by adjacent device realizes.The discovery procedure of adjacent device as shown in Figure 2, device A adopts a kind of Hello (shaking hands) message to find adjacent device B, C, D:
Device A sends the Hello request message from 1,2,3 three different interface, in the Hello request message, comprises and only comprise the device number of local terminal; After equipment B, C, D receive this Hello request message, judge whether opposite equip. exists in network topological diagram, if do not exist, create an interface, this link is stored on this interface, if be higher level equipment, also be required to be this link assignment chain line, be indicated to next equipment by the Hello response message, wherein: the equipment that device number is little is higher level equipment, and the equipment that device number is big is subordinate equipment; And to device A transmission Hello response message, in the Hello of higher level equipment response message, comprising by higher level equipment is the chain line of this link assignment; Device A is analyzed the adjacent map of the adjacent device situation that can obtain device A to the Hello response message of receiving.For the Hello request message, each equipment must respond, if there is not response, then retransmits the Hello request message ten times.
After the adjacent map of each network equipment is established, atm network equipment just can obtain the adjacent map of opposite equip. by connection status request message (Link State Request) and connection status response message (Link State Ack) exchange, as shown in Figure 3, thus for setting up the network topological diagram of whole atm network in each atm network equipment.
Equally, for obtaining, also realize by connection status request message (Link State Request) and connection status response message (Link State Ack) with the exchange of the network topological diagram of newly-increased adjacent device.The network equipment sends the connection status request message (Link State Request) walk out if there is not response, then constantly retransmit, per second once, until receiving the connection status response message; The limit connection status that limit state annexation and local terminal are preserved in the connection status response message (Link State Ack) is inconsistent, then carries out determining of network topological diagram by following principle:
(1), if the inconsistent limit of connection status is the adjacent side of opposite equip., the connection status of preserving with opposite equip. is as the criterion;
(2), if local terminal equipment does not have route to two equipment on this limit, then the connection status with the opposite equip. preservation is as the criterion;
(3), for the inconsistent situation of other connection status, then the connection status of preserving with this equipment is as the criterion.
Behind the switching network topology figure, each equipment refreshes the network topology graph structure of oneself.
The variation of atm network connection status happens occasionally, and connection status changes and generally includes following four kinds of situations:
First kind of situation: when two networks are merged into a network, need all of its neighbor equipment of two equipment on the limit of increase that the annexation of newly added equipment number, newly-increased device number, newly-increased equipment room, newly added equipment and the annexation of equipment originally are diffused into.As shown in Figure 4, the network that the network that device A, B are formed and equipment C, D form is by equipment B, the C merging that links to each other, and then the equipment B need be diffused into device A with the annexation of equipment C and equipment D; Equipment C needs the annexation of device A and equipment B is diffused into equipment D.
Second kind of situation a: when network splits into two sub-networks, then need to spread the limit of release.As shown in Figure 5, equipment B need will connect the message informing device A that discharges between equipment B, the equipment C; The message informing equipment D that equipment C need discharge the annexation of equipment C and equipment B.
The third situation: when increasing a limit in the network, then need to spread the device number of two equipment on the limit of increase.As shown in Figure 6, increased the fillet between device A, C, then device A and equipment C need will to increase respectively the message that is connected between device A and equipment C and diffuse to the whole network.
The 4th kind of situation: when discharging a limit in the network, then need to spread the device number of two equipment on the limit of release, as shown in Figure 7, the connection between release device A, C then needs this message informing whole network equipment.
In order to guarantee the real-time accuracy of network topological diagram, the network equipment that the connection status variation takes place need be notified the all-network equipment of adjacency, and the network equipment that the connection status variation promptly takes place need send connection status upgrading message (Link State Update) to the adjacency network equipment.Described connection status upgrading message (Link State Update) is only to the diffusion of the adjacency network equipment, and this message has copy function, after an equipment is received connection status upgrading message, with copy packet, and spreads to all of its neighbor equipment; Simultaneously, in order to prevent that spreading this message causes the message storm, record the device number of this message process and adjacent device thereof number in the message,, then no longer send connection status upgrading message to this equipment if the device number that writes down in the message is arranged in the adjacent device of an equipment.Because connection status upgrading message need not respond, therefore, this message sends 5 times continuously, per second once, the reliable transmission that refreshes with Guarantee Status.
The network equipment is received connection status upgrading message (Link State Update), connection status is upgraded the network topological diagram preserved on network topological diagram in the message and this equipment relatively, if inconsistent place is arranged, adopt following principle to determine the network topology graph structure:
(1), if the inconsistent limit of connection status is the adjacent side of opposite equip., the connection status of preserving with opposite equip. is as the criterion;
(2), if local terminal equipment does not have route to two equipment on this limit, then the connection status with the opposite equip. preservation is as the criterion;
(3), for the inconsistent situation of other connection status, then the connection status of preserving with this equipment is as the criterion.
In order to prevent the situation that old network topological diagram covers new network topological diagram, we have introduced the time-domain of update in connection status upgrading message, initial value is 0, message of every transmission, add 1, after 65535, again since 0, satisfy condition: OldMsgTimer＜NewMsgTimer or (OldMsgTimer-NewMsgTimer) message of FFF0 is for upgrading message, wherein: " OldMsgTimer " is the timestamp of the local message of preserving of receiving recently, and " NewMsgTimer " is the timestamp of new message.For non-renewal message, then it is abandoned.
And, in order to prevent in the atm network running, the routing state that each network equipment is preserved is inconsistent, atm network equipment can regularly carry out the transmission of connection status upgrading message, for example, can determine to send once this message, the limit connection status (only comprising the limit connection status with adjacent device) of present networks equipment is diffused into other equipment every 5-15 minute.
The network topological diagram of atm network just can provide corresponding route for various application after generating; Specifically comprise:
Offer the route of devices communicating/application program: owing to carry out network interconnection when management, can application program only be concerned about and message be sent to terminal point from starting point, and the route of message process is not had too big requirement.Undoubtedly, the number of devices of process is few more, and the possibility that message sends failure is also just more little.So " shortest path by " of equipment room route is based on number of devices minimumly determines.
Offer the route of connection management: because the diversity of the connection that connection management is supported, so route has been proposed multiple demand, the supported route of network topological diagram of the present invention has following several:
1) general route
When the user connects, route is not had special requirement, only need to specify end device number.Then can use the DIJSTRA algorithm, the route that obtains connecting directly according to the limit connection status in the network topological diagram.
The DIJSTRA algorithm is a shortest path first, and the thought of this algorithm is the symmetrical matrix of a N * N rank (N equipment), is designated as D[N, N], if i has the limit to be connected with j, element d[i, j] write down weights from i to the j this edge, if boundless connection then is FFFF.Below can be according to the shortest path of certain equipment P of this matrix computations to every other equipment.Path[i] (i=0 is that a length is 48 array N-1), and the route of minute book device-to-device i if i is a neighbouring device, is then remembered Path[0] [i-1]=P.
(1) be divided into two set, have only P in the set A, have 1 in the set B ..., P-1, P+1 ..., N-1 equipment;
(2) from set B, look for an equipment k, make d[P, k]=min{d[P, j], j=0,1 ..., N-1};
(3) equipment K is added in the set A;
(4) recomputate the weights on each limit, d[P, j]=min{d[P, k]+d[k, j], d[P, j];
(5) as if d[P, j] change, then equipment K is joined Path[j];
(6) if the set B non-NULL changes (2).Otherwise, finish equipment P and calculate to the route of other all devices.
When calculating two equipment room routes, the direct route of adjacent two equipment is sure in actual applications for the shortest, so, in order to prevent the unreasonable of weight setting, cause that two adjacent equipment routes walk non-direct route, need change the route of adjacent two equipment into direct route at last.
2) the active and standby route on the VP ring
When the user disposes on VPRING and connects, need active and standby two routes, these two routes and have been passed through all devices on the VP ring respectively on the different directions of VPRING.Can obtain route like this: behind configuration VP ring, zequin is to the route of terminal point on this ring, obtain primary route after, a limit on the primary route is changed to fault, again zequin is to the route of terminal point on this ring, and this route is route stand-by.Before calculating route, it is correct to need to check whether the VP ring disposes, if incorrect, returns VP ring fault.For the route on the VP ring, the N that relates in the DIJSTRA algorithm goes up number of devices, D[N, N for ring] for ring top connection status figure, if two equipment are adjacent, d[i] [j] be 1, if non-conterminous, d[i] [j] be FFFF.
3) route of appointment intermediate equipment
The user specifies an intermediate equipment, and connection must be passed through this intermediate equipment, is similar to the method for specified portions source routing.Route computing method is:
The route from the starting point to the intermediate equipment is calculated by A, elder generation, with general route calculation method;
B, calculate route again, with general route calculation method from middle equipment to terminal point;
C, obtain these two routes after, judge whether these two routes have repeated plant, if having, then all limits with repeated plant are changed to fault, re-execute steps A; Otherwise, return success; This route is generally used in by artificial limited adjustment, obtains " optimum " route.
4) static routing
Dispose a route by the user, indicate from all devices of origin-to-destination process.Connection management is specified the index of static routing, directly obtains route.
5) satisfy the route of certain bandwidth
When system bandwidth is not enough, if also adopt general route calculation method, then may occur connecting and can not set up, but there is the bandwidth of not utilizing in system, as shown in Figure 8:
The limit weights of supposing three equipment rooms all are 1, no bandwidth in the middle of equipment B and the equipment C has bandwidth between device A and equipment B, the C, if still use general route, then apply for connecting and to set up after the route, and have bandwidth waste between device A and equipment B, the equipment C.So, in this case, adopt the route-type that satisfies certain bandwidth.The route computing method of this type is: routing management calculates according to discharge pattern and connects required bandwidth, and all limits of not satisfying bandwidth condition are changed to fault, calculates through the minimum route of number of devices again.For the route that satisfies bandwidth condition, the N that relates in the DIJSTRA algorithm is all number of devices, D[N, N] be limit connection status figure, if the adjacent and bandwidth of two equipment satisfies bandwidth condition, d[i] [j] be 1, if non-conterminous or bandwidth does not satisfy condition d[i] [j] be FFFF.
For the calculating of signalling route, N is a number of devices all in the atm network, D[N, N] be network topological diagram, if two equipment are adjacent, d[i] [j] be 1, if non-conterminous, d[i] [j] be FFFF.
Because atm network is dynamically found the uncertainty of adjacent device, attract many factors of instability, for example, some misoperations of user may cause the whole system network topology change, thereby influencing route calculates, impacted to connect and normally set up and the transmission of equipment room message, thereby, for fear of these problems, the present invention has introduced affirmation mechanism on the basis of dynamically finding adjacent device, specifically comprise the affirmation mechanism to following three kinds of situations:
(1) confirms an equipment
After atm network is found a new network equipment, will send information to the user, make the user confirm this network equipment, for the network equipment through confirming, its device number will be stored in the network topological diagram all the time, during as if fault, with report and alarm, communication disruption.For not through the network equipment of affirmation, after the equipment fault, will in network topological diagram, disappear, just often, also just show, can not be configured it, not as the network equipment of link road by process, but might be as the network equipment of signalling route process.
(2) confirm that a limit connects
After two equipment rooms increase a limit, equally also will send information to the user, make the user confirm the limit that increases newly, the limit that increases newly for through confirming will be stored in the network topological diagram all the time, and during as if fault, with report and alarm, interface interrupts.For unacknowledged limit, after the fault, will in network topological diagram, disappear, the internal memory of creating the interface application also will discharge.Just often, also just show, not as the limit of link road by process, but might be as the limit of signalling route process.It should be noted that when confirming that a limit connects that the limit connects two corresponding equipment need be confirmed, confirms a limit, is actually two interfaces confirming on two equipment.
(3) confirm a link
After interface of atm network increases a link, will send information to the backstage, the user can transmitting order to lower levels to main frame, confirm this link, the link for confirming will be stored in the tables of data of interface all the time, if during fault, with report and alarm, link down.For unacknowledged link, after the fault, will in the interface data table, disappear, just often, also just show, not the link that distributes as interface resource, the not logical communication channel of bearing interface.It should be noted that the limit registration earlier at link place, confirm a limit, be actually two links of correspondence of having confirmed the link identity equality of two interfaces on two equipment.
The present invention has set up the network topological diagram based on atm network, and after having realized dynamic management function to this network topological diagram, webmaster just can utilize the network topological diagram of preserving in each atm network equipment at each LA Management Room transfer management message, realization is based on the network interconnection management of ATM, referring to step 3.
Because may there be multilink in two LA Management Rooms in atm network, but can only select to determine one of them communication port, be used for carrier signaling or transmit data; So before each LA Management Room transfer management message of atm network, the selection that also needs to communicate passage is determined.The selection of communication port is determined to be indicated by higher level equipment usually, the process of indication communication port as shown in Figure 9, wherein " LINKID " in " COMM_REQ " request message is the chain line of request as communication port, this message will send in all communication ports of this interface, if there is not the main communication port of not using, then in being designated the communication port of LINKID, link sends; " LINKID " in the message " COMM_COM " is for being designated as the chain line of communication port, and this message also sends on all communication ports of this interface.In order to prevent the link loopback, in message, include the device number that sends message.
Owing to after higher level equipment is received " COMM_ACK " confirmation message, just on the communication port after the switching, accept and send data; And data are just accepted and send to subordinate equipment immediately on the communication port after the switching after returning " COMM_ACK " message; So, when " COMM_ACK " message in transport process, if send the data of two equipment rooms, then loss of data.Thereby the switching message between interface need be provided with has limit priority.
, can use and select the same flow process of communication port to realize when switching to other communication ports from main with communication port.
Also need to carry out the selection of communication between devices passage and the interface management work of switching for the interface of setting up.When increasing the physical link fault of an interface or carrying logical communication channel newly, need to select to determine a communication link; If higher level equipment then sends new communications channel indication, switch new communication port again after receiving response; If subordinate equipment then sends handoff request, receive after the indication and switch again.As shown in figure 10, wherein:
Atm network device discovery adjacent device, and be subordinate equipment, when perhaps subordinate equipment detects link failure, need to send selection or handoff request message " COMM_REQ " to higher level equipment, carry out the selection or the switching of passage;
Atm network device discovery adjacent device, and be higher level equipment, when perhaps higher level equipment detects link failure, will select a new communication port, select or switch to indicate message " COMM_COM " by sending to subordinate equipment, this communication port is selected or switched to the indication subordinate equipment;
After subordinate equipment is successfully selected or switched to the respective communication passage, need send to higher level equipment and select or handoff response message " COMM_ACK " the notice higher level equipment;
Higher level equipment is to the response of the refusal of subordinate equipment in the atm network, and subordinate equipment is by sending and selects or switch refusal message " COMM_REJ " to realize to the refusal response of higher level equipment.
Except docking port select or the management of switching, also comprise the management of resource on the docking port, distributing on the interface and the application resource is actually repeating query application VPI, VCI and bandwidth on the trunking port of each link on the interface.In fact the interface resource management has only a tables of data, resource of distributing on this tables of data record interface and the corresponding relation that is connected, the process of concrete Resources allocation is as follows: at first, resource bid for the interface connection management, according to the link on the interface, from article one link, order is applied on each link; Then, select to determine the link that bandwidth satisfies the demands according to the bandwidth on the link, and on this link, apply for VPI, VCI; At last, VPI, the VCI of distribution and the relay slogan of link correspondence are recorded in the tables of data.
In order to guarantee the fail safe of network management, the present invention also provides the cryptographic means that LA Management Room is transmitted data message.Whether leave an encrypted domain in the data message that promptly transmits in atm network, it is effective to be used for verification msg.Encrypt and adopt the MD5 algorithm, whether encrypt and to select by the user.The password of encrypting carries in the message of collection network topology, and the Crypted password of each equipment can be inequality.
The present invention can specifically be applied in as shown in figure 11 the atm network, and NMS (webmaster) receives on the device A.System sets up network topology and interconnecting channel automatically, and NMS just can manage and safeguard that by device A NMS distinguishes by device number certain equipment is operated to any one equipment in the network
Claims (18)
1. implementation method is managed in the network interconnection based on asynchronous transfer mode, it is characterized in that comprising:
A, the relaying virtual path identifier by the atm network equipment interface is set, the default value of Virtual channe identifiers are set up the interconnecting channel of atm network equipment room;
B, atm network equipment are by finding adjacent atm device to being adjacent the atm network equipment transmission handshake request message that connects, to carry out the foundation of network topological diagram;
C, the network equipment carry out maintenance update by sending connection status upgrading message to being adjacent the atm network equipment that connects to the network topological diagram of setting up based on atm network;
The network topological diagram that d, basis have been set up carries out the network interconnection management based on ATM, and it specifically comprises the steps:
D1, determine the channel of LA Management Room communication link and employing according to the network topological diagram in the network equipment;
The channel that d2, utilization are determined transmits message at LA Management Room, realizes the network interconnection management based on ATM.
2. the network interconnection management implementation method based on asynchronous transfer mode according to claim 1 is characterized in that described step b comprises:
B1, atm network equipment outwards send the handshake request message;
B2, the handshake message that receives in abutting connection with the atm network device responds that links to each other with this atm network equipment;
B3, atm network equipment judge whether be present in the network topological diagram in abutting connection with atm network equipment according to the response message content, if exist, and execution in step b4 then, otherwise, execution in step b5;
B4, do not do any processing;
B5, be to create interface, and preserve, simultaneously the network topological diagram of preserving is sent in abutting connection with atm network equipment in abutting connection with atm network equipment.
3. the network interconnection management implementation method based on asynchronous transfer mode according to claim 2 is characterized in that described handshake request content of message comprises: the device number that sends message end atm network equipment.
4. the network interconnection management implementation method based on asynchronous transfer mode according to claim 2, it is characterized in that the content of the response message of described handshake request message comprises: response message transmitting terminal atm network equipment is the chain line of this link assignment.
5. the network interconnection management implementation method based on asynchronous transfer mode according to claim 2 is characterized in that described step b5 comprises:
B51, judge in abutting connection with atm network equipment whether be higher level's network equipment, if, execution in step b52 then, otherwise, execution in step b53;
B52, be to create interface, distribute links sign in abutting connection with atm network equipment, and be stored in the network topological diagram, simultaneously the network topological diagram of preserving is sent in abutting connection with atm network equipment, upgrade the network topological diagram of oneself in abutting connection with atm network equipment according to the network topological diagram of receiving;
B53, be to create interface, and be stored in the network topological diagram, simultaneously the network topological diagram of preserving is sent in abutting connection with atm network equipment, upgrade the network topological diagram of oneself in abutting connection with atm network equipment according to the network topological diagram of receiving in abutting connection with atm network equipment.
6. the network interconnection management implementation method based on asynchronous transfer mode according to claim 1 is characterized in that described step c comprises:
C1, the network equipment outwards send connection status upgrading message, the network topological diagram of its preservation are notified all of its neighbor network equipment of adjacency;
C2, the connection status upgrading message of receiving in abutting connection with network equipment basis carry out the renewal of the network topological diagram of oneself.
7. the network interconnection management implementation method based on asynchronous transfer mode according to claim 6 is characterized in that described step c1 comprises:
The atm network equipment of c11, transmission connection status message repeatedly sends connection status upgrading message to the adjacency network equipment, has write down the network equipment number of process and the network equipment number of adjacency thereof in the message;
C12, the network equipment that receives connection status upgrading message judge whether there is the network equipment number that is adjacent in the message, if exist, then no longer duplicate and send this connection status upgrading message to the network equipment of this adjacency, otherwise, duplicate this connection status upgrading message of transmission to the network equipment of adjacency.
8. according to claim 6 or 7 described network interconnection management implementation methods, it is characterized in that described step c2 comprises based on asynchronous transfer mode:
C21, the network topological diagram of preserving on the network topological diagram in the connection status the received upgrading message and the network equipment is compared, judge wherein corresponding connection status inconsistent whether be that the adjacent side or the local terminal network equipment of the opposite end network equipment do not have route to the opposite end LA Management Room, if, execution in step c22 then, otherwise, execution in step C23;
C22, be as the criterion with the network topological diagram of the opposite end that receives and upgrade the network topological diagram that the local terminal network equipment is preserved;
C23, do not carry out the renewal of network topological diagram in the local terminal network equipment.
9. the network interconnection management implementation method based on asynchronous transfer mode according to claim 8 is characterized in that described step c22 comprises:
C221, judge the carrying of connection status upgrading message the timestamp value whether greater than the timestamp value of the message of the nearest receipts of preserving in the local terminal network equipment, if, execution in step c222, otherwise, execution in step c23;
C222, be as the criterion with the network topological diagram of the opposite end that receives and upgrade the network topological diagram that the local terminal network equipment is preserved.
10. the network interconnection management implementation method based on asynchronous transfer mode according to claim 6 is characterized in that: the network equipment of the described outside transmission connection status upgrading message of step c1 comprises:
The atm network equipment that the network connection state at place changes specifically comprises:
Two networks based on ATM are merged into a network, and former two networks based on ATM are included and be stored in the network equipment in the network topological diagram;
Network based on ATM splits into two sub-networks, and a former network based on ATM is included and be stored in the network equipment in the network topological diagram;
When increasing a limit in the network of ATM, be stored in the atm network equipment in the whole network network topological diagram;
When discharging a limit in the network of ATM, be stored in the atm network equipment in the whole network network topological diagram;
And the atm network equipment that satisfies the time requirement of timed sending connection status upgrading message.
11. the network interconnection management implementation method based on asynchronous transfer mode according to claim 10, it is characterized in that: step c1 also comprises the process of the atm network equipment of determining that network connection state changes, and being divided into is three kinds of situations:
C13, behind new equipment of discovering network topology, notify the user to confirm this equipment;
Device number for confirming will be stored in the network configuration topological diagram all the time, during as if fault, and with report and alarm, communication disruption;
For unacknowledged equipment, after the equipment fault, will in network topological diagram, disappear, just often, do not accept configuration, not as the equipment of link road by process;
C14, after two equipment rooms increase a fillet, notify the user to confirm this fillet;
Limit for confirming will be stored in the network topological diagram all the time, and during as if fault, with report and alarm, interface interrupts;
For unacknowledged limit, after the fault, will in network topological diagram, disappear, the internal memory of creating the interface application also will discharge; Just often, also not as the limit of link road by process;
C15, after interface increases a link, notify the user to confirm this link;
Link for confirming will be stored in the tables of data of interface all the time, during as if fault, and with report and alarm, link down;
For unacknowledged link, after the fault, will in the interface data table, disappear, just often, the also link that does not distribute, the not logical communication channel of bearing interface as interface resource.
12. the network interconnection management implementation method based on asynchronous transfer mode according to claim 1 is characterized in that described steps d 1 comprises:
D11, determine the communication link of LA Management Room;
D12, judgement are initiated to select whether the network equipment of definite channel is undernet atm network equipment, if, execution in step d13, otherwise, execution in step d14;
D13, subordinate's atm network equipment send the connection request message to higher level's atm network equipment;
D14, higher level's atm device are determined available communication port chain line, and send to subordinate's atm network equipment;
After d15, subordinate's atm network equipment receive this message, confirmation message is replied to higher level's atm network equipment, thereby determine the channel that the atm network communication between devices adopts.
13. the network interconnection management implementation method based on asynchronous transfer mode according to claim 12, it is characterized in that: described steps d 11 comprises:
D111, according to the link number on the interface, from article one link, order is carried out the connection resource application on each link;
D112, selection are determined the link that bandwidth meets the demands, and are carried out the application of VPI, VCI for this link;
D113, will be recorded in the tables of data, thereby determine the LA Management Room communication link for VPI, the VCI of this link assignment and the relay slogan of link correspondence.
14. the network interconnection management implementation method based on asynchronous transfer mode according to claim 12 is characterized in that the message that transmits among described steps d 13, d14, the d15 having limit priority in transmission course.
15. the network interconnection management implementation method based on asynchronous transfer mode according to claim 1 is characterized in that: be provided with one in the message that is transmitted in the steps d 2 and be used for whether effectively encrypted domain of verification msg.
16. whether effectively the network interconnection management implementation method based on asynchronous transfer mode according to claim 1 is provided with encrypted domain in the message that it is characterized in that being transmitted in the described steps d 2, be used to deposit verification msg password.
17. the network interconnection management implementation method based on asynchronous transfer mode according to claim 1 is characterized in that described network topological diagram provides following route:
Offer the route of devices communicating/application program;
And offer the route of connection management, this route further comprises:
Only specify the general route of terminal point network equipment number: specify end device number, and use the route that the DIJSTRA algorithm obtains;
Active and standby route on the virtual path VP ring: comprise active and standby two routes, two routes have been passed through all devices on the VP ring respectively;
Specify the route of intermediate equipment: the route of specifying the intermediate equipment of process;
Static routing: indicate by the starting point route of all devices of process to terminal;
Satisfy the route of communication bandwidth requirements: the limit of not satisfying communication bandwidth requirements before carrying out general route calculating is set to fault, the general route that calculates then.
18. the network interconnection management implementation method based on asynchronous transfer mode according to claim 17, the route that it is characterized in that described appointment intermediate equipment is for to obtain by following steps:
E, determine the intermediate equipment of appointment, and calculate by the general route of starting point to intermediate equipment;
F, calculating are by intermediate equipment general route to terminal;
G, judge whether two general routes have repeated plant, if having, then all limits of repeated plant are set to fault, execution in step e, otherwise, obtain to specify the routing procedure of intermediate equipment to finish.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101453413A (en) * | 2007-12-04 | 2009-06-10 | 华为技术有限公司 | Method and apparatus for automatic topology discovery and resource management in PBB network |
| CN102055635B (en) * | 2009-11-02 | 2015-04-01 | 中兴通讯股份有限公司 | TM method for Ethernet ring network and ring network node |
| CN102025543B (en) * | 2010-12-16 | 2012-12-19 | 中国电子科技集团公司第三十研究所 | Permanent virtual circuit (PVC) topology construction method |
| CN105099904B (en) | 2014-04-30 | 2018-06-05 | 华为技术有限公司 | A kind of method, apparatus and system of definite intermediary routing node |
| CN106792790B (en) * | 2016-03-31 | 2021-04-16 | 新华三技术有限公司 | AP upgrading method and device |
| CN110688259B (en) * | 2019-09-26 | 2024-02-06 | 上海仪电（集团）有限公司中央研究院 | Private cloud backup recovery system and backup recovery method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1214846A (en) * | 1996-03-28 | 1999-04-21 | 英国电讯有限公司 | Method of transmitting ATM cell over ATM network |
| JP2002208955A (en) * | 2001-01-05 | 2002-07-26 | Matsushita Electric Ind Co Ltd | Voice band transmitter and voice band transmission method and system thereof |
| JP2002232454A (en) * | 2001-02-01 | 2002-08-16 | Fujitsu Ltd | Method for interconnecting lsrs |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1214846A (en) * | 1996-03-28 | 1999-04-21 | 英国电讯有限公司 | Method of transmitting ATM cell over ATM network |
| JP2002208955A (en) * | 2001-01-05 | 2002-07-26 | Matsushita Electric Ind Co Ltd | Voice band transmitter and voice band transmission method and system thereof |
| JP2002232454A (en) * | 2001-02-01 | 2002-08-16 | Fujitsu Ltd | Method for interconnecting lsrs |
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