CN102035741B - The retransmission method of unicast message and equipment in a kind of ring topology network - Google Patents
The retransmission method of unicast message and equipment in a kind of ring topology network Download PDFInfo
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Abstract
The retransmission method of unicast message and equipment in a kind of ring topology network, the method includes: in the loop network become by cascade port level joint group by least two member device, each member device is configured with the source-information of unicast message and the corresponding relation of output cascade port；After member device receives unicast message by the non-cascaded port on this equipment, as judged, this equipment is not the purpose equipment of this unicast message, then forward this unicast message according to described corresponding relation from the output cascade port corresponding with the source-information of this message；After other member devices cascade port from this equipment receives this unicast message, as judged, this equipment is not the purpose equipment of this unicast message, then the cascade of another from this equipment port forwards this unicast message.After using the present invention, bandwidth can be more evenly distributed on the link between each neighbor members's equipment, takes full advantage of existing link bandwidth resource, drastically increases network performance and quality, improve benefit.
Description
Technical field
The present invention relates to network data communication field, particularly relate to retransmission method and the equipment of unicast message in a kind of ring topology network.
Background technology
In existing networking structure, composition one system each data communications equipment between connect by UP() and DOWN(disconnect) cascade port be connected, physically formation one entirety, after these equipment cascadings formation topology can be chain or annular；Logically, this system can form a logical block by Topology Discovery Protocol.In other words, each equipment forming this system knows existence and the relevant information of other members in this system.They know that mode each other is that each equipment sends Topology Discovery message automatically after cascade port is linked, each equipment sends the information of oneself by UP and DOWN cascade port to the neighbor device of oneself, these information are transmitted between devices, final each equipment has both known about the necessary situation of other members of internal system, thus these member devices logically can regard an entirety as, it is treated as a virtual logic device and is managed.
In ring network topology technology, for avoiding the occurrence of the broadcast storm of message, generally using the mode of a cascade port on choke system certain member device internal, the shortcoming of this kind of mode is to have the bandwidth in a direction can idle waste all the time；Though or possess certain load sharing function, function is limited, and flow can not be equally distributed on two ports realize effective utilization of band width in physical resource by member device more intelligently, relatively.
Existing technical scheme is owing to can not make full use of bandwidth, therefore when there is even number member device in system, can there is the situation that network bandwidth resources is idle.It is exemplified below:
Example 1: when two equipment cascadings, there will be DOWN direction under certain conditions has flow, and UP direction is without the situation of flow.As it is shown in figure 1, when equipment 1 and equipment 2 cascade, squeeze into flow from the port of equipment 2.Owing to being no matter the UP port from equipment 2 or from DOWN port, it is all 1 jumping to the distance of equipment 1 from equipment 2, therefore equipment 2 can select one (can specify that selection UP port or DOWN port) from UP and DOWN port, thus there will be flow and only walks the situation of in UP and DOWN link.When selecting DOWN port, UP port bandwidth is idle, thus causes the flow in DOWN direction to be far longer than the flow in UP direction.
Example 2: as in figure 2 it is shown, when equipment 1, equipment 2, equipment 3 and equipment 4 cascaded series circularize network, there will be a direction between two adjacent member devices in the case of big flow and data congestion occurs, and other direction also has the phenomenon of bandwidth left.
According to existing flow processing method, if the situation of the flow that the UP port of investigation equipment 1 and DOWN port transmit counterclockwise, equipment 1 is to equipment 4, the flow of equipment 3, and equipment 2 is to the flow of equipment 4, the link between equipment 1 and equipment 4 will be passed through counterclockwise, therefore, equipment 1 will be equipment 2 on the link between equipment 13 times of the flow of carrying to the flow carried on the link between equipment 4.
It addition, in the case of member device quantity is odd number, prior art does not the most provide each member device and how to carry out the scheme of flow adjustment according to congestion situation.
Summary of the invention
For solving the problems referred to above, the invention provides retransmission method and the equipment of unicast message in a kind of ring topology network, with the problem solving when carrying out unicast message and forwarding, link congestion easily to occur in prior art.
For solving the problems referred to above, the invention provides the retransmission method of unicast message in a kind of ring topology network, including:
In the loop network become by cascade port level joint group by least two member device, each member device is configured with the source-information of unicast message and the corresponding relation of output cascade port；
After member device receives unicast message by the non-cascaded port on this equipment, as judged, this equipment is not the purpose equipment of this unicast message, then forward this unicast message according to described corresponding relation from the output cascade port corresponding with the source-information of this unicast message；After other member devices cascade port from this equipment receives this unicast message, as judged, this equipment is not the purpose equipment of this unicast message, then the cascade of another from this equipment port forwards this unicast message.
Further,
The source-information of described unicast message is the port numbers of the non-cascaded port receiving described unicast message；
Described corresponding relation is: when receiving the port numbers of non-cascaded port of unicast message and being odd number, a corresponding cascade port；When receiving the port numbers of non-cascaded port of unicast message and being even number, another cascade port corresponding.
Further,
The source-information of described unicast message is No. modID of the exchange chip receiving described unicast message；
Described corresponding relation is: when receiving No. modID of exchange chip of unicast message and being odd number, a corresponding cascade port；When receiving No. modID of exchange chip of unicast message and being even number, corresponding another one cascade port.
Further, described method may also include that
When being not known by described loop network and occurring congested, the forwarding strategy of transport plane is set to forward according to minimum hop count routing method by the control plane of each member device；When knowing that described loop network occurs congested, the forwarding strategy of transport plane is set to forward according to described corresponding relation by the control plane of each member device；
Forward this unicast message according to described corresponding relation from the output cascade port corresponding with the source-information of this unicast message, specifically include: described member device carries out message forwarding according to locally located forwarding strategy.
Further,
Know that described loop network occurs congested, specifically include: after forming described loop network, each member device selects a member device as main equipment, and periodically to link congestion information and the remaining bandwidth information of the described main equipment respective port of report, described main equipment calculate whether network occurs congested according to the above-mentioned information received；If it is, network has occurred that this information congested notifies to other member devices in described loop network, it is congested that each member device knows that described loop network occurs.
Further, described method may also include that
Forming after described loop network, each member device selects a member device as main equipment, and described main equipment judges whether the member device number forming current annular topological network is less than or equal to a preset value；The most then notify that the forwarding strategy of transport plane is set to forward according to minimum hop count routing method by the control plane of all member devices；Otherwise, notify that the forwarding strategy of transport plane is set to forward according to described corresponding relation by the control plane of all each member devices；
Forward this unicast message according to described corresponding relation from the output cascade port corresponding with the source-information of this unicast message, specifically include: described member device carries out the forwarding of this unicast message according to locally located forwarding strategy.
Further, described method may also include that
Control plane through calculating available free bandwidth on the cascade port generation link congestion judging on member device and another cascade port, according to locally configured described corresponding relation, from the source-information of the unicast message corresponding with the cascade port of this generation link congestion, select the source-information partly or entirely currently having unicast message to flow into, this source-information selected is re-set as corresponding with another cascade port on this equipment, wherein, the summation of the flow of the unicast message of selected source-information is less than idle bandwidth.
Correspondingly, present invention also offers a kind of equipment, be applied to miscellaneous equipment by cascading in the ring topology network that port level joint group becomes, including: memory module, message receiver module, judge module and packet forwarding module；
Described memory module is for storing the source-information of unicast message and the corresponding relation of output cascade port；
Message receiver module is for receiving unicast message by the non-cascaded port on described equipment or cascade port；
Described judge module is for judging that whether this equipment be the purpose equipment of the described unicast message that described message receiver module receives；
Described packet forwarding module is for when described judge module judges the purpose equipment that this equipment is not described unicast message, the described unicast message received by the non-cascaded port described equipment from the output cascade port described message receiver module of forwarding corresponding with the source-information of this unicast message according to described corresponding relation, or the described unicast message that another cascade port described message receiver module of forwarding from this equipment is received by the cascade port on described equipment.
Further,
The source-information of described unicast message is the port numbers of the non-cascaded port receiving described unicast message；
Described corresponding relation is: when receiving the port numbers of non-cascaded port of unicast message and being odd number, a corresponding cascade port；When receiving the port numbers of non-cascaded port of unicast message and being even number, another cascade port corresponding.
Further,
The source-information of described unicast message is No. modID of the exchange chip receiving described unicast message；
Described corresponding relation is: when receiving No. modID of exchange chip of unicast message and being odd number, a corresponding cascade port；When receiving No. modID of exchange chip of unicast message and being even number, corresponding another one cascade port.
After using the present invention, bandwidth can be more evenly distributed on the link between each neighbor members's equipment, takes full advantage of existing link bandwidth resource, drastically increases network performance and quality, improve benefit.
Accompanying drawing explanation
Fig. 1 show in prior art the topological diagram of the loop network formed by two member device cascades；
Fig. 2 show in prior art the topological diagram of the loop network formed by four member device cascades；
Fig. 3 show member device in the embodiment of the present invention and carries out the flow chart of unicast message forwarding according to corresponding relation；
Fig. 4 show the forwarding process figure of unicast message in the embodiment of the present invention；
Fig. 5 show in the embodiment of the present invention topological diagram of the loop network formed by eight member device cascades.
Detailed description of the invention
Below in conjunction with accompanying drawing, embodiments of the invention are described in detail.It should be noted that in the case of not conflicting, the embodiment in the application and the feature in embodiment can be mutually combined.
In the present embodiment, the retransmission method of unicast message in a kind of ring topology network, including:
1, in the loop network become by cascade port level joint group by least two member device, each member device is configured with the source-information of unicast message and the corresponding relation of output cascade port；
It is, in general, that the number constituting the exchange chip of each member device is likely to be different, its number can be 1 ~ 6, the density of the chip can arranged on veneer when depending on design；For ease of distinguishing, each exchange chip is equipped with modID.Externally allow to connect 12/24/48 physical port, and each port has corresponding port numbers on each exchange chip.Therefore, the source-information of message involved in the present invention can use the port numbers (hereinafter referred to as source port) of the non-cascaded port receiving this message or receive No. modID (the hereinafter referred to as source modID) of exchange chip of this message.The most above-mentioned corresponding relation can be configured to: when entering the source port number (or source modID) of message of this equipment and being odd number, forwards this message from cascade port (such as DOWN port)；When entering the source port number (or source modID) of message of this equipment and being even number, forward this message from another cascade port (such as UP port).Additionally, this corresponding relation may be additionally configured to: when enter the source port number (or source modID) of message of this equipment in a certain numerical range time, forward this message from cascade port (such as DOWN port)；When enter the source port number (or source modID) of message of this equipment not in above-mentioned numerical range time, forward this message from another cascade port (such as UP port).Thus, it can be known that configuration mode has multiple, as long as ensureing that these unicast messages can be shared the most fifty-fifty on two cascade ports of this equipment by member device according to the difference of the source-information of unicast message.
2, when a member device by it on after non-cascaded port receives unicast message, as judged, this equipment is not the purpose equipment of this message, then search corresponding output cascade port according to the source-information of this message from above-mentioned corresponding relation, then forward this message from this output cascade port；And after the cascade port that other member devices are from this equipment receives this unicast message, as judged, this equipment is not the purpose equipment of this unicast message, then the cascade of another from this equipment port forwards this unicast message.
Assume that corresponding relation is: when entering the source port number (or source modID) of message of this equipment and being odd number, forward this message from UP port；When entering the source port number (or source modID) of message of this equipment and being even number, DOWN port forwards this message；Then as it is shown on figure 3, member device by it, non-cascaded port receives unicast message after, according to the source-information got, when judging that this source-information is odd number, forward this message from UP port；Otherwise, this message is forwarded from DOWN port.
From above-mentioned flow process it can be seen that the present invention is exactly the trend controlling unicast message according to the source-information flowing into member device, by the unicast message of the separate sources entering member device is taked different routing directions, thus reach to make full use of the purpose of bandwidth.
Specify according to existing protocol, when each member device utilizes respective UP and DOWN cascade port to establish the link with other neighbor device, Topology Discovery process will be triggered, once this Topology Discovery process has restrained, all member devices will form a logic entirety, and each member device will appreciate that the necessary information of other each member devices, such as MAC(MediaAccessControl, medium access control) address, physical location, membership, in oneself which orientation etc..
After above topology discovery procedure convergence terminates, each member device can initialize respectively, it is therefore an objective to makes member device after being successfully received data message, it is possible to is distributed to above UP and DOWN port go by uniform flow.
For unicast message, message carries the information of single goal equipment.Generally, unicast message is before flowing into loop network, each member device has learned that the position of miscellaneous equipment by Topology Discovery process, therefore, the member device being firstly received this unicast message in loop network can be according to the purpose facility information of this message and current network topology structure, above-mentioned unicast message as the forward-path of this unicast message, is then forwarded to the purpose equipment specified by the path of the jumping figure minimum of current location arrival purpose equipment by selection along this path.
But as described in background, when the unicast message quantity mailing to a direction in a period of time is a lot, uses above-mentioned minimum hop count routing method as simple, then can cause heavier loads on certain paths, it is possible to cause network congestion.As network occurred congested in the case of, also message needs to be sent to purpose equipment through this paths, then can increase network burden further, may result in network a large amount of packet loss time serious.And now, other path likely also has a lot of remaining bandwidth be not utilized.
Therefore, conceive in conjunction with foregoing invention, the forwarding of unicast message can be used minimum hop count routing method and utilize above-mentioned corresponding relation and carry out the mode that the method for Path selection combines.With two application examples, this mode is further described below.
Application example one
As shown in Figure 4, the retransmission method to unicast message, comprise the following steps:
A, state loop network in composition after, each member device selects a member device as main equipment, and periodically to link congestion information and the remaining bandwidth information of this main equipment respective port of report, main equipment calculate whether current annular network occurs congested according to the above-mentioned information received；If it is, network has occurred that this information congested notifies to other member devices in this loop network；
Wherein, link congestion information is: the packet drop information etc. of UP port and DOWN port on each member device.
B, know loop network occur congested time, the forwarding strategy of transport plane is set to forward according to above-mentioned corresponding relation by the control plane of each member device；Otherwise, the forwarding strategy of transport plane is set to forward according to minimum hop count routing method by the control plane of each member device；
C, when a unicast message enters this loop network from non-cascaded port, receive the member device of this unicast message at first after judging the purpose equipment that this equipment is not this message, according to locally located message forwarding strategy, this message can be forwarded on its neighbours' member device, its neighbours' member device can be after its cascade port receiving this message receives this message, this unicast message is forwarded further, until being sent on purpose equipment by another one cascade port.
For example, as on each member device, the corresponding relation of configuration is all: forward unicast message when source port number is even number from the DOWN port of this equipment, forward unicast message when source port number is odd number from the UP port of this equipment；Certainly, corresponding relation can also be that source port number forwards unicast message from the UP port of this equipment when being even number, forwards unicast message from the DOWN port of this equipment, when source port number is odd number merely just as a example by former corresponding relation.Under the network topology situation of Fig. 2, in current network, existing link occurs congested, then from the unicast message of the 0th of equipment 1 the or the 2nd port entrance loop network, if purpose equipment is equipment 3, so this message can be forwarded to equipment 4 by the DOWN mouth of equipment 1, and the DOWN mouth through equipment 4 reaches equipment 3 the most again；And from the unicast message of the 1st of equipment 1 the or the 3rd port entrance loop network, if purpose equipment is equipment 3, then this message can be forwarded to equipment 2 by the UP port of equipment 1, and the UP mouth through equipment 2 reaches equipment 3 the most again.In the case of the most each port has packet receiving, the two-way flow of cascade port is essentially identical.And, example from above illustrates with 4 equipment, even if making odd number equipment into, its processing mode is also the same.
Application example two
After ring topology convergence is stable, main equipment first determines whether that whether the member device number forming current annular topological network is less than or equal to a preset value, wherein, this preset value is during design ring topology network, by user according to cascade port bandwidth and full load in the case of, the maximum of flow preparing to flow through certain cascade port of certain member device on some routing direction estimates and is arranged on each member device formed in this ring topology network；In this way, then notify that the forwarding strategy of transport plane is set to forward according to minimum hop count routing method by the control plane of each member device；Otherwise, notify that the forwarding strategy of transport plane is arranged by the control plane of each member device to forward according to above-mentioned corresponding relation.
Wherein, as shown in Figure 5, according to minimum hop count routing scheme, assume that all customer flows next from non-cascaded port of now equipment 1, equipment 2, equipment 3 and equipment 4 all should be through the DOWN port of equipment 4, then the summation of these customer flows " prepares to flow through the maximum of the flow of certain cascade port of certain member device " exactly on some routing direction.And the bandwidth cascading port is a fixed value, just it is fixed up after system designs.
When a unicast message enters this loop network from non-cascaded port, receive the member device of this unicast message at first after judging the purpose equipment that this equipment is not this message, according to locally located message forwarding strategy, this message can be forwarded on its neighbours' member device, its neighbours' member device can be after its cascade port receiving this message receives this message, this unicast message is forwarded further, until being sent on purpose equipment by another one cascade port.
Correspondingly, equipment described in the present embodiment, it is applied to miscellaneous equipment by cascading in the ring topology network that port level joint group becomes, including: memory module, message receiver module, judge module and packet forwarding module；
Described memory module is for storing the source-information of unicast message and the corresponding relation of output cascade port；
Message receiver module is for receiving unicast message by the non-cascaded port on described equipment or cascade port；
Described judge module is for judging that whether this equipment be the purpose equipment of the described unicast message that described message receiver module receives；
Described packet forwarding module is for when described judge module judges the purpose equipment that this equipment is not described unicast message, the described unicast message received by the non-cascaded port described equipment from the output cascade port described message receiver module of forwarding corresponding with the source-information of this unicast message according to described corresponding relation, or the described unicast message that another cascade port described message receiver module of forwarding from this equipment is received by the cascade port on described equipment.
It is preferred that
The source-information of described unicast message is the port numbers of the non-cascaded port receiving described unicast message；
Described corresponding relation is: when receiving the port numbers of non-cascaded port of unicast message and being odd number, a corresponding cascade port；When receiving the port numbers of non-cascaded port of unicast message and being even number, another cascade port corresponding.
It is preferred that
The source-information of described unicast message is No. modID of the exchange chip receiving described unicast message；
Described corresponding relation is: when receiving No. modID of exchange chip of unicast message and being odd number, a corresponding cascade port；When receiving No. modID of exchange chip of unicast message and being even number, corresponding another one cascade port.
Above-mentioned analysis is the static above-mentioned corresponding relation of configuration, its result be exactly the bandwidth cascading port be can be equally distributed for the flow come from different exchange chips and port.But, network has that some happen suddenly and lasting flow sometimes, and the method for user access port is the most indefinite, according to the method described above, sharing of data stream on member device equalizes the most not, now, just can use dynamic monitoring routing method, it is exactly specifically: member device is when judged on this equipment cascades available free bandwidth on port generation link congestion and another cascade port, according to locally configured above-mentioned corresponding relation, from the source-information of the unicast message corresponding with the cascade port of this generation link congestion, select the source-information partly or entirely currently having unicast message to flow into, this source-information selected is re-set as corresponding with another cascade port on this equipment, i.e. obtain new corresponding relation.In this manner it is possible to make to separate a part of flow through the flow of congested cascade port from originally, arrive at from another one cascade port.Certainly, these summations being adjusted to the flow by the cascade port forwarding with idle bandwidth are necessarily less than idle bandwidth.
The effect that so can reach is exactly: the flow of the non-cascaded port on the equipment that those flows are big, its direction flowed out, being possible not only to is UP and DOWN port, and the bandwidth ratio above UP and DOWN port that it takies simultaneously also can be adjusted according to practical situation.
It should be noted that when pile system uses ring topology to carry out networking, said method of the present invention also can be used.
One of ordinary skill in the art will appreciate that all or part of step in said method can instruct related hardware by program and complete, described program can be stored in calculating device-readable storage medium, such as read only memory, disk or CD etc..Alternatively, all or part of step of above-mentioned application example can also use one or more integrated circuit to realize.Correspondingly, each module/unit in above-mentioned application example can realize to use the form of hardware, it would however also be possible to employ the form of software function module realizes.The present invention is not restricted to the combination of the hardware and software of any particular form.
Claims (10)
1. a retransmission method for unicast message in ring topology network, including:
In the loop network become by cascade port level joint group by least two member device, when knowing that loop network occurs congested or topological network member device number to be more than a preset value, each member device configures the source-information of unicast message and the corresponding relation of output cascade port；
After member device receives unicast message by the non-cascaded port on this equipment, as judged, this equipment is not the purpose equipment of this unicast message, then forward this unicast message according to described corresponding relation from the output cascade port corresponding with the source-information of this unicast message；After other member devices cascade port from this equipment receives this unicast message, as judged, this equipment is not the purpose equipment of this unicast message, then the cascade of another from this equipment port forwards this unicast message；
The source-information of described unicast message includes: the port numbers receiving the non-cascaded port of described unicast message or No. modID of the exchange chip receiving described unicast message.
2. the method for claim 1, it is characterised in that:
The source-information of described unicast message is the port numbers of the non-cascaded port receiving described unicast message；
Described corresponding relation is: when receiving the port numbers of non-cascaded port of unicast message and being odd number, a corresponding cascade port；When receiving the port numbers of non-cascaded port of unicast message and being even number, another cascade port corresponding.
3. the method for claim 1, it is characterised in that:
The source-information of described unicast message is No. modID of the exchange chip receiving described unicast message；
Described corresponding relation is: when receiving No. modID of exchange chip of unicast message and being odd number, a corresponding cascade port；When receiving No. modID of exchange chip of unicast message and being even number, corresponding another one cascade port.
4. the method as described in any one in claims 1 to 3, it is characterised in that described method also includes:
When being not known by described loop network and occurring congested, the forwarding strategy of transport plane is set to forward according to minimum hop count routing method by the control plane of each member device；When knowing that described loop network occurs congested, the forwarding strategy of transport plane is set to forward according to described corresponding relation by the control plane of each member device；
Forward this unicast message according to described corresponding relation from the output cascade port corresponding with the source-information of this unicast message, specifically include: described member device carries out message forwarding according to locally located forwarding strategy.
5. method as claimed in claim 4, it is characterised in that:
Know that described loop network occurs congested, specifically include: after forming described loop network, each member device selects a member device as main equipment, and periodically to link congestion information and the remaining bandwidth information of the described main equipment respective port of report, described main equipment calculate whether network occurs congested according to the above-mentioned information received；If it is, network has occurred that this information congested notifies to other member devices in described loop network, it is congested that each member device knows that described loop network occurs.
6. the method as described in any one in claims 1 to 3, it is characterised in that described method also includes:
Forming after described loop network, each member device selects a member device as main equipment, and described main equipment judges whether the member device number forming current annular topological network is less than or equal to a preset value；The most then notify that the forwarding strategy of transport plane is set to forward according to minimum hop count routing method by the control plane of all member devices；Otherwise, notify that the forwarding strategy of transport plane is set to forward according to described corresponding relation by the control plane of all each member devices；
Forward this unicast message according to described corresponding relation from the output cascade port corresponding with the source-information of this unicast message, specifically include: described member device carries out the forwarding of this unicast message according to locally located forwarding strategy.
7. the method as described in any one in claims 1 to 3, it is characterised in that described method also includes:
Control plane through calculating available free bandwidth on the cascade port generation link congestion judging on member device and another cascade port, according to locally configured described corresponding relation, from the source-information of the unicast message corresponding with the cascade port of this generation link congestion, select the source-information partly or entirely currently having unicast message to flow into, this source-information selected is re-set as corresponding with another cascade port on this equipment, wherein, the summation of the flow of the unicast message of selected source-information is less than idle bandwidth.
8. an equipment, is applied to miscellaneous equipment by cascading in the ring topology network that port level joint group becomes, including: memory module, message receiver module, judge module and packet forwarding module；
Described memory module is for storing the described equipment corresponding relation at the source-information with output cascade port knowing unicast message that loop network is configured when there is the member device number of congested or topological network more than a preset value；
Message receiver module is for receiving unicast message by the non-cascaded port on described equipment or cascade port；
Described judge module is for judging that whether this equipment be the purpose equipment of the described unicast message that described message receiver module receives；
Described packet forwarding module is for when described judge module judges the purpose equipment that this equipment is not described unicast message, the described unicast message received by the non-cascaded port described equipment from the output cascade port described message receiver module of forwarding corresponding with the source-information of this unicast message according to described corresponding relation, or the described unicast message that another cascade port described message receiver module of forwarding from this equipment is received by the cascade port on described equipment；
The source-information of described unicast message includes: the port numbers receiving the non-cascaded port of described unicast message or No. modID of the exchange chip receiving described unicast message.
9. equipment as claimed in claim 8, it is characterised in that:
The source-information of described unicast message is the port numbers of the non-cascaded port receiving described unicast message；
Described corresponding relation is: when receiving the port numbers of non-cascaded port of unicast message and being odd number, a corresponding cascade port；When receiving the port numbers of non-cascaded port of unicast message and being even number, another cascade port corresponding.
10. equipment as claimed in claim 8, it is characterised in that:
The source-information of described unicast message is No. modID of the exchange chip receiving described unicast message；
Described corresponding relation is: when receiving No. modID of exchange chip of unicast message and being odd number, a corresponding cascade port；When receiving No. modID of exchange chip of unicast message and being even number, corresponding another one cascade port.
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| CN103023773B (en) | 2011-09-23 | 2015-05-27 | 华为技术有限公司 | Method, device and system for forwarding message in multi-topology network |
| CN104283811B (en) | 2013-07-09 | 2017-10-03 | 新华三技术有限公司 | Message forwarding method and device |
| CN104734961B (en) * | 2013-12-20 | 2017-10-24 | 中国航空工业集团公司第六三一研究所 | Route selection method based on FC exchange networks |
| CN103763135B (en) * | 2014-01-06 | 2017-05-10 | 新华三技术有限公司 | PE equipment traffic scheduling method and device |
| CN104821917B (en) * | 2015-03-27 | 2018-10-09 | 上海博达数据通信有限公司 | A kind of topology discovery method for virtual switch system |
| CN113225241B (en) * | 2021-04-19 | 2022-09-06 | 中国科学院计算技术研究所 | Data transmission congestion control method and system for ring-shaped data message network |
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