CN103795570A - Unicast message recovery method and device of stacking switch system with ring topology - Google Patents
Unicast message recovery method and device of stacking switch system with ring topology Download PDFInfo
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Abstract
The invention provides a unicast message recovery method of a stacking switch system with ring topology. The uicast message recovery method of the stacking switch system with the ring topology is applied to member devices. The member devices are connected with one another through stacking ports. The unicast message recovery method of the stacking switch system with the ring topology comprises the steps of (1) using one stacking port as a port for receiving messages, and using another stacking port as a port for sending the messages to generate a standby forwarding path table; (2) if the port sending unicast messages without loopback identifiers is the stacking port which is connected with a fault point, adding the loopback identifiers to the unicast messages, carrying out loopback on the unicast messages with the added loopback identifiers, and then carrying out forwarding according to the standby forwarding path table; (3) forwarding unicast messages with the loopback identifiers according to the standby forwarding path table, wherein the target member devices of the unicast messages with the loopback identifiers are other member devices.
Description
Technical field
The present invention relates to network communications technology field, relate in particular to a kind of unicast message restoration methods and device of stacked switchboard system of ring topology.
Background technology
IRF(Intelligent Resilient Framework, intelligent elastic framework) be that a kind of stacked switchboard system is realized technology, utilize software virtualization technology, at least two network equipments are linked together, carry out after necessary configuration, be virtualized into one " distributed apparatus ".Use this Intel Virtualization Technology can gather hardware resource and the software disposal ability of multiple devices, realize collaborative work, the unified management of multiple devices and uninterruptedly safeguard.
IRF can streamlining management, and after forming, user can login IRF system by the arbitrary port of any member device, and all member devices in IRF are carried out to unified management.The high reliability of IRF is embodied in many aspects, for example: IRF is made up of many member devices, Master(master) equipment is responsible for the Operations, Administration and Maintenance of IRF, Slave(from) equipment also can process business in as backup; Once Master equipment fault, system can the new Master of rapid automatic election, does not interrupt, thereby realized the 1:N backup of equipment with assurance business; In addition, the IRF link between member device is supported polymerizable functional, and the physical link between IRF and upper and lower layer equipment is also supported polymerizable functional, can backup each other and also can carry out load balancing, thereby further improved the reliability of IRF between multilink.IRF has good extended capability, by increasing member device, can expand easily port number, the bandwidth of IRF; Because each member device has CPU, can independent process protocol massages, carry out message repeating, so IRF expanding treatment ability easily.
Along with appearance and the development of the new Network such as voice, video, the reliability of network is had higher requirement.These business are very responsive to the interruption of flow, therefore, after breaking down, how can recover as early as possible forwarding service, the problem solving with regard to becoming IRF Technology Need.
Summary of the invention
In view of this, the invention provides a kind of unicast message restoration methods of stacked switchboard system of ring topology, be applied on the member device of described stacked switchboard system, described member device is connected to respectively two in other member devices by two stacking opening, and described method comprises:
Take a stacking opening as receiving the port of message, generate forwarding route table for subsequent use take another stacking opening as the port that sends message;
To the unicast message without loopback mark, be the stacking opening that connects fault point if send the port of this message, add loopback mark, will after the unicast message loopback of interpolation loopback mark, forward according to forwarding route table for subsequent use;
The unicast message with loopback mark that is other member devices to object member device, forwards according to forwarding route table for subsequent use.
The present invention also provides a kind of unicast message recovery device of stacked switchboard system of ring topology, be applied on the member device of described stacked switchboard system, described member device is connected to respectively two in other member devices by two stacking opening, and described device comprises:
Forwarding route table generation unit for subsequent use, for take a stacking opening as receiving the port of message, generates forwarding route table for subsequent use take another stacking opening as the port that sends message;
Loopback unit, for the unicast message to without loopback mark, is the stacking opening that connects fault point if send the port of this message, adds loopback mark, will after the unicast message loopback of interpolation loopback mark, forward according to forwarding route table for subsequent use;
Loopback retransmission unit, for the unicast message with loopback mark that is other member devices to object member device, forwards according to forwarding route table for subsequent use.
From above technical scheme, embodiments of the invention add after loopback mark by the unicast message that need to forward by fault point, send from its object member device of another chain road direction of ring topology according to forwarding route table for subsequent use, realize the fast quick-recovery of unicast service after fault occurs, reduce the time of flow interrupt, improved the availability of stacked switchboard system.
Accompanying drawing explanation
Fig. 1 is that a kind of ring topology of stacked switchboard system connects exemplary plot;
Fig. 2 is the unicast message restoration methods flow chart of the stacked switchboard system of ring topology in the embodiment of the present invention one;
Fig. 3 is the flow chart of message unicast forwarding on member device in the embodiment of the present invention two;
Fig. 4 is a kind of hardware structure diagram of the member device of stacked switchboard system;
Fig. 5 is the building-block of logic of the unicast message recovery device of the stacked switchboard system of a kind of ring topology in the present invention.
Embodiment
The realization of IRF is divided into two kinds of mode: software I RF and Hardware I RF.In software I RF, while forwarding across the data traffic of member device, message repeating information cannot be carried to other member devices, and message needs to re-start list item through each member device and searches and forward.In Hardware I RF, between member device, connect by the stacking opening with specific function, descriptor information (determining the information how message forwards) can be carried to other member devices by stacking opening, in IRF, forward according to descriptor information.
Stacking opening be on member device for port interconnected between member device, be a kind of logic interfacing.A corresponding physical port of stacking opening possibility, also may be formed by multiple physical port polymerizations, to reach the effect that strengthens bandwidth and link backup.
Between the member device of IRF, conventionally adopt two kinds of topologys: chain topological sum ring topology.The capable topology of chain is in turn connected into string by each member device; In ring topology, two of each member device stacking opening are connected with the stacking opening of two other member device respectively, and all member devices connect into ring.Ring topology is more reliable than chain topology, in the time there is link failure in chain topology, can cause IRF division; And in ring topology when certain link failure, can form chain topology, the business of IRF can not be affected.Interface channel between the stacking opening of two member devices is called IRF link.
In IRF, the topology that each member device and neighbours' member device are collected whole IRF by mutual IRF hello packet.IRF hello packet can carry topology information, comprises the contents such as stacking opening annexation, member device numbering, member device priority.Each member device is in the known topology information of local record and known topology information is periodically sent from stacking opening, receiving after neighbours' topology information, the topology information of upgrading local record, like this, all member devices all can be collected complete topology information.
According in the topology information of collecting, each member device knows message will forward and could arrive certain other member device from which stacking opening of oneself, transmits thereby generate frame level.For example, in the IRF shown in Fig. 1, member device 10, member device 20, member device 30 and member device 40 are connected to the Hardware I RF of ring topology by two stacking opening separately, wherein, between member device 10 and member device 20, member device 40, be directly connected by IRF link respectively, between member device 30 and member device 20, member device 40, be directly connected by IRF link respectively.After topology information collection is complete, the frame level on member device 10 is transmitted as shown in table 1:
| Object member device numbering | Stacking slogan | Frame jumping figure |
| Member device 10 | NULL | 0 |
| Member device 20 | Stacking opening-10-20 | 1 |
| Member device 30 | Stacking opening-10-20 | 2 |
| Member device 40 | Stacking opening-10-40 | 1 |
Table 1
Wherein, object member device numbering is the numbering that message leaves last member device before IRF; Stacking slogan is the numbering of the stacking opening of on this member device, this message repeating being gone out, and its value is that this message leaves last member device before IRF for NULL represents this member device, and this message will forward by user port rather than stacking opening; Frame jumping figure be arrive this message leave last member device before IRF also need through hop count.
In hardware pile system, message is in the time entering IRF, the member device that receives this message is searched forwarding-table item, if this message leaves the destination interface of IRF on other member devices, can in message, increase descriptor information, descriptor information comprises object member device, destination interface and other control informations, and wherein destination interface is the user port that object member device goes out this message repeating IRF.Like this, message can be transmitted and be forwarded by the frame level of descriptor information and member device in IRF system.When message arrives after the member device at destination interface place, the member device at destination interface place is deleted the descriptor information in message, forwards it to object user port.
In prior art, in the time breaking down in IRF system, as certain member device fault or certain IRF link failure, perceive after fault generation with the direct-connected member device in fault point, can be by the information broadcast breaking down to other member devices in IRF.Still take the IRF in Fig. 1 as example, if the IRF link down between member device 20 and member device 30, member device 20 can be broadcasted the message of " member device 30 is unreachable ", member device 30 also can be broadcasted the message of " member device 20 is unreachable ", receive that the member device of these message upgrades the topology information of local record, by the time on each member device the topology information of local record again reach stable after, just can transmit according to new topology information renewal frame level.And before frame level has been transmitted renewal, each member device is still transmitted to E-Packet according to original frame level, for example, object member device is numbered to 30 message, member device 10 is still transmitted and is sent it to member device 20 according to local frame level; Member device 20 is searched local frame level and is transmitted, and finds that member device 30 is unreachable, by this packet loss.Like this, just cause finding that fault transmits this of having upgraded in section to frame level considerable time, occurred the interruption of flow.
The unicast message restoration methods that the embodiment of the present invention one proposes a kind of stacked switchboard system of ring topology solves the problems referred to above.The method of embodiment mono-is applied on the member device of stacked switchboard system, and in this stacked switchboard system, two of each member device stacking opening are connected with the stacking opening of other member devices respectively, make whole stacked switchboard system be connected to ring topology.The flow process of embodiment mono-as shown in Figure 2.
At step S210, take a stacking opening as receiving the port of message, generate forwarding route table for subsequent use take another stacking opening as the port that sends message.
On each member device of IRF, generate forwarding route table for subsequent use by two stacking opening, take a stacking opening as receiving the port of message, another stacking opening becomes the port that sends message.Like this, the forwarding route table for subsequent use of each member device comprises 2 records, article 1, the stacking opening that receives message in record is to send the stacking opening of message in the 2nd article of record, and the port that sends message in the 1st article of record is the stacking opening that receives message in the 2nd article of record.
Take the IRF shown in Fig. 1 as example, the forwarding route table for subsequent use generating on member device 10 is as shown in table 2:
| Receive the stacking opening of message | Send the stacking opening of message |
| Stacking opening 10-20 | Stacking opening 10-40 |
| Stacking opening 10-40 | Stacking opening 10-20 |
Table 2
The forwarding route table for subsequent use generating on member device 20 is as shown in table 3:
| Receive the stacking opening of message | Send the stacking opening of message |
| Stacking opening 20-10 | Stacking opening 20-30 |
| Stacking opening 20-30 | Stacking opening 20-10 |
Table 3
Forwarding route table for subsequent use on member device 30 and member device 40 can be released with reference to table 2 and table 3, repeats no more.
At step S220, to the unicast message without loopback mark, be the stacking opening that connects fault point if send the port of this message, add loopback mark, will after the unicast message loopback of interpolation loopback mark, forward according to forwarding route table for subsequent use.
After IRF system breaks down, can arrive fault by quick sensing with the direct-connected member device in fault point.With the direct-connected member device in fault point on, to the unicast message without loopback mark, it is the conventional unicast message forwarding through IRF, if need to send from the stacking opening that connects fault point, identify for this message adds loopback, and the message that will add loopback mark is from connecting the stacking opening internal loopback of fault point.After internal loopback, for connecting the member device of fault point, the stacking opening that connects fault point is the stacking opening that receives the unicast message after internal loopback, the member device that connects fault point is searched forwarding route table for subsequent use accordingly, finding another stacking opening is the port that sends message, the message that adds loopback mark is sent from another stacking opening.
In the optional execution mode of one, loopback mark can be added in descriptor information, in descriptor information, increase a setting field and represent whether this unicast message is the loopback message through fault point.
At step S230, the unicast message with loopback mark that is other member devices to object member device, forwards according to forwarding route table for subsequent use.
If the unicast message that certain member device is received from a stacking opening identifies with loopback, and the object member device of this message is not this equipment, searches after forwarding route table for subsequent use, sends this message from another stacking opening.
Between above-mentioned steps S220 and step S230, there is no sequential relationship.
In the present embodiment, be the unicast message of this member device to object member device, no matter whether it is with loopback mark, all send from the user port of this member device, forward the packet out IRF.
Other member devices to object member device, and the unicast message identifying without loopback, according to prior art, transmit and forward according to frame level.
Be other member devices and the unicast message with loopback mark to object member device, if searched after forwarding route table for subsequent use, the stacking opening that sends this message is the port that connects fault point, and this message is dropped because sending.May be now in IRF, to occur at least two fault points, may be also that the object member device of this message breaks down, and causes this message successfully to forward.
It should be noted that, IRF fault and according to for subsequent use forwarded routing table and forwarded loopback message in, still can carry out according to prior art that topology information is upgraded and frame level is transmitted renewal.After frame level is transmitted and has been upgraded, normal message forwarding path can be avoided fault point, now there will be no without the message of loopback mark and need to send from the stacking opening that connects fault point, each member device is transmitted and can be completed message repeating function according to frame level.
After the method for application the present embodiment, after breaking down in IRF, the member device that connects fault point can not abandon the unicast message that need to normally forward from connecting the stacking opening of fault point, but carry out internal loopback add loopback mark in unicast message after, and continue this message to send to object member device by another link of ring topology according to forwarding route table for subsequent use, reduced greatly cause in IRF fault transmit renewal process in unicast data flow time of interrupting, improved the availability of stacked switchboard system.
Still, take the stacked switchboard system IRF in Fig. 1 as example, the IRF link between member device 20 and member device 30 interrupts, and the member device 20 normally E-Packeting perceives fault, and its stacking opening 20-30 is the port that connects fault point.One enters IRF, its destination interface unicast message (now this unicast message identifies without loopback) on member device 30 by member device 10, transmits table 1 be sent to member device 20 by member device 10 according to its frame level.Member device 20 is searched local frame level and is transmitted, and finds that sending the port of this unicast message is stacking opening 20-30, in message, adds that loopback identifies and carry out internal loopback.After internal loopback, this unicast message is member device 30 with loopback mark, object member device, member device 20 is searched forwarding route table for subsequent use, according to receive this message port---stacking opening 20-30(is loopback port), finding the port of this unicast message of transmission is stacking opening 20-10, from stacking opening 20-10, this unicast message is sent to member device 10.Member device 10 and member device 40 all forward after this unicast message according to forwarding route table for subsequent use, and this unicast message arrives its object member device---member device 30, and are forwarded from user port by member device 30.
The embodiment of the present invention two provides a kind of idiographic flow that carries out unicast message forwarding on member device.It should be noted that, below the prerequisite of flow process have 2 points: one first generates forwarding route table for subsequent use, and generating mode is consistent with embodiment mono-, repeats no more; Once it two is that member device perceives certain stacking opening and is connected to fault point, immediately this stacking opening is labeled as to loopback port.
Refer to Fig. 3, at step S310, member device is received unicast message;
At step S320, member device judges that the object member device of this message is this equipment, if so, is forwarded to user port, if not, and execution step S330;
At step S330, member device judges that this unicast message, whether with loopback mark, if so, goes to step S370; If not, execution step S340;
At step S340, member device is searched frame level and is transmitted, and finds the stacking opening that sends this unicast message;
At step S350, member device judges that whether the stacking opening that sends this message is marked as loopback port, if so, goes to step S360; If not, send this unicast message;
At step S360, member device adds after loopback mark in this unicast message, sends the unicast message of having added loopback mark from loopback port internal loopback;
At step S370, member device is searched backup path and is transmitted, and finds the stacking opening the transmission that send with the unicast message of loopback mark.If this port has been marked as loopback port, abandon this message.
Realize corresponding with above-mentioned flow process, the present embodiment provides a kind of unicast message recovery device of stacked switchboard system of ring topology, operate on the member device of stacked switchboard system, this device can be realized by software, also can realize by the mode of hardware or software and hardware combining.Be embodied as example with software, as the device on a logical meaning, the present embodiment be CPU by member device by non-volatile memories wherein corresponding computer program instructions read operation in internal memory and form.Say from hardware view, except the CPU shown in Fig. 4, internal memory and nonvolatile memory, member device also comprises other hardware conventionally, as being responsible for forwarding chip of processing message processing etc.; May be also distributed equipment from this equipment of hardware configuration, may comprise that multiple interface cards are to carry out the expansion of message processing at hardware view.
Figure 5 shows that the unicast message recovery device of the business stacked switchboard system of the Hardware I RF of a kind of ring topology that the present embodiment provides, be applied on the member device of described IRF stacked switchboard system, described member device is connected to respectively two in other member devices by two stacking opening, this device comprises forwarding route table generation unit for subsequent use, loopback unit and loopback retransmission unit, wherein: forwarding route table generation unit for subsequent use is for the port take a stacking opening as reception message, generate forwarding route table for subsequent use take another stacking opening as the port that sends message, loopback unit is used for the unicast message without loopback mark, is the stacking opening that connects fault point if send the port of this message, adds loopback mark, will after the unicast message loopback of interpolation loopback mark, forward according to forwarding route table for subsequent use, the unicast message with loopback mark that it is other member devices to object member device that loopback retransmission unit is used for, forwards according to forwarding route table for subsequent use.
Described device also comprises destination interface retransmission unit, for the unicast message that is this equipment to object member device, sends from user port.
Described device can also comprise stacking retransmission unit, for the unicast message without loopback mark that is other member devices to object member device, transmits transmission according to frame level.
In the optional execution mode of one, described loopback mark is arranged in descriptor information.
Described device can also comprise loopback discarding unit, in the time that transmission is the stacking opening of connection fault point with the port of the unicast message of loopback mark, abandons described message.
From the execution mode of above the whole bag of tricks and device, can find out, transmit before having upgraded and abandon the unicast message forwarding by fault point in frame level with respect to prior art, each embodiment in the present invention need to send by the unicast message loopback of fault point, make it arrive object member device by another link of ring topology, make frame level transmit upgraded before as usual running of unicast service, reduce the time of fault recovery, improved the availability of stacked switchboard system.
The foregoing is only preferred embodiment of the present invention, in order to limit the present invention, within the spirit and principles in the present invention not all, any modification of making, be equal to replacement, improvement etc., within all should being included in the scope of protection of the invention.
Claims (10)
1. the unicast message restoration methods of the stacked switchboard system of a ring topology, be applied on the member device of described stacked switchboard system, described member device is connected to respectively two in other member devices by two stacking opening, it is characterized in that, described method comprises:
Take a stacking opening as receiving the port of message, generate forwarding route table for subsequent use take another stacking opening as the port that sends message;
To the unicast message without loopback mark, be the stacking opening that connects fault point if send the port of this message, add loopback mark, after having added the unicast message loopback of loopback mark, forward according to forwarding route table for subsequent use;
The unicast message with loopback mark that is other member devices to object member device, forwards according to forwarding route table for subsequent use.
2. method according to claim 1, is characterized in that, described method also comprises: the unicast message that is this equipment to object member device, sends from user port.
3. method according to claim 2, is characterized in that, described method also comprises: the unicast message without loopback mark that is other member devices to object member device, transmit transmission according to frame level.
4. according to the method described in claims 1 to 3 any one, it is characterized in that: described loopback mark is arranged in descriptor information.
5. method according to claim 1, is characterized in that, described method also comprises: be the stacking opening that connects fault point if send the port of the unicast message identifying with loopback, abandon described message.
6. the unicast message recovery device of the stacked switchboard system of a ring topology, be applied on the member device of described stacked switchboard system, described member device is connected to respectively two in other member devices by two stacking opening, it is characterized in that, described device comprises:
Forwarding route table generation unit for subsequent use, for take a stacking opening as receiving the port of message, generates forwarding route table for subsequent use take another stacking opening as the port that sends message;
Loopback unit, for the unicast message to without loopback mark, is the stacking opening that connects fault point if send the port of this message, adds loopback mark, after having added the unicast message loopback of loopback mark, forwards according to forwarding route table for subsequent use;
Loopback retransmission unit, for the unicast message with loopback mark that is other member devices to object member device, forwards according to forwarding route table for subsequent use.
7. device according to claim 6, is characterized in that, described device also comprises: destination interface retransmission unit, for the unicast message that is this equipment to object member device, sends from user port.
8. device according to claim 7, is characterized in that, described device also comprises: stacking retransmission unit, for the unicast message without loopback mark that is other member devices to object member device, transmit transmission according to frame level.
9. according to the device described in claim 6 to 8 any one, it is characterized in that: described loopback mark is arranged in descriptor information.
10. device according to claim 6, is characterized in that, described device also comprises: loopback discarding unit, in the time that transmission is the stacking opening of connection fault point with the port of the unicast message of loopback mark, abandons described message.
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| CN109302488A (en) * | 2018-10-31 | 2019-02-01 | 紫光华山信息技术有限公司 | Equipment cascading method, apparatus and host |
| CN109302488B (en) * | 2018-10-31 | 2022-02-11 | 新华三信息技术有限公司 | Equipment cascading method, device and host |
| CN109639573A (en) * | 2019-01-28 | 2019-04-16 | 新华三技术有限公司 | One provenance filters detection method and device |
| CN113377280A (en) * | 2020-03-09 | 2021-09-10 | 华为技术有限公司 | Storage system, request processing method and switch |
| WO2021179556A1 (en) * | 2020-03-09 | 2021-09-16 | 华为技术有限公司 | Storage system and request processing method, and switch |
| CN111654560A (en) * | 2020-06-02 | 2020-09-11 | 中电科航空电子有限公司 | Physical address table management interaction method for airborne software and hardware stack switch |
| CN111654560B (en) * | 2020-06-02 | 2022-10-21 | 中电科航空电子有限公司 | Physical address table management interaction method for airborne software and hardware stack switch |
| CN114615148A (en) * | 2022-03-16 | 2022-06-10 | 芯河半导体科技(无锡)有限公司 | Rapid link aggregation failover method |
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