CN105227463A - Communication means in a kind of distributed apparatus between business board - Google Patents
Communication means in a kind of distributed apparatus between business board Download PDFInfo
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- CN105227463A CN105227463A CN201410264274.1A CN201410264274A CN105227463A CN 105227463 A CN105227463 A CN 105227463A CN 201410264274 A CN201410264274 A CN 201410264274A CN 105227463 A CN105227463 A CN 105227463A
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Abstract
The invention provides the communication means between business board in a kind of distributed apparatus, comprising: issue list item and ACL between plate; Incoming interface mates the message received according to ACL, obtains corresponding performing an action; According to network interface message being sent to corresponding business board that performs an action; Each business board, according to list item between body, carries out applying the CPU that the message processing and entered by network interface is sent to corresponding business board to the message that network interface enters; Between current business board is according to plate, list item does not find the next business board corresponding to message, then the outgoing interface utilizing the business board of forward mode to find forwards the packet out distributed apparatus.Thus make business board process this message according to list item between plate and forward, utilize passage between inner panel to forward when being forwarded to next business board, thus improve the problem of networking complexity.
Description
Technical field
The present invention relates to communication technical field, the communication means particularly in a kind of distributed apparatus between business board.
Background technology
Along with the development of information technology, the demand of enterprise to network equipment safety service is more and more higher.Distributed apparatus can add the safety service board of different mode according to own service demand.Wherein, also there is various modes in the use of safety service board in distributed apparatus of different mode, specifically comprises the forward mode of forwarding service board and the transparent mode of transparent service board.
When polylith different business board mixed insertion in prior art in distributed apparatus uses, forwarding service plate configures route table items or forwarded list item, transparent service plate configures transparent interface pair, connect with external netting twine between forwarding service plate and transparent service plate, in distributed apparatus, message is forwarded by external netting twine between different business boards according to forwarded list item and transparent interface.
But the scheme of prior art, needs in each business board to configure a large amount of forwarded list items, requires higher to network management personnel, thus the problem causing networking too complicated.
Summary of the invention
In view of this, the invention provides the communication means between business board in a kind of distributed apparatus, to solve the problem of networking complexity in prior art.
Embodiments provide the communication means between business board in a kind of distributed apparatus, it is characterized in that, distributed apparatus comprises passage between master control board card, at least one business board and inner panel, wherein, master control board card and business board include CPU, the network interface that business board also comprises shunting hardware and is connected with shunting hardware, at least one business board described comprises the business board of a forward mode;
The CPU of master control board card issues list item between the plate that management-side configures according to flow control policy to the CPU of each business board, and the incoming interface to distributed apparatus issues access control list ACL;
Incoming interface receives and the ACL that issues of the CPU preserving master control board card, and mates the message received according to ACL, obtains message corresponding perform an action identical with feature in ACL, and carries out corresponding performing an action to the message received; When described performing an action as the message received being sent to corresponding business board, then the message received is sent to the network interface of corresponding business board;
The CPU of each business board receives list item between plate that master control board card issues, and list item between plate is kept in the shunting hardware of self, according to list item between body, carry out applying the CPU that the message processing and entered by network interface is sent to corresponding business board to the message that network interface enters;
Between current business board is according to plate, list item does not find the next business board corresponding to message, then the outgoing interface utilizing the business board of forward mode to find forwards the packet out distributed apparatus.
Preferably, described flow control policy comprises the inter-process path of traffic characteristic and correspondence; Described inter-process path comprises multiple path point, each path point comprises at least one business board; Between described plate, list item comprises the next path point of traffic characteristic and correspondence.
Preferably, the described message entered network interface carries out applying the CPU that the message processing and entered by network interface is sent to corresponding business board, do not finding the next business board corresponding to message, the outgoing interface then utilizing the business board of forward mode to find forwards the packet out distributed apparatus, specifically comprises:
The CPU of business board carries out application process according to list item between the plate of self to the message that network interface enters;
After application process terminates, according to list item between plate, the CPU of business board judges whether this message has next corresponding path point, if, this message is sent to the CPU of the business board in next path point by passage between inner panel, if not, then find outgoing interface according to the forwarded list item in the business board of forward mode, and according to this outgoing interface, this message repeating is gone out distributed apparatus.
Preferably, described method comprises further:
At least one business board is configured to bypass mode according to the instruction of management-side by the CPU of master control board card;
The CPU of business board is when the mode of operation of self is bypass mode, and the message that list item enters network interface between the CPU of described business board is according to the plate of self abandons this message after carrying out application process.
Preferably, when at least one business board described comprises the business board of transparent mode, described method comprises further:
In described inter-process path, be arranged in the business board of all transparent modes before the business board of forward mode, between plate, the traffic characteristic of list item is incoming interface; Be arranged in the business board of all transparent modes after the business board of forward mode, between plate, the traffic characteristic of list item is outgoing interface.
Preferably, described between current business board is according to plate list item do not find the next business board corresponding to message, then the outgoing interface utilizing the business board of forward mode to find forwards the packet out distributed apparatus, specifically comprises:
When current business board is the business board of forward mode, current business board does not find the next business board corresponding to message according to list item between plate, the forwarded list item learnt in advance then utilizing current business board to preserve, search the outgoing interface corresponding to message, and according to this outgoing interface, this message repeating is gone out distributed apparatus;
When current business board is the business board of transparent mode, current business board does not find the next business board corresponding to message according to list item between plate, outgoing interface information then entrained by this message, utilizes this outgoing interface that this message repeating is gone out distributed apparatus.
Preferably, when distributed apparatus also comprises exchange board, described method comprises further:
The CPU of master control board card issues list item between plate to exchange board;
Exchange the shunting hardware acceptance of board and list item between the plate that issues of the CPU preserving this master control board card;
Wherein, this exchange board comprises the exchange chip as shunting hardware.
Embodiments provide the communication means between business board in a kind of distributed apparatus, the CPU of master control board card issues list item between plate from the CPU of each business board of trend, and issue access control list ACL to the incoming interface of distributed apparatus, when performing an action as being sent to corresponding business board in ACL corresponding to the message that incoming interface receives, this message is sent to corresponding business board, thus make business board process this message according to list item between plate and forward, passage between inner panel is utilized to forward when being forwarded to next business board, thus improve the problem of networking complexity.
Accompanying drawing explanation
Fig. 1 is the method flow diagram that the embodiment of the present invention provides;
Fig. 2 is the apparatus structure schematic diagram that the embodiment of the present invention provides.
Embodiment
According to prior art, when polylith different business board mixed insertion in distributed apparatus uses, forwarding service plate configures route table items or forwarded list item, transparent service plate configures transparent interface pair, connect with external netting twine between forwarding service plate and transparent service plate, in distributed apparatus, message is forwarded by external netting twine between different business boards according to forwarded list item and transparent interface.
But the scheme of prior art, needs in each business board to configure a large amount of forwarded list items, requires higher to network management personnel, thus the problem causing networking too complicated.
As shown in Figure 1, for the problems referred to above, embodiments provide the communication means between business board in a kind of distributed apparatus, distributed apparatus comprises passage between master control board card, at least one business board and inner panel, wherein, master control board card and business board include CPU, the network interface that business board also comprises shunting hardware and is connected with shunting hardware, and at least one business board described comprises the business board of a forward mode;
Step 101: the CPU of master control board card issues list item between the plate that management-side configures according to flow control policy to the CPU of each business board, and the incoming interface to distributed apparatus issues access control list ACL;
Step 102: incoming interface receives and the ACL that issues of the CPU preserving master control board card, and according to ACL, the message received is mated, obtain message corresponding perform an action identical with feature in ACL, and corresponding performing an action is carried out to the message received; When described performing an action as the message received being sent to corresponding business board, then the message received is sent to the network interface of corresponding business board;
Step 103: the CPU of each business board receives list item between plate that master control board card issues, and list item between plate is kept in the shunting hardware of self, according to list item between body, carry out applying the CPU that the message processing and entered by network interface is sent to corresponding business board to the message that network interface enters;
Step 104: and the outgoing interface utilizing the business board of forward mode to find forwards the packet out distributed apparatus.
According to such scheme, the CPU of master control board card issues list item between plate from the CPU of each business board of trend, and issue access control list ACL to the incoming interface of distributed apparatus, when performing an action as being sent to corresponding business board in ACL corresponding to the message that incoming interface receives, this message is sent to corresponding business board, thus make business board process this message according to list item between plate and forward, utilize passage between inner panel to forward when being forwarded to next business board, thus improve the problem of networking complexity.
Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
As shown in Figure 2, in the distributed apparatus that the embodiment of the present invention provides, comprise passage between master control board card, at least one business board and inner panel, wherein, master control board card and business board include CPU, internal memory and nonvolatile memory, the network interface that business board also comprises shunting hardware and is connected with shunting hardware, at least one business board described comprises the business board of a forward mode.
Wherein, in the distributed apparatus that the embodiment of the present invention provides, exchange board can also be comprised.
Each board in distributed apparatus is connected by inner switching network (Fabric).Wherein, exchange board be not necessary parts, when the network equipment have more Multi net voting access demand time, exchange board can be introduced.
Wherein, shunting hardware major function is be distributed to according to the rule that master control board card is specified by message flow on the business board of specifying to process.Taking cost into account, exchange chip is a kind of more satisfactory shunting hardware.Most typical in exchange chip is Ethernet switching chip, its relative inexpensiveness, except supporting the diverter function that ACL (Access Control List (ACL)) is such, also supports to carry out two layers or three layers of forwarding to message.Certain embodiment of the present invention does not get rid of other implementation, such as adopt ASIC (ApplicationSpecificIntegratedCircuit, integrated circuit) or logical device realize, this depends on that developer is for shunting the considering of flexibility ratio, efficiency and cost; Below be only embodied as example to illustrate with exchange chip.
In embodiments of the present invention, the CPU of master control board card, for managing other boards, is such as configured each other boards.The CPU of master control board card also has an important task to be list item between each business board generation board by various procotol, say by OSPF (OpenShortestPathFirst, ospf) agreement and ARP (AddressResolutionProtocol, address resolution protocol) agreement study generating network forwarding-table item, or by MPLS (Multi-ProtocolLabelSwitching, multiprotocol label switching) agreement study label forwarding list item, then list item between plate is issued on each business board.With existing frame loosely coupled devices unlike, between the plate of the embodiment of the present invention, list item issues by master control borad is unified.In existing frame loosely coupled devices, because each business board card is an independently network node in a network, have independently management ip address, that is, can be clear that from network management system this board is a network equipment on network; Now list item between each board usual plate oneself being generated oneself by various procotol.Wherein, master control borad also needs the business board configuration network forwarding-table item for forward mode, utilizes forwarded list item to find the outgoing interface of message to make message in the business board of forward mode.
Due in the embodiment of the present invention between plate list item to be that master control board card is unified generate, therefore the advantage of the traditional distributed network equipment has been merged in the design of control plane, has avoided the shortcoming of loosely coupled devices.
After the incoming interface of distributed apparatus receives protocol massages, according to the ACL list item that self preserves, protocol massages is mated, obtains message corresponding perform an action identical with feature in ACL.As shown in table 1, be the ACL list item that distributed apparatus incoming interface is preserved.
Table 1:
| Traffic characteristic | Correspondence performs an action |
| a | Abandon |
| b | On deliver to business board 1 |
| c | On deliver to business board 2 |
| d | Directly transfer equipment |
| …… | …… |
Wherein, distributed apparatus can comprise multiple incoming interface, and according to the above-mentioned ACL list item that the incoming interface of distributed apparatus is preserved, the traffic characteristic received when incoming interface is a, then by this packet loss; The traffic characteristic received when incoming interface is b, then by this message up sending to business board 1; The traffic characteristic received when incoming interface is c, then by this message up sending to business board 2; The traffic characteristic received when incoming interface is d, then this message is directly transferred equipment.Etc..
Wherein, this traffic characteristic can be the multiple traffic characteristics comprising source IP address, incoming interface sequence number etc.
Wherein, each business board is for protocol massages, it mode conventionally can send control plane process, certainly also has a small amount of protocol massages to be the enterprising row relax of CPU that can stay business board, is equivalent to business board and has shared the task of little a part of procotol study.In the business board of certain embodiment of the present invention and the traditional distributed network equipment, so-called business board is essentially different again, first, the said business board of the present invention carries two tasks, one is the Business Processing to application of electronic report level, and another is the Business Processing of message being carried out to forwarded level; The Business Processing of so-called application layer refers to from open seven layer model and is containing the Business Processing network layer, such as FW (FireWall, fire compartment wall), IPS (IntrusionPreventionSystem, intrusion prevention system) and UAG (forefrontUnifiedAccessGateway, remote access service) to process of message etc.
Please refer to Fig. 2, the present invention allows network manager to carry out flexibly reasonably planning to the handling process of message.Keeper can by CPU (namely software view) the sending flow rate control strategy of network management interface to master control board card, this flow control policy comprises the traffic characteristic (characterizing specific message flow) of message and the inter-process path of correspondence, an inter-process path comprises one or more path point, each path point comprises at least one business board.The flow control policy issued for management-side as shown in table 2.
Table 2:
Example in table 2, manager can define source IP address (SIP) for after the message belonging to this network segment of 119.207.210.0/24 enters distributed apparatus by incoming interface, first through business board 1, then through business board 3, next again through business board 4, business board 6 is eventually passed.It is that the message of 202.200.221.0/24 is successively through business board 2, business board 3, business board 5 and business board 7 that keeper can define source IP address equally.
In embodiments of the present invention, the business board in the process path in table 2 has and only has the business board of a forward mode, and other are all the business boards of transparent mode.
First the CPU of master control board card is issued on the shunting hardware of each board according to list item between this flow control policy generation board, and is issued in the incoming interface of distributed apparatus after receiving the flow control policy from keeper.Wherein between this plate, list item comprises the next path point in traffic characteristic and corresponding inter-process path.List item between multiple plate can be kept between self plate in table by shunting hardware.Such as the message of SIP=119.207.210.0/24 is when entering distributed apparatus by incoming interface, according to message coupling, the correspondence got perform an action into by this message up sending to business board 1.Therefore, this message is delivered to the enterprising row relax of business board 1.It should be noted that herein, below unless otherwise noted, determine to send to the message of business board to be all the CPU's sending to business board by list item between inquiry plate.
In embodiments of the present invention, the traffic characteristic in the ACL list item preserved in incoming interface can be the source IP address of message; Between the plate preserved in the shunting hardware in business board, the traffic characteristic of list item can enter the incoming interface sequence number of distributed apparatus for message.As shown in table 3, for preserve in the shunting hardware of business board 1 plate between show.Between the plate in business board, list item includes interface sequence number and corresponding next path point.
Table 3:
| Incoming interface sequence number | Next path point |
| 1 | Business board 2 |
| 2 | Business board 3 |
| …… | …… |
For the business board in each path point, between the plate of himself, list item itself mainly comprises two parts meaning: first, the message of what traffic characteristic needs to carry out application process at this board, second, after processing this message, the next one will carry out applying which the board (namely next path point in table 3) processed is to this message.If do not comprise list item between plate corresponding to this message in table between the plate of business board, then illustrate that next path point of this message is generally empty.As shown in table 3, if business board 1 receives the message that incoming interface sequence number is 8, and do not include in table between the plate of this self shunting hardware interface sequence number be 8 plate between list item, then this message does not comprise next business board.
In embodiments of the present invention, because process path comprises and only includes the business board of a forward mode, therefore, in the processing sequence of the business board in process path, in the business board of all transparent modes before the business board of forward mode, between the plate of preservation, list item is message incoming interface sequence number and corresponding next path point; In the business board of all transparent modes after the business board of forward mode, between the plate of preservation, list item is message outgoing interface sequence number and corresponding next path point.Wherein, the outgoing interface of message is, the business board of forward mode utilizes the interface corresponding to this message that the forwarded list item learnt in advance is searched after carrying out application process to message.
And when current business board is the business board of forward mode, current business board does not find the next business board corresponding to message according to list item between plate, the forwarded list item learnt in advance then utilizing current business board to preserve, search the outgoing interface corresponding to message, and according to this outgoing interface, this message repeating is gone out distributed apparatus;
When current business board is the business board of transparent mode, current business board does not find the next business board corresponding to message according to list item between plate, outgoing interface information then entrained by this message, utilizes this outgoing interface that this message repeating is gone out distributed apparatus.
Take source IP address as the message of 119.207.210.0/24 be example.The incoming interface sequence number that this message enters distributed apparatus is 1, and wherein, the business board 1 in table 2, business board 3, business board 6 are the business board of transparent mode, and business board 4 is the business board of forward mode.
The incoming interface of distributed apparatus receives this message, mates this message, obtain corresponding to this message perform an action on send business board 1.This message is sent to business board 1 by the incoming interface of distributed apparatus; Business board 1 receives this message by network interface, according to the application process corresponding to this incoming interface 1 of list item between the plate that self shunting hardware is preserved, application process is carried out to this message, and the next path point found corresponding to this incoming interface, and this message is sent to business board 3 corresponding to next path point.The network interface of business board 3 receives this message, according to the application process corresponding to this incoming interface 1 of list item between the plate that self shunting hardware is preserved, application process is carried out to this message, and the next path found corresponding to this incoming interface, and this message is sent to business board 4 corresponding to this next path point.Business board 4 is the business board of forward mode, application process between the plate therefore preserved according to self shunting hardware corresponding to list item incoming interface 1, application process is carried out to this message, and according to the forwarded list item learnt in advance, two or three layers of forwarding are carried out to this message, find outgoing interface corresponding to this message 2.This message according to the next path point between the plate of self shunting hardware preservation corresponding to list item incoming interface, and is sent to business board 6 corresponding to this next path point by this business board 4.The network interface of business board 6 receives this message, according to the application process corresponding to this outgoing interface 2 of list item between the plate that self shunting hardware is preserved, application process is carried out to this message, and the next path point of searching corresponding to this message, but this incoming interface 1 does not comprise corresponding next path point in this business board 6, then illustrate that this message does not comprise next business board.Then this message is sent out distributed apparatus from the outgoing interface 2 found by business board 6.
Here it should be noted that: the upper network interface due to each board in the present invention is all that master control borad is visible, if outgoing interface is not at this business board, message can be forwarded from this outgoing interface by passage between plate by business board 6 equally.Suppose that outgoing interface is a network interface on business board 4, now message is sent to business board 4 by passage between plate by the CPU of business board 6, now message is without the need to the CPU through business board 4, can directly send from corresponding network interface through shunting hardware, certainly now shunting hardware does not need coupling distributing strategy table for the message of outgoing direction.
According to said process, for any one message in other message flows, processing procedure is similar, and only the incoming interface of message, process path and outgoing interface are different, no longer carefully state one by one herein.
In another embodiment, the network equipment of the present invention can be used as a bypass equipment, now business board can be configured to bypass mode according to the instruction of management-side by the CPU of master control board card, when business board is operated in bypass mode, it is after the application process completing message, can directly abandon this message, and without the need to carrying out forwarded process.Bypass mode is applicable to the application of various audit class usually, and its main target is audited to the message being entered this equipment by mirror-image fashion, abandons after obtaining auditing result.Because now message is all that mirror image enters, is the equal of a copy of message in normal repeating process, abandons immediately after therefore can completing audit.
In another embodiment, for the business board board of transparent mode, this message, for the message of specifying entrance to enter, sends according to pre-configured stationary exit by business board after the application process completing this message.Transparent mode can use under the scene such as IPS or online audit.As can be seen here, the network equipment of the present invention can use the various networking requirements of user, can configure corresponding mode of operation as required in different networking.
In embodiments of the present invention, passage between plate is also comprised between business board, between this plate, the material of passage can be fiber optic materials, also the similar devices of high speed transmission data function can be had for other, between this plate, passage is that distributed apparatus is set up when being polymerized, do not need to use external netting twine to connect, therefore there will not be the human failure of wiring error.
The CPU of master control board card issues list item between plate from the CPU of each business board of trend, and issue access control list ACL to the incoming interface of distributed apparatus, when performing an action as being sent to corresponding business board in ACL corresponding to the message that incoming interface receives, this message is sent to corresponding business board, thus make business board process this message according to list item between plate and forward, utilize passage between inner panel to forward when being forwarded to next business board, thus improve the problem of networking complexity.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, within the spirit and principles in the present invention all, any amendment made, equivalent replacement, improvement etc., all should be included within the scope of protection of the invention.
Claims (7)
1. the communication means in a distributed apparatus between business board, it is characterized in that, distributed apparatus comprises passage between master control board card, at least one business board and inner panel, wherein, master control board card and business board include CPU, the network interface that business board also comprises shunting hardware and is connected with shunting hardware, at least one business board described comprises the business board of a forward mode;
The CPU of master control board card issues list item between the plate that management-side configures according to flow control policy to the CPU of each business board, and the incoming interface to distributed apparatus issues access control list ACL;
Incoming interface receives and the ACL that issues of the CPU preserving master control board card, and mates the message received according to ACL, obtains message corresponding perform an action identical with feature in ACL, and carries out corresponding performing an action to the message received; When described performing an action as the message received being sent to corresponding business board, then the message received is sent to the network interface of corresponding business board;
The CPU of each business board receives list item between plate that master control board card issues, and list item between plate is kept in the shunting hardware of self, according to list item between body, carry out applying the CPU that the message processing and entered by network interface is sent to corresponding business board to the message that network interface enters;
Between current business board is according to plate, list item does not find the next business board corresponding to message, then the outgoing interface utilizing the business board of forward mode to find forwards the packet out distributed apparatus.
2. method according to claim 1, is characterized in that, described flow control policy comprises the inter-process path of traffic characteristic and correspondence; Described inter-process path comprises multiple path point, each path point comprises at least one business board; Between described plate, list item comprises the next path point of traffic characteristic and correspondence.
3. method according to claim 2, it is characterized in that, the described message entered network interface carries out applying the CPU that the message processing and entered by network interface is sent to corresponding business board, do not finding the next business board corresponding to message, the outgoing interface then utilizing the business board of forward mode to find forwards the packet out distributed apparatus, specifically comprises:
The CPU of business board carries out application process according to list item between the plate of self to the message that network interface enters;
After application process terminates, according to list item between plate, the CPU of business board judges whether this message has next corresponding path point, if, this message is sent to the CPU of the business board in next path point by passage between inner panel, if not, then find outgoing interface according to the forwarded list item in the business board of forward mode, and according to this outgoing interface, this message repeating is gone out distributed apparatus.
4. method according to claim 3, is characterized in that, described method comprises further:
At least one business board is configured to bypass mode according to the instruction of management-side by the CPU of master control board card;
The CPU of business board is when the mode of operation of self is bypass mode, and the message that list item enters network interface between the CPU of described business board is according to the plate of self abandons this message after carrying out application process.
5. method according to claim 3, is characterized in that, when at least one business board described comprises the business board of transparent mode, described method comprises further:
In described inter-process path, be arranged in the business board of all transparent modes before the business board of forward mode, between plate, the traffic characteristic of list item is incoming interface; Be arranged in the business board of all transparent modes after the business board of forward mode, between plate, the traffic characteristic of list item is outgoing interface.
6. method according to claim 1, it is characterized in that, described between current business board is according to plate list item do not find the next business board corresponding to message, then the outgoing interface utilizing the business board of forward mode to find forwards the packet out distributed apparatus, specifically comprises:
When current business board is the business board of forward mode, current business board does not find the next business board corresponding to message according to list item between plate, the forwarded list item learnt in advance then utilizing current business board to preserve, search the outgoing interface corresponding to message, and according to this outgoing interface, this message repeating is gone out distributed apparatus;
When current business board is the business board of transparent mode, current business board does not find the next business board corresponding to message according to list item between plate, outgoing interface information then entrained by this message, utilizes this outgoing interface that this message repeating is gone out distributed apparatus.
7. method according to claim 1, is characterized in that, when distributed apparatus also comprises exchange board, described method comprises further:
The CPU of master control board card issues list item between plate to exchange board;
Exchange the shunting hardware acceptance of board and list item between the plate that issues of the CPU preserving this master control board card;
Wherein, this exchange board comprises the exchange chip as shunting hardware.
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| CN111083059B (en) * | 2019-12-30 | 2023-04-25 | 杭州迪普科技股份有限公司 | Flow forwarding method in distributed equipment |
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| CN113079183A (en) * | 2021-04-25 | 2021-07-06 | 安徽科大擎天科技有限公司 | Inter-board communication system of distributed firewall and communication method thereof |
| CN113452619A (en) * | 2021-06-29 | 2021-09-28 | 杭州迪普科技股份有限公司 | ACL-based traffic flow shunting method and device |
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