CN102546422A - Message forwarding method in exchange chip, exchange chip and network device - Google Patents
Message forwarding method in exchange chip, exchange chip and network device Download PDFInfo
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- CN102546422A CN102546422A CN2012100180950A CN201210018095A CN102546422A CN 102546422 A CN102546422 A CN 102546422A CN 2012100180950 A CN2012100180950 A CN 2012100180950A CN 201210018095 A CN201210018095 A CN 201210018095A CN 102546422 A CN102546422 A CN 102546422A
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Abstract
The invention discloses a message forwarding method in an exchange chip, an exchange chip and a network device. The method comprises the following steps: the exchange chip determines the target output port of a received message from all ports per se according to the preset forwarding rule; when the target output port is the specified port of the exchange chip, the message is sent to a TM chip connected with the exchange chip; the message returned after being cached by the TM chip is received; and the message is forwarded by the target output port. By adopting the scheme provided by the embodiment of the invention, the message forwarding efficiency when the exchange chip is subject to hardware cache queue expansion on the basis of the TM chip is improved, and besides, the demand on hardware cache queue volume of the TM chip is lowered.
Description
Technical field
The present invention relates to the packet buffer technical field on the exchange chip in the communication technical field, relate in particular to message forwarding method, exchange chip and the network equipment in a kind of exchange chip.
Background technology
When transmit the exchange chip inside of message in switch; Meeting is done of short duration buffer memory in the hardware cache formation of the purpose output port of exchange chip; The size of hardware cache formation has determined the quantity that it can the buffer memory message; Exchange chip can adopt ASIC (Application Specific Integrated Circuit, ASIC) chip.
In real network; May in one section short period interval, produce burst flow in the exchange chip, the burst flow data volume than normal discharge usually is big, when burst flow is excessive; Exchange chip possibly occur can't forward whole messages at short notice; Therefore need be in the hardware cache formation packet buffer, the hardware cache formation is big more, and the message amount of ability buffer memory is just many more; When overstocking message amount in the hardware cache formation and surpass the capacity of buffer queue, packet drop will appear.
Usually the capacity of the hardware cache formation of exchange chip is limited, and the ability of therefore handling burst flow is also limited, for the ability of enhancement process burst flow, just need carry out additional extension to the hardware cache formation.
At present, formation is expanded to hardware cache, is employed in the method that connects TM (Traffic Management, traffic management) chip on the exchange chip usually and realizes that its structure is as shown in Figure 1.
The major function of TM chip is to expand the hardware cache capacity of queue of exchange chip through external mode, and flow is carried out uniform dispatching and management, and the TM chip can link to each other through the special purpose interface of chip chamber with exchange chip, like the Higig interface.
Specific as follows through the TM chip to the scheme that need carry out buffer memory and scheduling by the message that exchange chip is transmitted:
The message flow that the outside port of exchange chip (like the port one among Fig. 1-5) gets into; Earlier through the interface between exchange chip and the TM chip; Deliver in the TM chip; After carrying out buffer memory and scheduling by the TM chip, again through and exchange chip between interface return to exchange chip, and then message is forwarded from the purpose output port by exchange chip.
Such scheme of the prior art; When carrying out hardware cache formation expansion through the TM chip; The message flow that all outside ports of exchange chip get into all is sent to the TM chip and carries out caching process, and promptly all the purpose output ports to exchange chip all carry out hardware cache formation expansion.Specifically can pass through the output function of exchange of all outside ports of forbidding exchange chip; And force to be sent to the interface that links to each other with the TM chip to message by register and export; To realize that message after confirming the purpose output port on the exchange chip, is not directly to transmit through the purpose output port, but all is sent to TM chip buffer memory and scheduling; After the TM chip is handled it is returned to exchange chip, again through the output of purpose output port.
Yet, for some ports in the exchange chip, the situation of burst flow maybe not can appear through the message flow of its forwarding; So will pass through the message flow that this port is transmitted this moment, after also all handling through TM chip buffer memory and scheduling; Transmit again, then reduced message forwarding efficient, and; A large amount of messages carries out buffer memory through the TM chip to be handled with scheduling, and the hardware cache capacity of queue of TM chip is had relatively high expectations, and has increased the cost of TM chip.
Summary of the invention
The embodiment of the invention provides message forwarding method, exchange chip and the network equipment in a kind of exchange chip, in order to solve exist in the prior art based on the TM chip exchange chip is carried out hardware cache formation expansion the time message forward efficiency lower problem.
The embodiment of the invention provides the message forwarding method in a kind of exchange chip, comprising:
Exchange chip is transmitted rule according to preset message, the purpose output port of definite message that receives from each port of self;
When said purpose output port is the designated port of said exchange chip, send said message to the traffic management TM chip that links to each other with said exchange chip;
The said message that reception is returned behind said TM chip buffer memory;
Transmit said message through said purpose output port.
The embodiment of the invention also provides a kind of exchange chip, comprising:
Port is confirmed the unit, is used for transmitting rule according to preset message the purpose output port of definite message that receives from each port of this exchange chip;
First transmitting element is used for when said purpose output port is the designated port of this exchange chip, sends said message to the traffic management TM chip that links to each other with this exchange chip;
Receiving element is used to receive the said message that behind said TM chip buffer memory, returns;
Second transmitting element is used for transmitting said message through said purpose output port.
The embodiment of the invention also provides a kind of network equipment, comprising: above-mentioned exchange chip and above-mentioned TM chip.
Beneficial effect of the present invention comprises:
In the method that the embodiment of the invention provides; Exchange chip is for the message that receives; At first from each port of self, determine the purpose output port of this message, and when definite this purpose output port is the designated ends mouth, send this message to the TM chip that links to each other with exchange chip; And at this message through TM chip buffer memory and after returning to exchange chip, exchange chip is transmitted this message through the purpose output port.Can know that therefrom exchange chip no longer is all to send to the TM chip for the message that receives; Carry out caching process by the TM chip, but be the message of designated port selectively, just via transmitting again behind the TM chip buffer memory the purpose output port; Thereby reduced quantity through TM chip buffer memory message; And then improved the message forward efficiency, and, requirement can be reduced to the hardware cache capacity of queue of TM chip.
Description of drawings
Fig. 1 is for carrying out the system configuration sketch map of buffer queue expansion to exchange chip through the TM chip;
Fig. 2 provides the flow chart of the message forwarding method in the exchange chip for the embodiment of the invention;
Fig. 3 is the flow chart of the message forwarding method in the exchange chip that provides in the embodiment of the invention 1;
The structural representation of the exchange chip that Fig. 4 provides for the embodiment of the invention 2;
The structural representation of the network equipment that Fig. 5 provides for the embodiment of the invention 2.
Embodiment
The implementation of the message forward efficiency when based on the TM chip exchange chip being carried out hardware cache formation expansion in order to provide raising; The embodiment of the invention provides message forwarding method, exchange chip and the network equipment in a kind of exchange chip; Below in conjunction with Figure of description the preferred embodiments of the present invention are described; Should be appreciated that preferred embodiment described herein only is used for explanation and explains the present invention, and be not used in qualification the present invention.And under the situation of not conflicting, embodiment and the characteristic among the embodiment among the application can make up each other.
The embodiment of the invention provides the message forwarding method in a kind of exchange chip, and is as shown in Figure 2, comprising:
Step S201, exchange chip are according to the preset rule of transmitting, the purpose output port of definite message that receives from each port of self.
Step S202, when this purpose output port is the designated port of this exchange chip, send this message to the TM chip that links to each other with this exchange chip.
This message that step S203, reception are returned behind this TM chip buffer memory.
Step S204, transmit this message through this purpose output port.
Preferable, not the message of the designated port of exchange chip for the purpose output port, cancellation can directly be transmitted this message through this purpose output port through the caching process of TM chip to message.
Below in conjunction with accompanying drawing, method provided by the invention, exchange chip and the network equipment are described in detail with specific embodiment.
Embodiment 1:
The system configuration of forming with exchange chip shown in Figure 1 and TM chip in the embodiment of the invention 1 is an example, and the message forwarding method in the above-mentioned exchange chip is described in detail, and is as shown in Figure 3, specifically comprises following treatment step:
Exchange chip in step S301, the switch receives message through the outside port of self, and for example, this port can be like a port in the port one-port among Fig. 15.
In the embodiment of the invention, exchange chip can be an asic chip.
Step S302, exchange chip are transmitted rule according to preset message, the purpose output port of definite this message that receives from each port of self; Should preset message forwarding rule can be that two layer message is transmitted rule, also can be that three-tier message is transmitted rule, specifically transmits rule and can adopt the forwarding rule of using in the prior art, no longer is described in detail at this.
Step S303, judge whether this purpose output port is the designated port of exchange chip,,, get into step S307 if not designated port if designated port gets into step S304.
In this step, whether FFP (Fast Filtering Process, filtration treatment fast) function that can be through exchange chip is that designated port is judged to the purpose output port of this message.
The FFP function is a basic function of exchange chip, matched rule can be set the message that receives is mated, and the message that meets matched rule is handled according to the corresponding processing strategy.
Can on exchange chip, create the FFP list item in advance in the present embodiment, and with the matched rule in this FFP list item, whether the purpose output port that is set to matching message is consistent with designated port; Accordingly, this step confirms according to the matched rule in this FFP list item of creating on the exchange chip whether the purpose output port of this message is designated port.
In the embodiment of the invention, be set to designated port for which port in the exchange chip, can be according to actual needs be provided with the characteristic of each port, for example, peak flow values that can port surpasses the port of setting flow value and is set to designated port.
Concrete, still be example with Fig. 1, wherein port one-port 4 is for being connected to the port of user network; Its peak flow values is 10G, and port 5 is for being connected to the port of data center network, and its peak flow values is 40G; The data traffic that need transmit owing to the port that is connected to data center network is bigger; Be easy to generate burst flow, therefore port 5 can be set be designated port, port one-port 4 is set is non-designated port.
Step S304, send this message to the TM chip that links to each other with exchange chip; The TM chip is used for linking to each other with exchange chip; Exchange chip is carried out hardware cache formation expansion, and the purpose output port that promptly need transmit exchange chip is that the message of designated port carries out buffer memory.
In this step, can send this message to the TM chip that links to each other with exchange chip through the FFP function of exchange chip.
Can on exchange chip, create the FFP list item in advance in the present embodiment; And with the matched rule in this FFP list item; Whether the purpose output port that is set to matching message is consistent with designated port; And with in this FFP performance with this matched rule corresponding processing strategy, the interface bitmap that the purpose output port bitmap of this message is revised as the interface between exchange chip and the TM chip is set; Accordingly; This step according in this FFP list item with this matched rule corresponding processing strategy; The purpose output port bitmap of this message is revised as the interface bitmap of the interface between exchange chip and the TM chip, obtains amended purpose output port bitmap, thereby based on this amended purpose output port bitmap; Through the interface between exchange chip and the TM chip, send this message to the TM chip.
For under the situation of the purpose output port of not revising this message; This message is transmitted to the TM chip; Thereby when making this message that the follow-up TM of receiving chip returns; Can transmit this message through this purpose output port fast, this step specifically can be used and adopt following mode to send this message to the TM chip:
Port-mark based on the purpose output port of this message; This message is encapsulated; Obtain encapsulated message; Carry the port-mark of this message and this purpose output port in the encapsulated message, specifically can in the heading of encapsulated message, carry the port-mark of this purpose output port, in the message body of encapsulated message, carry this message.
After step S305, TM chip receive this message, this message is carried out buffer memory, and this message is returned to exchange chip through queue scheduling.
What receive when the TM chip is when carrying the encapsulated message of this message, then specifically is that this encapsulated message is carried out buffer memory, and through queue scheduling this encapsulated message is returned to exchange chip.
Step S306, exchange chip receive this message that returns behind the TM chip buffer memory, and transmit this message through this purpose output port.
What return when the TM chip is that this step is specific as follows when carrying the encapsulated message of this message:
Exchange chip obtains the port-mark of this purpose output port that carries in this encapsulated message, and this encapsulated message is carried out decapsulation, obtains this message;
Through transmitting this message that decapsulation obtains with this port-mark corresponding port of obtaining.
Step S307, when the purpose output port of confirming this message is not the designated port of this exchange chip; Represent that this message need not pass through the caching process of TM chip; So cancellation is through the caching process of TM chip to this message, and this purpose output port that directly passes through to confirm is transmitted this message.
In the message forwarding method above-mentioned shown in Figure 3 that provides in the present embodiment 1; Can handle according to flow process shown in Figure 3 to unicast message and broadcasting packet; Also can only handle according to flow process shown in Figure 3 to unicast message; And, then can pass through the caching process of TM chip, and transmit this broadcasting packet through this purpose output port to this broadcasting packet for broadcasting packet.
Message forwarding method in the exchange chip that the employing embodiment of the invention 1 provides, exchange chip no longer is all to send to the TM chip for the message that receives; Carry out caching process by the TM chip, but be the message of designated port selectively, just via transmitting again behind the TM chip buffer memory the purpose output port; And for the message of purpose output port non-designated port, then not via TM chip buffer memory, but directly transmit through the purpose output port; Thereby reduced quantity through TM chip buffer memory message; And then improved the message forward efficiency, and, requirement can be reduced to the hardware cache capacity of queue of TM chip.
Embodiment 2:
Based on same inventive concept, the message forwarding method in the exchange chip that provides according to the above embodiment of the present invention, correspondingly, the embodiment of the invention 2 also provides a kind of exchange chip, and its structural representation is as shown in Figure 4, specifically comprises:
Port is confirmed unit 401, is used for transmitting rule according to preset message the purpose output port of definite message that receives from each port of this exchange chip;
First transmitting element 402 is used for when said purpose output port is the designated port of this exchange chip, sends said message to the traffic management TM chip that links to each other with this exchange chip;
Receiving element 403 is used to receive the said message that behind said TM chip buffer memory, returns;
Second transmitting element 404 is used for transmitting said message through said purpose output port.
Preferable; Second transmitting element 404; Also be used for after port is confirmed the purpose output port of unit 401 according to the definite message that receives of preset forwarding rule; When said purpose output port is not the designated port of this exchange chip, cancels through the caching process of said TM chip, and transmit said message through said purpose output port to said message.
Preferable, above-mentioned exchange chip also comprises:
First transmitting element 402; Specifically be used for according to said FFP list item and said matched rule corresponding processing strategy; The purpose output port bitmap of said message is revised as the interface bitmap of the interface between this exchange chip and the said TM chip, obtains amended purpose output port bitmap; And based on said amended purpose output port bitmap, the interface through between this exchange chip and the said TM chip sends said message to said TM chip.
Preferable, first transmitting element 402 specifically is used for the port-mark based on said purpose output port, and said message is encapsulated, and obtains encapsulated message, carries the said port-mark of said message and said purpose output port in the said encapsulated message;
Receiving element 403 specifically is used to receive the said encapsulated message that behind said TM chip buffer memory, returns;
Second transmitting element 404 specifically is used for obtaining the said port-mark of the said purpose output port that said encapsulated message carries, and said encapsulated message is carried out decapsulation, obtains said message; And through transmitting said message with the said port-mark corresponding port of obtaining.
Preferable, above-mentioned exchange chip also comprises:
Message is confirmed unit 406, is used at first transmitting element 402 before the TM chip that links to each other with this exchange chip sends said message, confirms that said message is a unicast message;
Second transmitting element 403 also is used for when said message is broadcasting packet, cancels through the caching process of said TM chip to said message, and transmits said message through said purpose output port.
Based on same inventive concept, the message forwarding method in the exchange chip that provides according to the above embodiment of the present invention, correspondingly; The embodiment of the invention 2 also provides a kind of network equipment; Its structural representation is as shown in Figure 5, specifically comprises: exchange chip 501 and TM chip 502, wherein:
In sum, the scheme that the embodiment of the invention provides comprises: exchange chip is according to the preset rule of transmitting, the purpose output port of definite message that receives from each port of self; And when this purpose output port is the designated port of this exchange chip, send this message to the TM chip that links to each other with this exchange chip; And receive this message behind this TM chip buffer memory, return; And through this this message of purpose output port forwarding.The scheme that adopts the embodiment of the invention to provide has improved the message forward efficiency when based on the TM chip exchange chip being carried out hardware cache formation expansion, and, reduced requirement to the hardware cache capacity of queue of TM chip.
Obviously, those skilled in the art can carry out various changes and modification to the present invention and not break away from the spirit and scope of the present invention.Like this, belong within the scope of claim of the present invention and equivalent technologies thereof if of the present invention these are revised with modification, then the present invention also is intended to comprise these changes and modification interior.
Claims (11)
1. the message forwarding method in the exchange chip is characterized in that, comprising:
Exchange chip is transmitted rule according to preset message, the purpose output port of definite message that receives from each port of self;
When said purpose output port is the designated port of said exchange chip, send said message to the traffic management TM chip that links to each other with said exchange chip;
The said message that reception is returned behind said TM chip buffer memory;
Transmit said message through said purpose output port.
2. the method for claim 1 is characterized in that, after the purpose output port of the message of confirming according to preset forwarding rule to receive, also comprises:
When said purpose output port is not the designated port of said exchange chip, cancels through the caching process of said TM chip, and transmit said message through said purpose output port to said message.
3. the method for claim 1 is characterized in that, when said purpose output port is the designated port of said exchange chip, sends said message to the traffic management TM chip that links to each other with said exchange chip, specifically comprises:
According to the matched rule in the quick filtration treatment FFP list item of creating on the said exchange chip, confirm that said purpose output port is the designated port of said exchange chip;
According in the said FFP list item with said matched rule corresponding processing strategy, the purpose output port bitmap of said message is revised as the interface bitmap of the interface between said exchange chip and the said TM chip, obtain amended purpose output port bitmap;
Based on said amended purpose output port bitmap, the interface through between said exchange chip and the said TM chip sends said message to said TM chip.
4. the method for claim 1 is characterized in that, sends said message to the traffic management TM chip that links to each other with said exchange chip, specifically comprises:
Based on the port-mark of said purpose output port, said message is encapsulated, obtain encapsulated message, carry the said port-mark of said message and said purpose output port in the said encapsulated message;
The said message that reception is returned behind said TM chip buffer memory is specially:
The said encapsulated message that reception is returned behind said TM chip buffer memory;
Transmit said message through said purpose output port, specifically comprise:
Obtain the said port-mark of the said purpose output port that carries in the said encapsulated message, and said encapsulated message is carried out decapsulation, obtain said message;
Through transmitting said message with the said port-mark corresponding port of obtaining.
5. the method for claim 1 is characterized in that, before sending said message to the TM chip that links to each other with said exchange chip, also comprises:
Confirm that said message is a unicast message;
When said message is broadcasting packet, cancels through the caching process of said TM chip, and transmit said message through said purpose output port to said message.
6. an exchange chip is characterized in that, comprising:
Port is confirmed the unit, is used for transmitting rule according to preset message the purpose output port of definite message that receives from each port of this exchange chip;
First transmitting element is used for when said purpose output port is the designated port of this exchange chip, sends said message to the traffic management TM chip that links to each other with this exchange chip;
Receiving element is used to receive the said message that behind said TM chip buffer memory, returns;
Second transmitting element is used for transmitting said message through said purpose output port.
7. exchange chip as claimed in claim 6; It is characterized in that; Said second transmitting element also is used for after said port is confirmed the purpose output port of unit according to the definite message that receives of preset forwarding rule, when said purpose output port is not the designated port of this exchange chip; Cancel through the caching process of said TM chip, and transmit said message through said purpose output port to said message.
8. exchange chip as claimed in claim 6 is characterized in that, also comprises:
Matching unit is used for the matched rule according to the quick filtration treatment FFP list item of creating on this exchange chip, confirms that said purpose output port is the designated port of this exchange chip;
Said first transmitting element; Specifically be used for according to said FFP list item and said matched rule corresponding processing strategy; The purpose output port bitmap of said message is revised as the interface bitmap of the interface between this exchange chip and the said TM chip, obtains amended purpose output port bitmap; And based on said amended purpose output port bitmap, the interface through between this exchange chip and the said TM chip sends said message to said TM chip.
9. exchange chip as claimed in claim 6; It is characterized in that; Said first transmitting element specifically is used for the port-mark based on said purpose output port, and said message is encapsulated; Obtain encapsulated message, carry the said port-mark of said message and said purpose output port in the said encapsulated message;
Said receiving element specifically is used to receive the said encapsulated message that behind said TM chip buffer memory, returns;
Said second transmitting element specifically is used for obtaining the said port-mark of the said purpose output port that said encapsulated message carries, and said encapsulated message is carried out decapsulation, obtains said message; And through transmitting said message with the said port-mark corresponding port of obtaining.
10. exchange chip as claimed in claim 6 is characterized in that, also comprises:
Message is confirmed the unit, is used at said first transmitting element before the TM chip that links to each other with this exchange chip sends said message, confirms that said message is a unicast message;
Said second transmitting element also is used for when said message is broadcasting packet, cancels through the caching process of said TM chip to said message, and transmits said message through said purpose output port.
11. a network equipment is characterized in that, comprising: like arbitrary said exchange chip of claim 6-10 and said TM chip.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210018095.0A CN102546422B (en) | 2012-01-19 | 2012-01-19 | Message forwarding method in exchange chip, exchange chip and network device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210018095.0A CN102546422B (en) | 2012-01-19 | 2012-01-19 | Message forwarding method in exchange chip, exchange chip and network device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103761983A (en) * | 2014-01-09 | 2014-04-30 | 南京迅云网络科技有限公司 | Method and system for achieving real-time recorded broadcasting in education system |
| CN105429882A (en) * | 2015-10-21 | 2016-03-23 | 盛科网络（苏州）有限公司 | Message editing realization method and apparatus based on conventional switching chip search mode |
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Cited By (2)
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| CN103761983A (en) * | 2014-01-09 | 2014-04-30 | 南京迅云网络科技有限公司 | Method and system for achieving real-time recorded broadcasting in education system |
| CN105429882A (en) * | 2015-10-21 | 2016-03-23 | 盛科网络（苏州）有限公司 | Message editing realization method and apparatus based on conventional switching chip search mode |
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Address after: Cangshan District of Fuzhou City, Fujian province 350002 Jinshan Road No. 618 Garden State Industrial Park 19 floor Patentee after: RUIJIE NETWORKS Co.,Ltd. Address before: Cangshan District of Fuzhou City, Fujian province 350002 Jinshan Road No. 618 Garden State Industrial Park 19 floor Patentee before: Beijing Star-Net Ruijie Networks Co.,Ltd. |