CN101232510A - Method and system for implementing multi-network port device multicast - Google Patents

Abstract

The invention relates to a method for realizing the multicast of a multi-network-port device, and includes the following steps: step 1: mapping one or a plurality of multicast address to a port in a multi-network-port device to prevent the multicast objective machine from receiving the same messages; step 2: when the corresponding state of the port changes, the one or a plurality of multicast address will be updated to a corresponding port for avoiding the failure of sending GMP messages for the corresponding state change of the port. The method uses a fixed algorithm to realize the correspondence between a multi-cast address and a valid physical port, so that the IGMP report message of one multi-cast address can always be sent from one physical port.

Description

A kind of implementation method of multi-network port device multicast and system

Technical field

The present invention relates to multicast, relate in particular to a kind of implementation method and system of multi-network port device multicast.

Background technology

For general server or client, two or more if it exists to external port, and when wishing that these ports all add same multicast group simultaneously, networking diagram is as shown in Figure 1.Go up at L2 switch (Switch) and open IGMP Snooping function this moment, will cause on the switch two ports all can listen to IGMP (IGMP) report (Report) message of same multicast group, and the multicast service message that send from multicast source this moment just have identical two parts and is sent to same multicast purpose machine.

At such networking, common way is two ports on the same equipment to be carried out polymerization by third party's agreement, thereby avoids multicast purpose machine to receive duplicate message.

Shortcoming in this processing is to realize by other agreements (as port trunking etc.), but not all equipment all is the such agreement of the similar port trunking of support, in the time can't carrying out port trunking, multicast purpose machine will be received the message of double (or many parts), can only accept or reject by upper-layer protocol, have a strong impact on handling property, can't satisfy the demand under the specified conditions.In addition, require than higher occasion for real-time, the such agreement of port trunking also can't meet specific requirement.

Especially for communication apparatus, as shown in Figure 2, normally form by interface card, exchange ply-yarn drill, protocol processes ply-yarn drill and the backboard that connects these ply-yarn drills.The exchange ply-yarn drill is the switching center of two layers of Ethernet, and function is equivalent to a L2 Switch; Interface card mainly is responsible for receiving the request of external user, and the protocol processes ply-yarn drill of being given to then in the network element is handled; The protocol processes ply-yarn drill has multiple, handles dissimilar service messages respectively, as tone decoding, real-time Data Transmission or the like.The part of interface card response external user request is referred to as the external user face, is given to the part that the protocol processes ply-yarn drill in the network element is handled by interface card, is called the internal user face.

In common networking shown in Figure 3, for the external user face, because the external network of its connection is standard ethernet, so suggestion adopts port aggregation protocol to carry out interconnected; For the internal user face,,, influence performance if realizing multicast scheme just need suitably handle the message that repeats owing to do not support port aggregation protocol.

Summary of the invention

In order to solve above-mentioned technical problem, a kind of implementation method and system of multi-network port device multicast are provided, its purpose is, carry out under the situation of port trunking not needing, can finish good load sharing, when port status changes, can very fast switching, the minimum business that influences.

The invention provides a kind of implementation method of multi-network port device multicast, comprising:

Step 1 is mapped to a port numbers with one or more multicast address on multi-network mouth device, be used to avoid multicast purpose machine to receive identical message;

Step 2 when described port numbers corresponding port state changes, is updated to corresponding ports number with described one or more multicast address, is used to avoid cause sending the IGMP message because of described port numbers corresponding port state changes.

In the step 1, the mapping relations table of multicast address and port numbers is set also.

In the step 1, the multicast ip address that multicast address adds for the protocol processes ply-yarn drill, described being mapped as according to multicast ip address and port status calculated port numbers.

In the step 1, port numbers is the port numbers of multicast address divided by the available port of the remainder correspondence of the maximum port number of protocol processes ply-yarn drill.

Step 1 also comprises:

Step 51 when the message of multicast group to be added such as receiving, adds multicast group with this message, and checks whether this multicast group exists, if exist, then execution in step 53, otherwise execution in step 52;

Step 52 is calculated port numbers according to multicast address, and with the mapping relations adding multicast address of this multicast address and port numbers and the mapping relations table of port numbers, execution in step 53;

Step 53 is provided with the IGMP type of message for report, joins the message transmit queue;

Step 54 is checked transmit queue, is ready for sending the IGMP message.

Step 1 also comprises:

Step 61 receives and waits for when leaving the message of multicast group, and checks whether this multicast group exists, if exist, then execution in step 62, otherwise do not carry out any processing;

Step 62 is according to the mapping relations of multicast group address deletion multicast address and port numbers;

Step 63 is provided with the IGMP type of message for leaving, and joins the message transmit queue;

Step 64 is checked transmit queue, is ready for sending the IGMP message.

Port status comprises that port can be with unavailable with port.

In the step 2, when port status is port when unavailable, the port numbers of selecting a port in all the other available ports is as corresponding ports number.

In the step 2, all the other available ports are arranged by the mode of poll.

The invention provides the realization system of multi-network port device multicast, comprising:

Multicast address and port numbers mapping block are used on multi-network mouth device one or more multicast address being mapped to a port numbers, receive identical message to avoid multicast purpose machine;

Multicast address and port numbers map updating module, be used for when described port numbers corresponding port state changes, described one or more multicast address are updated to corresponding ports number, cause to send the IGMP message because of described port numbers corresponding port state changes avoiding.

Multi-network port device multicast implementation method of the present invention adopts fixing algorithm, has realized the correspondence of multicast address and effective physical port, makes the IGMP Report message of some multicast address send from a physical port all the time; When having a plurality of multicast address, can realize good load sharing again; The variation of port status is minimum to service impact simultaneously.

Description of drawings

Fig. 1 is a common networking schematic diagram in the prior art;

Fig. 2 is that the device structure schematic diagram is handled in communication in the prior art;

Fig. 3 is that the equipment network schematic diagram is handled in communication in the prior art;

Fig. 4 is a multi-network port device multicast implementation method schematic flow sheet of the present invention;

Fig. 5 is that multi-network port device multicast of the present invention is realized system construction drawing.

Embodiment

Among the present invention, setting up, safeguard the mapping table of a multicast group address and port numbers on multi-network mouth device, can be the corresponding port numbers of the corresponding port numbers of a multicast group address or a plurality of multicast group address; Wherein, multicast group address is exactly the multicast ip address that a series of these protocol processes ply-yarn drills add; And port numbers is according to different multicast ip address and the port numbers calculated according to certain method in conjunction with the present state of port, these port numbers directly correspond to the physical port number of protocol processes ply-yarn drill, select to use when multicast group sends IGMP Report message outward.

In the above-mentioned multi-network port device multicast implementation method, when the port status of described protocol processes ply-yarn drill changed, correspondence was carried out suitable renewal with the clauses and subclauses of the port of this variation in the meeting his-and-hers watches, in conjunction with multicast address, calculates and change into an available port numbers.

Multi-network port device multicast implementation method flow chart of the present invention such as Fig. 4 specifically comprise following several steps:

Step 401, initialization multicast address and port mapping table are as the distribution of internal memory and initialization etc.;

Step 402 enters message processing function, waits for as the adding multicast group, leaves the message of multicast group.Add multicast group message when receiving, then change step 403 over to; Leave multicast group message when receiving, then change step 406 over to;

Step 403 is tabled look-up according to multicast address, sees in the list item whether had same multicast group; If exist, then change step 405 over to; If there is no, then change step 404 over to;

Step 404 is calculated port numbers according to multicast address; Write in multicast address/port mapping table together with multicast address then;

The method of calculating port numbers in the above-mentioned steps is:

The remainder of the maximum port number of port numbers=multicast address/protocol processes ply-yarn drill;

Step 405, it is Report that the IGMP type of message is set, and joins in the message transmit queue;

Step 406, step 403 above the congenerous; If exist, then change step 407; If there is no, then do not handle;

Step 407 is searched multicast address/port mapping relation table according to multicast address, and the clauses and subclauses of finding are deleted;

Step 408 is provided with the IGMP type of message for leaving (Leave), joins in the message transmit queue;

Step 409 is checked transmit queue, if message is arranged, then taking-up multicast address and outbound port one by one prepared to send;

Step 410 for the multicast address of needs transmission IGMP message, sees whether corresponding port is effective in the port mapping table; If effectively, then change step 412; If invalid, then change step 411;

Step 411 selects an effective physical port number to replace invalid port numbers in the list item;

Select the method for live end slogan to be in the above-mentioned steps:

The mode of live end slogan according to poll is mapped in the port array the maximum port number of the corresponding protocol processes ply-yarn drill of maximum clauses and subclauses of this array;

Suppose that the present maximum port number of protocol processes ply-yarn drill is 4, then can define a port array is aucPortIndex[4];

If this moment, available port number was 4, port numbering is respectively 1,2,3,4; Then correspond in the array value for 1,2,3,4};

If this moment, available port number was 1 (if available port numbers is 2); Then correspond in the array value for 2,2,2,2};

If this moment, available port number was 2 (if available port numbers is 1,4); Then correspond in the array value for 1,4,1,4};

If this moment, available port number was 3 (if available port numbers is 1,2,3); Then correspond in the array value for 1,2,3,1};

The principle of available port mapping is a poll, but requires to be evenly distributed in the array as far as possible.Therefore the system of selection of live end slogan is as follows:

The maximum port number of live end slogan=aucPortIndex[multicast address MOD protocol processes ply-yarn drill];

Step 412 sends the IGMP message from effective port.

When the ports physical state is changed to DOWN by UP, check whether port numbers corresponding this port is arranged in multicast address/port mapping relation table, if having, then forward top step 405 to, send Report message to the outside, upgrade changing port.

By some top steps, in the time of can guaranteeing multi-network mouth device and L2 Switch butt joint, networking as shown in Figure 3 can not cause the protocol processes ply-yarn drill to receive the multicast message of repetition.And when some or several port statuss changed, the port of finishing that can be very fast switched, and reduces professional packet loss.

In order to realize the implementation method of multi-network port device multicast provided by the invention, the invention provides a kind of realization system 500 of multi-network port device multicast, as shown in Figure 5, comprising:

Multicast address and port numbers mapping block 501 are used on multi-network mouth device one or more multicast address being mapped to a port numbers, receive identical message to avoid multicast purpose machine;

Multicast address and port numbers map updating module 502, be used for when described port numbers corresponding port state changes, described one or more multicast address are updated to corresponding ports number, cause to send the IGMP message because of described port numbers corresponding port state changes avoiding.

Those skilled in the art can also carry out various modifications to above content under the condition that does not break away from the definite the spirit and scope of the present invention of claims.Therefore scope of the present invention is not limited in above explanation, but determine by the scope of claims.

Claims (10)

1. the implementation method of a multi-network port device multicast is characterized in that, comprising:

Step 1 is mapped to a port numbers with one or more multicast address on multi-network mouth device, be used to avoid multicast purpose machine to receive identical message;

Step 2 when described port numbers corresponding port state changes, is updated to corresponding ports number with described one or more multicast address, is used to avoid cause sending the IGMP message because of described port numbers corresponding port state changes.

2. the implementation method of multi-network port device multicast as claimed in claim 1 is characterized in that, in the step 1, the mapping relations table of multicast address and port numbers is set also.

3. the implementation method of multi-network port device multicast as claimed in claim 2 is characterized in that, in the step 1, and the multicast ip address that multicast address adds for the protocol processes ply-yarn drill, described being mapped as according to multicast ip address and port status calculated port numbers.

4. the implementation method of multi-network port device multicast as claimed in claim 3 is characterized in that, in the step 1, port numbers is the port numbers of multicast address divided by the available port of the remainder correspondence of the maximum port number of protocol processes ply-yarn drill.

5. the implementation method of multi-network port device multicast as claimed in claim 3 is characterized in that, step 1 also comprises:

Step 51 when the message of multicast group to be added such as receiving, adds multicast group with this message, and checks whether this multicast group exists, if exist, then execution in step 53, otherwise execution in step 52;

Step 52 is calculated port numbers according to multicast address, and with the mapping relations adding multicast address of this multicast address and port numbers and the mapping relations table of port numbers, execution in step 53;

Step 53 is provided with the IGMP type of message for report, joins the message transmit queue;

Step 54 is checked transmit queue, is ready for sending the IGMP message.

6. the implementation method of multi-network port device multicast as claimed in claim 3 is characterized in that, step 1 also comprises:

Step 61 receives and waits for when leaving the message of multicast group, and checks whether this multicast group exists, if exist, then execution in step 62, otherwise do not carry out any processing;

Step 62 is according to the mapping relations of multicast group address deletion multicast address and port numbers;

Step 63 is provided with the IGMP type of message for leaving, and joins the message transmit queue;

Step 64 is checked transmit queue, is ready for sending the IGMP message.

7. the implementation method of multi-network port device multicast as claimed in claim 4 is characterized in that, port status comprises that port can be with unavailable with port.

8. the implementation method of multi-network port device multicast as claimed in claim 7 is characterized in that, in the step 2, when port status is port when unavailable, the port numbers of selecting a port in all the other available ports is as corresponding ports number.

9. the implementation method of multi-network port device multicast as claimed in claim 8 is characterized in that, in the step 2, all the other available ports are arranged by the mode of poll.

10. a system that is used for as the implementation method of any described multi-network port device multicast of claim 1-9 is characterized in that, comprising:

Multicast address and port numbers mapping block are used on multi-network mouth device one or more multicast address being mapped to a port numbers, receive identical message to avoid multicast purpose machine;

Multicast address and port numbers map updating module, be used for when described port numbers corresponding port state changes, described one or more multicast address are updated to corresponding ports number, cause to send the IGMP message because of described port numbers corresponding port state changes avoiding.

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