CN100505697C - Method and apparatus retransmitting two-layer message in elastic block ring - Google Patents
Method and apparatus retransmitting two-layer message in elastic block ring Download PDFInfo
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- CN100505697C CN100505697C CN200610099455.9A CN200610099455A CN100505697C CN 100505697 C CN100505697 C CN 100505697C CN 200610099455 A CN200610099455 A CN 200610099455A CN 100505697 C CN100505697 C CN 100505697C
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Abstract
A method for retransmitting two-layer message in elastic packet ring adds media access control MAC address of current lower ring station in VLAN in destination address of RPR frame head according to VLAN of said message when RPR frame head of two-layer message entering elastic packet ring RPR is packet and repackaged two-layer message is transmitted on PRP then.
Description
Technical field
The present invention relates to Resilient Packet Ring (RPR, Resilient Packet Ring) technology, relate in particular to a kind of method and device of in RPR, transmitting two layer message.
Background technology
RPR is the agreement of a kind of novel medium access control (MAC, MediaAccess Control) layer of IEEE 802.17 working groups definition.RPR adopts the frame format of similar Ethernet, and last each website of RPR has unique MAC Address respectively, can carry out two layers of exchange fast based on MAC Address.When a website carried out message interaction by RPR and other website, RPR adopted the mode of broadcasting that the two layer message from last link point is transmitted, and pass-through mode as shown in Figure 1.In Fig. 1, device A 1 is the plug-in device of website A, and equipment D1 is the plug-in device of website D.Pass through RPR when equipment D1 sends two layer message when device A 1, its process specifically comprises:
The two layer message that device A 1 sends is from last link point, be website A, enter RPR, website A will be this message encapsulation RPR frame head, and the MAC Address of ring station point A in the source address (sa) of RPR frame head, adding, add broadcast address in the destination address (DA) of RPR frame head, this two layer message will transmit with broadcast mode on the RPR ring.Whenever this two layer message during through a website, all there is the duplicate of a this message to leave RPR from this website, original two layer message continues to be forwarded to next website.From following link point, i.e. website D, the duplicate that leaves RPR is received by equipment D1, and the duplicate that leaves RPR from other website will be stripped from.Described two layer message is broadcasted on RPR, and when getting back to website A once more, this message just can be peeled off by website A.
As can be seen, RPR transmits the bandwidth that two layer message will be wasted the RPR loop by broadcast mode, reduces the utilance of loop bandwidth.
Summary of the invention
In view of this, the invention provides a kind of method and device of in RPR, transmitting two layer message, the two layer message of transmitting through RPR is transmitted on RPR with mode of unicast, thereby reduce the waste of RPR loop bandwidth, improve the utilance of loop bandwidth.
The present invention includes:
A kind of method of transmitting two layer message in Resilient Packet Ring comprises:
When encapsulating the RPR frame head for the two layer message that enters RPR, according to the VLAN under this message, the medium access control MAC Address of the current down ring station point of this VLAN is added in the destination address of RPR frame head into, the two layer message after encapsulating is again sent on RPR.
Wherein, when being the following ring station point of described VLAN configuration during, according to the current time ring station point of the described VLAN of following arrangements of steps more than one:
Respectively in the priority of described each time ring station point this website of configuration in described VLAN, name a person for a particular job self precedence information of each time ring station is broadcasted on RPR;
The following ring station point that priority is the highest is set to the current ring station point down of described VLAN.
Wherein, further comprise:
When the highest following ring station of described VLAN medium priority during o'clock more than, wherein the following ring station point of MAC Address maximum is set to the current ring station point down of described VLAN.
Wherein, further comprise:
If the priority of each of described VLAN time ring station point changes, the priority of each time ring station point among this VLAN relatively again then, the following ring station point that priority is the highest is set to the current ring station point down of described VLAN.
Wherein, the priority of each of described VLAN time ring station point changes, and comprising: current down ring station point breaks down, or during with the link occurs fault of the current connection of ring station spot correlation down, reduces the current priority of ring station point down;
Other down ring station point failure recover, or with other down during the link failure recovery of ring station spot correlation connection, improve the priority of this time ring station point.
Wherein, manually be described VLAN configuration ring station point down.
A kind of device of transmitting two layer message in Resilient Packet Ring comprises:
Message is transformed the unit, is used to the two layer message encapsulation RPR frame head that enters RPR, and according to the VLAN under this message, the current MAC Address of ring station point down of this VLAN is added in the destination address of RPR frame head into;
Packet sending unit, the two layer message that is used for transforming by message after the unit encapsulates again sends on RPR.
Wherein, also comprise:
Following ring station point dispensing unit is used to VLAN configuration ring station point down;
Current down ring station point is provided with the unit, is used to be provided with the current ring station point down of VLAN, and when VLAN had a following ring station point, this time ring station point was set to the current ring station point that descends of this VLAN; When VLAN had a plurality of times ring station points, the following ring station point that its medium priority is the highest was set to the current ring station point down of this VLAN.
Wherein, described current down ring station point is provided with the unit and also is used for when the highest following ring station of VLAN medium priority during o'clock more than, and wherein the following ring station point of MAC Address maximum is set to the current time ring station point of this VLAN.
Wherein, also comprise:
Precedence information obtains the unit, is used for obtaining the precedence information of each time of VLAN ring station point, notifies current ring station point down that the unit is provided with VLAN according to the precedence information of each time ring station point current ring station point down is set.
In the present invention, when entering the two layer message encapsulation RPR frame head of RPR,, the current MAC Address of ring station point down of this VLAN is added in the destination address of RPR frame head into according to the VLAN under this message, then, the two layer message after encapsulating is again sent on RPR.Thereby can make this two layer message reduce the waste of RPR loop bandwidth, improve the utilance of loop bandwidth with the mode of unicast transmission on RPR.
Description of drawings
Fig. 1 is the schematic diagram that two layer message is transmitted in RPR broadcasting;
Fig. 2 a is the flow chart of the inventive method embodiment 1;
Fig. 2 b is the schematic diagram of the two layer message of RPR forwarding in the present invention;
Fig. 3 is to be the schematic diagram of two following ring station points of a VLAN configuration among the present invention;
Fig. 4 is the flow chart of the inventive method embodiment 2;
Fig. 5 a is the form that carries the ATD message of precedence information;
Fig. 5 b is the schematic diagram that carries the ATD message of precedence information;
Fig. 5 c is the schematic diagram that carries the ATD message of precedence information;
Fig. 6 is the flow chart of the inventive method embodiment 3;
Fig. 7 is the schematic diagram of apparatus of the present invention embodiment.
Embodiment
Core concept of the present invention is: be ring station point under the VLAN configuration, thereby can separate the two layer message that enters RPR according to VLAN.When two layer message enters RPR, to be this two layer message encapsulation RPR frame head, according to the VLAN under this message, the corresponding MAC Address of ring station point down is added in the destination address of RPR frame head, thereby this two layer message can be transmitted on RPR with mode of unicast, reduce the waste of RPR loop bandwidth, improve the utilance of loop bandwidth.
Below, 1 pair of method of the present invention is done further and is specified in conjunction with the embodiments.
Referring to Fig. 2 a, a kind of method of transmitting two layer message in RPR comprises:
Step 201:
By manual configuration, for each VLAN disposes a following ring station point respectively, so just can separate according to VLAN by the two layer message flow that VLAN will enter RPR, in conjunction with the RPR structure of Fig. 1, its detailed process comprises:
With website A is that last ring station point is an example, if the VLAN that is associated with website A has 4, is respectively: VLAN 10, VLAN 20, VLAN 30 and VLAN 40 can be configured to website B the following ring station point of VLAN 10; Website C is configured to the following ring station point of VLAN 20; Website D is configured to the following ring station point of VLAN 30; Website E is configured to the following ring station point of VLAN 40.
Step 202:
When the two layer message of certain VLAN enters RPR, be this message encapsulation RPR frame head, and the MAC Address of in the destination address of RPR frame head, adding corresponding following ring station point, promptly in the destination address domain of RPR growth data frame, add the corresponding MAC Address of ring station point down, the message that will encapsulate again sends on RPR then, in conjunction with the RPR structure of Fig. 1, its detailed process comprises:
When the two layer message of VLAN 30 when website A enters RPR, website A is for this message encapsulation RPR frame head the time, the MAC Address of website A will be added in the source address field of RPR growth data frame, add the MAC Address of website D in the destination address domain of RPR growth data frame, the message that will encapsulate again sends on RPR then.
Again the two layer message after the encapsulation will when this message arrives website D, will leave RPR, and be peeled off by website D with the mode of unicast transmission on RPR.
In like manner, when two layers of Ethernet message of VLAN 10 when website A enters RPR, website A will add the MAC Address of website B in the destination address domain of RPR growth data frame for this message encapsulation RPR frame head the time; When two layers of Ethernet message of VLAN 20 when website A enters RPR, website A will add the MAC Address of website C in the destination address domain of RPR growth data frame for this message encapsulation RPR frame head the time; When two layers of Ethernet message of VLAN 40 when website A enters RPR, website A will add the MAC Address of website E in the destination address domain of RPR growth data frame for this message encapsulation RPR frame head the time.
After adopting said method, the mode of RPR forwarding two layer message will be shown in Fig. 2 b.In Fig. 2 b, the two layer message that device A 1 sends is from last link point, be website A, enter RPR, website A will be this message encapsulation RPR frame head, and the MAC Address of ring station point A in the source address of RPR frame head, adding, the MAC Address of ring station point, the i.e. MAC Address of website D under the interpolation in the destination address of RPR frame head.This two layer message will be sent to website D, and leave RPR from website D, and website D peels off this two layer message simultaneously.The two layer message that leaves RPR is received by equipment D1.
In embodiment 1, be last ring station point with website A, when being last ring station point with other website, method of the present invention is suitable equally, no longer repeats here to illustrate.
Can reduce the waste of RPR loop bandwidth by said method, improve the utilance of loop bandwidth, but, in said method, VLAN has only a following ring station point, when this time ring station point breaks down or during with the link occurs fault of this time ring station spot correlation connection, in the time of will causing two layer message to leave RPR, finally can cause service traffics to be interrupted.
For this reason, the present invention also further provides a kind of method of transmitting two layer message in RPR, to address the above problem.The core concept of this method is: for each VLAN disposes a plurality of following ring station points respectively, and the current following ring station point of each VLAN is set.When two layer message enters RPR, it is sent to the current ring station point down of this VLAN with mode of unicast according to the VLAN under this two layer message.If the following ring station point among this VLAN changes, for example: current down ring station point break down during with the link occurs fault of the current connection of ring station spot correlation down or other down the ring station point failure recover or with other down during the link failure recovery of ring station spot correlation connection, to reset the current ring station point down of this VLAN, and transmit the two layer message of this VLAN by new current ring station point down.
Below, RPR structure chart and embodiment 2 in conjunction with Fig. 1 describe this method.
Referring to Fig. 4, a kind of method of transmitting two layer message in RPR comprises:
Step 401:
By manual configuration, be a plurality of ring station points down of VLAN configuration, and the described a plurality of default priority of ring station point in this VLAN down be set that its detailed process comprises:
RPR structure chart in conjunction with Fig. 1, above ring station point is that website A is an example, and hypothesis VLAN 10 is the VLAN of website A, can be 2 following ring station points of VLAN 10 configurations then at website A, 2 following ring station points of hypothesis configuration here are website D and website E, and the default priority of website D in VLAN 10 is set is 3, and it is 2 that the default priority of website E in VLAN 10 is set, and also website D and website E can be set to 3 by the default priority in VLAN 10.
For the schematic diagram of two following ring station points of VLAN configuration as shown in Figure 3, wherein, T1 is the link between website A and the website D, T2 is the link between website A and the website E.Device A 1 is to encircle external equipment with the RPR that website A links to each other with website D respectively with equipment D1; Link LD is the link between website D and the ring external equipment D1.
Because a following ring station point may be subordinated to a plurality of VLAN, so the default priority of this website should be set at described a plurality of VLAN, for example: in conjunction with Fig. 1, when website A and website B are when going up ring station point, website A can be configured to website D and website E the following ring station point of VLAN 10, and website B can be configured to website D the following ring station point of VLAN 20, website E is configured to the following ring station point of VLAN30, when then default priority being set, all to be provided with the default priority of these 2 websites in different VLAN for website D and website E.When website D was the following ring station point of VLAN 10, the default priority that website D can be set was 3, and when website D was the following ring station point of VLAN 20, the default priority that website D can be set was 1; When website E was the following ring station point of VLAN 10, the default priority that website E can be set was 2, and when website E was the following ring station point of VLAN 30, the default priority that website E can be set was 3.
Step 402:
Name a person for a particular job self default priority information of following ring station is broadcasted on RPR, and in conjunction with Fig. 3, its detailed process comprises:
Website D and website E broadcast the priority of self by the ATD message that default priority information is carried in transmission on RPR.
Wherein, carrying a kind of form that is provided with of the ATD message of precedence information can be shown in Fig. 5 a.
In Fig. 5 a, issue precedence information by in the ATD message, increasing new type (Type), length (Length) and value (Value), the following ring station point of each VLAN can be divided into 4 priority, represents the priority of ring station point down with 2bit in message.In Fig. 5, list item VLAN1 PRI represents the priority of this website as the following ring station point of VLAN 1; List item VLAN2 PRI represents the priority of this website as the following ring station point of VLAN 2, and the rest may be inferred.
In Fig. 5, when website D issue oneself is 3 as the default priority of the following ring station point of VLAN 10, the ATD message that carries precedence information of its transmission is shown in Fig. 5 b; And website E issue oneself is 2 as the default priority of the following ring station point of VLAN 10, and the ATD message that carries precedence information of its transmission is shown in Fig. 5 c.After going up ring station point A so and collecting these precedence informations, can determine preferentially to use the following ring station point of website D, and website E is as backup ring station point down as VLAN 10.
Step 403:
After obtaining the default priority of each time ring station point of described VLAN, the following ring station point that priority is the highest is set to the current ring station point down of this VLAN, if the following ring station point that priority is the highest has a plurality of, the MAC Address of each time ring station point relatively then, the following ring station point of MAC Address maximum is set to the current ring station point down of this VLAN, and its detailed process comprises:
Website A can obtain the default priority of website D and website E by resolving the ATD message, is respectively 3 and 2; The website D that website A priority is the highest is set to the current ring station point down of VLAN 10.
If the default priority of website D and website E all is 3 or all is 2 that then website A compares the MAC Address of these two websites, the website of MAC Address maximum is set to the current ring station point down of VLAN 10.
Step 404:
When the two layer message of described VLAN when last ring station point enters RPR, be this message encapsulation RPR frame head, and the MAC Address of in the destination address of RPR frame head, adding current following ring station point, promptly in the destination address domain of RPR growth data frame, add the current MAC Address of ring station point down, the message that will encapsulate again sends on RPR then, and its detailed process comprises:
When the two layer message of VLAN 10 when website A enters RPR, website A is for this message encapsulation RPR frame head the time, the MAC Address of website A will be added in the source address field of RPR growth data frame, add the MAC Address of website D in the destination address domain of RPR growth data frame, the message that will encapsulate again sends on RPR then.
Step 405:
If current ring station point down breaks down, or last ring station point and current link occurs fault between the ring station point down, the current priority of ring station point down is reduced to preset value, again the priority of each time ring station point among the more described VLAN, and the highest following ring station point of priority is set to the current ring station point down of described VLAN, in conjunction with Fig. 3, its process specifically comprises:
Website D break down or website A and website D between link T1 when breaking down, website A is reduced to 0 with the priority of the website D of its preservation, and each time ring station point of VLAN 10 relatively again, be website D and website E, priority, the website E that priority is the highest is set to the current down ring station point of VLAN 10.
Wherein, causing current down ring station point to break down, or go up ring station point and current to descend the reason of the link occurs fault between the ring station point may be the software reason of network system, also may be the hardware reason of network system.
When the two layer message of VLAN 10 when website A enters RPR, website A is for this message encapsulation RPR frame head the time, the MAC Address of website A will be added in the source address field of RPR growth data frame, add the MAC Address of website E in the destination address domain of RPR growth data frame, the message that will encapsulate again sends on RPR then.
The essence of said method is to be a plurality of ring station points down of VLAN configuration, when 1 following ring station point wherein breaks down, or when other link failure takes place, the two layer message of this VLAN can by other down the ring station point leave RPR, thereby avoid service traffics to interrupt.
Said method can further include:
When fault recovery, behind the precedence information that regains corresponding down ring station point, with the priority of each time ring station point relatively again, the following ring station point that priority is the highest is set to the ring station point current time, and in conjunction with Fig. 3, its detailed process comprises:
If the link T1 between website D or website A and the website D breaks down, after fault recovery, website D broadcasts the default priority information of self again on RPR, website A regains the precedence information of website D, and the priority of comparison site D and website E again, the following ring station point that priority is the highest is set to current ring station point down.
In said method, be 2 tunnel links of a VLAN configuration, also can realize purpose of the present invention equally for the tunnel of a VLAN configuration more than 2, no longer repeat here to illustrate.
When embodiment 2 understands current ring station point down specifically or goes up ring station point with current link occurs fault between the ring station point down, last ring station name a person for a particular job reduction current under the priority of ring station point, and the highest following ring station point of priority be set to current under the ring station point.
If current down ring station point or go up ring station point and do not break down, but other link occurs fault that links with current ring station point down with current link between the ring station point down, then current under the ring station priority of reduction self of naming a person for a particular job, and notify upward ring station point.The last ring station relatively priority of each time ring station point of naming a person for a particular job again, and the highest following ring station point of priority is set to current ring station point down, thus guarantee that the data service flow can not interrupt because of the link occurs fault that links with current ring station point down.
Do further below in conjunction with Fig. 3 and 3 pairs of these methods of embodiment and to specify.
Referring to Fig. 6, a kind of method of transmitting two layer message in RPR comprises:
Step 601～step 604 is identical with step 401～step 404 among the embodiment 1, no longer repeat specification here.
Step 605:
If with the link occurs fault that current ring station point down links, then reduce the current priority of ring station point down, and on RPR, broadcast, in conjunction with Fig. 3, its detailed process comprises:
If current down ring station point, i.e. link LD between website D, and the RPR ring external equipment D1 breaks down, and then website D is reduced to 1 with the priority of self from 3, and sends the ATD message that carries precedence information, broadcasts on RPR.
Step 606:
After the priority of knowing current down ring station point changed, the priority of each time ring station point relatively, and the highest following ring station point of priority again was set to the current time ring station point of described VLAN, and its process specifically comprises:
After website A receives the ATD message of website D transmission, resolve the priority that obtains website D behind this message, the priority of knowing website D is reduced to 1 from 3, and each time ring station point of VLAN 10 relatively again, be website D and website E, priority, the website E that priority is the highest is set to the current down ring station point of VLAN10.
When the two layer message of VLAN 10 when website A enters RPR, website A is for this message encapsulation RPR frame head the time, the MAC Address of website A will be added in the source address field of RPR growth data frame, add the MAC Address of website E in the destination address domain of RPR growth data frame, the message that will encapsulate again sends on RPR then.
Said method can further include:
When fault recovery, behind the precedence information that regains corresponding down ring station point, with the priority of each time ring station point relatively again, the following ring station point that priority is the highest is set to the ring station point current time, and in conjunction with Fig. 3, its detailed process comprises:
If the link LD fault recovery between website D and the RPR ring external equipment D1, website D is increased to 3 with the priority of self from 1, and the precedence information of self is broadcasted on RPR; Website A regains the precedence information of website D, and the priority of comparison site D and website E again, and the following ring station point that priority is the highest is set to current ring station point down.
In embodiment 2 and embodiment 3, a VLAN who is above ring station point is that example is done method of the present invention and specified, and in the actual conditions, last ring station point all independently carries out the operation of each VLAN, and the method that adopts is all identical, no longer repeats here to illustrate.
Based on said method, the present invention also provides a kind of device of transmitting two layer message in RPR, and as shown in Figure 7, this device comprises: message is transformed unit 701 and packet sending unit 702.
When two layer message entered RPR, transforming unit 701 by message can be this message encapsulation RPR frame head, and according to the VLAN under this message, the current MAC Address of ring station point down of this VLAN was added in the destination address of RPR frame head into; Then, by packet sending unit 702, the two layer message that is used for transforming by message after the unit encapsulates again sends on RPR.
Described device also comprises: following ring station point dispensing unit 703 and current ring station point down are provided with unit 704.
By following ring station point dispensing unit 703 can be VLAN configuration ring station point down; By current ring station point down the current ring station point down that unit 704 can be provided with VLAN is set.When VLAN had a following ring station point, this time ring station point was set to the current ring station point down of this VLAN; When VLAN had a plurality of times ring station points, the following ring station point that its medium priority is the highest was set to the current ring station point down of this VLAN.
When the highest following ring station of VLAN medium priority during o'clock more than, can also by current ring station point down be provided with unit 704 wherein the following ring station point of MAC Address maximum be set to the current time ring station point of described VLAN.
Described device comprises that also precedence information obtains unit 705.
Obtain the precedence information that unit 705 can obtain each time ring station point among the VLAN by precedence information, notify current ring station point 704 down that the unit is provided with described VLAN according to the precedence information of each time ring station point current ring station point down is set.
Claims (8)
1, a kind of method of transmitting two layer message in Resilient Packet Ring is characterized in that, comprising:
When encapsulating the RPR frame head for the two layer message that enters RPR, according to the VLAN under this message, the medium access control MAC Address of the current down ring station point of this VLAN is added in the destination address of RPR frame head into, the two layer message after encapsulating is again sent on RPR;
When being the following ring station point of described VLAN configuration during, according to the current time ring station point of the described VLAN of following arrangements of steps more than one:
Respectively in the priority of described each time ring station point this website of configuration in described VLAN, name a person for a particular job self precedence information of each time ring station is broadcasted on RPR;
The following ring station point that priority is the highest is set to the current ring station point down of described VLAN.
2, method according to claim 1 is characterized in that, further comprises:
When the highest following ring station of described VLAN medium priority during o'clock more than, wherein the following ring station point of MAC Address maximum is set to the current ring station point down of described VLAN.
3, method according to claim 1 is characterized in that, further comprises:
If the priority of each of described VLAN time ring station point changes, the priority of each time ring station point among this VLAN relatively again then, the following ring station point that priority is the highest is set to the current ring station point down of described VLAN.
4, method according to claim 3, it is characterized in that the priority of each of described VLAN time ring station point changes, and comprising: current ring station point down breaks down, or during with the link occurs fault of current down ring station spot correlation connection, reduces the current priority of descending ring station point;
Other down ring station point failure recover, or with other down during the link failure recovery of ring station spot correlation connection, improve the priority of this time ring station point.
5, method according to claim 1 is characterized in that, manually is described VLAN configuration ring station point down.
6, a kind of device of transmitting two layer message in Resilient Packet Ring is characterized in that, comprising:
Message is transformed the unit, is used to the two layer message encapsulation RPR frame head that enters RPR, and according to the VLAN under this message, the current MAC Address of ring station point down of this VLAN is added in the destination address of RPR frame head into;
Packet sending unit, the two layer message that is used for transforming by message after the unit encapsulates again sends on RPR.
Following ring station point dispensing unit is used to VLAN configuration ring station point down;
Current down ring station point is provided with the unit, is used to be provided with the current ring station point down of VLAN, and when VLAN had a following ring station point, this time ring station point was set to the current ring station point that descends of this VLAN; When VLAN had a plurality of times ring station points, the following ring station point that its medium priority is the highest was set to the current ring station point down of this VLAN.
7, device according to claim 6, it is characterized in that, described current down ring station point is provided with the unit and also is used for when the highest following ring station of VLAN medium priority during o'clock more than, and wherein the following ring station point of MAC Address maximum is set to the current time ring station point of this VLAN.
8, according to claim 6 or 7 described devices, it is characterized in that, also comprise:
Precedence information obtains the unit, is used for obtaining the precedence information of each time of VLAN ring station point, notifies current ring station point down that the unit is provided with VLAN according to the precedence information of each time ring station point current ring station point down is set.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200610099455.9A CN100505697C (en) | 2006-07-20 | 2006-07-20 | Method and apparatus retransmitting two-layer message in elastic block ring |
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| CN200610099455.9A CN100505697C (en) | 2006-07-20 | 2006-07-20 | Method and apparatus retransmitting two-layer message in elastic block ring |
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| CN100505697C true CN100505697C (en) | 2009-06-24 |
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