CN109412761B - Static PW MAC (pseudo wire MAC) with drawaw message interaction method and device - Google Patents
Static PW MAC (pseudo wire MAC) with drawaw message interaction method and device Download PDFInfo
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- CN109412761B CN109412761B CN201710712952.XA CN201710712952A CN109412761B CN 109412761 B CN109412761 B CN 109412761B CN 201710712952 A CN201710712952 A CN 201710712952A CN 109412761 B CN109412761 B CN 109412761B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
- H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
- H04L1/1607—Details of the supervisory signal
- H04L1/1642—Formats specially adapted for sequence numbers
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
- H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
- H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
- H04L1/1829—Arrangements specially adapted for the receiver end
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
- H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
- H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
- H04L1/1867—Arrangements specially adapted for the transmitter end
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L2101/00—Indexing scheme associated with group H04L61/00
- H04L2101/60—Types of network addresses
- H04L2101/618—Details of network addresses
- H04L2101/622—Layer-2 addresses, e.g. medium access control [MAC] addresses
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Abstract
The invention discloses a method and a device for static PW MAC (pseudo wire MAC) bypass message interaction, which relate to the technical field of static PW MAC bypass, and the method comprises the following steps: the message sending end sends N MAC (media access control) widdraw messages containing the MAC list to the message receiving end in batch, and waits for the response of the message receiving end to the sent N MAC widdraw messages after the batch sending is finished; after receiving the N MAC widdraw messages, the message receiving end generates a response message for each received MAC widdraw message, and sends the response message to the message sending end; and the message sending end determines whether to retransmit the N MAC widhdaw messages containing the MAC list according to the integrity of the received response message.
Description
Technical Field
The invention relates to the technical field of static PW (Pseudo-Wire) MAC (Media Access Control) with a browser, in particular to a method and a device for interacting static PW MAC with a browser message.
Background
RFC7769 describes a method for sending a MAC withdraw by a static PW, which is different from the method for sending a MAC withdraw by a dynamic PW described in RFC4762, where the static PW sends a MAC withdraw is to send a packet by using a PW forwarding channel, and the dynamic PW sends a MAC withdraw is to send a packet by using an LDP (Label Distribution Protocol) session channel, and the packet formats of the two are also different.
Fig. 1 shows the message format of the static PW transmit MAC with draw, from which it can be seen that "TLV (Type-Length-value, Type-Length-message storage content) Length" has only one byte size, so that the maximum Length of the entire message is only 255 bytes, 2 bytes of "TLV Length" are removed, 8 bytes of "Sequence TLV" and 4 bytes of the "MAC List TLV" header are removed, and at most, only 241 bytes store the MAC address; one MAC address is 6 bytes, and at most one message can only carry 40 MAC addresses.
The format of the message sent by the dynamic PW with MAC is based on the extension of LDP session message, and one message can carry more than 1000 MAC addresses.
Meanwhile, in order to ensure reliability, RFC7769 also specifies that after a sending end sends a static PW MAC with MAC list message, a receiving end needs to wait for the message to be received and then respond to a response message, and after receiving the response message, the sending end can continue to use the remaining MACs to construct the static PW MAC with MAC list message sending; fig. 2 shows an interaction flow of messages described in RFC 7769. The dynamic PW sends the MAC with drawraw message without this interaction process, and only needs to send the message until the MAC address is sent completely, and the reliability is ensured by the LDP session.
Therefore, the sending efficiency of the MAC (media access control) widraw message of the static PW is lower, and when a large number of MAC addresses need to be sent to the opposite end, the total time needed is much longer than that of the mode of sending the MAC widraw message of the dynamic PW; when the receiving end needs to delete the MAC and rebroadcast the data traffic, otherwise the flow may be interrupted, the static PW MAC with the draw mode may cause relatively long-time interruption.
Disclosure of Invention
The technical problem solved by the scheme provided by the embodiment of the invention is that the sending efficiency of the static PW MAC withdraw message is lower.
The method for interacting the static PW MAC with the draw message provided by the embodiment of the invention comprises the following steps:
the message sending end sends N MAC (media access control) widdraw messages containing the MAC list to the message receiving end in batch, and waits for the response of the message receiving end to the sent N MAC widdraw messages after the batch sending is finished;
after receiving the N MAC widdraw messages, the message receiving end generates a response message for each received MAC widdraw message, and sends the response message to the message sending end;
the message sending end determines whether to retransmit the N MAC widhdaw messages containing the MAC list according to the integrity of the received response message;
Wherein the PW refers to a pseudowire; the MAC refers to medium access control; the N is a positive integer.
Preferably, the MAC widhdraw message includes a message sequence number; the message sending end sends the message serial numbers of N MAC (media access control) with draww messages to the message receiving end in batches, and the message serial numbers are sequentially increased in sequence according to the sending sequence.
Preferably, after receiving the N MAC widdraw messages, the message receiving end generating a response message for each received MAC widdraw message includes:
after receiving a current MAC (media access control) within a bandwidth message, a message receiving end extracts a message serial number within the current MAC within the bandwidth message;
the message receiving end compares the message sequence number in the current MAC within the window message with the message sequence number in the last MAC within the window message to determine whether a response message corresponding to the current MAC within the window message needs to be generated;
if the comparison result between the message sequence number in the current MAC within the widget message and the message sequence number in the last MAC within the widget message is correct, the message receiving end determines that a response message corresponding to the current MAC within the widget message needs to be generated;
if the comparison result between the message sequence number in the current MAC within the bandwidth message and the message sequence number in the previous MAC within the bandwidth message is an error, the message receiving end determines that a response message corresponding to the current MAC within the bandwidth message does not need to be generated.
Preferably, the determining, by the message sending end, whether to retransmit the N MAC widhdaw messages containing the MAC list according to the integrity of the received response message includes:
the message sending end detects response messages corresponding to N MAC (media access control) widrowmessages sent in batch and judges whether the response messages are completely received or not;
if the response message is judged not to be completely received, the message sending end determines to retransmit the N MAC widhdaw messages containing the MAC list;
and if the response message is judged to be completely received, the message sending end determines not to retransmit the N MAC widhdaw messages containing the MAC list.
Preferably, the detecting, by the message sending end, the response messages corresponding to N MAC widhdaw messages sent in batch to determine whether all the response messages have been received includes:
the message sending end sequentially receives each response message sent by the message receiving end and obtains a message serial number from each response message;
and the message sending end judges whether the response message is completely received or not by counting the acquired message serial number.
The device for static PW MAC with drawdraw message interaction provided by the embodiment of the invention comprises:
The message sending end is used for sending N MAC (media access control) widraw messages containing the MAC list to the message receiving end in batch, waiting for the response of the message receiving end to the sent N MAC widraw messages after the batch sending is finished, and determining whether to retransmit the N MAC widraw messages containing the MAC list according to the integrity of the received response messages;
the message receiving end is used for generating a response message for each received MAC within message after receiving the N MAC within messages and sending the response message to the message sending end;
wherein the PW refers to a pseudowire; the MAC refers to medium access control; the N refers to a positive integer.
Preferably, the MAC within message includes a message sequence number; the message sending end sends the message serial numbers in N MAC with drawaw messages to the message receiving end in batch, and the message serial numbers are sequentially increased progressively according to the sending sequence.
Preferably, the message receiving end includes:
the extracting unit is used for extracting the message serial number in the current MAC within the message after receiving the current MAC within the message;
a determining unit, configured to determine whether a response packet corresponding to the current MAC within the window packet needs to be generated by comparing a packet sequence number in the current MAC within the window packet with a packet sequence number in a previous MAC within the window packet;
And the response message processing unit is used for determining that a response message corresponding to the current MAC widdraw message needs to be generated when the comparison result between the message sequence number in the current MAC widdraw message and the message sequence number in the last MAC widdraw message is correct, and determining that the response message corresponding to the current MAC widdraw message does not need to be generated when the comparison result between the message sequence number in the current MAC widdraw message and the message sequence number in the last MAC widdraw message is wrong.
Preferably, the message sending end includes:
the judging unit is used for detecting response messages corresponding to N MAC (media access control) widdraw messages sent in batch and judging whether the response messages are all received;
a retransmission processing unit, configured to determine to retransmit the N MAC widraw messages including the MAC list when it is determined that the response message is not completely received, and determine not to retransmit the N MAC widraw messages including the MAC list when it is determined that the response message is completely received.
Preferably, the determining unit is specifically configured to receive each response packet sent by a packet receiving end in sequence, obtain a packet sequence number from each response packet, and determine whether all the response packets have been received by counting the obtained packet sequence numbers.
According to the scheme provided by the embodiment of the invention, compared with the mode of sending a single message and sending the next message after waiting for the response, the mode of sending the waiting response in batch is adopted, so that the interaction efficiency of the static PW MAC with the draw message can be obviously improved, the deletion rate of the MAC address is improved, and the network flow-off time is shortened.
Drawings
Fig. 1 is a flowchart of a method for interacting with a static PW MAC message according to an embodiment of the present invention;
fig. 2 is a schematic diagram of a static PW MAC with drawaw message interaction apparatus according to an embodiment of the present invention;
fig. 3 is a message format of a static PW sending MAC with drawraw according to an embodiment of the present invention;
fig. 4 is a schematic view of an interaction flow of messages described in RFC7769 according to an embodiment of the present invention;
fig. 5 is an interaction flowchart of messages when all response messages are received according to an embodiment of the present invention;
fig. 6 is a flowchart of retransmission when not receiving all response messages according to the embodiment of the present invention.
Detailed Description
The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings, and it should be understood that the preferred embodiments described below are only for the purpose of illustrating and explaining the present invention, and are not to be construed as limiting the present invention.
Fig. 1 is a flowchart of a method for static PW MAC with drawaw message interaction according to an embodiment of the present invention, as shown in fig. 1, including:
step S101: the message sending end sends N MAC (media access control) widdraw messages containing the MAC list to the message receiving end in batch, and waits for the response of the message receiving end to the sent N MAC widdraw messages after the batch sending is finished;
step S102: after receiving the N MAC widdraw messages, the message receiving end generates a response message for each received MAC widdraw message, and sends the response message to the message sending end;
step S103: the message sending end determines whether to retransmit the N MAC widhdaw messages containing the MAC list according to the integrity of the received response message;
wherein the PW refers to a pseudowire; the MAC refers to medium access control; the N refers to a positive integer.
The MAC thrahdraw message comprises a message sequence number; the message sending end sends the message serial numbers in N MAC with drawaw messages to the message receiving end in batch, and the message serial numbers are sequentially increased progressively according to the sending sequence.
After receiving the N MAC widhdaw messages, the message receiving end generates a response message for each received MAC widhdaw message, where the response message includes: after receiving a current MAC (media access control) bypass message, a message receiving end extracts a message serial number in the current MAC bypass message; the message receiving end compares the message sequence number in the current MAC within the message with the message sequence number in the last MAC within the message to determine whether a response message corresponding to the current MAC within the message needs to be generated; if the comparison result between the message sequence number in the current MAC widdraw message and the message sequence number in the last MAC widdraw message is correct, the message receiving end determines that a response message corresponding to the current MAC widdraw message needs to be generated; and if the comparison result between the message sequence number in the current MAC widdraw message and the message sequence number in the last MAC widdraw message is an error, the message receiving end determines that a response message corresponding to the current MAC widdraw message does not need to be generated.
The determining, by the message sending end, whether to retransmit the N MAC widdraw messages including the MAC list according to the integrity of the received response message includes: the message sending end detects response messages corresponding to N MAC (media access control) widdraw messages sent in batch and judges whether the response messages are all received; if the response message is judged not to be completely received, the message sending end determines to retransmit the N MAC widhdaw messages containing the MAC list; and if the response message is judged to be completely received, the message sending end determines not to retransmit the N MAC widhdaw messages containing the MAC list. Specifically, the step of determining whether all the response messages have been received by the message sending end by detecting the response messages corresponding to the N MAC widhdaw messages sent in batch includes: the message sending end sequentially receives each response message sent by the message receiving end and obtains a message sequence number from each response message; and the message sending end judges whether the response message is completely received or not by counting the acquired message serial number.
Fig. 2 is a schematic diagram of a static PW MAC with drawaw message interaction apparatus according to an embodiment of the present invention, as shown in fig. 2, including: the message sending end 201 is configured to send N MAC widdraw messages containing the MAC list to the message receiving end in batch, wait for a response of the message receiving end to the sent N MAC widdraw messages after the batch sending is finished, and determine whether to retransmit the N MAC widdraw messages containing the MAC list according to the integrity of the received response message; a message receiving end 202, configured to generate, after receiving the N MAC widdraw messages, a response message for each received MAC widdraw message, and send the response message to the message sending end; wherein the PW refers to a pseudowire; the MAC refers to medium access control; the N is a positive integer.
The MAC thrahdraw message comprises a message sequence number; the message sending end sends the message serial numbers of N MAC (media access control) with draww messages to the message receiving end in batches, and the message serial numbers are sequentially increased in sequence according to the sending sequence.
The message receiving end 202 includes: the extracting unit is used for extracting the message serial number in the current MAC within the bandwidth message after receiving the current MAC within the bandwidth message; a determining unit, configured to determine whether a response packet corresponding to the current MAC within the window packet needs to be generated by comparing a packet sequence number in the current MAC within the window packet with a packet sequence number in a previous MAC within the window packet; and the response message processing unit is used for determining that a response message corresponding to the current MAC wi-dra message needs to be generated when the comparison result between the message sequence number in the current MAC wi-dra message and the message sequence number in the last MAC wi-dra message is correct, and determining that the response message corresponding to the current MAC wi-dra message does not need to be generated when the comparison result between the message sequence number in the current MAC wi-dra message and the message sequence number in the last MAC wi-dra message is wrong.
The message sending end 201 includes: the judging unit is used for detecting response messages corresponding to N MAC (media access control) widdraw messages sent in batch and judging whether the response messages are all received; a retransmission processing unit, configured to determine to retransmit the N MAC widraw messages including the MAC list when it is determined that the response message is not completely received, and determine not to retransmit the N MAC widraw messages including the MAC list when it is determined that the response message is completely received. Specifically, the determining unit is specifically configured to receive each response packet sent by a packet receiving end in sequence, obtain a packet sequence number from each response packet, and determine whether all the response packets have been received by counting the obtained packet sequence numbers.
The embodiment of the invention also provides a system for realizing static PW MAC with drawdraw message interaction, which comprises:
the MAC withdraw message sending module comprises: and sending the MAC within the range of the MAC list, submitting the efficiency in a batch sending mode, sending N MAC within the range of the MAC list at one time without waiting for response, and waiting for response again.
The MAC with the MAC list receives and processes the message with the drawing: and when the MAC list message is received, deleting the MAC and responding to the response message.
The MAC withdraw response message receiving and processing module comprises: and receiving and processing the MAC within response messages, and triggering the next batch of N MAC within response messages with the MAC list when the response messages corresponding to the N MAC within response messages with the MAC list are all received.
The MAC with message retransmission module comprises: and the method is used for retransmitting the MAC withdraw message when the response message is not received in a certain time.
The method of the present invention is further described in detail below with reference to the accompanying drawings and specific examples.
Fig. 3 shows an interaction flow of messages when all response messages are received, and the method includes the following steps:
And 2, the sending end sends the MAC withdraw messages with the MAC list in batch. The method comprises the following specific steps:
Taking out the front N groups of MAC in the queue, respectively constructing MAC with MAC list and sending the MAC with drawlaw messages in Sequence, sequentially increasing the Sequence in each message, and recording the Sequence of the first message as Sequence-x;
waiting for the response of the opposite terminal equipment;
and step 3, the receiving end receives the processing of the MAC withdraw message with the MAC list. The method comprises the following specific steps:
the receiving end receives a first MAC with MAC list and with draww message, compares the Sequence, deletes the MAC and sends response;
the receiving end sequentially receives the second to the Nth MAC with MAC list and the like with drawdraw messages, compares the Sequence, deletes the MAC and sends a response;
and 4, processing the response message received by the sending end. The method comprises the following specific steps:
the sending end receives a response message, takes out the Sequence field in the response message and records the Sequence field;
judging whether response messages containing all sequences from Sequence-x to Sequence-x + N recorded in the step 2 are received, and if so, repeating the step 2; if not, then continue waiting.
Fig. 4 shows a retransmission process when not receiving all the response messages, and the method thereof includes the following steps:
And 2, the sending end sends the MAC withdraw messages with the MAC list in batch. The method comprises the following specific steps:
taking out the front N groups of MAC in the queue, respectively constructing MAC with MAC list and sending the MAC with drawlaw messages in Sequence, sequentially increasing the Sequence in each message, and recording the Sequence of the first message as Sequence-x;
waiting for the response of the opposite terminal equipment;
and 3, if the sending end receives the response message, the response message needs to be processed. The method comprises the following specific steps:
the sending end receives a response message, takes out and records the Sequence field in the response message;
judging whether all the response messages containing all the sequences from the Sequence-x to the Sequence-x + N recorded in the step 2 are received, if so, repeating the step 2; if not, then continue waiting.
And 4, after the sending end waits for 1 second, all the response messages are still not received.
And re-sending the N groups of MAC taken out before, noting that the Sequence in the first message needs to be changed into Sequence-x + N, sequentially increasing the Sequence of the following messages, and updating the Sequence-x into Sequence-x + N.
And 5, after waiting for 1 second again, processing according to the step 4 again if all the response messages are still not received.
And 6, after waiting for 1 second again, not receiving all the messages.
And (4) returning to the step 2 for processing, but increasing the Sequence of the first sent message by N again.
According to the scheme provided by the embodiment of the invention, the MAC withdraw messages with the MAC list are sent in batch, so that the message interaction efficiency is improved, the deletion rate of the MAC address is increased, and the network flow breaking time is shortened. The invention optimizes the processing flow of the sending end described in RFC7769, does not modify the processing flow of the receiving end, and does not affect the docking with other equipment in the network according to RFC 7769.
Although the present invention has been described in detail hereinabove, the present invention is not limited thereto, and various modifications can be made by those skilled in the art in light of the principle of the present invention. Thus, modifications made in accordance with the principles of the present invention should be understood to fall within the scope of the present invention.
Claims (6)
1. A static PW MAC with drawdraw message interaction method includes:
the message sending end sends N MAC (media access control) widdraw messages containing the MAC list to the message receiving end in batch, and waits for the response of the message receiving end to the sent N MAC widdraw messages after the batch sending is finished;
After receiving each MAC (media access control) widget message, a message receiving end extracts a message serial number in each MAC widget message, generates a response message containing the message serial number for each received MAC widget message according to the message serial number, and sends the response message to the message sending end;
the message sending end detects response messages corresponding to N MAC (media access control) widdraw messages sent in batch and judges whether the response messages are all received; if the response message is judged not to be completely received, the message sending end determines to retransmit the N MAC widhdaw messages containing the MAC list; if the response message is judged to be completely received, the message sending end determines not to retransmit the N MAC widdraw messages containing the MAC list;
the message sending end detects response messages corresponding to N MAC widhdaw messages sent in batch, and judging whether the response messages are all received comprises the following steps:
the message sending end sequentially receives each response message sent by the message receiving end and obtains a message serial number from each response message;
the message sending end judges whether the response message is completely received or not by counting the obtained message serial number;
Wherein the PW refers to a pseudowire; the MAC refers to medium access control; the N refers to a positive integer.
2. The method according to claim 1, wherein the MAC with message comprises a message sequence number; the message sending end sends the message serial numbers of N MAC (media access control) with draww messages to the message receiving end in batches, and the message serial numbers are sequentially increased in sequence according to the sending sequence.
3. The method according to claim 2, wherein the generating, by the message receiving end, a response message for each received MAC widhdaw message after receiving the N MAC widhdaw messages includes:
after receiving a current MAC (media access control) bypass message, a message receiving end extracts a message serial number in the current MAC bypass message;
the message receiving end compares the message sequence number in the current MAC within the message with the message sequence number in the last MAC within the message to determine whether a response message corresponding to the current MAC within the message needs to be generated;
if the comparison result between the message sequence number in the current MAC widdraw message and the message sequence number in the last MAC widdraw message is correct, the message receiving end determines that a response message corresponding to the current MAC widdraw message needs to be generated;
And if the comparison result between the message sequence number in the current MAC widdraw message and the message sequence number in the last MAC widdraw message is an error, the message receiving end determines that a response message corresponding to the current MAC widdraw message does not need to be generated.
4. A static PW MAC withdraw message interaction device comprises:
the message sending end is used for sending N MAC (media access control) widdraw messages containing the MAC list to the message receiving end in batch, waiting for the response of the message receiving end to the sent N MAC widdraw messages after the batch sending is finished, and judging whether the response messages are all received or not by detecting the response messages corresponding to the N MAC widdraw messages sent in batch; if the response messages are judged not to be completely received, determining to retransmit the N MAC widdraw messages containing the MAC list; if the response message is judged to be completely received, determining not to retransmit the N MAC widhdaw messages containing the MAC list; the message sending end comprises a judging unit; the judging unit is specifically configured to receive each response message sent by a message receiving end in sequence, acquire a message serial number from each response message, and judge whether all the response messages are received by counting the acquired message serial numbers;
The message receiving end is used for extracting the message serial number in each MAC thraw message after each MAC thraw message is received, generating a response message containing the message serial number for each received MAC thraw message according to the message serial number, and sending the response message to the message sending end;
wherein the PW refers to a pseudowire; the MAC refers to medium access control; the N refers to a positive integer.
5. The apparatus of claim 4, wherein the MAC within a message comprises a message sequence number; the message sending end sends the message serial numbers of N MAC (media access control) with draww messages to the message receiving end in batches, and the message serial numbers are sequentially increased in sequence according to the sending sequence.
6. The apparatus of claim 5, the message receiving end comprising:
the extracting unit is used for extracting the message serial number in the current MAC within the message after receiving the current MAC within the message;
a determining unit, configured to determine whether a response packet corresponding to the current MAC within the window packet needs to be generated by comparing a packet sequence number in the current MAC within the window packet with a packet sequence number in a previous MAC within the window packet;
and the response message processing unit is used for determining that a response message corresponding to the current MAC wi-dra message needs to be generated when the comparison result between the message sequence number in the current MAC wi-dra message and the message sequence number in the last MAC wi-dra message is correct, and determining that the response message corresponding to the current MAC wi-dra message does not need to be generated when the comparison result between the message sequence number in the current MAC wi-dra message and the message sequence number in the last MAC wi-dra message is wrong.
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