CN113810511A - ARP table updating method and device - Google Patents

ARP table updating method and device Download PDF

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Publication number
CN113810511A
CN113810511A CN202110900009.8A CN202110900009A CN113810511A CN 113810511 A CN113810511 A CN 113810511A CN 202110900009 A CN202110900009 A CN 202110900009A CN 113810511 A CN113810511 A CN 113810511A
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address
source
arp
mac address
access network
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CN113810511B (en
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张起强
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Ruijie Networks Co Ltd
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Ruijie Networks Co Ltd
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L61/00—Network arrangements, protocols or services for addressing or naming
    • H04L61/09—Mapping addresses
    • H04L61/10—Mapping addresses of different types
    • H04L61/103—Mapping addresses of different types across network layers, e.g. resolution of network layer into physical layer addresses or address resolution protocol [ARP]

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  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
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  • Small-Scale Networks (AREA)

Abstract

The invention discloses a method and a device for updating an ARP table, wherein the method comprises the following steps: after receiving an ARP message sent by a terminal connected downstream, sending a query message carrying a source IP address and a source MAC address of the ARP message to a first selected convergence network device; if a response message which carries a result that the source IP address and the source MAC address are not found is received, adding a first ARP table item comprising the source IP address and the source MAC address in an ARP table; if a detection message which is sent by the second selected aggregation network device and carries the first IP address and the second MAC address is received, ARP detection is initiated based on the first IP address and the second MAC address, if an ARP response is not received, a second ARP table item comprising the first IP address and the second MAC address is deleted from the ARP table, and a deletion notice carrying the first IP address and the second MAC address is sent to the second selected aggregation network device. The scheme can shorten the deletion time of the ARP table entry.

Description

ARP table updating method and device
Technical Field
The present invention relates to the field of communications technologies, and in particular, to a method and an apparatus for updating an Address Resolution Protocol (ARP) table.
Background
In the three-layer to edge network architecture shown in fig. 1, at least two aggregation network devices (shown in the figure as including two aggregation network devices) are respectively connected to at least two access network devices to form a full network (full mesh), each access network device learns an ARP entry of a downstream terminal, converts the ARP entry into a route and synchronizes the route to each aggregation network device, and each aggregation network device has a route of the full network.
In a static Internet Protocol (IP) address scenario, after an online terminal goes offline, an access network device connected to the terminal deletes an ARP entry corresponding to the terminal when the ARP entry reaches an aging duration, and then notifies each aggregation network device to delete a route corresponding to the ARP entry, thereby implementing route update of each aggregation network device.
In the method for updating the ARP table, the ARP table entry cannot be aged in time, the ARP table entry needs to be deleted after the aging time is up, if the aging time is not up and another terminal uses the same IP address to be online, two paths of the IP address are stored on each aggregation network device, so that an equivalent route is formed, if the aggregation network device receives a message of the equivalent route in matching and forwards the message to an access network device corresponding to an offline terminal, and if the online terminal cannot receive the message, packet loss occurs, so that the network is disconnected from the terminal, and user experience is greatly influenced.
Disclosure of Invention
The embodiment of the invention provides an updating method and device of an ARP table, which are used for solving the problem that the ARP table entry cannot be aged in time in the prior art.
According to an embodiment of the present invention, there is provided a method for updating an ARP table, which is applied to at least two access network devices included in a three-tier to edge network, where the three-tier to edge network further includes at least two aggregation network devices, and the at least two aggregation network devices share a configuration table and are respectively connected to the at least two access network devices, the method including:
after receiving an ARP message sent by a terminal connected downstream, sending a query message carrying a source Internet Protocol (IP) address and a source Media Access Control (MAC) address of the ARP message to a first selected aggregation network device of the at least two aggregation network devices so as to enable the first selected aggregation network device to query the source IP address in the setting table, if the source IP address is found in the setting table, returning a response message carrying the found source IP address and the source MAC address as a carrying result, and sending a detection message carrying the source IP address and the first MAC address included in the first table item corresponding to a first device identifier included in the first table item where the source IP address is located in the setting table, and if the source IP address is not found in the setting table, returning the first access network device carrying the source IP address and the first MAC address included in the first table item as a carrying result that the source IP address and the first MAC address are not found, The source IP address and the response message of the source MAC address, and a second table item comprising the source IP address, the source MAC address and a second device identifier of a second access network device which sends the query message are established in the setting table;
if a response message carrying a result that the source IP address and the source MAC address are not found is received, adding a first ARP table item comprising the source IP address and the source MAC address in an ARP table;
if a detection message which is sent by a second selected aggregation network device of the at least two network aggregation devices and carries a first IP address and a second MAC address is received, ARP detection is initiated based on the first IP address and the second MAC address, if an ARP response is not received, a second ARP table entry comprising the first IP address and the second MAC address is deleted from the ARP table, and a deletion notice carrying the first IP address and the second MAC address is sent to the second selected aggregation network device, so that the second selected aggregation network device deletes a third table entry comprising the first IP address and the second MAC address from the setting table.
Optionally, the method further includes:
and if receiving a response message carrying the result of finding the source IP address and the source MAC address, suspending receiving the ARP message sent by the terminal within a set time length.
Optionally, the method further includes:
and if an ARP response is received, sending a survival announcement carrying the first IP address and the second MAC address to the second selected aggregation network equipment so as to enable the second selected aggregation network equipment to reserve the third entry.
According to an embodiment of the present invention, there is further provided an ARP table updating method applied to at least two aggregation network devices included in a three-layer to edge network, where the three-layer to edge network further includes at least two access network devices, and the at least two aggregation network devices share a configuration table and are respectively connected to the at least two access network devices, the method including:
receiving an inquiry message carrying a source IP address and a source MAC address of an ARP message sent by a second access network device of the at least two access network devices after the second access network device receives the ARP message sent by a downlink terminal;
querying the source IP address in the profile;
if the source IP address is found in the setting table, returning a response message carrying the found source IP address and the source MAC address as a carrying result, so that the second access network equipment suspends receiving the ARP message sent by the terminal within a set time length; sending a detection message carrying the source IP address and a first MAC address included in a first table item of the source IP address to a first access network device corresponding to a first device identifier included in the first table item in the setting table, so that the first access network device initiates ARP detection based on the source IP address and the first MAC address, if an ARP response is not received, deleting a third ARP table item including the source IP address and the first MAC address from an ARP table of the first access network device, and returning a deletion notice carrying the source IP address and the first MAC address; deleting the first table entry in the setting table based on the deletion notification;
if the source IP address is not found in the setting table, establishing a second table entry comprising the source IP address, the source MAC address and a second device identifier of the second access network device in the setting table, and returning a response message carrying the source IP address and the source MAC address which are not found, so that the second access network device adds a first ARP table entry comprising the source IP address and the source MAC address in an ARP table of the second access network device.
Optionally, the method further includes:
if receiving a survival notice carrying the source IP address and the first MAC address sent by the first access network equipment after receiving the ARP response, reserving the first table entry in the setting table.
According to an embodiment of the present invention, there is further provided an apparatus for updating an ARP table, which is applied to at least two access network devices included in a three-tier to edge network, where the three-tier to edge network further includes at least two aggregation network devices, and the at least two aggregation network devices share a setting table and are respectively connected to the at least two access network devices, the apparatus including:
a forwarding module, configured to send, after receiving an ARP packet sent by a downstream terminal, an inquiry packet carrying a source internet protocol IP address and a source media access control MAC address of the ARP packet to a first selected aggregation network device of the at least two aggregation network devices, so that the first selected aggregation network device inquires the source IP address in the setting table, if the source IP address is found in the setting table, return a response packet carrying a result of the inquiry, the source IP address and the source MAC address, and send, to a first access network device corresponding to a first device identifier included in a first entry where the source IP address is located in the setting table, a detection packet carrying the source IP address and a first MAC address included in the first entry, and if the source IP address is not found in the setting table, return a carrying result of the inquiry that the source IP address and the first MAC address included in the first entry are not found, The source IP address and the response message of the source MAC address, and a second table item comprising the source IP address, the source MAC address and a second device identifier of a second access network device which sends the query message are established in the setting table;
an adding module, configured to add a first ARP entry including the source IP address and the source MAC address to an ARP table if a response packet with a result that the source IP address and the source MAC address are not found is received;
a processing module, configured to initiate an ARP detection based on a first IP address and a second MAC address if a detection message carrying the first IP address and the second MAC address is received from a second selected aggregation network device of the at least two network aggregation devices, delete a second ARP entry including the first IP address and the second MAC address from the ARP table if an ARP response is not received, and send a deletion notification carrying the first IP address and the second MAC address to the second selected aggregation network device, so that the second selected aggregation network device deletes a third entry including the first IP address and the second MAC address from the setting table.
Optionally, the system further comprises a pause module, configured to:
and if receiving a response message carrying the result of finding the source IP address and the source MAC address, suspending receiving the ARP message sent by the terminal within a set time length.
Optionally, the system further includes an announcing module, configured to:
and if an ARP response is received, sending a survival announcement carrying the first IP address and the second MAC address to the second selected aggregation network equipment so as to enable the second selected aggregation network equipment to reserve the third entry.
According to an embodiment of the present invention, there is further provided an apparatus for updating an ARP table, which is applied to at least two aggregation network devices included in a three-tier to edge network, where the three-tier to edge network further includes at least two access network devices, and the at least two aggregation network devices share a configuration table and are respectively connected to the at least two access network devices, the apparatus including:
the receiving module is used for receiving an inquiry message which is sent by a second access network device of the at least two access network devices after receiving an ARP message sent by a downlink terminal and carries a source IP address and a source MAC address of the ARP message;
the query module is used for querying the source IP address in the setting table;
the processing module is used for returning a response message carrying the searched result, the source IP address and the source MAC address if the source IP address is searched in the setting table, so that the second access network equipment suspends receiving the ARP message sent by the terminal within a set time length; sending a detection message carrying the source IP address and a first MAC address included in a first table item of the source IP address to a first access network device corresponding to a first device identifier included in the first table item in the setting table, so that the first access network device initiates ARP detection based on the source IP address and the first MAC address, if an ARP response is not received, deleting a third ARP table item including the source IP address and the first MAC address from an ARP table of the first access network device, and returning a deletion notice carrying the source IP address and the first MAC address; deleting the first table entry in the setting table based on the deletion notification; if the source IP address is not found in the setting table, establishing a second table entry comprising the source IP address, the source MAC address and a second device identifier of the second access network device in the setting table, and returning a response message carrying the source IP address and the source MAC address which are not found, so that the second access network device adds a first ARP table entry comprising the source IP address and the source MAC address in an ARP table of the second access network device.
Optionally, the system further comprises a reservation module, configured to:
if receiving a survival notice carrying the source IP address and the first MAC address sent by the first access network equipment after receiving the ARP response, reserving the first table entry in the setting table.
According to the embodiment of the invention, the electronic equipment comprises a processor, a communication interface, a memory and a communication bus, wherein the processor, the communication interface and the memory complete mutual communication through the communication bus;
a memory for storing a computer program;
a processor for implementing the above method steps when executing the program stored in the memory.
According to an embodiment of the present invention, there is also provided a computer-readable storage medium having stored therein a computer program, which when executed by a processor, performs the above-mentioned method steps.
The invention has the following beneficial effects:
the embodiment of the invention provides an updating method and a device of an ARP table, after receiving an ARP message sent by a terminal connected downstream, sending a query message carrying a source Internet Protocol (IP) address and a source Media Access Control (MAC) address of the ARP message to a first selected convergent network device in at least two convergent network devices so as to enable the first selected convergent network device to query the source IP address in a setting table, if the source IP address is found in the setting table, returning a response message carrying the found source IP address and the source MAC address as a carrying result, sending a detection message carrying the source IP address and the first MAC address included in a first table item in which the source IP address is located to a first access network device corresponding to a first device identifier included in the first table item, and if the source IP address is not found in the setting table, returning a response message carrying the source IP address and the source MAC address which are not found in the result, and establishing a second table item comprising the source IP address, the source MAC address and a second equipment identifier of second access network equipment for sending the query message in the setting table; if a response message carrying a result that the source IP address and the source MAC address are not found is received, adding a first ARP table item comprising the source IP address and the source MAC address in an ARP table; if a detection message which is sent by a second selected aggregation network device of the at least two network aggregation devices and carries a first IP address and a second MAC address is received, ARP detection is initiated based on the first IP address and the second MAC address, if an ARP response is not received, a second ARP table entry comprising the first IP address and the second MAC address is deleted from the ARP table, and a deletion notice carrying the first IP address and the second MAC address is sent to the second selected aggregation network device, so that the second selected aggregation network device deletes a third table entry comprising the first IP address and the second MAC address from the setting table. In the scheme, after the access network equipment receives the ARP message sent by the terminal connected downstream, the access network equipment does not automatically learn the ARP table entries, but cooperates with the first selected aggregation network equipment in at least two aggregation network equipment to determine whether to add the ARP table entries or delete the ARP table entries, and does not delete the ARP table entries after the aging duration of the ARP table entries is expired, so that the deletion time of the ARP table entries can be shortened, the situation that the terminal on line cannot receive the message is avoided, the phenomena of packet loss and network disconnection of the terminal are avoided, and the user experience is greatly improved.
Drawings
FIG. 1 is a schematic diagram of a three-tier to edge network architecture of the prior art;
FIG. 2 is a flowchart of a method for updating an ARP table based on access network equipment according to an embodiment of the present invention;
fig. 3 is a flowchart of an ARP table updating method based on a converged network device according to an embodiment of the present invention;
FIG. 4 is a schematic structural diagram of an apparatus for updating the ARP table corresponding to FIG. 2 according to an embodiment of the present invention;
FIG. 5 is a schematic structural diagram of an apparatus for updating the ARP table corresponding to FIG. 3 according to an embodiment of the present invention;
fig. 6 is a schematic structural diagram of an electronic device shown in the present application.
Detailed Description
For the problem that the ARP entry cannot be timely aged in the prior art, an embodiment of the present invention provides an ARP table updating method, which may be applied to at least two access network devices and at least two aggregation network devices included in a three-layer to edge network, where the at least two aggregation network devices share a setting table and are respectively connected to the at least two access network devices, and the ARP table updating method using the access network devices and the aggregation network devices as execution main bodies is described below.
First, an ARP table updating method with access network equipment as the execution subject is introduced, and the flow of the method is shown in fig. 2, and the execution steps are as follows:
s21: after receiving an ARP message sent by a terminal connected downstream, sending a query message carrying a source IP Address and a source Media Access Control (MAC) Address of the ARP message to a first selected aggregation network device of at least two aggregation network devices so that the first selected aggregation network device queries the source IP Address in a setting table, if the source IP Address is found in the setting table, returning a response message carrying the source IP Address and the source MAC Address as a result of the query, sending a detection message carrying the source IP Address and the first MAC Address included in a first table item of the source IP Address in the setting table to a first Access network device corresponding to a first device identifier included in the first table item, and if the source IP Address is not found in the setting table, returning a response message carrying the source IP Address and the source MAC Address as a result of the query, and establishing a network device including the source IP Address, the source MAC Address, the Media Access Control (MAC) Address in the setting table, A source MAC address and a second entry of a second device identifier of a second access network device that sent the query message.
After the terminal is connected with the access network equipment, various types of ARP messages can be sent, for example, ARP free messages, ARP request messages and the like, after the access network equipment receives any type of ARP messages, because at least two pieces of aggregation network equipment share a setting table, one aggregation network equipment can be selected from at least two pieces of aggregation network equipment, the selected aggregation network equipment can be defined as a first selected aggregation network equipment, then a query message is sent to the first selected aggregation network equipment, the query message carries a source IP address and a source MAC address of the ARP messages, the first selected aggregation network equipment queries the source IP address in the setting table, if the source IP address is found, the query message corresponding to the source IP address is received before, namely the source IP address is used before, on one hand, a response message carrying the result of the found source IP address and the source MAC address is returned, on the other hand, a detection message carrying the source IP address and the MAC address (which may be defined as a first MAC address) included in the first entry is sent to an access network device (which may be defined as a first access network device) corresponding to a device identifier (which may be defined as a first device identifier) included in an entry (which may be defined as a first entry) where the source IP address is located in the setting table, so that the first access network device initiates ARP detection; if the source IP address is not found, it indicates that the source IP address is not used currently, on one hand, a response message carrying the source IP address and the source MAC address which are not found is returned, and on the other hand, an entry (which may be defined as a second entry) of the device identifier (which may be defined as a second device identifier) of the access network device (which may be defined as a second access network device, that is, the execution subject of the method for updating the ARP table shown in fig. 2 is the second access network device) that sends the query message is established in the setting table.
S22: and if a response message carrying the result that the source IP address and the source MAC address are not found is received, adding a first ARP table item comprising the source IP address and the source MAC address in the ARP table.
If the second access network device receives a response message which carries a result that the source IP address and the source MAC address are not found, indicating that the source IP address is not currently used, adding an ARP entry (which may be defined as a first ARP entry) including the source IP address and the source MAC address in the ARP entry.
S23: if a detection message carrying a first IP address and a second MAC address and sent by a second selected aggregation network device of the at least two network aggregation devices is received, ARP detection is initiated based on the first IP address and the second MAC address, if an ARP response is not received, a second ARP table entry comprising the first IP address and the second MAC address is deleted from the ARP table, and a deletion notice carrying the first IP address and the second MAC address is sent to the second selected aggregation network device, so that the second selected aggregation network device deletes a third table entry comprising the first IP address and the second MAC address from the setting table.
If the second access network device receives a detection message carrying the first IP address and the second MAC address sent by a second selected aggregation network device of the at least two network aggregation devices, it indicates that the second selected aggregation network device receives an inquiry message carrying the first IP address and the second MAC address, and the second access network device has a terminal corresponding to the first IP address in a downlink connection, at this time, the second access network device needs to initiate ARP detection based on the first IP address and the second MAC address, and specifically, the second MAC address can be used as a destination MAC address, and the first IP address is carried in an ARP detection message, so as to implement ARP detection, since the unicast message is sent, if the corresponding terminal receives the message, an ARP response is sent, and if the second access network device does not receive the ARP response, it indicates that the corresponding terminal has been offline, then a table entry (which may be defined as a second ARP) including the first IP address and the second MAC address is deleted from the ARP table, therefore, the ARP table items are deleted in time, a deletion notice carrying the first IP address and the second MAC address is sent to the second selected aggregation network equipment, and the second selected aggregation network equipment deletes the third table items comprising the first IP address and the second MAC address from the setting table, so that the accuracy of the setting table is ensured.
It should be noted that, the first selected aggregation network device may be the same as or different from the second selected aggregation network device, and when the first selected aggregation network device is the same as the second selected aggregation network device, the first IP address is a source IP address, and the first MAC address is a source MAC address, and when the first selected aggregation network device is different from the second selected aggregation network device, the first IP address is not a source IP address, and the first MAC address is not a source MAC address.
In the scheme, after the access network equipment receives the ARP message sent by the terminal connected downstream, the access network equipment does not automatically learn the ARP table entries, but cooperates with the first selected aggregation network equipment in at least two aggregation network equipment to determine whether to add the ARP table entries or delete the ARP table entries, and does not delete the ARP table entries after the aging duration of the ARP table entries is expired, so that the deletion time of the ARP table entries can be shortened, the situation that the terminal on line cannot receive the message is avoided, the phenomena of packet loss and network disconnection of the terminal are avoided, and the user experience is greatly improved.
Optionally, the method further includes:
and if the received response message carrying the result of the search, the source IP address and the source MAC address is received, suspending the ARP message sent by the receiving terminal within the set time length.
If the second access network device receives the response message carrying the result that the source IP address and the source MAC address are found, and the IP conflict occurs because the source IP address is used before, the ARP message sent by the terminal is paused to be received within the set time length, the ARP message sent by the terminal is received again after the set time length expires, and the steps from S21 to S23 are executed.
The set time period may be set according to actual needs, and for example, may be set to 1 second, 2 seconds, and the like.
Optionally, the method further includes:
and if the ARP response is received, sending a survival notice carrying the first IP address and the second MAC address to the second selected aggregation network equipment so as to enable the second selected aggregation network equipment to keep a third table entry.
If the second access network device receives the ARP response, the first IP address is used by the terminal, so that the survival notice carrying the first IP address and the second MAC address is sent to the second selected aggregation network device, and the second selected aggregation network device keeps the third table entry to ensure the accuracy of the setting table.
The ARP table updating method using the access network device as the execution subject is introduced above, and the ARP table updating method using the aggregation network device as the execution subject is introduced below, where the flow of the method is shown in fig. 3, and the execution steps are as follows:
s31: and receiving an inquiry message carrying the source IP address and the source MAC address of the ARP message, which is sent by a second access network device of at least two access network devices after the second access network device receives the ARP message sent by the terminal of the downlink.
After any access network device (which may be defined as a second access network device) of the at least two access network devices receives an ARP message sent by a downlink terminal, one of the at least two aggregation network devices is selected as a selected aggregation network device, and an inquiry message carrying a source IP address and a source MAC address of the ARP message is sent.
For convenience of explanation corresponding to the method described in fig. 1, the execution subject of the method shown in fig. 2 is the first selected aggregation network device.
S32: inquiring the source IP address in the setting table, and if the source IP address is found in the setting table, executing S33; if the source IP address is not found in the setting table, S34 is executed.
S33: returning a response message carrying the result of the search, the source IP address and the source MAC address so that the second access network equipment suspends the ARP message sent by the receiving terminal within the set time length; sending a detection message carrying a source IP address and a first MAC address included in a first table item of the source IP address to first access network equipment corresponding to a first equipment identifier included in the first table item in a setting table, so that the first access network equipment initiates ARP detection based on the source IP address and the first MAC address, if an ARP response is not received, deleting a third ARP table item including the source IP address and the first MAC address from an ARP table of the first access network equipment, and returning a deletion notice carrying the source IP address and the first MAC address; deleting a first entry in the settings table based on the deletion advertisement.
If the source IP address is found in the setting table, it indicates that the query message corresponding to the source IP address has been received before, that is, the source IP address has been used before, on one hand, a response message carrying the result of the query message, the source IP address and the source MAC address, is returned, and the second access network device suspends receiving the ARP message sent by the terminal within a set time duration, on the other hand, a detection message carrying the source IP address and the MAC address (which may be defined as the first MAC address) included in the first entry is sent to the access network device (which may be defined as the first access network device) corresponding to the device identifier (which may be defined as the first device identifier) included in the entry (which may be defined as the first entry) where the source IP address is located in the setting table, so that the first access network device initiates ARP detection, specifically, the first MAC address may be used as the destination MAC address, and the source IP address is carried in the ARP detection message, therefore, ARP detection is realized, because a unicast message is sent, if a corresponding terminal receives the message, an ARP response is sent, if the first access network equipment does not receive the ARP response, the first access network equipment indicates that the corresponding terminal is offline, ARP table items (which can be defined as a third ARP table item) comprising a source IP address and a source MAC address are deleted from an ARP table, so that the ARP table items are timely deleted, a deletion notice carrying the source IP address and the source MAC address is returned, and the first selected aggregation network equipment deletes the first table item from a setting table, so that the accuracy of the setting table is ensured; if the first access network device receives the ARP response, it indicates that the corresponding terminal is still online, and then the first access network device keeps the current state, and does not need to perform any operation.
S34: and establishing a second table item comprising the source IP address, the source MAC address and a second equipment identifier of the second access network equipment in the setting table, returning a response message carrying the source IP address and the source MAC address which are not found, and enabling the second access network equipment to add a first ARP table item comprising the source IP address and the source MAC address in an ARP table of the second access network equipment.
If the source IP address is not found in the setting table, it is indicated that the source IP address is not used currently, on one hand, an entry (which may be defined as a first entry) including the source IP address, the source MAC address, and a device identifier (which may be defined as a second device identifier) of an access network device (which may be defined as a second access network device) that sends an inquiry packet is established in the setting table, and on the other hand, a response packet carrying the result that the source IP address and the source MAC address are not found is returned, and the second access network device adds an entry (which may be defined as a first ARP entry) including the source IP address and the source MAC address in its ARP table.
In the scheme, after the access network equipment receives the ARP message sent by the terminal connected downstream, the access network equipment does not automatically learn the ARP table entries, but cooperates with the first selected aggregation network equipment in at least two aggregation network equipment to determine whether to add the ARP table entries or delete the ARP table entries, and does not delete the ARP table entries after the aging duration of the ARP table entries is expired, so that the deletion time of the ARP table entries can be shortened, the situation that the terminal on line cannot receive the message is avoided, the phenomena of packet loss and network disconnection of the terminal are avoided, and the user experience is greatly improved.
Optionally, the method further includes:
and if receiving a survival notice carrying the source IP address and the first MAC address sent by the first access network equipment after receiving the ARP response, reserving a first table entry in the setting table.
If receiving a survival notice carrying the source IP address and the first MAC address sent by the first access network equipment after receiving the ARP response, indicating that the source IP address is in use, reserving a first table entry in the setting table.
Based on the same inventive concept, an embodiment of the present invention provides an apparatus for updating an ARP table, which corresponds to the method shown in fig. 2, and is applied to at least two access network devices included in a three-tier to edge network, where the three-tier to edge network further includes at least two aggregation network devices, and the at least two aggregation network devices share a setting table and are respectively connected to the at least two access network devices, and a structure of the apparatus is shown in fig. 4, and includes:
a forwarding module 41, configured to send an inquiry message carrying a source IP address and a source MAC address of an ARP message to a first selected aggregation network device of the at least two aggregation network devices after receiving the ARP message sent by the downstream terminal, such that the first selected converged network device looks up the source IP address in the profile, and if the source IP address is found in the profile, returning a response message with the carrying result of the searched source IP address and the source MAC address, sending a detection message carrying the source IP address and the first MAC address included in the first table item to the first access network equipment corresponding to the first equipment identifier included in the first table item of the source IP address in the setting table, if the source IP address is not searched in the setting table, returning a response message carrying the source IP address and the source MAC address which are not found in the result, and establishing a second table item comprising the source IP address, the source MAC address and a second equipment identifier of second access network equipment for sending the query message in the setting table;
an adding module 42, configured to add a first ARP entry including the source IP address and the source MAC address to the ARP table if a response packet with a result that the source IP address and the source MAC address are not found is received;
the processing module 43 is configured to initiate ARP detection based on the first IP address and the second MAC address if a detection message carrying the first IP address and the second MAC address and sent by a second selected aggregation network device of the at least two network aggregation devices is received, delete a second ARP entry including the first IP address and the second MAC address from the ARP table if an ARP response is not received, and send a deletion notification carrying the first IP address and the second MAC address to the second selected aggregation network device, so that the second selected aggregation network device deletes a third entry including the first IP address and the second MAC address from the setting table.
In the scheme, after the access network equipment receives the ARP message sent by the terminal connected downstream, the access network equipment does not automatically learn the ARP table entries, but cooperates with the first selected aggregation network equipment in at least two aggregation network equipment to determine whether to add the ARP table entries or delete the ARP table entries, and does not delete the ARP table entries after the aging duration of the ARP table entries is expired, so that the deletion time of the ARP table entries can be shortened, the situation that the terminal on line cannot receive the message is avoided, the phenomena of packet loss and network disconnection of the terminal are avoided, and the user experience is greatly improved.
Optionally, the system further comprises a pause module, configured to:
and if the received response message carrying the result of the search, the source IP address and the source MAC address is received, suspending the ARP message sent by the receiving terminal within the set time length.
Optionally, the system further includes an announcing module, configured to:
and if the ARP response is received, sending a survival notice carrying the first IP address and the second MAC address to the second selected aggregation network equipment so as to enable the second selected aggregation network equipment to keep a third table entry.
Based on the same inventive concept, an embodiment of the present invention provides an apparatus for updating an ARP table, which corresponds to the method shown in fig. 3, and is applied to at least two aggregation network devices included in a three-layer to edge network, where the three-layer to edge network further includes at least two access network devices, and the at least two aggregation network devices share a setting table and are respectively connected to the at least two access network devices, and a structure of the apparatus is shown in fig. 5, and includes:
a receiving module 51, configured to receive an inquiry packet carrying a source IP address and a source MAC address of an ARP packet, where the inquiry packet is sent by a second access network device of at least two access network devices after receiving the ARP packet sent by a downlink terminal;
a query module 52, configured to query the setting table for the source IP address;
the processing module 53 is configured to, if the source IP address is found in the setting table, return a response packet with a result of finding the source IP address and the source MAC address, so that the second access network device suspends receiving the ARP packet sent by the terminal within a set duration; sending a detection message carrying a source IP address and a first MAC address included in a first table item of the source IP address to first access network equipment corresponding to a first equipment identifier included in the first table item in a setting table, so that the first access network equipment initiates ARP detection based on the source IP address and the first MAC address, if an ARP response is not received, deleting a third ARP table item including the source IP address and the first MAC address from an ARP table of the first access network equipment, and returning a deletion notice carrying the source IP address and the first MAC address; deleting a first entry in the setting table based on the deletion announcement; if the source IP address is not found in the setting table, establishing a second table item comprising the source IP address, the source MAC address and a second equipment identifier of the second access network equipment in the setting table, and returning a response message carrying the result of not finding the source IP address and the source MAC address so that the second access network equipment adds a first ARP table item comprising the source IP address and the source MAC address in an ARP table of the second access network equipment.
In the scheme, after the access network equipment receives the ARP message sent by the terminal connected downstream, the access network equipment does not automatically learn the ARP table entries, but cooperates with the first selected aggregation network equipment in at least two aggregation network equipment to determine whether to add the ARP table entries or delete the ARP table entries, and does not delete the ARP table entries after the aging duration of the ARP table entries is expired, so that the deletion time of the ARP table entries can be shortened, the situation that the terminal on line cannot receive the message is avoided, the phenomena of packet loss and network disconnection of the terminal are avoided, and the user experience is greatly improved.
Optionally, the system further comprises a reservation module, configured to:
and if receiving a survival notice carrying the source IP address and the first MAC address sent by the first access network equipment after receiving the ARP response, reserving a first table entry in the setting table.
An electronic device is further provided in the embodiments of the present application, please refer to fig. 6, which includes a processor 610, a communication interface 620, a memory 630 and a communication bus 640, wherein the processor 610, the communication interface 620 and the memory 630 complete communication with each other through the communication bus 640.
A memory 630 for storing computer programs;
the processor 610 is configured to implement the method for updating the ARP table according to any of the embodiments described above when executing the program stored in the memory 630.
The communication interface 620 is used for communication between the above-described electronic device and other devices.
The Memory may include a Random Access Memory (RAM) or a Non-Volatile Memory (NVM), such as at least one disk Memory. Optionally, the memory may also be at least one memory device located remotely from the processor.
The Processor may be a general-purpose Processor, including a Central Processing Unit (CPU), a Network Processor (NP), and the like; but also Digital Signal Processors (DSPs), Application Specific Integrated Circuits (ASICs), Field Programmable Gate Arrays (FPGAs) or other Programmable logic devices, discrete Gate or transistor logic devices, discrete hardware components.
In the scheme, after the access network equipment receives the ARP message sent by the terminal connected downstream, the access network equipment does not automatically learn the ARP table entries, but cooperates with the first selected aggregation network equipment in at least two aggregation network equipment to determine whether to add the ARP table entries or delete the ARP table entries, and does not delete the ARP table entries after the aging duration of the ARP table entries is expired, so that the deletion time of the ARP table entries can be shortened, the situation that the terminal on line cannot receive the message is avoided, the phenomena of packet loss and network disconnection of the terminal are avoided, and the user experience is greatly improved.
Accordingly, an embodiment of the present application further provides a computer-readable storage medium, in which instructions are stored, and when the computer-readable storage medium runs on a computer, the computer is caused to execute the method for updating an ARP table in any one of the above embodiments.
In the scheme, after the access network equipment receives the ARP message sent by the terminal connected downstream, the access network equipment does not automatically learn the ARP table entries, but cooperates with the first selected aggregation network equipment in at least two aggregation network equipment to determine whether to add the ARP table entries or delete the ARP table entries, and does not delete the ARP table entries after the aging duration of the ARP table entries is expired, so that the deletion time of the ARP table entries can be shortened, the situation that the terminal on line cannot receive the message is avoided, the phenomena of packet loss and network disconnection of the terminal are avoided, and the user experience is greatly improved.
The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
While alternative embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. It is therefore intended that the following appended claims be interpreted as including alternative embodiments and all such alterations and modifications as fall within the scope of the invention.
It will be apparent to those skilled in the art that various modifications and variations can be made in the embodiments of the present invention without departing from the spirit or scope of the embodiments of the invention. Thus, if such modifications and variations of the embodiments of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to encompass such modifications and variations.

Claims (12)

1. An updating method of an Address Resolution Protocol (ARP) table is applied to at least two access network devices included in a three-layer to edge network, the three-layer to edge network further includes at least two aggregation network devices, and the at least two aggregation network devices share a setting table and are respectively connected with the at least two access network devices, and the method is characterized by comprising the following steps:
after receiving an ARP message sent by a terminal connected downstream, sending a query message carrying a source Internet Protocol (IP) address and a source Media Access Control (MAC) address of the ARP message to a first selected aggregation network device of the at least two aggregation network devices so as to enable the first selected aggregation network device to query the source IP address in the setting table, if the source IP address is found in the setting table, returning a response message carrying the found source IP address and the source MAC address as a carrying result, and sending a detection message carrying the source IP address and the first MAC address included in the first table item corresponding to a first device identifier included in the first table item where the source IP address is located in the setting table, and if the source IP address is not found in the setting table, returning the first access network device carrying the source IP address and the first MAC address included in the first table item as a carrying result that the source IP address and the first MAC address are not found, The source IP address and the response message of the source MAC address, and a second table item comprising the source IP address, the source MAC address and a second device identifier of a second access network device which sends the query message are established in the setting table;
if a response message carrying a result that the source IP address and the source MAC address are not found is received, adding a first ARP table item comprising the source IP address and the source MAC address in an ARP table;
if a detection message which is sent by a second selected aggregation network device of the at least two network aggregation devices and carries a first IP address and a second MAC address is received, ARP detection is initiated based on the first IP address and the second MAC address, if an ARP response is not received, a second ARP table entry comprising the first IP address and the second MAC address is deleted from the ARP table, and a deletion notice carrying the first IP address and the second MAC address is sent to the second selected aggregation network device, so that the second selected aggregation network device deletes a third table entry comprising the first IP address and the second MAC address from the setting table.
2. The method of claim 1, further comprising:
and if receiving a response message carrying the result of finding the source IP address and the source MAC address, suspending receiving the ARP message sent by the terminal within a set time length.
3. The method of claim 1 or 2, further comprising:
and if an ARP response is received, sending a survival announcement carrying the first IP address and the second MAC address to the second selected aggregation network equipment so as to enable the second selected aggregation network equipment to reserve the third entry.
4. An updating method of an ARP table is applied to at least two aggregation network devices included in a three-layer to edge network, the three-layer to edge network further includes at least two access network devices, and the at least two aggregation network devices share a configuration table and are respectively connected with the at least two access network devices, and the method is characterized by comprising the following steps:
receiving an inquiry message carrying a source IP address and a source MAC address of an ARP message sent by a second access network device of the at least two access network devices after the second access network device receives the ARP message sent by a downlink terminal;
querying the source IP address in the profile;
if the source IP address is found in the setting table, returning a response message carrying the found source IP address and the source MAC address as a carrying result, so that the second access network equipment suspends receiving the ARP message sent by the terminal within a set time length; sending a detection message carrying the source IP address and a first MAC address included in a first table item of the source IP address to a first access network device corresponding to a first device identifier included in the first table item in the setting table, so that the first access network device initiates ARP detection based on the source IP address and the first MAC address, if an ARP response is not received, deleting a third ARP table item including the source IP address and the first MAC address from an ARP table of the first access network device, and returning a deletion notice carrying the source IP address and the first MAC address; deleting the first table entry in the setting table based on the deletion notification;
if the source IP address is not found in the setting table, establishing a second table entry comprising the source IP address, the source MAC address and a second device identifier of the second access network device in the setting table, and returning a response message carrying the source IP address and the source MAC address which are not found, so that the second access network device adds a first ARP table entry comprising the source IP address and the source MAC address in an ARP table of the second access network device.
5. The method of claim 4, further comprising:
if receiving a survival notice carrying the source IP address and the first MAC address sent by the first access network equipment after receiving the ARP response, reserving the first table entry in the setting table.
6. An updating device of ARP table is applied to at least two access network devices included by a three-layer to edge network, the three-layer to edge network further includes at least two aggregation network devices, the at least two aggregation network devices share a setting table and are respectively connected with the at least two access network devices, and the device is characterized by comprising:
a forwarding module, configured to send, after receiving an ARP packet sent by a downstream terminal, an inquiry packet carrying a source internet protocol IP address and a source media access control MAC address of the ARP packet to a first selected aggregation network device of the at least two aggregation network devices, so that the first selected aggregation network device inquires the source IP address in the setting table, if the source IP address is found in the setting table, return a response packet carrying a result of the inquiry, the source IP address and the source MAC address, and send, to a first access network device corresponding to a first device identifier included in a first entry where the source IP address is located in the setting table, a detection packet carrying the source IP address and a first MAC address included in the first entry, and if the source IP address is not found in the setting table, return a carrying result of the inquiry that the source IP address and the first MAC address included in the first entry are not found, The source IP address and the response message of the source MAC address, and a second table item comprising the source IP address, the source MAC address and a second device identifier of a second access network device which sends the query message are established in the setting table;
an adding module, configured to add a first ARP entry including the source IP address and the source MAC address to an ARP table if a response packet with a result that the source IP address and the source MAC address are not found is received;
a processing module, configured to initiate an ARP detection based on a first IP address and a second MAC address if a detection message carrying the first IP address and the second MAC address is received from a second selected aggregation network device of the at least two network aggregation devices, delete a second ARP entry including the first IP address and the second MAC address from the ARP table if an ARP response is not received, and send a deletion notification carrying the first IP address and the second MAC address to the second selected aggregation network device, so that the second selected aggregation network device deletes a third entry including the first IP address and the second MAC address from the setting table.
7. The apparatus of claim 6, further comprising a pause module to:
and if receiving a response message carrying the result of finding the source IP address and the source MAC address, suspending receiving the ARP message sent by the terminal within a set time length.
8. The apparatus of claim 6 or 7, further comprising an advertising module to:
and if an ARP response is received, sending a survival announcement carrying the first IP address and the second MAC address to the second selected aggregation network equipment so as to enable the second selected aggregation network equipment to reserve the third entry.
9. An updating device of ARP table is applied to at least two convergence network devices which are included by a three-layer to edge network, the three-layer to edge network further comprises at least two access network devices, the at least two convergence network devices share a setting table and are respectively connected with the at least two access network devices, and the device is characterized by comprising:
the receiving module is used for receiving an inquiry message which is sent by a second access network device of the at least two access network devices after receiving an ARP message sent by a downlink terminal and carries a source IP address and a source MAC address of the ARP message;
the query module is used for querying the source IP address in the setting table;
the processing module is used for returning a response message carrying the searched result, the source IP address and the source MAC address if the source IP address is searched in the setting table, so that the second access network equipment suspends receiving the ARP message sent by the terminal within a set time length; sending a detection message carrying the source IP address and a first MAC address included in a first table item of the source IP address to a first access network device corresponding to a first device identifier included in the first table item in the setting table, so that the first access network device initiates ARP detection based on the source IP address and the first MAC address, if an ARP response is not received, deleting a third ARP table item including the source IP address and the first MAC address from an ARP table of the first access network device, and returning a deletion notice carrying the source IP address and the first MAC address; deleting the first table entry in the setting table based on the deletion notification; if the source IP address is not found in the setting table, establishing a second table entry comprising the source IP address, the source MAC address and a second device identifier of the second access network device in the setting table, and returning a response message carrying the source IP address and the source MAC address which are not found, so that the second access network device adds a first ARP table entry comprising the source IP address and the source MAC address in an ARP table of the second access network device.
10. The apparatus of claim 9, further comprising a reservation module to:
if receiving a survival notice carrying the source IP address and the first MAC address sent by the first access network equipment after receiving the ARP response, reserving the first table entry in the setting table.
11. An electronic device, characterized in that the electronic device comprises a processor, a communication interface, a memory and a communication bus, wherein the processor, the communication interface and the memory are communicated with each other through the communication bus;
a memory for storing a computer program;
a processor for implementing the method steps of any of claims 1-5 when executing a program stored on a memory.
12. A computer-readable storage medium, characterized in that a computer program is stored in the computer-readable storage medium, which computer program, when being executed by a processor, carries out the method steps of any one of the claims 1-5.
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