CN114679427B - MAC address learning method and system based on HINOC system - Google Patents
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Abstract
The invention discloses a MAC address learning method and system based on an HINOC system, which belong to the technical field of switches and comprise the following steps: creating an address learning parameter set in the local side equipment, reading a source MAC address from an H interface, judging whether the source MAC address exists in an MAC address table, reading a destination MAC address from an E interface, and judging whether the destination MAC address is a unicast address: if not, entering a second learning mode; otherwise, judging whether the destination MAC address is a known unicast address: if yes, executing a second forwarding instruction; if not, completing the subsequent processing of the corresponding unicast message based on the learning forwarding strategy. The learning confirmation module in the local side equipment in the HINOC system classifies the destination MAC address and comprises judging whether the address is a newly added address or not and whether the address is a unicast address or not, so that the learning of the local side equipment on the invalid MAC address from an E interface is reduced, and the requirement of a network on the storage space of an HB equipment MAC address table is reduced.
Description
Technical Field
The invention belongs to the technical field of switches, and particularly relates to a MAC address learning method and system based on an HINOC system.
Background
As shown in fig. 1, the broadband access network mainly includes: user access devices, network convergence devices, BRAS (broadband access servers), AAA (authentication accounting servers), etc. The user access devices such as the HINOC terminal HM, the HINOC local side HB, and the like, and the network convergence devices such as the ONU and OLT supporting the EPON protocol, the ethernet core switch, and the like.
The user access device is used for realizing the user line tandem function, the network convergence device connects the user access device to the broadband access server, and the broadband access server terminates the user access link layer and cooperates with the authentication charging server to realize the access authentication and charging of the user. The user access device and the network convergence device work in a two-layer mode, only process the link layer information in the data message, and forward the data message according to the link layer address information.
In an actual network, a section of coaxial line may have both a high-frequency EOC access network based on the HINOC standard and a low-frequency EOC access network based on the HPAV standard, so that the same convergence interface is shared. If the convergence network is properly configured, the message broadcast domains of the two EOC access networks are not overlapped and are not mutually influenced; however, if the configuration is improper, the two EOC access networks have overlapped message broadcast domains, so that the MAC address learning of the local side device HB in the HINOC system and the normal HINOC system communication are affected.
Disclosure of Invention
The invention provides a MAC address learning method and a system based on an HINOC system for solving the technical problems in the background art, which improves the reliability of the HINOC access system and ensures that the MAC address learning of HB equipment is not influenced by an oversized message broadcast domain in a network after the HINOC access system is accessed to a converged network.
The invention adopts the following technical scheme: a MAC address learning method based on HINOC system includes the following steps:
creating an address learning parameter set in the local side equipment, wherein the address learning parameter set at least comprises: message interface, MAC address table, address aging time, and learning forwarding strategy;
reading a source MAC address from an H interface, and judging whether the source MAC address exists in a MAC address table or not: if yes, executing a first forwarding instruction, otherwise entering a first learning mode;
reading a destination MAC address from an E interface, and judging whether the destination MAC address is a unicast address or not: if not, entering a second learning mode; otherwise, judging whether the destination MAC address is a known unicast address: if yes, executing a second forwarding instruction; if not, completing the subsequent processing of the corresponding unicast message based on the learning forwarding strategy.
By adopting the technical scheme, when the HB device MAC address learning triggering module receives the data message of the E interface, the HB device cannot learn and record the source MAC address from the E interface message, so that the MAC address table space of the HB device is saved.
In a further embodiment, the method further comprises the steps of:
if the destination MAC address is a broadcast or multicast address, the corresponding message is directly broadcast to each H interface of the terminal equipment, and the destination MAC address is added into an MAC address table.
In a further embodiment, the execution flow of the first forwarding instruction is as follows:
when the source MAC address exists in the MAC address table, the corresponding message is directly forwarded to an E interface, and meanwhile, the address aging time corresponding to the address learning parameter set is updated.
In a further embodiment, the learning process of the first learning mode is as follows:
and when the source MAC address does not exist in the MAC address table, adding the source MAC address into a temporary MAC address linked list, and forwarding a corresponding message to an E interface.
In a further embodiment, the learning procedure of the second learning mode is as follows:
when the destination MAC address is not a unicast address, the destination MAC address, a message interface corresponding to the destination MAC address and the address aging time are newly added into an address learning parameter set.
In a further embodiment, the execution flow of the second forwarding instruction is as follows:
if the target MAC address exists in the MAC address table, the corresponding message is directly forwarded to the network convergence device, and the corresponding address aging time in the address learning parameter set is updated;
if the destination MAC address exists in the temporary MAC address linked list, the corresponding message is directly forwarded to the network convergence device, and the destination MAC address is added into the MAC address table.
In a further embodiment, the learning forwarding strategy includes at least: a "D" policy and a "F" policy.
In a further embodiment, if the current learning forwarding policy is set to a "D" policy, the unicast message corresponding to the unknown unicast address is directly discarded;
and if the current learning forwarding strategy is set to be an 'F' strategy, broadcasting the unicast message corresponding to the unknown unicast address to each H interface of the terminal equipment.
A MAC address learning system for implementing the HINOC-based system as described above, comprising: the learning system comprises a learning parameter storage module, a learning triggering module and a learning confirmation module;
the learning parameter storage module is configured to create and store an address learning parameter set in the local side device, where the address learning parameter set at least includes: message interface, MAC address table, address aging time, and learning forwarding strategy;
the learning triggering module is configured to read a source MAC address from the H interface, and determine whether the source MAC address exists in a MAC address table: if yes, executing a first forwarding instruction, otherwise entering a first learning mode;
the learning validation module is configured to read a destination MAC address from the E interface, and determine whether the destination MAC address is a unicast address: if not, entering a second learning mode; otherwise, judging whether the destination MAC address is a known unicast address: if yes, executing a second forwarding instruction; if not, completing the subsequent processing of the corresponding unicast message based on the learning forwarding strategy.
In a further embodiment, the MAC address table includes at least: dynamic MAC addresses and static MAC addresses;
the learning forwarding strategy is preset and at least comprises the following steps: a "D" policy and a "F" policy.
The invention has the beneficial effects that: the invention sets a learning parameter storage module in the local side setting, stores: the message interface, the MAC address table, the address aging time and the learning and forwarding strategy about unknown unicast messages enable a learning and confirming module in local side equipment in the HINOC system to classify target MAC addresses, including judging whether the target MAC addresses are newly added addresses or unicast addresses, so that learning of invalid MAC addresses from an E interface by the local side equipment is reduced, the requirement of a network on the storage space of the MAC address table of HB equipment (local side equipment) is reduced, the HB equipment can access more users, and the networking construction cost of the user access network is reduced.
Drawings
Fig. 1 is a block diagram of a prior art HINOC high performance coaxial broadband access network.
Fig. 2 is a diagram showing the MAC address learning relationship connection of the present invention.
Detailed Description
The invention is further described below with reference to examples and figures of the specification.
Example 1
In order to improve the reliability of the HINOC access system and ensure that the MAC address learning of the HB device is not affected by the oversized message broadcast domain in the network after accessing the converged network, a MAC address learning mechanism as shown in fig. 2 is provided, which specifically includes the following steps:
in HINOC system, user access network MAC address table and local side equipment create address learning parameter set for maintaining network MAC address table. Wherein the address learning parameter set includes at least: message interface, MAC address table, address aging time, and learning forwarding strategy.
In this embodiment, the MAC address table is a table for recording the relationship between the ue and the corresponding interface, and the office device (HB) is responsible for transmitting the data frame to the specified ue according to this table. The message interface of HB equipment includes E mouth and H mouth, wherein E mouth is the interface of linking up and is connected with the convergence equipment, and H mouth is the interface of linking down and is connected with user access terminal. The number of E ports is one, and the number of H ports is a plurality.
The MAC address table in HB contains dynamic MAC addresses and static MAC addresses. The address aging time corresponding to this is confirmed as follows:
dynamic MAC address: the interface obtains through the source MAC address learning in the message, the table item can be aged, the default aging time exists, the aging time is modified through the command, and the learned dynamic MAC address can be cleared after the aging time is up.
Static MAC address: the user manually configures the interface, the MAC address is statically bound, and the message of the MAC address is discarded when other interfaces receive the source MAC, but the learning of the dynamic MAC address table item of the interface is not affected after one interface is statically bound with the MAC address.
When the network operates normally, the access path of the user accessed by the access device HM1 is: HM 1- & gt H interface of HB 1- & gt E interface of HB 1- & gt interface of convergence device ONU 1- & gt broadband server BRAS; the access path of the user accessed by the access device HM2 is: HM 2- & gtH interface of HB 1- & gtE interface of HB 1- & gtinterface of convergence device ONU 1- & gtbroadband server BRAS.
In general, the HB1 interface will learn the source MAC addresses of all interfaces (E interface and H interface) while modifying the MAC address table. Thus, when the HB1 needs to transmit the data message to the HM1, it needs to search the MAC address table according to the destination MAC address of the message, if the MAC address exists in the MAC address table, it determines the output interface corresponding to the data message according to the record, and forwards the message. If the address table of HB1 has no record of the MAC address, the message is broadcast and forwarded, namely, the message is copied for each H interface.
However, due to the aforementioned reason that the low frequency EOC access network shares the aggregation interface, the HB1 interface learns a large number of MAC addresses, including the user MAC address and the access network device MAC address, which puts a high demand on the MAC address table capacity of the HB1 device, but the access network device MAC address therein is meaningless. If the equipment with large capacity of the MAC address table is adopted, the cost investment is too high and has no practical significance; if the equipment with smaller capacity of the MAC address table is adopted, the phenomenon that part of user MAC addresses cannot be learned possibly occurs, so that a broadcast forwarding mode occurs, network bandwidth is wasted, and the running stability of the equipment is affected.
Therefore, in order to solve the above technical problems, the method for learning the MAC address based on the HINOC system further includes the following steps:
reading a source MAC address from an H interface, and judging whether the source MAC address exists in a MAC address table or not: if so, executing a first forwarding instruction, otherwise entering a first learning mode.
In a further embodiment, the execution flow of the first forwarding instruction is as follows: when the source MAC address exists in the MAC address table, the corresponding message is directly forwarded to an E interface, and meanwhile, the address aging time corresponding to the address learning parameter set is updated.
The learning flow of the first learning mode is as follows: and when the source MAC address does not exist in the MAC address table, adding the source MAC address into a temporary MAC address linked list, and forwarding a corresponding message to an E interface. The temporary MAC address linked list is introduced, and the later destination MAC address is combined to further judge whether to confirm learning, namely whether to add the source MAC address into the MAC address list, so that a certain filtering effect is achieved, the capacity of the MAC address list is effectively ensured, and the running stability of equipment is improved.
Reading a destination MAC address from an E interface, and judging whether the destination MAC address is a unicast address or not: if the destination MAC address is not a unicast address, entering a second learning mode; otherwise, if the destination MAC address is a unicast address, further determination needs to be made as to whether the destination address is a new address, in other words, whether the destination MAC address is a known unicast address: if the address is known (i.e. already present in the MAC address table or in the temporary MAC address linked list), executing the second forwarding instruction; if not (neither exists in the MAC address table nor the temporary MAC address linked list), the subsequent processing of the corresponding unicast message is completed based on the learning forwarding strategy.
In a further embodiment, the learning procedure of the second learning mode is as follows: when the destination MAC address is not a unicast address, the destination MAC address, a message interface corresponding to the destination MAC address and the address aging time are newly added into an address learning parameter set. The learning is directly confirmed.
The execution flow of the second forwarding instruction is as follows: if the target MAC address exists in the MAC address table, the corresponding message is directly forwarded to the network convergence device, and the address aging time corresponding to the address learning parameter set is updated.
If the destination MAC address exists in the temporary MAC address linked list, the corresponding message is directly forwarded to the network convergence device, and the destination MAC address is added into the MAC address table. In other words, it is determined that the above acknowledges learning for the newly added source MAC address. And the message interface and the address aging time corresponding to the destination MAC address are newly added into the address learning parameter set. The corresponding information in the address learning parameter set is directly confirmed and learned and updated, and the consistency among the information is maintained.
The above is to process the unicast message, that is, update or update, but when the unicast message is not known, it is necessary to determine the type of the learning forwarding policy set currently and then further process the unicast message.
In a further embodiment, learning the forwarding policy includes at least: a "D" policy and a "F" policy. In other words, if the current preset learning forwarding policy is the "D" policy, when the unknown unicast message is received, the following processing is performed: unicast messages corresponding to unknown unicast addresses are directly discarded.
Otherwise, if the current preset learning forwarding policy is an "F" policy, when the unknown unicast message is received, the following processing is performed: a unicast message corresponding to the unknown unicast address is broadcast to each H-interface of the terminal device.
In another embodiment, if the destination MAC address is a broadcast or multicast address, the corresponding message is directly broadcast to each H interface of the terminal device, and the destination MAC address is added to the MAC address table.
The embodiment causes the learning confirmation module in the local side equipment in the HINOC system to classify the destination MAC address, including judging whether the address is a newly added address or not and whether the address is a unicast address or not, thereby reducing the learning of the invalid MAC address from the E interface by the local side equipment, reducing the requirement of the network on the storage space of the HB equipment (local side equipment) MAC address table, enabling the HB equipment to access more users, and reducing the networking construction cost of the user access network.
Example 2
To implement the learning method described in embodiment 1, this embodiment discloses a MAC address learning system based on a HINOC system, including: the learning system comprises a learning parameter storage module, a learning triggering module and a learning confirmation module.
The learning parameter storage module is configured to create and store an address learning parameter set in the local side device, where the address learning parameter set at least includes: message interface, MAC address table, address aging time, and learning forwarding strategy.
The learning triggering module is configured to read a source MAC address from the H interface, and determine whether the source MAC address exists in the MAC address table: if yes, executing a first forwarding instruction, otherwise entering a first learning mode;
the learning validation module is configured to read a destination MAC address from the E interface, and determine whether the destination MAC address is a unicast address: if not, entering a second learning mode; otherwise, judging whether the destination MAC address is a known unicast address: if yes, executing a second forwarding instruction; if not, completing the subsequent processing of the corresponding unicast message based on the learning forwarding strategy.
In a further embodiment, when the address learning triggering module of the HB device receives the data packet of the E interface, the HB device does not learn and record the source MAC address of the packet from the E interface, thereby saving the MAC address table space of the HB device. Then, the address learning triggering module of the HB device can process the message to the address learning confirmation module of the HB device. The address learning and confirming module of HB equipment judges the destination MAC address in the message, and directly forwards the message in the MAC address table and updates the aging time; the message in the temporary MAC address linked list is directly forwarded and added into the MAC address table at the same time; for unknown unicast messages which do not appear in the MAC address table and the temporary MAC address linked list, if the processing and forwarding strategy of the unknown unicast messages in the MAC address learning parameter storage module is set to be D, the messages are directly discarded; if the unknown unicast message processing and forwarding strategy in the MAC address learning parameter storage module is set to be F, the message is directly broadcast to HM equipment on each H interface. For broadcast and multicast messages, the messages are directly broadcast to the HM device on each H interface, and broadcast or multicast addresses are recorded in the MAC address table.
Claims (7)
1. The MAC address learning method based on the HINOC system is characterized by comprising the following steps of:
creating an address learning parameter set in the local side equipment, wherein the address learning parameter set at least comprises: message interface, MAC address table, address aging time, and learning forwarding strategy;
reading a source MAC address from an H interface, and judging whether the source MAC address exists in a MAC address table or not: if yes, executing a first forwarding instruction, otherwise entering a first learning mode;
reading a destination MAC address from an E interface, and judging whether the destination MAC address is a unicast address or not: if not, entering a second learning mode; otherwise, judging whether the destination MAC address is a known unicast address: if yes, executing a second forwarding instruction; if not, completing the subsequent processing of the corresponding unicast message based on the learning forwarding strategy;
the learning flow of the first learning mode is as follows:
when the source MAC address does not exist in the MAC address table, the source MAC address is added into a temporary MAC address linked list, and a corresponding message is forwarded to an E interface;
the learning flow of the second learning mode is as follows:
when the destination MAC address is not a unicast address, the destination MAC address, a message interface corresponding to the destination MAC address and the address aging time are newly added into an address learning parameter set.
2. The method for learning a MAC address based on a HINOC system of claim 1, further comprising the steps of:
if the destination MAC address is a broadcast or multicast address, the corresponding message is directly broadcast to each H interface of the terminal equipment, and the destination MAC address is added into an MAC address table.
3. The MAC address learning method based on the HINOC system of claim 1, wherein the execution flow of the first forwarding instruction is as follows:
when the source MAC address exists in the MAC address table, the corresponding message is directly forwarded to an E interface, and meanwhile, the address aging time corresponding to the address learning parameter set is updated.
4. The MAC address learning method based on the HINOC system of claim 1, wherein the execution flow of the second forwarding instruction is as follows:
if the target MAC address exists in the MAC address table, the corresponding message is directly forwarded to the network convergence device, and the corresponding address aging time in the address learning parameter set is updated;
if the destination MAC address exists in the temporary MAC address linked list, the corresponding message is directly forwarded to the network convergence device, and the destination MAC address is added into the MAC address table.
5. The method for learning a MAC address based on a HINOC system as claimed in claim 1, wherein the learning forwarding policy includes at least: a "D" policy and an "F" policy;
if the current learning forwarding strategy is set as a 'D' strategy, directly discarding the unicast message corresponding to the unknown unicast address;
and if the current learning forwarding strategy is set to be an 'F' strategy, broadcasting the unicast message corresponding to the unknown unicast address to each H interface of the terminal equipment.
6. A MAC address learning system based on a HINOC system for implementing the method of any one of claims 1 to 5, comprising: the learning system comprises a learning parameter storage module, a learning triggering module and a learning confirmation module;
the learning parameter storage module is configured to create and store an address learning parameter set in the local side device, where the address learning parameter set at least includes: message interface, MAC address table, address aging time, and learning forwarding strategy;
the learning triggering module is configured to read a source MAC address from the H interface, and determine whether the source MAC address exists in a MAC address table: if yes, executing a first forwarding instruction, otherwise entering a first learning mode;
the learning validation module is configured to read a destination MAC address from the E interface, and determine whether the destination MAC address is a unicast address: if not, entering a second learning mode; otherwise, judging whether the destination MAC address is a known unicast address: if yes, executing a second forwarding instruction; if not, completing the subsequent processing of the corresponding unicast message based on the learning forwarding strategy.
7. The HINOC system based MAC address learning system of claim 6, wherein the MAC address table comprises at least: dynamic MAC addresses and static MAC addresses;
the learning forwarding strategy is preset and at least comprises the following steps: a "D" policy and an "F" policy;
if the current learning forwarding strategy is set as a 'D' strategy, directly discarding the unicast message corresponding to the unknown unicast address;
and if the current learning forwarding strategy is set to be an 'F' strategy, broadcasting the unicast message corresponding to the unknown unicast address to each H interface of the terminal equipment.
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CN101453401A (en) * | 2005-06-16 | 2009-06-10 | 华为技术有限公司 | Ethernet bridge equipment, MAC address learning method and data packet transmission method |
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