CN108574648A - A kind of industrial ethernet switch - Google Patents
A kind of industrial ethernet switch Download PDFInfo
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- CN108574648A CN108574648A CN201810160623.3A CN201810160623A CN108574648A CN 108574648 A CN108574648 A CN 108574648A CN 201810160623 A CN201810160623 A CN 201810160623A CN 108574648 A CN108574648 A CN 108574648A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L49/00—Packet switching elements
- H04L49/35—Switches specially adapted for specific applications
- H04L49/351—Switches specially adapted for specific applications for local area network [LAN], e.g. Ethernet switches
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
- H04L12/42—Loop networks
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
- H04L12/42—Loop networks
- H04L12/437—Ring fault isolation or reconfiguration
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
- H04L12/46—Interconnection of networks
- H04L12/4641—Virtual LANs, VLANs, e.g. virtual private networks [VPN]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L45/00—Routing or path finding of packets in data switching networks
- H04L45/02—Topology update or discovery
- H04L45/026—Details of "hello" or keep-alive messages
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L45/00—Routing or path finding of packets in data switching networks
- H04L45/18—Loop-free operations
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L49/00—Packet switching elements
- H04L49/10—Packet switching elements characterised by the switching fabric construction
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L49/00—Packet switching elements
- H04L49/15—Interconnection of switching modules
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L49/00—Packet switching elements
- H04L49/30—Peripheral units, e.g. input or output ports
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L49/00—Packet switching elements
- H04L49/35—Switches specially adapted for specific applications
- H04L49/354—Switches specially adapted for specific applications for supporting virtual local area networks [VLAN]
Abstract
The invention discloses a kind of industrial ethernet switchs; include the domains MRPP for identifying the topological range limit that MRPP agreements are calculated and controlled; the domains MRPP are made of MRPP rings, protection VLAN, control VLAN, host node, transmission node, Edge node and assistant edge node; the MRPP functions of three-tier switch of the present invention can prevent broadcast storm caused by data loopback from occurring when Ethernet is polycyclic complete, and can be rapidly switched to backup link when a link on Ethernet ring disconnects to ensure that network continues to be connected to.It is compared with stp spanning-tree protocol, MRPP agreements have the following advantages：1, the network topological convergence time is short, speed is fast（Less than 100ms）；2, convergence time is unrelated with the number of nodes on ring-network topology；3, tangent rings, intersecting ring and multilayer loop are supported；4, the single domains MRPP and multiple domains MRPP are supported；5, multiple domain looped network flow load sharing is supported.
Description
Technical field
The present invention relates to a kind of interchanger, specifically a kind of industrial ethernet switch.
Background technology
At present in the network planning and practical networking application, it is more be using interchanger Ring network technologies come provide height with
Net very much the reliability of transmission.Interchanger Ring network technologies are exactly to connect some interchangers by the shape of physical rings in simple terms
To together, realizing a kind of technology being in communication with each other.
In order to avoid generating broadcast storm in looped network, regular traffic communication is influenced, original adoption is by commonly used
STP Spanning-Tree Protocol loop prevention mechanisms.But in practical application, since the convergence time of stp spanning-tree protocol is by network topology
Be affected, in network topology in larger and more complex environment, convergence time is longer, communication restore it is slower, usually not
It can meet to the higher requirement of transmission quality requirements.
Invention content
The purpose of the present invention is to provide a kind of industrial ethernet switchs, to solve mentioned above in the background art ask
Topic.
To achieve the above object, the present invention provides the following technical solutions：
A kind of industrial ethernet switch includes the topological range limit for calculating and controlling for identifying MRPP agreements
The domains MRPP, the domains MRPP are by MRPP rings, protection VLAN, control VLAN, host node, transmission node, fringe node and auxiliary side
Edge node forms.
Further technical solution as the present invention：Each MRPP ring corresponds to the Ethernet of a physically annular connection
Topology, MRPP rings are equally identified by the ID of integer representation, and each MRPP rings are a units in the domains MRPP where it,
MRPP agreements are to carry out topological calculating by MRPP rings.
Further technical solution as the present invention：Include the ports MRPP or the non-ports MRPP in the protection VLAN, protects
The forwarding state for protecting VLAN is controlled by the domains MRPP corresponding to it, the different protection of different MRPP configuration of territories on same looped network
VLAN, each domains MRPP independently calculate the forwarding state of oneself ring upper port.
Further technical solution as the present invention：The control VLAN includes being used for transmission main ring topology protocol message
The main control VLAN and son control VLAN for being used for transmission subring topology protocol message.
Further technical solution as the present invention：Each equipment is referred to as a MRPP node on Ethernet ring, often
Have on a MRPP rings and only there are one host nodes, host node is the promoter of looped network state active detecting mechanism, and detection
The policymaker of operation is executed after to MRPP ring failures.
Further technical solution as the present invention：All other node on MRPP rings in addition to host node is transmission section
Point, is responsible for the HELLO messages of transparent transmission host node, and monitors the state of the direct-connected RRPP links of oneself, and link DOWN events are led to
Know host node.
Further technical solution as the present invention：The Edge node and assistant edge node is subring and master respectively
Two equipment of point of intersection when ring intersects.
Further technical solution as the present invention：The ID of the domains the MRPP integer representation is identified.
Compared with prior art, the beneficial effects of the invention are as follows：The MRPP functions of three-tier switch of the present invention can be in ether
It can prevent broadcast storm caused by data loopback from occurring when netting polycyclic complete, and when a link on Ethernet ring disconnects
When can be rapidly switched to backup link to ensure that network continues to be connected to.It is compared with stp spanning-tree protocol, MRPP agreements have following excellent
Point：1, the network topological convergence time is short, speed is fast (being less than 100ms)；2, convergence time is unrelated with the number of nodes on ring-network topology；
3, tangent rings, intersecting ring and multilayer loop are supported；4, the single domains MRPP and multiple domains MRPP are supported；5, support that multiple domain looped network flow is negative
Load is shared.
Description of the drawings
Fig. 1 is MRPT status checkout mechanism flow charts.
Specific implementation mode
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation describes, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
Referring to Fig. 1, a kind of industrial ethernet switch, includes the topology for calculating and controlling for identifying MRPP agreements
The domains MRPP of range limit, the ID of the domains MRPP integer representation are identified, by MRPP rings, protection VLAN, control VLAN, main section
A few element compositions of point, transmission node, fringe node, assistant edge node.
Identical domain ID, protection VLAN and control VLAN, and interconnected device populations are only configured with, are just constituted
One RRPP domain.Same equipment supports multiple domains MRPP.
MRPP rings：Each MRPP ring corresponds to the ether net topology of a physically annular connection, and MRPP rings are equally by whole
The ID of expression is counted to identify.Each MRPP rings are a units in the domains MRPP where it.Actually MRPP agreements be by
MRPP rings carry out topological calculating.
Three kinds of common network construction forms of annular physical topology are：Monocycle, intersecting ring, tangent rings.Each network construction form divides
The scheme in the domains MRPP is different：
1, all devices in monocycle will configure in the identical domains MRPP；
2, all devices in intersecting ring will also configure in the identical domains MRPP；
3, two tangent rings, the equipment on each ring will configure in the identical domains MRPP, i.e., tangent rings are equivalent to two
A monocycle, needs to configure two domains MRPP, and only there are one rings in each domains MRPP.In the domains MRPP for having intersecting ring networking in order to
The topology of each ring, which calculates, not to be interfered with each other, and loop do not occur in all rings, needs to distinguish one to be main ring, other rings are
Subring.Main ring can be abstracted a logical node for regarding subring as a whole, and the protocol massages of subring pass through main ring
The topology of transparent transmission, the big ring that can be formed to two intersecting rings calculates；The protocol massages of main ring only in main ring internal communication,
Do not enter subring.The rank specified when main ring and subring are by configuring identifies, and the rank of main ring is configured to 0, the rank of subring
It is configured to 1.
Protect VLAN：Protection VLAN is the VLAN for transmitting data message.It can includes the ports MRPP to protect in VLAN,
Can also include the non-ports MRPP.The forwarding state of VLAN is protected to be controlled by the domains MRPP corresponding to it.It is different on same looped network
The different protection VLAN of MRPP configuration of territories, each domains MRPP independently calculate the forwarding state of oneself ring upper port.
Control VLAN：Control VLAN is the VLAN for transmitting MRPP protocol massages.In order to support the intersecting ring of boss's ring
Networking, each domains MRPP are respectively used to transmission main ring and subring equipped with two control VLAN of main control VLAN and son control VLAN
Topology protocol message.Specified main control VLAN is only needed when configuration, and agreement is automatically bigger by 1 than the ID values of main control VLAN
VLAN as son control VLAN.Main ring protocol massages and subring EDGE-HELLO messages are propagated in main control VLAN, other
Sub-loop protocol message propagated in sub- control VLAN.The port of access MRPP rings belongs to control VLAN in each equipment, and
Also control VLAN can be added in the port only on access MRPP rings.
Host node：Each equipment is referred to as a MRPP node on Ethernet ring, on each MRPP rings must there are one
Main section
Point, and can only there are one.Host node is the promoter of looped network state active detecting mechanism, and detects MRPP
The policymaker of operation is executed after ring failure.
Host node has following two states：
1, Completed State (convergence success status)
When link all on looped network is all in UP states, host node can receive the HELLO of oneself transmission from secondary port
Message just says that host node is in Completed states, and host node can block secondary port to prevent data message from being opened up in annular at this time
Flutter formation broadcast loops.
2, Failed State (malfunction)
When there is link to be in malfunction on looped network, host node is in Failed states, at this time the secondary port of host node
The obstruction to data message is decontroled, is not interrupted with the communication ensured on looped network.
Transmission node：All other node on MRPP rings in addition to host node is transmission node, is responsible for transparent transmission host node
HELLO messages, and the state of the direct-connected RRPP links of oneself is monitored, link DOWN events are notified host node.
Transmission node has following three state：
1, Link-Up State (UP states)
When the Primary port and secondary port of transmission node is all in UP states, just say that transmission node is in Link-Up states.
2, Link-Down State (Down states)
When the master port of transmission node or secondary port are in Down states, just say that transmission node is in Link-Down states.
3, Pre-Forwarding State (interim blocked state)
When the master port of transmission node or secondary port are in blocked state, just say that transmission node is in Pre-Forwarding
State.
Edge node and assistant edge node：There are two intersection point, the equipment of the two point of intersection when subring and main ring intersect
One of them is called fringe node, another is called assistant edge node.Fringe node must be pairs of with assistant edge node
Configuration.Which platform device configuration do not had particular/special requirement at fringe node or assistant edge node, as long as two can be distinguished in configuration
Node is just.Fringe node or assistant edge node are role of the equipment in subring, are saved based on the role on main ring
Point or transmission node.
Edge node and assistant edge node is all special transmission node, therefore has 3 kinds identical with transmission node
State, but definition is slightly different, it is specific as follows：
1, Link-Up State (UP states)
When edge port is in UP states, just say that fringe node (assistant edge node) is in Link-Up states.
2, Link-Down State (Down states)
When edge port is in Down states, just say that fringe node (assistant edge node) is in Link-Down states.
3, Pre-Forwarding State (interim blocked state)
When edge port is in blocked state, just say that fringe node (assistant edge node) is in Pre-Forwarding shapes
State.
Primary port and secondary port：In two ports of host node and transmission node access network based on ethernet ring, one is master port,
Another is secondary port, and the role of port is determined by the configuration of user.
The Primary port and secondary port of host node is functionally distinguishing.Host node sends HELLO reports from its master port
Text, if it is possible to receive the message from secondary port, illustrate that RRPP ring net where this node is complete, it is therefore desirable to the secondary port of obstruction with
Prevent data loopback；If can not receive the message at the appointed time on the contrary, illustrate ring network fault, needs to decontrol secondary port at this time
To ensure the normal communication of all nodes on ring.The Primary port and secondary port of transmission node is functionally not different.Port
Role is equally determined by the configuration of user.
Common port and edge port：The port that fringe node (assistant edge node) accesses subring is edge port, is connect
Two ports for entering main ring are public port, the chain on fringe node on public port and assistant edge node between public port
Road is referred to as common link.The role of common port and edge port is determined by the configuration of user.Agreement in design will be entire
Main ring regards a logical node in subring as, to which common link is regarded as the inner link of this node of main ring, chain
The state change on road only notifies that main ring host node is handled.
MRPT：Refer under multi-ring network topological environmental, the physical channel of the protocol massages of subring in main ring.
The present invention operation principle be：
The basic principle of polycyclic state testing mechanism：
MRPP agreements will distinguish main ring and subring under polycyclic topology, and Ring1 is arranged to main ring in Fig. 1, Ring2
345 be subring.Subring regards main ring as a logical node, the protocol massages of the subring transparent transmission (EDGE_ on main ring
Except HELLO messages).The fringe node of all subrings is necessarily placed in same equipment, and assistant edge node must also be set
Set in another identical equipment, i.e., in figure S2 be Ring2 345 fringe node, S3 be Ring2 345 auxiliary side
Edge node.
Each subring has two MRPT, i.e. message channel on main ring, i.e., is S2-S3 and S2-S1-S4- in figure respectively
S3.When main ring is complete, host node pair port is in blocked state, and only S2-S3 is logical.When main ring breaks down, such as
Fruit failure is happened on S2-S1-S4-S3, then S2-S3 is logical；If failure is happened on S2-S3, S2-S1-S4-S3
It is logical；Therefore, at any time, in 2 MRPT of subring, at most only 1 is logical, avoids subring agreement in this way
Message forms data loopback in main ring, and subring can obtain maximum communication path, and will not form loop.
But if after two MRPT of main ring are all off, at this time between each subring, and multiple subrings can be formed
Between looped network, such as the S2-S6-S3-S7- between S2-S5-S3-S6-S2, Ring3 and Ring4 between the Ring2 and Ring3 in figure
Nested looped network between subring and subring similar S2-S7-S3-S8-S2 between S2, Ring4 and Ring5 etc., this will be attracted
The defect of new broadcast storm devises MRPT status checkout mechanism to eliminate this defect.
The course of work of MRPT status checkout mechanism：
1, MPRT trouble shootings.The subring of only domain ID and RingID minimums, its fringe node is by connecting the two of main ring
A port periodically sends EDGE-HELLO messages into main ring, assistant edge node is ultimately destined for, if assistant edge node
EDGE-HELLO messages are received within the scheduled time, show an at least MRPT in main ring, it is on the contrary then show own in main ring
MRPT is all off.
2, MRPT post-faults.After detecting that MRPT is all off, assistant edge node is immediately to the edge of subring
Node sends MASTER-DOWN messages.If fault-free in subring, fringe node will receive MASTER-DOWN messages, then immediately
Block the edge port of fringe node.Since MASTER-DOWN messages are periodicity sendings, if fringe node is when defined
It is interior to can not receive the message, then edge port is opened.The host node of each subring opens secondary port, and is in Failed
State；
MRPT restores post-processing.If the MRPT of main ring troubleshooting, subnet just restores, then the assistant edge section of subring
Point does not retransmit MASTER-DOWN messages.If meanwhile the host node of subnet can also receive the HELLO messages oneself sent out, then
Judge then to block auxiliary port immediately there are physics looped network in domain, switches to Completed states, and send COMPLETED
Message, fringe node remove MAC and ARP entry, and edge port is opened after receiving COMPLETED messages, looped network convergence
Success, network communication restore normal.
It is obvious to a person skilled in the art that invention is not limited to the details of the above exemplary embodiments, Er Qie
In the case of without departing substantially from spirit or essential attributes of the invention, the present invention can be realized in other specific forms.Therefore, no matter
From the point of view of which point, the present embodiments are to be considered as illustrative and not restrictive, and the scope of the present invention is by appended power
Profit requires rather than above description limits, it is intended that all by what is fallen within the meaning and scope of the equivalent requirements of the claims
Variation is included within the present invention.Any reference signs in the claims should not be construed as limiting the involved claims.
In addition, it should be understood that although this specification is described in terms of embodiments, but not each embodiment is only wrapped
Containing an independent technical solution, this description of the specification is merely for the sake of clarity, and those skilled in the art should
It considers the specification as a whole, the technical solutions in the various embodiments may also be suitably combined, forms those skilled in the art
The other embodiment being appreciated that.
Claims (8)
1. a kind of industrial ethernet switch includes the topological range limit for calculating and controlling for identifying MRPP agreements
The domains MRPP, which is characterized in that the domains MRPP are by MRPP rings, protection VLAN, control VLAN, host node, transmission node, edge section
Point and assistant edge node composition.
2. industrial ethernet switch according to claim 1, which is characterized in that each MRPP ring corresponds to a physics
The ether net topology of upper annular connection, MRPP rings equally identify by the ID of integer representation, where each MRPP rings are it
One unit in the domains MRPP, MRPP agreements are to carry out topological calculating by MRPP rings.
3. industrial ethernet switch according to claim 1, which is characterized in that include the ends MRPP in the protection VLAN
Mouth or the non-ports MRPP protect the forwarding state of VLAN to be controlled by the domains MRPP corresponding to it, different MRPP on same looped network
The different protection VLAN of configuration of territory, each domains MRPP independently calculate the forwarding state of oneself ring upper port.
4. industrial ethernet switch according to claim 1, which is characterized in that the control VLAN includes being used for transmission
The main control VLAN of the main ring topology protocol message and son control VLAN for being used for transmission subring topology protocol message.
5. industrial ethernet switch according to claim 1, which is characterized in that each equipment all claims on Ethernet ring
For a MRPP node, has on each MRPP rings and only there are one host nodes, host node is looped network state active detecting mechanism
Promoter, and detect the policymaker that operation is executed after MRPP ring failures.
6. industrial ethernet switch according to claim 1, which is characterized in that all in addition to host node on MRPP rings
Other nodes are transmission nodes, are responsible for the HELLO messages of transparent transmission host node, and monitor the state of the direct-connected RRPP links of oneself,
Link DOWN events are notified host node.
7. industrial ethernet switch according to claim 1, which is characterized in that the fringe node and assistant edge section
Point is two equipment of point of intersection when subring and main ring are intersected respectively.
8. industrial ethernet switch according to claim 1, which is characterized in that the ID of the domains MRPP integer representation
To identify.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111510315A (en) * | 2019-04-24 | 2020-08-07 | 上海自恒信息科技有限公司 | Ring network redundancy protocol based on proprietary switching chip network pipe type industrial switch |
| CN111526078A (en) * | 2019-06-26 | 2020-08-11 | 上海自恒信息科技有限公司 | Sub-ring network redundancy expansion protocol applied to diversified network topology |
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Application publication date: 20180925 |