CN105915400A - Data stream switching method and system - Google Patents
Data stream switching method and system Download PDFInfo
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- CN105915400A CN105915400A CN201610495144.8A CN201610495144A CN105915400A CN 105915400 A CN105915400 A CN 105915400A CN 201610495144 A CN201610495144 A CN 201610495144A CN 105915400 A CN105915400 A CN 105915400A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L41/00—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
- H04L41/08—Configuration management of networks or network elements
- H04L41/0803—Configuration setting
- H04L41/0823—Configuration setting characterised by the purposes of a change of settings, e.g. optimising configuration for enhancing reliability
- H04L41/0836—Configuration setting characterised by the purposes of a change of settings, e.g. optimising configuration for enhancing reliability to enhance reliability, e.g. reduce downtime
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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
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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
- H04L45/22—Alternate routing
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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
- H04L45/38—Flow based routing
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- Computer Networks & Wireless Communication (AREA)
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Abstract
The invention discloses a data stream switching method and system. The method comprises the steps of: monitoring upstream and downstream links by utilizing a VRRP (Virtual Router Redundancy Protocol), triggering primary and standby states of first forwarding equipment and second forwarding equipment to be switched when primary and standby equipment switching conditions are met, and sending a free ARP (Address Resolution Protocol) notification message to a switch at a network side; deleting a first static route of a communication link between the first forwarding equipment and an upstream router, and generating a second static route of the communication link between the second forwarding equipment and the upstream router; and updating forwarding information of the switch according to the free ARP notification message sent to the switch at the network side by the second forwarding equipment, redistributing information of a connected route and the second static route to the upstream router so as to enable the router to recalculate a routing table of an optimal link path, and according to the routing table obtained by calculation, switching a flow direction of data stream of the upstream router so as to solve the problem of a flow direction error of the data after primary and standby switching in the prior art.
Description
Technical field
The present invention relates to network safety filed, particularly relate to a kind of data stream switching method and system.
Background technology
Along with transmission control protocol/Internet Protocol (TCP/IP, Transmission Control
Protocol/Internet Protocol) the extensive application of network, more and more higher to the requirement in terms of network reliability.
Wherein in the base network device such as router and/or switch, it is provided with fire wall, it is achieved network and safeguard protection
Very high integrity, be the most increasingly widely applied.
Wherein, use fire wall concrete such as the reliability networking plan of LAN server safeguard protection
Shown in Fig. 1, first, comprising switch in the network in the downstream of fire wall, two network equipments are by virtual
Route redundancy protocol (VRRP, Virtual Router Redundancy Protocol) forms a virtual flow-line
Equipment, as the redundancy backup default gateway of server each in LAN.The downstream connection route device of fire wall,
Ospf protocol is enabled between fire wall and router.Host apparatus timing sends VRRP group to stand-by equipment
Broadcasting protocol massages and notice the duty of this main equipment, when host apparatus breaks down, stand-by equipment can
Take over job in time, thus ensure the seriality that each server service is applied.
In above-mentioned networking plan, completed the two-node cluster hot backup of fire wall by VRRP agreement and ospf protocol,
Achieve the redundancy protecting of key node in LAN.When VRRP host apparatus breaks down, by VRRP
Stand-by equipment is taken over job in time, when two fire walls are operated in active-standby mode, VRRP shape often occurs
State is own through switching, but the OSPF of upstream (Open Shortest Path First, OSPF)
The problem that routing iinformation does not update, or, OSPF traffic path changes, but VRRP state does not has
The problem having switching.Wherein, OSPF is autonomous system interior routing protocol based on Link State, is also mesh
Front the most widely used IGRP.Therefore cause business datum to flow to mistake, affect user
Data communication, the seamless switching of business data flow can not be guaranteed.
Summary of the invention
The embodiment of the present invention provides a kind of data stream switching method and system, in order to solve to work as in prior art master
The problem of Data flow direction mistake after standby switching.
The inventive method one data stream switching method, the method includes: utilize Virtual Router Redundancy Protocol
VRRP monitors upstream and downstream link, triggers the first forwarding unit and second turn when meeting master/slave device switching condition
The activestandby state of the equipment of sending out switches, and deletes the virtual internet IP address that described first forwarding unit is preset,
And be that described second forwarding unit adds described virtual ip address, wherein, described first forwarding unit and described
The static ip address of the second forwarding unit is configured to sky, and described first forwarding unit forwards with described second and sets
The described VRRP backup group of standby composition, described first forwarding unit is preset as the primary of described VRRP backup group
Equipment, described second forwarding unit is preset as the stand-by equipment of described VRRP backup group, and described first forwards
Equipment is preset with virtual ip address, and described second forwarding unit is without virtual ip address；
Virtual ip address according to described second forwarding unit generates between the network side of described second forwarding unit
The direct-connected route of communication links, and delete the direct-connected route between described first forwarding unit and upstream router；
Delete the first static routing of communication links between described first forwarding unit and upstream router, generate
Second static routing of communication links between described second forwarding unit and upstream router；
The gratuitous ARP notification packet that switch according to described second forwarding unit downstream network side sends,
Update the forwarding information of described switch, described forwarding information be described second forwarding unit virtual ip address,
Virtual mac address and the corresponding relation of network interface；
Direct-connected route and the information of the second static routing described in upstream router redistribution, so that described road
OSPF OSPF is utilized to recalculate the routing table in optimum link path, according to meter by device
The flow direction of the routing table switching upstream router data stream obtained.
Based on same inventive concept, the embodiment of the present invention provides a kind of data flow handoff system further,
This system includes: switch unit, is used for utilizing Virtual Router Redundancy Protocol VRRP to monitor upstream and downstream link,
The activestandby state triggering the first forwarding unit and the second forwarding unit when meeting master/slave device switching condition occurs
Switching, deletes the virtual internet IP address that described first forwarding unit is preset, and sets for described second forwarding
The described virtual ip address of standby interpolation, wherein, described first forwarding unit and the static state of described second forwarding unit
IP address is configured to sky, and it is standby that described first forwarding unit and described second forwarding unit form described VRRP
Part group, described first forwarding unit is preset as the host apparatus of described VRRP backup group, and described second forwards
Equipment is preset as the stand-by equipment of described VRRP backup group, and described first forwarding unit is preset with virtual IP address ground
Location, described second forwarding unit is without virtual ip address；Virtual ip address according to described second forwarding unit is raw
Become the direct-connected route of communication links between the network side of described second forwarding unit, and delete described first forwarding
Direct-connected route between equipment and upstream router；Delete between described first forwarding unit and upstream router
First static routing of communication links, generates communication links between described second forwarding unit and upstream router
The second static routing；
TMU transmission message unit, for according to switch from described second forwarding unit to network side send free
ARP notification packet, updates the forwarding information of described switch, and described forwarding information is that described second forwarding sets
The corresponding relation of standby virtual ip address, virtual mac address and network interface；
Route redistribution unit, for the static road of direct-connected route described in upstream router redistribution and second
By information so that described router utilizes OSPF OSPF to recalculate optimum link
The routing table in path, according to the flow direction of calculated routing table switching upstream router data stream.
The embodiment of the present invention forwards engine by exploitation, and fire wall supports that network interface is furnished with static IP and virtual IP address,
Wherein, the static IP of fire wall supporting interface being configured to sky, successor virtual IP dynamically moves between master/slave device
Moving, specifically, the virtual IP address of each forwarding unit of configuration VRRP backup group, when the active and standby shape of forwarding unit
When state switches, dynamically add virtual ip address for host apparatus, dynamically delete on stand-by equipment
Virtual ip address, has virtual ip address because only having in VRRP backup group on host apparatus, and dynamically
Delete direct-connected and first static routing of communication links between described first forwarding unit and upstream router, dynamic
State ground generates states direct-connected and second static routing of communication links between the second forwarding unit and upstream router,
So being only configured with direct-connected and static routing, when the second forwarding unit becoming host apparatus on host apparatus
When sending free ARP message, the switch of network side will update network interface information according to ARP message.Separately
Outward, upstream router sends described direct-connected route and the second static routing, and the ospf protocol of upstream also can
Static routing according to host apparatus and the routing iinformation of direct-connected routing update upstream, each router utilizes open
The routing table of each router of OSPF OSPF redistribution, switches according to the routing table after redistribution
The flow direction of upstream router data stream.The direct-connected route the most not corresponding with virtual IP address due to the first forwarding unit and
First static routing, there is the direct-connected route corresponding with virtual IP address and the second static routing in the second forwarding unit,
Data stream thus can be guided into the second forwarding unit, thus ensure that when master/slave device switches,
The seamless switching of data stream.
Accompanying drawing explanation
For the technical scheme being illustrated more clearly that in the embodiment of the present invention, institute in embodiment being described below
The accompanying drawing used is needed to briefly introduce, it should be apparent that, the accompanying drawing in describing below is only the present invention's
Some embodiments, from the point of view of those of ordinary skill in the art, on the premise of not paying creative work,
Other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is that in prior art, a kind of two fire walls form two-node cluster hot backup relation；
Fig. 2 provides a kind of data stream switching method schematic flow sheet for the embodiment of the present invention；
Fig. 3 provides network topology during a kind of first forwarding unit master firewall fault for the embodiment of the present invention
Figure；
Fig. 4 provides a kind of first any one link of forwarding unit outgoing interface not use for the embodiment of the present invention
Time, the network topological diagram after active-standby switch；
Fig. 5 embodiment of the present invention also provides for a kind of data flow handoff system.
Detailed description of the invention
In order to make the object, technical solutions and advantages of the present invention clearer, below in conjunction with accompanying drawing to this
Bright it is described in further detail, it is clear that described embodiment is only some embodiments of the present invention,
Rather than whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art are not doing
Go out all other embodiments obtained under creative work premise, broadly fall into the scope of protection of the invention.
Forming two-node cluster hot backup relation in Fig. 1 between existing two pieces of fire walls, double-machine standby technology the most again may be used
It is divided into active-standby mode and main holotype.For ease of illustrating, referred to as master firewall and slave firewall.Tool
Body ground, active-standby mode refers to be in the whole business of network device processing of master state session entry is standby
Part in the network equipment being in resting state, it is in the network equipment of resting state and only backups process, no
Participation message forwards, and when the network equipment being in master state breaks down, message forwards and can cut rapidly
Change to be in the network equipment of resting state, store the meeting of backup owing to being in the network equipment of resting state
Words list item, therefore the message after switching can continue with, will not be interrupted.Main holotype then refers to two
The platform network equipment is all the primary network equipment being in master state, is i.e. involved in forwarding and processing business, with
Time backup each other again, when wherein a host apparatus breaks down, another persistently processes whole business.
Embodiment of the present invention technique proposed herein scheme, is based primarily upon active-standby mode.I.e. it is in the net of resting state
Network equipment, only backs up, and is not involved in the forwarding of message.
For ease of illustrate, in embodiment of the present invention technique proposed herein scheme, by integrated in the network device
The fire wall being currently at master state be referred to as master firewall, by integrated in the network device current
The fire wall being in resting state is referred to as slave firewall.
Embodiment of the present invention technique proposed herein scheme, can configure network interface on current master firewall
Static ip address be empty, and VRRP gateway address, specifically, the static ip address of such as network interface
For the virtual ip address information that 0.0.0.0/0, VRRP gateway is corresponding, then configure virtual ID, switch unit
The virtual mac address calculated according to virtual ID.
In order to solve in prior art when the problem of Data flow direction mistake, the embodiment of the present invention after active-standby switch
Thering is provided a kind of data stream switching method schematic flow sheet, shown in Figure 2, specifically implementation method includes:
Step S101, utilizes Virtual Router Redundancy Protocol VRRP to monitor upstream and downstream link, active and standby when meeting
The activestandby state triggering the first forwarding unit and the second forwarding unit during equipment switching condition switches, and deletes
The virtual ip address that described first forwarding unit is preset, and be that described second forwarding unit adds described virtual IP address
Address, wherein, the static ip address of described first forwarding unit and described second forwarding unit is configured to sky,
Described first forwarding unit and described second forwarding unit form described VRRP backup group, and described first forwards
Equipment is preset as the host apparatus of described VRRP backup group, and described second forwarding unit is preset as described VRRP
The stand-by equipment of backup group, described first forwarding unit is preset with virtual ip address, described second forwarding unit
Without virtual ip address.
Step S102, generates described second forwarding unit according to the virtual ip address of described second forwarding unit
The direct-connected route of communication links between network side, and delete between described first forwarding unit and upstream router
Direct-connected route.
Step S103, deletes the first static state of communication links between described first forwarding unit and upstream router
Route, generates the second static routing stating communication links between the second forwarding unit and upstream router.
Step S104, notices according to the gratuitous ARP that described second forwarding unit sends to the switch of network side
Message, updates the forwarding information of described switch, and described forwarding information is the virtual of described second forwarding unit
The corresponding relation of IP address, virtual mac address and network interface.
Step S105, direct-connected route and the information of the second static routing described in upstream router redistribution,
So that described router utilizes OSPF OSPF to recalculate the road in optimum link path
By table, according to the flow direction of calculated routing table switching upstream router data stream.
In embodiments of the present invention, in order to realize redundancy protecting, at the first forwarding unit, the second forwarding unit
Interface on enable VRRP agreement provide backup functionality for it, i.e. by run VRRP agreement create one
VRRP backup group, this VRRP backup group by first forwarding unit (as host apparatus) and several
Second forwarding unit (as stand-by equipment) forms, and user uplink access service is held by host apparatus under normal circumstances
Load, when host apparatus breaks down or during link exception, can be upgraded to host apparatus by stand-by equipment, by standby
Equipment takes over host apparatus work.VRRP by becoming a router by multiple router virtuals, and to granddad
Accuse a virtual ip address, it is achieved a quick backup switching during equipment fault.It is in Master (main
With) gateway of state or router be responsible for forwarding packet, other are in Backup (standby) state
Equipment is in hot standby state, and many visual plants all use the method for designing of this main-apparatus protection, as code division is many
Network control module, calling in location (Code Division Multiple Access, CDMA) base station sub-system
Processing module, Communications Processor Module all have employed this mode.
It addition, the static ip address of described first forwarding unit and described second forwarding unit is configured to sky,
Above-mentioned virtual ip address belongs to dynamic IP addressing, and the direct-connected and static routing corresponding with virtual ip address,
Can dynamically add and delete, the router in LAN uses OSPF (Open
Shortest Path First, OSPF) carry out routeing redistribution, in OSPF is autonomous system based on Link State
Portion's Routing Protocol, is also currently used most commonly used IGRP.
Further, if what following three kinds of situations at least occurred meets master/slave device switching condition first, described
Three kinds of situations are respectively as follows: described first forwarding unit and can not use；Appointing of described first forwarding unit incoming interface
A link of anticipating can not use；Any one link of described first forwarding unit outgoing interface can not use.
Further, VRRP backup group configures VRRP and monitor interface；By described monitoring interface profit
Link with each forwarding unit of VRRP backup group described in link failure detection technology for detection Yu upstream router
Connection situation, the result of informing VRRP upstream link detection；
By each forwarding unit and the switch of VRRP backup group described in described link failure detection technology for detection
Between link connection situation, informing VRRP downstream links detection result.
Wherein, described link failure detection technology be two-way converting detection technique, Network Quality Analysis technology,
In service-level agreement technology, ethernet operation and maintenance technology or perception transmitting warning technology any one
Kind.
Two kinds of data flow handoff scenes that above-mentioned three kinds of situations are corresponding, as shown in Figure 3 and Figure 4, separately below
Illustrate for two kinds of scenes.
Scene one
Data stream switching method that the embodiment of the present invention provide, net Fig. 3 and Fig. 4 shown in are exemplified below
Network topological diagram comprises UE (subscriber equipment, User Equipment), access point AP (for by subscriber equipment
UE access network), router 1 to router 4, host apparatus, stand-by equipment, server and network
In switch, described host apparatus and stand-by equipment can be router, it is also possible to for other number such as gateway
According to forwarding unit.Host apparatus, stand-by equipment and router 1 to router 4 can use OSPF to assist
View.Wherein, the thick lines of equipment room represent communication link, and the numeral on link represents the label of link, Fig. 3
In, link 1 to 7 can use (8 is heartbeat, is used for transmitting heartbeat data), and is now currently in use
Host apparatus carries out data transmission, but the master firewall network interface card event of host apparatus in data transmission procedure
Barrier, causes link 7 to disconnect, and dotted line in figs. 3 and 4 represents link or equipment unusable state.
In figure 3 because the master firewall net card failure of the first forwarding unit causes link 6 to disconnect, therefore
The embodiment of the present invention performs following step by exploitation business data flow forwarding engine modules and carries out data stream
Switching, specific as follows:
Step 201, because the master firewall net card failure of the first forwarding unit, by link failure detection skill
Art detection finds that link 6 disconnects, and the activestandby state triggering the first forwarding unit and the second forwarding unit is cut
Changing, the i.e. first forwarding unit becomes stand-by equipment, and the second forwarding unit becomes host apparatus.
Step 202, because activestandby state switches, so the virtual IP address ground deleted on the first forwarding unit
Location, and the direct-connected route of correspondence and the first static routing information, be that the second forwarding unit adds this void simultaneously
Intend IP address, direct-connected route, and the corresponding static routing information adding the second forwarding unit.
Step 203, because only that have virtual ip address and direct-connected route on the second forwarding unit, so second
Forwarding unit utilizes link 7 to send gratuitous ARP notice message to the switch of network side, and gratuitous ARP notifies
Message includes virtual ip address, the information of virtual mac address, because the second forwarding unit is to pass through chain
The gratuitous ARP notice message that the network interface on road 7 sends out, so the switch of network side is from the network interface of link 7
Receive gratuitous ARP notice message, just learn that be currently operating is the second forwarding unit.So switch
The corresponding relation of virtual ip address, virtual mac address and network interface will be updated., and by flow entrance link
7。
Step 204, business data flow forwards engine modules by the second static routing of the second forwarding unit and direct-connected
The information of route sends to the router of upstream, meanwhile, and also can be by the first static routing of the first forwarding unit
The information being deleted with direct-connected route notifies the router to upstream, and the most each router is according to the route received
Information Pull ospf protocol recalculates optimum link coordinates measurement routing table, when generating new routing table letter
After breath, the data stream of upstream has also guided the second forwarding unit into by new routing table.
Visible, in this scene, when in the first forwarding unit, master firewall network interface card breaks down, also
Or first link 6 of forwarding unit incoming interface when can not use, all can be according to the switching of above-mentioned data stream
Method switches over, and the fire wall of the second forwarding unit just enables, and is the most also guided by the data stream of upstream and downstream
Come on the second forwarding unit, accomplished the seamless switching of data stream.
Scene two
In the diagram because the link 1 of the first forwarding unit outgoing interface disconnects, therefore the embodiment of the present invention is passed through
Exploitation business data flow forwarding engine modules performs following step and carries out the switching of data stream, specific as follows:
Step 301, business data flow forwards engine modules monitoring to find link 1 and the disconnection of link 3 interface, because of
OSPF between this upstream router and fire wall has recalculated optimum link path, is drawn by the flow of upstream
Leading the second forwarding unit, i.e. business data flow forwards engine modules by the second static routing of the second forwarding unit
Sending the router to upstream with the information of direct-connected route, the most each router is according to the routing iinformation profit received
Regenerating routing table by ospf protocol, after generating new routing table information, the data stream of upstream is also
Guide the second forwarding unit into.
Step 302, VRRP monitoring interface listens to upstream link by described link failure detection technology for detection
1 and link 3 interface disconnect, therefore trigger VRRP re-elect, the i.e. first forwarding unit and second forward set
Standby activestandby state switches, and the first forwarding unit becomes stand-by equipment, and the second forwarding unit becomes primary
Equipment.
Step 303, because activestandby state switches, so the virtual IP address ground deleted on the first forwarding unit
Location, and the direct-connected route of correspondence and the first static routing information, be that the second forwarding unit adds this void simultaneously
Intend IP address, and correspondence adds direct-connected route and the static routing information of the second forwarding unit.
Step 304, because only that have virtual ip address on the second forwarding unit, so the second forwarding unit profit
Sending gratuitous ARP notice message with link 7 to the switch of network side, gratuitous ARP notice message includes
Virtual ip address, the information of virtual mac address, because the second forwarding unit is the network interface by link 7
The gratuitous ARP notice message sent out, so the switch of network side receives freely from the network interface of link 7
ARP notifies message, just learns that be currently operating is the second forwarding unit.So switch will update
The corresponding relation of virtual ip address, virtual mac address and network interface, causes the second forwarding unit by data stream,
And sent to the network side in downstream by the second forwarding unit.
Based on identical technology design, the embodiment of the present invention also provides for a kind of data flow handoff system, this system
Be equivalent to business data flow above and forward engine, above-mentioned data stream switching method embodiment can be performed.This
The system that bright embodiment provides is as it is shown in figure 5, include: switch unit 401, TMU transmission message unit 402, road
By redistribution unit 403, wherein:
Switch unit 401, is used for utilizing Virtual Router Redundancy Protocol VRRP to monitor upstream and downstream link, when full
The activestandby state triggering the first forwarding unit and the second forwarding unit during foot master/slave device switching condition is cut
Change, delete the virtual internet IP address that described first forwarding unit is preset, and be described second forwarding unit
Add described virtual ip address, wherein, described first forwarding unit and the static IP of described second forwarding unit
Address is configured to sky, and described first forwarding unit forms described VRRP backup with described second forwarding unit
Group, described first forwarding unit is preset as the host apparatus of described VRRP backup group, and described second forwarding sets
The standby stand-by equipment being preset as described VRRP backup group, described first forwarding unit is preset with virtual ip address,
Described second forwarding unit is without virtual ip address；Virtual ip address according to described second forwarding unit generates institute
State the direct-connected route of communication links between the network side of the second forwarding unit, and delete described first forwarding unit
And the direct-connected route between upstream router；Delete UNICOM between described first forwarding unit and upstream router
First static routing of link, generates between described second forwarding unit and upstream router the of communication links
Two static routing；
TMU transmission message unit 402, for according to described second forwarding unit exempting to the switch transmission of network side
Taking ARP notification packet, update the forwarding information of described switch, described forwarding information is described second forwarding
The corresponding relation of the virtual ip address of equipment, virtual mac address and network interface；
Route redistribution unit 403, sends described direct-connected route and second for upstream router redistribution
The information of static routing, so that described router utilizes OSPF OSPF to recalculate
The routing table of excellent link paths, according to the flow direction of calculated routing table switching upstream router data stream.
Further, if what following three kinds of situations at least occurred meets master/slave device switching condition first, described
Three kinds of situations are respectively as follows:
Described first forwarding unit can not use；
Any one link of described first forwarding unit incoming interface can not use；
Any one link of described first forwarding unit outgoing interface can not use.
Further, the static ip address of described first forwarding unit and described second forwarding unit is configured to
Empty.
Further, also include monitoring unit 404, for configuring VRRP monitoring in VRRP backup group
Interface；
Each forwarding of VRRP backup group described in link failure detection technology for detection is utilized by described monitoring interface
Equipment connects situation, the result of informing VRRP upstream link detection with the link of upstream router；
By each forwarding unit and the switch of VRRP backup group described in described link failure detection technology for detection
Between link connection situation, informing VRRP downstream links detection result.
Wherein, described link failure detection technology be two-way converting detection technique, Network Quality Analysis technology,
In service-level agreement technology, ethernet operation and maintenance technology or perception transmitting warning technology any one
Kind.
To sum up, the embodiment of the present invention is sky by configuring the static IP of each forwarding unit of VRRP backup group,
When the activestandby state of forwarding unit switches, dynamically add virtual ip address for host apparatus, delete
Virtual ip address on stand-by equipment, has virtual IP address ground because only having in VRRP backup group on host apparatus
Location, and dynamic delete the direct-connected of communication links between described first forwarding unit and upstream router and first
Static routing, is dynamically generated and states the direct-connected of communication links between the second forwarding unit and upstream router and
Two static routing, so being only configured with direct-connected and static routing, when becoming host apparatus on host apparatus
When second forwarding unit sends free ARP message, the switch of network side will update according to ARP message
Network interface information, switch is incorporated into the second forwarding unit flow.It addition, upstream router sends institute
State direct-connected route and the second static routing, the ospf protocol of upstream also can according to the static routing of host apparatus and
The routing iinformation of direct-connected routing update upstream, each router utilizes OSPF OSPF heavily to divide
The routing table sending out router each, switches the flow direction of upstream router data stream according to the routing table after redistribution.
The direct-connected route the most corresponding with virtual IP address due to the first forwarding unit and the first static routing, the second forwarding sets
Standby there is the direct-connected route corresponding with virtual IP address and the second static routing, data stream thus can be guided into the
Two forwarding units, thus ensure that when master/slave device switches, the seamless switching of data stream.
The present invention is with reference to method, equipment (system) and computer program according to embodiments of the present invention
Flow chart and/or block diagram describe.It should be understood that can by computer program instructions flowchart and/
Or flow process in each flow process in block diagram and/or square frame and flow chart and/or block diagram and/or
The combination of square frame.These computer program instructions can be provided to general purpose computer, special-purpose computer, embedded
The processor of datatron or other programmable data processing device is to produce a machine so that pass through computer
Or the instruction that the processor of other programmable data processing device performs produces for realizing at flow chart one stream
The device of the function specified in journey or multiple flow process and/or one square frame of block diagram or multiple square frame.
These computer program instructions may be alternatively stored in and can guide computer or other programmable data processing device
In the computer-readable memory worked in a specific way so that be stored in this computer-readable memory
Instruction produces the manufacture including command device, and this command device realizes at one flow process of flow chart or multiple stream
The function specified in journey and/or one square frame of block diagram or multiple square frame.
These computer program instructions also can be loaded in computer or other programmable data processing device, makes
Sequence of operations step must be performed to produce computer implemented place on computer or other programmable devices
Reason, thus the instruction performed on computer or other programmable devices provides for realizing flow chart one
The step of the function specified in flow process or multiple flow process and/or one square frame of block diagram or multiple square frame.
Although preferred embodiments of the present invention have been described, but those skilled in the art once know base
This creativeness concept, then can make other change and amendment to these embodiments.So, appended right is wanted
Ask and be intended to be construed to include preferred embodiment and fall into all changes and the amendment of the scope of the invention.
Obviously, those skilled in the art can carry out various change and modification without deviating from this to the present invention
Bright spirit and scope.So, if the present invention these amendment and modification belong to the claims in the present invention and
Within the scope of its equivalent technologies, then the present invention is also intended to comprise these change and modification.
Claims (8)
1. a data stream switching method, it is characterised in that the method includes:
Virtual Router Redundancy Protocol VRRP is utilized to monitor upstream and downstream link, when meeting master/slave device switching bar
The activestandby state triggering the first forwarding unit and the second forwarding unit during part switches, and deletes described first turn
The virtual internet IP address that the equipment of sending out is preset, and be that described second forwarding unit adds described virtual ip address,
Wherein, the static ip address of described first forwarding unit and described second forwarding unit is configured to sky, described
First forwarding unit forms described VRRP backup group, described first forwarding unit with described second forwarding unit
Being preset as the host apparatus of described VRRP backup group, it is standby that described second forwarding unit is preset as described VRRP
Part group stand-by equipment, described first forwarding unit is preset with virtual ip address, described second forwarding unit without
Virtual ip address；
Virtual ip address according to described second forwarding unit generates between the network side of described second forwarding unit
The direct-connected route of communication links, and delete the direct-connected route between described first forwarding unit and upstream router；
Delete the first static routing of communication links between described first forwarding unit and upstream router, generate
Second static routing of communication links between described second forwarding unit and upstream router；
The gratuitous ARP notification packet that switch according to described second forwarding unit downstream network side sends,
Update the forwarding information of described switch, described forwarding information be described second forwarding unit virtual ip address,
Virtual mac address and the corresponding relation of network interface；
Direct-connected route and the information of the second static routing described in upstream router redistribution, so that described road
OSPF OSPF is utilized to recalculate the routing table in optimum link path, according to meter by device
The flow direction of the routing table switching upstream router data stream obtained.
2. the method for claim 1, it is characterised in that also include:
If what following three kinds of situations at least occurred meets master/slave device switching condition first, described three kinds of situations are divided
It is not:
Master firewall in described first forwarding unit breaks down or network interface card is unplugged；
Any one link of described first forwarding unit incoming interface can not use；
Any one link of described first forwarding unit outgoing interface can not use.
3. the method for claim 1, it is characterised in that described utilize Virtual Router Redundancy Protocol
VRRP monitors upstream and downstream link, including:
In VRRP backup group, configure VRRP monitor interface；
Each forwarding of VRRP backup group described in link failure detection technology for detection is utilized by described monitoring interface
Equipment connects situation, the result of informing VRRP upstream link detection with the link of upstream router；
By each forwarding unit and the switch of VRRP backup group described in described link failure detection technology for detection
Between link connection situation, informing VRRP downstream links detection result.
4. method as claimed in claim 3, it is characterised in that described link failure detection technology is two-way
Forward detection technique, Network Quality Analysis technology, service-level agreement technology, ethernet operation and safeguard skill
Any one of art or perception transmitting warning technology.
5. a data flow handoff system, it is characterised in that this system includes:
Switch unit, is used for utilizing Virtual Router Redundancy Protocol VRRP to monitor upstream and downstream link, when meeting
The activestandby state triggering the first forwarding unit and the second forwarding unit during master/slave device switching condition switches,
Delete the virtual internet IP address that described first forwarding unit is preset, and be that described second forwarding unit adds
Described virtual ip address, wherein, described first forwarding unit and the static ip address of described second forwarding unit
Being configured to sky, described first forwarding unit forms described VRRP backup group with described second forwarding unit,
Described first forwarding unit is preset as the host apparatus of described VRRP backup group, and described second forwarding unit is pre-
Being set to the stand-by equipment of described VRRP backup group, described first forwarding unit is preset with virtual ip address, institute
State the second forwarding unit without virtual ip address；Virtual ip address according to described second forwarding unit generates described
The direct-connected route of communication links between the network side of the second forwarding unit, and delete described first forwarding unit with
Direct-connected route between upstream router；Delete UNICOM's chain between described first forwarding unit and upstream router
First static routing on road, generates between described second forwarding unit and upstream router the second of communication links
Static routing；
TMU transmission message unit, for according to switch from described second forwarding unit to network side send free
ARP notification packet, updates the forwarding information of described switch, and described forwarding information is that described second forwarding sets
The corresponding relation of standby virtual ip address, virtual mac address and network interface；
Route redistribution unit, for the static road of direct-connected route described in upstream router redistribution and second
By information so that described router utilizes OSPF OSPF to recalculate optimum link
The routing table in path, according to the flow direction of calculated routing table switching upstream router data stream.
6. system as claimed in claim 5, it is characterised in that also include:
If what following three kinds of situations at least occurred meets master/slave device switching condition first, described three kinds of situations are divided
It is not:
Master firewall fault or the network interface card of described first forwarding unit are unplugged；
Any one link of described first forwarding unit incoming interface can not use；
Any one link of described first forwarding unit outgoing interface can not use.
7. system as claimed in claim 5, it is characterised in that also include:
Monitoring unit, monitors interface for configuring VRRP in VRRP backup group；
Each forwarding of VRRP backup group described in link failure detection technology for detection is utilized by described monitoring interface
Equipment connects situation, the result of informing VRRP upstream link detection with the link of upstream router；
By each forwarding unit and the switch of VRRP backup group described in described link failure detection technology for detection
Between link connection situation, informing VRRP downstream links detection result.
8. system as claimed in claim 7, it is characterised in that described link failure detection technology is two-way
Forward detection technique, Network Quality Analysis technology, service-level agreement technology, ethernet operation and safeguard skill
Any one of art or perception transmitting warning technology.
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