CN109218177A - Overseas chain circuit detecting method and device, storage medium and computer equipment - Google Patents
Overseas chain circuit detecting method and device, storage medium and computer equipment Download PDFInfo
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- CN109218177A CN109218177A CN201710534703.6A CN201710534703A CN109218177A CN 109218177 A CN109218177 A CN 109218177A CN 201710534703 A CN201710534703 A CN 201710534703A CN 109218177 A CN109218177 A CN 109218177A
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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
- H04L45/28—Routing or path finding of packets in data switching networks using route fault recovery
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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
- H04L45/74—Address processing for routing
- H04L45/745—Address table lookup; Address filtering
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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
- H04L41/14—Network analysis or design
- H04L41/145—Network analysis or design involving simulating, designing, planning or modelling of a network
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L43/00—Arrangements for monitoring or testing data switching networks
- H04L43/08—Monitoring or testing based on specific metrics, e.g. QoS, energy consumption or environmental parameters
- H04L43/0805—Monitoring or testing based on specific metrics, e.g. QoS, energy consumption or environmental parameters by checking availability
- H04L43/0811—Monitoring or testing based on specific metrics, e.g. QoS, energy consumption or environmental parameters by checking availability by checking connectivity
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L61/00—Network arrangements, protocols or services for addressing or naming
- H04L61/09—Mapping addresses
- H04L61/10—Mapping addresses of different types
- H04L61/103—Mapping addresses of different types across network layers, e.g. resolution of network layer into physical layer addresses or address resolution protocol [ARP]
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- Computer Networks & Wireless Communication (AREA)
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- Telephonic Communication Services (AREA)
Abstract
The present invention relates to a kind of overseas chain circuit detecting methods, comprising: after the static routing information detecting next-hop position of configuration, controlled exchange machine is enabled to send ARP message according to detection result；Next-hop position is determined according to the arp reply information sent on controlled exchange machine, issues routing table to the controlled exchange machine and modifies the forwarding behavior of the APR message on the controlled exchange machine；Receive that the controlled exchange machine reports confirms that next-hop is unreachable between the overseas equipment after link failure information；Routing table is deleted, and is automatically selected after redundancy backup link generates corresponding routing iinformation, the forwarding behavior of the APR message on the controlled exchange machine is modified according to the routing iinformation.The present invention can quickly detect link failure, and the outer link of dynamically configurable and adjustion domain, meanwhile, when link breaks down, it quickly can select to route and switch, a kind of overseas link detecting device, storage medium and computer equipment are also provided.
Description
Technical field
The present invention relates to fields of communication technology, more particularly to a kind of overseas chain circuit detecting method and device, storage medium
And computer equipment.
Background technique
Software defined network (Software Defined Network, referred to as SDN) is present communications area research
Hot spot technology.SDN mainly includes the controller (Controller) of control plane and the interchanger (Switch) of forwarding surface, and SDN can
To separate control plane and data surface, to realize the flexible control of network flow, become network more as pipeline
Add intelligence.Control instruction is issued by OPENFLOW (abbreviation OF) agreement between controller and interchanger, is instructed on interchanger
Forwarding data flow.
BFD (Bidirectional Forwarding Detection, two-way converting detection) agreement, by Liang Tailu
By establishing session on device or multi-layer switches.If not receiving the BFD keep-alive of opposite end in when detecting after session establishment
Message is then thought to break down.
As shown in Figure 1, Switch1, Switch2 and Switch3 are controlled exchange machines, Switch4 is overseas uncontrolled friendship
It changes planes, host, various forms of network elements is also possible in real network.Current controller is to SW (such as Fig. 1 and Fig. 2 each in domain
In Switch1, Switch2, Switch3 etc.) between in link detecting and TOPO formation be all by LLDP (Link
Layer Discovery Protocol, Link Layer Discovery Protocol) complete, as shown in Fig. 2, controller learns to topology
Afterwards, BFD session is issued to each both link ends interchanger by OPENFLOW agreement, and monitors BFD session uploaded state.At this
In scheme, since the frequency of LLDP probe messages is far below BFD keep alive Packet, controller judges link failure by LLDP
It is later than BFD, and if LLDP set of frequency is very high, very big flow attack can be caused to controller, seriously affects control
The performance and efficiency of device processed.
Meanwhile LLDP is only applicable to the discovery of the switch-layer topology in domain, for overseas link, as shown in figure 3, currently,
Controller can only go to find by ARP (Address Resolution Protocol, address resolution protocol), and by ARP come
Keep-alive, as shown in Fig. 2, SW3 (Switch3 in Fig. 3) is the domain SDN inner boundary interchanger (and overseas communicated), SW4 (Fig. 3
In Switch4) be overseas equipment, linkage availability can only be judged by ARP response between SW3 and SW4.When controller
To after the ARP of next-hop, it can also reduce ARP and send frequency, when the port SW3 DOWN or link are broken, controller is perceived at this time
Obstructed less than between SW3 and SW4, flow table group table will not change on interchanger, cause flow obstructed in certain time.
When the discovery of ARP detection next time is not responded, controller just perceives link DOWN between SW3 and SW4 and falls.
In some schemes, interchanger opposite end not only can be SW4 interchanger, can also be fictitious host computer, and host has
The behaviors such as upper offline, migration, if to empty machine using traditional ARP keep-alive can not meet demand, for example, scheme requirement must
Must meet network satisfy the need diameter switching rate be lower than 100ms index when, be far from satisfying demand.
Summary of the invention
Based on this, it is necessary in view of the above-mentioned problems, providing overseas chain circuit detecting method that is a kind of dynamically configurable and adjusting
And device, storage medium and computer equipment.
A kind of overseas chain circuit detecting method, comprising:
After controller is according to the static routing information detecting next-hop position of configuration, controlled exchange machine is enabled to be tied according to detection
Fruit sends ARP message；
The controller receives the arp reply information sent on the controlled exchange machine；Wherein, the arp reply information is
The feedback information for the ARP message that overseas equipment sends the controlled exchange machine；
The controller determines next-hop position according to the arp reply information, issues routing to the controlled exchange machine
Table simultaneously modifies the forwarding behavior of the APR message on the controlled exchange machine；
The controller receive that the controlled exchange machine reports between the overseas equipment after link failure information really
It is unreachable to recognize next-hop；After the keep alive Packet generates BFD session between the overseas equipment and the controlled exchange machine,
The keep alive Packet of the controlled exchange machine is sent to according to session parameter；
The controller deletes routing table, and automatically selects after redundancy backup link generates corresponding routing iinformation, root
The forwarding behavior of the APR message on the controlled exchange machine is modified according to the routing iinformation.
A kind of overseas chain circuit detecting method, comprising:
Controlled exchange machine is after controller is according to the static routing information detecting next-hop position of its configuration, according to detection
As a result ARP message is sent；
The controlled exchange machine receives the arp reply information that the overseas equipment is fed back after receiving the ARP message,
And it will send thereon to the controller；
The controlled exchange machine receives the APR message forwarding behavior of routing table and modification that the controller issues；
The controlled exchange machine receives the first BDF session information that the controller is sent, wherein the first BDF meeting
Talking about information includes the BDF time parameter configured in the static routing information；
BDF session is formed on the controlled exchange machine, is conversated between the controlled exchange machine and the overseas equipment
Negotiate and determines session parameter；
When the controlled exchange machine does not receive the keep alive Packet in the preset time period, the controlled friendship is judged
It changes planes and occurs link failure between the overseas equipment, and the link failure information is reported into the controller.
A kind of overseas link detecting device, described device are located at controller end, comprising:
Detecting module enables controlled exchange machine root after the static routing information detecting next-hop position according to configuration
ARP message is sent according to detection result；
First receiving module, for receiving the arp reply information sent on the controlled exchange machine；Wherein, the arp reply
Information is the feedback information for the ARP message that overseas equipment sends the controlled exchange machine；
Module is issued, for determining next-hop position according to the arp reply information, issues road to the controlled exchange machine
By table and modify the forwarding behavior of the APR message on the controlled exchange machine；
Confirmation module, for receiving that the controlled exchange machine reports between the overseas equipment after link failure information
Confirm that next-hop is unreachable；
Module is adjusted, for deleting routing table, and is automatically selected after redundancy backup link generates corresponding routing iinformation,
The forwarding behavior of the APR message on the controlled exchange machine is modified according to the routing iinformation.
A kind of overseas link detecting device, described device are located at controlled exchange generator terminal, comprising:
Sending module, for controller according to its configuration static routing information detecting next-hop position after, according to
Detection result sends ARP message；
On send module, the arp reply information fed back after receiving the ARP message for receiving the overseas equipment,
And it will send thereon to the controller；
Second receiving module, the APR message for receiving routing table and modification that the controller issues forward behavior；
Third receiving module, the first BDF session information sent for receiving the controller, wherein the first BDF
Session information includes the BDF time parameter configured in the static routing information；
Session generation module is used to form BDF session, conversates between the controlled exchange machine and the overseas equipment
Negotiate and determines session parameter；
Breakdown judge module, when for not receiving the keep alive Packet in the preset time period, judgement it is described by
Occur link failure between controlled switching system and the overseas equipment, and the link failure information is reported into the controller.
A kind of computer readable storage medium, is stored with that computer is executable to be referred on the computer readable storage medium
It enables, when the computer executable instructions are executed by processor, so that the processor executes following steps: according to the quiet of configuration
After state routing iinformation detecting next-hop position, controlled exchange machine is enabled to send ARP message according to detection result；It receives described controlled
The arp reply information sent on interchanger；Wherein, the arp reply information is that overseas equipment sends the controlled exchange machine
ARP message feedback information；Next-hop position is determined according to the arp reply information, issues road to the controlled exchange machine
By table and modify the forwarding behavior of the APR message on the controlled exchange machine；It is reporting with the domain to receive the controlled exchange machine
Confirm that next-hop is unreachable between external equipment after link failure information；The keep alive Packet be the overseas equipment with it is described controlled
After generating BFD session between interchanger, the keep alive Packet of the controlled exchange machine is sent to according to session parameter；Delete routing
Table, and automatically select after redundancy backup link generates corresponding routing iinformation, it is modified according to the routing iinformation described controlled
APR message on interchanger forwards behavior.
A kind of computer equipment, including memory and processor store computer-readable instruction in the memory, institute
When stating computer-readable instruction and being executed by the processor, so that the processor executes following steps: according to the static state of configuration
After routing iinformation detecting next-hop position, controlled exchange machine is enabled to send ARP message according to detection result；Receive the controlled friendship
The arp reply information sent on changing planes；Wherein, the arp reply information is that overseas equipment sends the controlled exchange machine
The feedback information of ARP message；Next-hop position is determined according to the arp reply information, issues routing to the controlled exchange machine
Table simultaneously modifies the forwarding behavior of the APR message on the controlled exchange machine；Receive that the controlled exchange machine reports with it is described overseas
Confirm that next-hop is unreachable between equipment after link failure information；The keep alive Packet is the overseas equipment and the controlled friendship
After generating BFD session between changing planes, the keep alive Packet of the controlled exchange machine is sent to according to session parameter；Delete routing
Table, and automatically select after redundancy backup link generates corresponding routing iinformation, it is modified according to the routing iinformation described controlled
APR message on interchanger forwards behavior.
Above-mentioned overseas chain circuit detecting method and device, storage medium and computer equipment, the opposite equip. of controlled exchange machine
Not instead of controlled exchange machine in the domain SDN, overseas equipment, the present invention are used for quickly detecting the event of link between the two using BFD
Hinder, in the present invention, mainly BFD and SDN is combined, the link position of interchanger in overseas equipment and domain is obtained by ARP information
Information, and determine next-hop position.Meanwhile when link breaks down, so that SDN equipment is can achieve quickly selection and route and cut
The purpose changed.
Detailed description of the invention
Fig. 1 is SDN network schematic diagram in the prior art.
Fig. 2 is the schematic diagram of BDF keep-alive link state in SDN network domain in the prior art.
Fig. 3 is the overseas ARP keep-alive next-hop schematic diagram of SDN network in the prior art.
Fig. 4 is the flow chart of overseas chain circuit detecting method in one embodiment of the invention.
Fig. 5 is the flow chart of overseas chain circuit detecting method in another embodiment of the present invention.
Fig. 6 is the flow chart of the step S101 of overseas chain circuit detecting method in one embodiment of the invention.
Fig. 7 is the flow chart of overseas chain circuit detecting method in another embodiment of the invention.
Fig. 8 is the flow chart of overseas chain circuit detecting method in further embodiment of the present invention.
Fig. 9 is the structural block diagram of overseas link detecting device in one embodiment of the invention.
Figure 10 is the structural block diagram of overseas link detecting device in another embodiment of the present invention.
Figure 11 is the structural block diagram of the detecting module of overseas link detecting device in one embodiment of the invention.
Figure 12 is the structural block diagram of overseas link detecting device in another embodiment of the invention.
Figure 13 is the schematic diagram of overseas link detecting in one embodiment of the invention.
Figure 14 is the flow chart of overseas link detecting in one embodiment of the invention.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, with reference to the accompanying drawings and embodiments, right
The present invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and
It is not used in the restriction present invention.
As shown in Fig. 4, Figure 13 and Figure 14, in one embodiment, a kind of overseas chain circuit detecting method is provided, including following
Step S101 to step S105:
Step S101 enables controlled exchange machine after controller is according to the static routing information detecting next-hop position of configuration
ARP message is sent according to detection result；It will be appreciated that user can be believed by the static routing in controller Configuration network
Breath, the static routing information are including but not limited to purpose address and next hop address, meanwhile, in configuration static routing letter
After breath, the ARP event that controller begins listening for next-hop (learns to next-hop position or receives according to arp reply message
Link Failure message).
In some embodiments, as shown in fig. 6, the step S101 includes:
Step S1011, controller configures static routing information；Wherein, the static routing information includes but is not limited to
Destination address；That is, in this step, when the controller (Controller in Figure 13) in the domain SDN configures in the step A of Figure 14
After static routing information, lower configuration information will record, and initially enter detecting next-hop position in step B (that is, at this
The corresponding IP network section of routing of destination address, the device id and port numbers at place are searched in the ARP information of ground storage).
Step S1012, with the presence or absence of the destination address in the ARP information that the described controller detection is locally stored；That is,
The step corresponds to the step B in Figure 14, and controller detecting next-hop position in the ARP information being locally stored (that is, search
The routing of destination address corresponds to the device id and port numbers of IP network section, place), enter step C in Figure 14 later.
Step S1013, in the ARP information being locally stored and when the destination address is not present, the controller enable by
Controlled switching system sends ARP message from all ports ACCESS in the form of multicast；That is, if in the ARP information being locally stored
It is middle to search less than device id where corresponding IP network section and port numbers (detection is less than next-hop position), then in the form of multicast from by
All ACCESS mouthfuls of controlled switching system (Switch3 in Figure 13) sends out ARP message in the form of multicast.
Step S1014, when, there are when the destination address, the controller enables controlled friendship in the ARP information being locally stored
It changes planes and sends ARP message from port corresponding with the destination address in the form of unicast.That is, if can be locally stored
The corresponding IP network section of routing of destination address, the device id at place and port numbers are found in ARP information (detects next-hop position
Set), then ARP message is sent out from the port of controlled exchange machine (Switch3 in Figure 13) in the form of unicast.
As shown in figure 4, the step S102 of the method, the controller receive the ARP sent on the controlled exchange machine and answer
Answer information；Wherein, the arp reply information is that overseas equipment (Switch4 in Figure 13) sends the controlled exchange machine
The feedback information of ARP message (as shown in step D in Figure 14)；By taking unicast fashion as an example, if next-hop is that SW4 is (overseas in Figure 13
Equipment Switch4) on some interface IP, if link is intact between SW3 (Switch3 in Figure 13) and SW4, SW4 is received
After ARP message, (controlled exchange machine SW3 feeds back arp reply information i.e. as described in step D institute aspect in Figure 14) can be given a response,
After SW3 receives arp reply information, controller (step E in Figure 14) will be sent in the arp reply information.
Step S103, the controller determine next-hop position according to the arp reply information, to the controlled exchange machine
It issues routing table and modifies the forwarding behavior of the APR message on the controlled exchange machine；That is, when controller receives arp reply
After information, detect be SW3 the ARP that reports of some port, it is believed that next-hop is reachable, also can determine that the position letter of next-hop
Breath is this port (such as Figure 14 step F) detected on above-mentioned SW3.At this point, position of the controller according to next-hop position
Information issues routing table, modifies and modify the forwarding of the APR message on controlled exchange machine behavior (such as Figure 14 step G),
That is, next-hop ip address is the exit port of the flow table of network segment where route next jump in adjustment equipment, to control interchanger pair
ARP message is correctly forwarded.
Step S104, the controller receive the link failure between the overseas equipment that the controlled exchange machine reports
Confirm that next-hop is unreachable after information；The keep alive Packet generates BFD between the overseas equipment and the controlled exchange machine
After session, the keep alive Packet of the controlled exchange machine is sent to according to session parameter.In one embodiment, in above-mentioned steps
In S101, controller persistently monitors ARP event, acquires next-hop ARP when controller and (thinks next-hop by arp reply message
It is reachable, and determine the location information of next-hop) after, controller parses specific device id and end from arp reply information
Slogan, and corresponding BFD session is created according to the BFD time parameter configured in static routing configuration information, which is protected
It deposits, and BFD session information (step H in Figure 14) is sent to SW3 by OPENFLOW, and then form BFD session (figure on SW3
Step I in 14).At this point, in the embodiment of figure 14, since overseas equipment SW4 is uncontrolled interchanger, the upper BFD meeting of SW4
Words be it is preconfigured, session negotiation process is also to carry out between SW3 and SW4, session negotiation success after, determine session join
Number；Wherein, the session parameter not only includes device id, local terminal IP, opposite end IP, transmission time interval, Required Min Rx Interval etc.
Basic parameter, also includes state, the message sending time of current BFD session, and detection multiple both sides join according to the session after negotiation
Number constantly sends keep alive Packet (namely the BFD keep-alive message illustrated in K1 and K2 in Figure 14).
In the embodiment of Figure 13 and Figure 14, if SW3 will receive the keep alive Packet of SW4 transmission at the appointed time, say
Bright link is simultaneously without failure, and BFD state keeps UP (as shown in step L in Figure 14).And send and receive the guarantor of keep alive Packet
If there is following situations during work: 1) SW3 itself port DOWN；2) link disconnects between SW3 and SW4, and 3) SW4 interchanger
DOWN；Any one in above situation, which can make SW3 at the appointed time, can not receive the keep alive Packet of SW4 transmission, this
When, the upper BFD state of SW3 can be set to DOWN.And SW3 can be in the PORT_STATUS asynchronous message of OPENFLOW
PORT STATE reports BFD DOWN state, and (namely step M in Figure 14, the controlled exchange machine are reporting with the overseas equipment
Between link failure information), wherein the position OFPPS_BFD_DOWN of port state be used to indicate BFD testing result.Due to control
Device processed assert whether link breaks down by judging OFPPS_BFD_DOWN, once therefore the marker set (0 or
1), then it represents that BFD detects link failure.It is unreachable (step N in Figure 14) that controller perceives next-hop at this time.
Step S105, the controller delete routing table, and automatically select redundancy backup link and generate corresponding routing letter
After breath, the forwarding behavior of the APR message on the controlled exchange machine is modified according to the routing iinformation.Controller is perceived and is recorded
After BFD-DOWN state, redundancy backup chain is automatically selected according to link failure information (including links location and malfunction)
Road generates corresponding routing iinformation, re-issues and is routed to SDN switch equipment in domain.Mainly pass through OPENFLOW herein
The flowmod message of agreement issues flow table to corresponding interchanger, adjusts the pipeline processes of interchanger, to realize to message
It is forwarded according to the routing iinformation just generated and (corresponds to step O in Figure 14), finally, controller is to corresponding controlled exchange machine
The flow table and group table of modification are issued, the forwarding behavior on interchanger is modified, so that business datum is switched to other smooth roads
On diameter, to guarantee that business is not interrupted.
In the present embodiment, controlled exchange machine in the opposite equip. of the controlled exchange machine not instead of domain SDN, overseas equipment,
The present invention pays close attention to the edge switch with overseas communication, the mainly accessibility of static routing next-hop, has modified original
The scheme by ARP keep-alive, be used for quickly detecting link failure between the two, therefore the overseas equipment in opposite end using BFD
BFD session is enabled, what BFD negotiation, keep-alive process were still walked is traditional Routing Protocol.The present invention mainly ties BFD and SDN
It closes, the link position information of interchanger in overseas equipment and domain is obtained by ARP information, and determine next-hop position, specific to
Then some port of some interchanger of device within the domain is issued and is detected using OPENFLOW agreement carrying BFD session information.Together
When, when link breaks down, the routing iinformation for generating SDN device within the domain is calculated by software control, can achieve SDN equipment
The quickly purpose that selection routes and switches.
As shown in figure 5, in one embodiment, after the step S105 of the method further include:
Step S106, the controller listen to after ARP failure (step P in Figure 14), and the controlled exchange machine is enabled to delete
Except the BDF session between the overseas equipment, and it is back to step S101.That is, since controller can monitor ARP information,
If controller is configured with next-hop, ARP information (the arp reply information and link in Figure 14 of next-hop will be constantly monitored
Fault message), and issue BFD session information when ARP fails (receiving the link failure information reported) and delete session (Figure 14
Middle step Q and step R)；And after deleting BFD session, controller, which returns in step S101, to be continued to start detecting next-hop
Position, and while (receiving arp reply information) when ARP comes into force again, can issue BFD session information, generate BFD session, therefore
It can accomplish dynamically to be detected.
As shown in fig. 7, in one embodiment, also providing a kind of overseas chain circuit detecting method, including the following steps S107
To step S112:
Step S107, controlled exchange machine controller according to its configuration static routing information detecting next-hop position it
Afterwards, ARP message is sent according to detection result；It will be appreciated that user passes through the static routing information in controller Configuration network
Later, the ARP event that controller begins listening for next-hop (learns to next-hop position according to arp reply message or receives chain
Road failure message).It (is visited if searched in the ARP information being locally stored less than device id and port numbers where corresponding IP network section
Do not detect next-hop position), then in the form of multicast from all ACCESS mouthfuls of controlled exchange machine (Switch3 in Figure 13) with group
The form of broadcasting sends out ARP message.If the routing that can find destination address in the ARP information being locally stored corresponds to IP network
Section, the device id at place and port numbers (detecting next-hop position), then in the form of unicast from controlled exchange machine (in Figure 13
Switch3 port) sends out ARP message.
Step S108, the controlled exchange machine receive the ARP that the overseas equipment is fed back after receiving the ARP message
Response message, and will give thereon to the controller；By taking unicast fashion as an example, if next-hop is SW4 (overseas equipment in Figure 13
Switch4 the IP of some interface on), if link is intact between SW3 (Switch3 in Figure 13) and SW4, SW4 receives ARP report
Wen Hou can give a response (controlled exchange machine SW3 feeds back arp reply information i.e. as described in step D institute aspect in Figure 14), and SW3 is received
To after arp reply information, controller (step E in Figure 14) will be sent in the arp reply information.
Step S109, the APR message that the controlled exchange machine receives routing table and modification that the controller issues turn
It is distributed as；That is, after controller receives arp reply information, detect be SW3 the ARP that reports of some port, it is believed that
Next-hop is reachable, also can determine that the location information of next-hop is this port (such as Figure 14 step detected on above-mentioned SW3
F).At this point, controller issues routing table according to the location information of next-hop position, modifies and modify on the controlled exchange machine
APR message forward behavior (such as Figure 14 step G), that is, adjustment equipment on next-hop ip address be route next jump where net
The exit port of the flow table of section, correctly forwards ARP message to control interchanger.
Step S110, the controlled exchange machine receive the first BDF session information that the controller is sent, wherein described
First BDF session information includes the BDF time parameter configured in the static routing information；In one embodiment, above-mentioned
In step S101, controller persistently monitors ARP event, when controller acquires next-hop ARP (under thinking by arp reply message
One jumps location information that is reachable, and determining next-hop) after, controller parses specific device id from arp reply information
And port numbers, and corresponding BFD session is created according to the BFD time parameter configured in static routing configuration information, by the BDF meeting
Words save, and send BFD session information (step H in Figure 14) to SW3 by OPENFLOW, are formed on SW3 in order to subsequent
BFD session (step I in Figure 14).
Step S111 forms BDF session on the controlled exchange machine, between the controlled exchange machine and the overseas equipment
Conversate negotiation and determining session parameter；That is, being formed after BFD session (step I in Figure 14) on SW3, at this point, scheming
In 14 embodiment, since overseas equipment SW4 is uncontrolled interchanger, the upper BFD session of SW4 is preconfigured, session
Negotiations process is also to carry out between SW3 and SW4, after session negotiation success, determines session parameter；Wherein, the session parameter
Not only include the basic parameters such as device id, local terminal IP, opposite end IP, transmission time interval, Required Min Rx Interval, also includes current
State, the message sending time of BFD session detect multiple both sides according to the session parameter after negotiation and constantly send keep alive Packet
(namely the BFD keep-alive message illustrated in K1 and K2 in Figure 14).
Step S112, when the controlled exchange machine does not receive the keep alive Packet in the preset time period, judgement
Occur link failure between the controlled exchange machine and the overseas equipment, and the link failure information is reported into the control
Device processed.In the embodiment of Figure 13 and Figure 14, if SW3 will receive the keep alive Packet of SW4 transmission at the appointed time, illustrate chain
Road is simultaneously without failure, and BFD state keeps UP (as shown in step L in Figure 14).And send and receive the keep-alive of keep alive Packet
If there is following situations in journey: 1) SW3 itself port DOWN；2) link disconnects between SW3 and SW4, and 3) SW4 interchanger
DOWN；Any one in above situation, which can make SW3 at the appointed time, can not receive the keep alive Packet of SW4 transmission, this
When, the upper BFD state of SW3 can be set to DOWN, at this point, the controlled exchange machine, which is reported, chain occurs between the overseas equipment
Road failure.After controller perceives and records BFD-DOWN state, according to link failure information (including links location and failure
State) redundancy backup link is automatically selected, corresponding routing iinformation is generated, re-issues and is routed to SDN switch equipment in domain.
Herein mainly by the flowmod message of OPENFLOW agreement, flow table is issued to corresponding interchanger, adjusts the flowing water of interchanger
Line processing is forwarded according to the routing iinformation just generated to message to realize and (corresponds to step O in Figure 14), finally, control
Device processed issues the flow table and group table of modification to corresponding controlled exchange machine, the forwarding behavior on interchanger is modified, so that business number
According to being switched on other smooth paths, to guarantee that business is not interrupted.
In one embodiment, the session parameter according to the BDF time parameter with it is preset in the overseas equipment
2nd BDF session information determines；The session parameter is including but not limited to send message time, transmission time interval, most
Small receiving time and detection multiple；As shown in figure 8, the method also includes:
Step S113, the controlled exchange machine are deleted and overseas are set with described after the controller listens to ARP failure
The BDF session between standby, and it is back to step S107.That is, since controller can monitor ARP information, if controller
It is configured with next-hop, will constantly monitor the ARP information (arp reply information and link failure information in Figure 14) of next-hop,
And ARP fail (receiving the link failure information reported) when issue BFD session information delete session (in Figure 14 step Q with
Step R)；And after deleting BFD session, controller returns in step S107 the spy continued according to controller for next-hop
It surveys result and sends ARP message.
Above-mentioned overseas chain circuit detecting method, provide it is a kind of can be achieved, the adjustable domain SDN inward flange switch-link is cut
It changes, the brand new technical that static routing is realized, solves SDN network and traditional network mixed deployment, data forwarding, flow drainage etc.
Realistic problem.Since the information such as BFD detection parameters are adjustable, static routing can be modified, so that the interchanger in data forwarding face is set
It is standby more controllable, the flexibility for enhancing the controlling of SDN network and using.In addition, SDN is examined for BFD in the embodiment of the present invention
It surveys and message encapsulation format can be achieved, convenient for interactive with SDN equipment in domain.
It is intelligible, the present invention provides a kind of BFD testing mechanism suitable for the static routing of the field SDN, but this principle
It is equally applicable in scenes such as ospf neighbor, the bgp neighbor discoveries in the field SDN.
As shown in figure 9, in one embodiment, corresponding to above-mentioned overseas chain circuit detecting method, providing a kind of overseas link
Detection device, described device are located at controller end, comprising:
Detecting module 11 enables controlled exchange machine after the static routing information detecting next-hop position according to configuration
ARP message is sent according to detection result；
First receiving module 12, for receiving the arp reply information sent on the controlled exchange machine；Wherein, the ARP is answered
Answer the feedback information that information is the ARP message that overseas equipment sends the controlled exchange machine；
Module 13 is issued, for determining next-hop position according to the arp reply information, is issued to the controlled exchange machine
Routing table simultaneously modifies the forwarding behavior of the APR message on the controlled exchange machine；
Confirmation module 14, the link failure information between the overseas equipment reported for receiving the controlled exchange machine
Confirmation next-hop is unreachable afterwards；
Adjust module 15, for deleting routing table, and automatically select redundancy backup link generate corresponding routing iinformation it
Afterwards, the forwarding behavior of the APR message on the controlled exchange machine is modified according to the routing iinformation.
As shown in Figure 10, in one embodiment, described device further include:
Monitor module 16, after listening to ARP failure, enable the controlled exchange machine delete with the overseas equipment it
Between the BDF session, and be back to the static routing information detecting next-hop position for enabling detecting module according to configuration.
As shown in figure 11, in one embodiment, the detecting module 11 includes:
Submodule 1110 is configured, for configuring static routing information；Wherein, the static routing information includes destination
Location；
Detection sub-module 1120, for detecting in the ARP information being locally stored with the presence or absence of the destination address；
First sending submodule 1130, for enabling in the ARP information being locally stored and when the destination address is not present
Controlled exchange machine sends ARP message from all ports ACCESS in the form of multicast；
Second sending submodule 1140, for when in the ARP information being locally stored there are when the destination address, the control
Device processed enables controlled exchange machine send ARP message from port corresponding with the destination address in the form of unicast.
As shown in figure 12, in one embodiment, a kind of overseas link detecting device is also provided, described device is located at controlled
Exchange generator terminal, comprising:
Sending module 17, for controller according to its configuration static routing information detecting next-hop position after, root
ARP message is sent according to detection result；
On send module 18, the arp reply letter fed back after receiving the ARP message for receiving the overseas equipment
Breath, and will give thereon to the controller；
Second receiving module 19, the APR message for receiving routing table and modification that the controller issues forward row
For；
Third receiving module 20, the first BDF session information sent for receiving the controller, wherein described first
BDF session information includes the BDF time parameter configured in the static routing information；
Session generation module 21 is used to form BDF session, is understood between the controlled exchange machine and the overseas equipment
Words negotiate and determine session parameter；
Breakdown judge module 22, when for not receiving the keep alive Packet in the preset time period, described in judgement
Occur link failure between controlled exchange machine and the overseas equipment, and the link failure information is reported into the control
Device.
Above-mentioned overseas link detecting device, controlled exchange machine in the opposite equip. of the controlled exchange machine not instead of domain SDN, domain
External equipment, and it has modified original scheme by ARP keep-alive, is used for quickly detecting the event of link between the two using BFD
Barrier, therefore the overseas equipment in opposite end will also enable BFD session.The present invention mainly combines BFD and SDN, obtains domain by ARP information
The link position information of interchanger in external equipment and domain, and determine next-hop position, specific to device within the domain some interchanger
Then some port is issued and is detected using OPENFLOW agreement carrying BFD session information.Meanwhile when link breaks down,
The routing iinformation for generating SDN device within the domain is calculated by software control, so that SDN equipment is can achieve quickly selection and is routed and switch
Purpose.
In one embodiment, correspond to above-mentioned overseas chain circuit detecting method, a kind of computer-readable storage medium is also provided
Matter is stored with computer executable instructions on the computer readable storage medium, and the computer executable instructions are processed
When device executes, so that the processor executes following steps: after the static routing information detecting next-hop position of configuration,
Controlled exchange machine is enabled to send ARP message according to detection result；Receive the arp reply information sent on the controlled exchange machine；Wherein,
The arp reply information is the feedback information for the ARP message that overseas equipment sends the controlled exchange machine；According to described
Arp reply information determines next-hop position, issues routing table to the controlled exchange machine and modifies on the controlled exchange machine
APR message forwards behavior；Receive that the controlled exchange machine reports confirms after link failure information between the overseas equipment
Next-hop is unreachable；After the keep alive Packet generates BFD session between the overseas equipment and the controlled exchange machine, press
The keep alive Packet of the controlled exchange machine is sent to according to session parameter；Routing table is deleted, and it is raw to automatically select redundancy backup link
After corresponding routing iinformation, the forwarding behavior of the APR message on the controlled exchange machine is modified according to the routing iinformation.
Above-mentioned computer readable storage medium, controlled exchange machine in the opposite equip. of the controlled exchange machine not instead of domain SDN,
Overseas equipment, and it has modified original scheme by ARP keep-alive, is used for quickly detecting link between the two using BFD
Failure, therefore the overseas equipment in opposite end will also enable BFD session.The present invention mainly combines BFD and SDN, is obtained by ARP information
The link position information of interchanger in overseas equipment and domain, and determine next-hop position, specific to some interchanger of device within the domain
Some port, then issue and detect using OPENFLOW agreement carrying BFD session information.Meanwhile it breaking down in link
When, the routing iinformation for generating SDN device within the domain is calculated by software control, so that SDN equipment is can achieve quickly selection and is routed and cut
The purpose changed.
In one embodiment, when computer executable instructions are executed by processor, processor is also made to execute following step
It is rapid: to listen to after ARP failure, enable the controlled exchange machine delete the BDF session between the overseas equipment, and return
It is back to the static routing information detecting next-hop position for enabling detecting module according to configuration.
In one embodiment, when computer executable instructions are executed by processor, processor is also made to execute following step
It is rapid: configuration static routing information；Wherein, the static routing information includes destination address；It detects in the ARP information being locally stored
With the presence or absence of the destination address；In the ARP information being locally stored and when the destination address is not present, controlled exchange machine is enabled
ARP message is sent from all ports ACCESS in the form of multicast；When there are the destination addresses in the ARP information being locally stored
When, the controller enables controlled exchange machine send ARP message from port corresponding with the destination address in the form of unicast.
In one embodiment, when computer executable instructions are executed by processor, processor is also made to execute following step
It is rapid: after controller is according to the static routing information detecting next-hop position of its configuration, ARP report being sent according to detection result
Text；The arp reply information that the overseas equipment is fed back after receiving the ARP message is received, and will be sent thereon to the control
Device processed；Receive the APR message forwarding behavior of routing table and modification that the controller issues；Receive what the controller was sent
First BDF session information, wherein the first BDF session information includes joining the BDF time configured in the static routing information
Number；BDF session is formed, conversate negotiation and determining session parameter between the controlled exchange machine and the overseas equipment；?
When not receiving the keep alive Packet in the preset time period, judge to go out between the controlled exchange machine and the overseas equipment
Existing link failure, and the link failure information is reported into the controller.In one embodiment, correspond to above-mentioned overseas
Chain circuit detecting method also provides a kind of computer equipment, including memory and processor, stores computer in the memory
Readable instruction, when the computer-readable instruction is executed by the processor, so that the processor executes following steps: according to
After the static routing information detecting next-hop position of configuration, controlled exchange machine is enabled to send ARP message according to detection result；It receives
The arp reply information sent on the controlled exchange machine；Wherein, the arp reply information is overseas equipment for the controlled friendship
Change planes transmission ARP message feedback information；Next-hop position is determined according to the arp reply information, to the controlled exchange
Machine issues routing table and modifies the forwarding behavior of the APR message on the controlled exchange machine；Receive what the controlled exchange machine reported
Confirm that next-hop is unreachable after link failure information between the overseas equipment；The keep alive Packet be the overseas equipment with
After generating BFD session between the controlled exchange machine, the keep alive Packet of the controlled exchange machine is sent to according to session parameter；
Routing table is deleted, and is automatically selected after redundancy backup link generates corresponding routing iinformation, is modified according to the routing iinformation
APR message on the controlled exchange machine forwards behavior.
Above-mentioned computer equipment, controlled exchange machine in the opposite equip. of the controlled exchange machine not instead of domain SDN are overseas to set
It is standby, and it has modified original scheme by ARP keep-alive, is used for quickly detecting link failure between the two using BFD, because
The overseas equipment in this opposite end will also enable BFD session.The present invention mainly combines BFD and SDN, obtains overseas set by ARP information
The link position information of interchanger in standby and domain, and determine next-hop position, specific to some of device within the domain some interchanger
Then port is issued and is detected using OPENFLOW agreement carrying BFD session information.Meanwhile when link breaks down, by soft
Part control calculates the routing iinformation for generating SDN device within the domain, and SDN equipment is made to can achieve the mesh that quickly selection routes and switches
's.
In one embodiment, when computer-readable instruction is executed by processor, processor is also made to execute following steps:
It listens to after ARP failure, enables the controlled exchange machine delete the BDF session between the overseas equipment, and return
To enable detecting module according to the static routing information detecting next-hop position of configuration.
In one embodiment, when computer-readable instruction is executed by processor, processor is also made to execute following steps:
Configure static routing information；Wherein, the static routing information includes destination address；Detecting in the ARP information being locally stored is
It is no that there are the destination addresses；When in the ARP information being locally stored and be not present the destination address when, enable controlled exchange machine with
The form of multicast sends ARP message from all ports ACCESS；When there are the destination addresses in the ARP information being locally stored
When, the controller enables controlled exchange machine send ARP message from port corresponding with the destination address in the form of unicast.
In one embodiment, when computer-readable instruction is executed by processor, processor is also made to execute following steps:
After controller is according to the static routing information detecting next-hop position of its configuration, ARP message is sent according to detection result；It connects
The arp reply information that the overseas equipment is fed back after receiving the ARP message is received, and will be sent thereon to the controller；
Receive the APR message forwarding behavior of routing table and modification that the controller issues；Receive the controller is sent first
BDF session information, wherein the first BDF session information includes the BDF time parameter configured in the static routing information；
BDF session is formed, conversate negotiation and determining session parameter between the controlled exchange machine and the overseas equipment；Described
When not receiving the keep alive Packet in preset time period, judge chain occur between the controlled exchange machine and the overseas equipment
Road failure, and the link failure information is reported into the controller.
Those of ordinary skill in the art will appreciate that realizing all or part of the process in above-described embodiment method, being can be with
Relevant hardware is instructed to complete by computer program, described program can be stored in a computer-readable storage medium
In, in the embodiment of the present invention, which be can be stored in the storage medium of computer system, and by the computer system
At least one processor executes, and includes the process such as the embodiment of above-mentioned each method with realization.Wherein, the storage medium can be
Magnetic disk, CD, read-only memory (Read-Only Memory, ROM) or random access memory (Random Access
Memory, RAM) etc..
Each technical characteristic of embodiment described above can be combined arbitrarily, for simplicity of description, not to above-mentioned reality
It applies all possible combination of each technical characteristic in example to be all described, as long as however, the combination of these technical characteristics is not deposited
In contradiction, all should be considered as described in this specification.
The embodiments described above only express several embodiments of the present invention, and the description thereof is more specific and detailed, but simultaneously
It cannot therefore be construed as limiting the scope of the patent.It should be pointed out that coming for those of ordinary skill in the art
It says, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to protection of the invention
Range.Therefore, the scope of protection of the patent of the invention shall be subject to the appended claims.
Claims (11)
1. a kind of overseas chain circuit detecting method characterized by comprising
After controller is according to the static routing information detecting next-hop position of configuration, controlled exchange machine is enabled to be sent out according to detection result
Send ARP message；
The controller receives the arp reply information sent on the controlled exchange machine；Wherein, the arp reply information is overseas
The feedback information for the ARP message that equipment sends the controlled exchange machine；
The controller determines next-hop position according to the arp reply information, issues routing table simultaneously to the controlled exchange machine
Modify the APR message forwarding behavior on the controlled exchange machine；
Under what the controller received that the controlled exchange machine reports confirms after link failure information between the overseas equipment
One jump is unreachable；After the keep alive Packet generates BFD session between the overseas equipment and the controlled exchange machine, according to
Session parameter is sent to the keep alive Packet of the controlled exchange machine；
The controller deletes routing table, and automatically selects after redundancy backup link generates corresponding routing iinformation, according to institute
It states the APR message that routing iinformation is modified on the controlled exchange machine and forwards behavior.
2. the method according to claim 1, wherein described modify the controlled exchange according to the routing iinformation
After APR message forwarding behavior on machine further include:
The controller listens to after ARP failure, and the controlled exchange machine is enabled to delete the BDF meeting between the overseas equipment
Words, and it is back to the static routing information detecting next-hop position according to configuration.
3. the method according to claim 1, wherein the controller is detected according to the static routing information of configuration
After next-hop position, controlled exchange machine is enabled to send ARP message according to detection result, comprising:
Controller configures static routing information；Wherein, the static routing information includes destination address；
With the presence or absence of the destination address in the ARP information that the controller detection is locally stored；
In the ARP information being locally stored and when the destination address is not present, the controller enables controlled exchange machine with multicast
Form from all ports ACCESS send ARP message；
When, there are when the destination address, the controller enables controlled exchange machine with the shape of unicast in the ARP information being locally stored
Formula sends ARP message from port corresponding with the destination address.
4. a kind of overseas chain circuit detecting method characterized by comprising
Controlled exchange machine is after controller is according to the static routing information detecting next-hop position of its configuration, according to detection result
Send ARP message；
The controlled exchange machine receives the arp reply information that the overseas equipment is fed back after receiving the ARP message, and will
It is sent thereon to the controller；
The controlled exchange machine receives the APR message forwarding behavior of routing table and modification that the controller issues；
The controlled exchange machine receives the first BDF session information that the controller is sent, wherein the first BDF session letter
Breath includes the BDF time parameter configured in the static routing information；
BDF session is formed on the controlled exchange machine, conversate negotiation between the controlled exchange machine and the overseas equipment
And determine session parameter；
When the controlled exchange machine does not receive the keep alive Packet in the preset time period, the controlled exchange machine is judged
Occur link failure between the overseas equipment, and the link failure information is reported into the controller.
5. according to the method described in claim 4, it is characterized in that, the session parameter is according to the BDF time parameter and institute
Preset 2nd BDF session information in overseas equipment is stated to determine；The session parameter includes sending between message time, sending time
Every, minimum receiving time and detection multiple；
It is described to report to the link failure information after the controller, further includes:
The controlled exchange machine is deleted described between the overseas equipment after the controller listens to ARP failure
BDF session, and be back to and ARP message is sent according to the detection result of controller.
6. a kind of overseas link detecting device, which is characterized in that described device is located at controller end, comprising:
Detecting module enables controlled exchange machine according to spy after the static routing information detecting next-hop position according to configuration
It surveys result and sends ARP message；
First receiving module, for receiving the arp reply information sent on the controlled exchange machine；Wherein, the arp reply information
It is the feedback information for the ARP message that overseas equipment sends the controlled exchange machine；
Module is issued, for determining next-hop position according to the arp reply information, issues routing table to the controlled exchange machine
And modify the forwarding behavior of the APR message on the controlled exchange machine；
Confirmation module confirms after link failure information between the overseas equipment for receive that the controlled exchange machine reports
Next-hop is unreachable；
Module is adjusted, for deleting routing table, and is automatically selected after redundancy backup link generates corresponding routing iinformation, according to
The routing iinformation modifies the forwarding behavior of the APR message on the controlled exchange machine.
7. device according to claim 6, which is characterized in that described device further include:
Module is monitored, after listening to ARP failure, the controlled exchange machine is enabled to delete the institute between the overseas equipment
BDF session is stated, and is back to the static routing information detecting next-hop position for enabling detecting module according to configuration.
8. device according to claim 6, which is characterized in that the detecting module includes:
Submodule is configured, for configuring static routing information；Wherein, the static routing information includes destination address；
Detection sub-module, for detecting in the ARP information being locally stored with the presence or absence of the destination address；
First sending submodule, for enabling controlled exchange in the ARP information being locally stored and when the destination address is not present
Machine sends ARP message from all ports ACCESS in the form of multicast；
Second sending submodule, for when in the ARP information being locally stored there are when the destination address, the controller enable by
Controlled switching system sends ARP message from port corresponding with the destination address in the form of unicast.
9. a kind of overseas link detecting device, which is characterized in that described device is located at controlled exchange generator terminal, comprising:
Sending module, for controller according to its configuration static routing information detecting next-hop position after, according to detection
As a result ARP message is sent；
On send module, the arp reply information fed back after receiving the ARP message for receiving the overseas equipment, and will
It is sent thereon to the controller；
Second receiving module, the APR message for receiving routing table and modification that the controller issues forward behavior；
Third receiving module, the first BDF session information sent for receiving the controller, wherein the first BDF session
Information includes the BDF time parameter configured in the static routing information；
Session generation module is used to form BDF session, and conversate negotiation between the controlled exchange machine and the overseas equipment
And determine session parameter；
Breakdown judge module when for not receiving the keep alive Packet in the preset time period, judges the controlled friendship
It changes planes and occurs link failure between the overseas equipment, and the link failure information is reported into the controller.
10. a kind of computer readable storage medium, which is characterized in that be stored with computer on the computer readable storage medium
Executable instruction, when the computer executable instructions are executed by processor, so that the processor perform claim requires 1 to 5
Any one of the method the step of.
11. a kind of computer equipment, which is characterized in that including memory and processor, store computer in the memory
Readable instruction, when the computer-readable instruction is executed by the processor, so that the processor perform claim requires 1 to 5
Any one of the method the step of.
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| US20240036997A1 (en) * | 2022-07-28 | 2024-02-01 | Netapp, Inc. | Methods and systems to improve input/output (i/o) resumption time during a non-disruptive automatic unplanned failover from a primary copy of data at a primary storage system to a mirror copy of the data at a cross-site secondary storage system |
| US12019873B2 (en) | 2022-07-28 | 2024-06-25 | Netapp, Inc. | Methods and systems to improve resumption time of input/output (I/O) operations based on prefetching of configuration data and early abort of conflicting workflows during a non-disruptive automatic unplanned failover from a primary copy of data at a primary storage system to a mirror copy of the data at a cross-site secondary storage system |
| US11995041B2 (en) | 2022-10-28 | 2024-05-28 | Netapp, Inc. | Methods and systems to reduce latency of input/output (I/O) operations based on file system optimizations during creation of common snapshots for synchronous replicated datasets of a primary copy of data at a primary storage system to a mirror copy of the data at a cross-site secondary storage system |
| CN116248581A (en) * | 2022-12-29 | 2023-06-09 | 天翼云科技有限公司 | Cloud scene gateway cluster master-slave switching method and system based on SDN |
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