CN103166846B - A kind of message forwarding method and equipment - Google Patents
A kind of message forwarding method and equipment Download PDFInfo
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- CN103166846B CN103166846B CN201310103686.2A CN201310103686A CN103166846B CN 103166846 B CN103166846 B CN 103166846B CN 201310103686 A CN201310103686 A CN 201310103686A CN 103166846 B CN103166846 B CN 103166846B
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Abstract
The invention discloses a kind of message forwarding method and equipment.The method includes: after route exchange device receives message, the purpose IP address lookup corresponding down hop route according to described message；If determining according to the down hop route inquiring and forwarding described message from tunnel, then inquire about described tunnel corresponding tunnel encapsulation list item；Wherein, tunnel encapsulation list item at least includes: tunnel encapsulation information and outgoing interface information；Described route exchange device carries out tunnel encapsulation according to the tunnel encapsulation information in the tunnel encapsulation list item inquiring to described message, and the message after forwarding encapsulation according to the outgoing interface in this tunnel encapsulation list item.Use the present invention can improve tunnel encapsulation efficiency and avoid being limited by equipment packages number of times.
Description
Technical field
The present invention relates to the communications field, particularly relate to a kind of message forwarding method and equipment.
Background technology
Tunneling technique is a kind of encapsulation technology, and the data message of other procotols is sealed by i.e. a kind of procotol
It is contained in the message of oneself, then transmit in a network.The road that data message after encapsulation transmits in a network
Footpath is referred to as tunnel.Tunnel is a virtual point-to-point connection, and the two ends in tunnel need to carry out data message
Encapsulation and decapsulation.Tunneling technique refers to include that the overall process in being encapsulated in is conciliate in data encapsulation, transmission.
But application networking exists Multiple tunnel forward when, aspect of performance also can Shortcomings, be mainly reflected in following
Several aspects:
(1) in the routing procedure in tunnel, need when entering tunnel to check and once routeing, seal up after installing and finishing
Need again to check route.If nested tunnels, then routing procedure is more complicated, affects routing performance.
(2) in the encapsulation process of nested tunnels, after last layer to be waited is sealed up and is installed into every time, root
Carry out routeing sealing up dress into tunnel according to purpose IP address in IP encapsulation header, have which floor tunnel nesting to be accomplished by adding
Encapsulation several times, affects tunnel and adds encapsulation performance.
(3) need repeatedly local loopback to route during nested encapsulation, can be limited by equipment packages number of times.
As it is shown in figure 1, DUT1 needs to communicate with DUT7, there is IPv4 network and there is also in go-between
IPv6 network, DUT2 three layers of nested tunnels of upper existence, the message that DUT1 sends needs three tunnel encapsulation
It is ultimately routed to DUT7.Fig. 2 shows and carries out the flow process that three layers of nested tunnels forward, Fig. 3 on DUT2
Show that nested tunnels on DUT2 seals up the schematic diagram of dress.It can be seen that the nested forwarding process of three layer tunnel,
Experienced by altogether 4 routes and seal up dress for 3 times: original message first has to route then according to purpose IP address
Carry out tunnel and seal up dress, carry out again according to the purpose IP address after sealing up dress after dress is sealed up in tunnel for the first time
Second time route, then carries out tunnel and seals up dress, the like, original message is from entering DUT2 to going out DUT2
Experienced by altogether 3 tunnels of 4 routes and seal up dress.
Content of the invention
Embodiments provide a kind of message forwarding method and equipment, in order to improve tunnel encapsulation efficiency with
And avoid being limited by equipment packages number of times.
The message forwarding method that the embodiment of the present invention provides, comprising:
After route exchange device receives message, under purpose IP address lookup according to described message is corresponding
One jumps route；
If determining according to the down hop route inquiring and forwarding described message from tunnel, then inquire about described tunnel pair
The tunnel encapsulation list item answered；Wherein, tunnel encapsulation list item at least includes: tunnel encapsulation information and outgoing interface
Information；
Described route exchange device according to the tunnel encapsulation information in the tunnel encapsulation list item inquiring to described
Message carries out tunnel encapsulation, and forwards the message after encapsulating according to the outgoing interface in this tunnel encapsulation list item.
The route exchange device that the embodiment of the present invention provides, comprising: routing inquiring module, tunnel encapsulation list item
Enquiry module, packet forwarding module；
Routing inquiring module, for the purpose IP ground after this equipment receives message, according to described message
Location inquiry corresponding down hop route, if determining according to the down hop route inquiring and forwarding described report from tunnel
Literary composition, it indicates that the corresponding tunnel encapsulation list item of described tunnel encapsulation list item enquiry module inquiry；
Tunnel encapsulation list item enquiry module, is used for inquiring about described tunnel corresponding tunnel encapsulation list item；Wherein,
Tunnel encapsulation list item at least includes: tunnel encapsulation information and outgoing interface information；
Packet forwarding module, for according to the tunnel encapsulation information in the tunnel encapsulation list item that inquires to described
Message carries out tunnel encapsulation, and forwards the message after encapsulating according to the outgoing interface in this tunnel encapsulation list item.
In the above embodiment of the present invention, route exchange device is after receiving message, however, it is determined that need from tunnel
Forwarding, then inquiring about this tunnel corresponding tunnel encapsulation list item, the tunnel encapsulation list item encapsulation according to inquiring should
Message, and forward the message after encapsulating according to the outgoing interface in this tunnel encapsulation list item.Due to tunnel encapsulation table
Rear tunnel encapsulation information and outgoing interface information is comprised, therefore in repeating process, it is only necessary to Cha Yici road in Xiang
By entering tunnel, perform a tunnel after entering tunnel and add encapsulation operation, then further according in tunnel encapsulation list item
Outgoing interface forwards, and compared with prior art, decreases routing inquiry and tunnel encapsulation number of times, therefore improves
Message tunnel packaging efficiency, and then improve message forward efficiency.Look into further, since only need to once route
Ask and seal up the operation of dress, no longer limited by equipment packages number of times.
Brief description
Fig. 1 is nested tunnels application networking schematic diagram in prior art；
Fig. 2 is three layers of nested tunnels forwarding process schematic diagram in prior art；
Fig. 3 is that in prior art, nested tunnels seals up process of assembling schematic diagram；
The Establishing process schematic diagram of the tunnel encapsulation list item that Fig. 4 provides for the embodiment of the present invention；
Fig. 5 carries out tunnel encapsulation the schematic flow sheet forwarding for what the embodiment of the present invention provided to message；
Fig. 6 is that the nested tunnels in the embodiment of the present invention seals up dress schematic diagram；
The structural representation of the route exchange device that Fig. 7 provides for the embodiment of the present invention.
Detailed description of the invention
The embodiment of the present invention is for needing in nested tunnels repeating process in prior art repeatedly to route, repeatedly add
Encapsulation, the problem affecting forwarding performance, provide a kind of nested tunnels encapsulation scheme, in order to improve tunnel envelope
Dress efficiency, and then improve forward efficiency.
In the embodiment of the present invention, when the state in the tunnel of configuration on route exchange device is that Up(opens) after,
Generate tunnel encapsulation list item, including the tunnel encapsulation number of plies, every layer encapsulation IP head packaging information, with
And the outgoing interface information of the destination address corresponding down hop route in bottom IP head packaging information.When this
Route exchange device receives message, and determine needs after tunnel forwards, according to corresponding tunnel, this tunnel
Encapsulation list item carries out tunnel encapsulation and forwarding to this message.Above-mentioned flow process encapsulates for nested tunnels, only needs one
Secondary route (i.e. message enters the corresponding route table items of fashionable inquiry, and determines whether to forward from tunnel) and once sealing
Dress operation, and avoid because nesting encapsulation number of times causes more than the internal Routing Loop round trip number of route exchange device
The generation of retransmission failure situation.
Below in conjunction with the accompanying drawings the embodiment of the present invention is described in detail.
As shown in Figure 4, after the state in tunnel of configuration on route exchange device becomes Up, will trigger with
Lower tunnel encapsulation list item sets up process:
Step 401: the packaging information in the tunnel that this state is become Up adds corresponding tunnel, this tunnel to
In encapsulation list item, then proceed to step 402.Wherein, the tunnel encapsulation information added can include this tunnel
Source IP address and purpose IP address.
Concrete, the encapsulation list item configuration feature in tunnel can be enabled, so, when the state in this tunnel becomes
After Up, i.e. can configure this tunnel corresponding tunnel encapsulation list item.Can be by configuring flag bit on tunnel face
Enable tunnel encapsulation list item configuration feature.
Step 402: search route according to the tunnel destination address in the tunnel encapsulation information currently added.
Step 403: if the outgoing interface of this destination address corresponding down hop route is tunnel face, be shown to be
Nested tunnels, then proceed to step 404, otherwise proceed to step 405.
When implementing, for the situation that there is equal-cost route, embodiments provide several for
The routing mode of configured tunneling technique encapsulation list item process:
Mode one: the TOS field value in configuration of IP head on tunnel face in advance, different values represents difference
Routing Algorithm.Concrete, TOS field value span is 0-255, and pre-defining this field value is 100
When, corresponding routing policy is: if there is equal-cost route, then prioritizing selection tunnel face is outgoing interface, enters
One step, if there is tunnel face of equal value route, then select IP address, tunnel face little for outgoing interface；If
TOS is not equal to 100, then according to old process routing.
Mode two: the option field value in configuration of IP head on tunnel face in advance, different values represents not
Same Routing Algorithm.Concrete, it with one of Optional Field bit, is used for identifying routing mode, than
As by this bit position 0, represented and carrying out routing in a conventional manner；This bit is put 1, represents preferential
Select tunnel face to be outgoing interface, further, if there is tunnel face of equal value route, then select tunnel face IP
Address little for outgoing interface.Preferably, under default situations, this field value is 0, does not so interfere with message
The process of miscellaneous service.
Above two mode is all by instructing at configuration tunnel in tunnel face configuration Routing Algorithm instruction information
How routing during road encapsulation list item.
The packaging information in this tunnel is added by step 404: the configuration in the tunnel according to corresponding to this tunnel face
In current tunnel corresponding tunnel encapsulation list item, then proceed to step 402.
Step 405: add the outgoing interface of down hop route in this tunnel corresponding tunnel encapsulation list item to.
Added the process of tunnel encapsulation information by above iteration, for the tunnel face becoming Up with this state
For the nested tunnels of entrance, corresponding tunnel encapsulation list item can be set up.The superiors tunnel pair in nested tunnels
The tunnel encapsulation list item answered at least includes: the IP heading information of every layer of tunnel encapsulation in nested tunnels,
And the outgoing interface letter of the destination address corresponding down hop route during iteration interpolation tunnel encapsulation end of message
Breath.Optionally, may also include the tunnel encapsulation number of plies (i.e. the nested number of plies in tunnel).
It should be noted that for individual layer tunnel, it is possible to it is suitable for the embodiment of the present invention.For individual layer tunnel,
Tunnel encapsulation information in corresponding tunnel encapsulation list item is the packaging information in this tunnel, and outgoing interface information is this
The outgoing interface of the destination address corresponding down hop route in tunnel.
Preferably, the allowed maximum nested number of plies can be configured on route exchange device, and every time at tunnel
After encapsulation list item in road adds one layer of tunnel encapsulation information, will be by the tunnel encapsulation in this tunnel encapsulation list item
The number of plies is incremental, and (value of this tunnel encapsulation number of plies, from the beginning of 1, often adds one layer of tunnel encapsulation information, should
The tunnel encapsulation number of plies adds 1).Before adding tunnel encapsulation information in tunnel encapsulation list item every time, first determine whether
Whether the tunnel encapsulation number of plies in this tunnel encapsulation list item current has reached the allowed maximum nested number of plies,
If having reached, then abandoning configuring this tunnel encapsulation list item, if being also not up to, then continuing according to foregoing schemes
Configured tunneling technique encapsulates list item.
Further, it is contemplated that tunnel state or tunnel configuration may change because of a variety of causes, this
Bright embodiment additionally provides the more new technological process of tunnel encapsulation list item for this, specifically can include following several situation:
(1) when route exchange device detects the state change (source in usual tunnel in the tunnel of configuration on it
Address or destination address change, then tunnel state can change) when, then trigger and update tunnel encapsulation
The operation of list item.Concrete, when the source address in tunnel is or/and destination address changes, the shape in former tunnel
State becomes DOWN from Up, now triggers the operation performing to delete or empty corresponding tunnel encapsulation list item；When
Use the tunnel of the address after change when DOWN state becomes Up, then it is right to create according to foregoing schemes
The tunnel encapsulation list item answered.Further, if there being other tunnels nested, this state becomes the tunnel of DOWN
Road, then also to delete or to empty this other tunnels corresponding tunnel encapsulation list item, i.e. work as route exchange device
Detect that this closedown is deleted or emptied to the state in the tunnel of configuration on it, when open mode becomes closed mode,
The tunnel corresponding tunnel encapsulation list item of state, and delete or empty the tunnel in the tunnel of this closed mode of nesting
Tunnel encapsulation list item corresponding to road.
(2) when route exchange device detects under the route change i.e. of the destination address in the tunnel of configuration on it
One jumps route outgoing interface change, then trigger and update corresponding tunnel encapsulation list item.That is, when route exchange device inspection
Measure tunnel destination address down hop route outgoing interface change when, according to this tunnel update after go out to connect
This tunnel of oral replacement corresponding tunnel encapsulation list item, and update tunnel corresponding to the tunnel in this tunnel for the nesting
Encapsulation list item.Concrete, when route exchange device detects the down hop route of the destination address in individual layer tunnel
When outgoing interface changes, replace this individual layer of this individual layer tunnel and all nestings with the outgoing interface after change
The outgoing interface in tunnel encapsulation list item corresponding to the tunnel in tunnel.When route exchange device detects tunnel
The route of destination address i.e. down hop route outgoing interface changes and this tunnel is nested with other tunnels, then root
Update the corresponding tunnel, tunnel that this down hop route changes according to the down hop route outgoing interface after updating
Encapsulation list item, and update that to be nested with the tunnel institute in this tunnel (i.e. down hop route the tunnel that changes) right
The tunnel encapsulation list item answered, the operation updating tunnel encapsulation list item refers to aforesaid establishment tunnel encapsulation list item
Process.
Based on tunnel encapsulation list item, after route exchange device receives the message that user equipment sends, to this
Message carries out tunnel encapsulation and forwarding, and the encapsulation of its message tunnel and forwarding process can be as shown in Figure 5, comprising:
Step 501: the corresponding route table items of purpose IP address lookup according to this message.
Step 502: if the corresponding down hop in this purpose IP address route goes out in the route table items inquiring
Interface is tunnel face, then proceed to step 503, otherwise proceed to step 505.
Step 503: according to the tunnel indicated by the outgoing interface that this down hop route, inquire about this tunnel corresponding
Tunnel encapsulation list item.
Step 504: according to the tunnel encapsulation information in the tunnel encapsulation list item inquiring, this message is carried out
Tunnel encapsulation, and forward the message after encapsulating according to the outgoing interface in this tunnel encapsulation list item.
Further, when tunnel encapsulation is carried out to message, can be by the tunnel encapsulation layer in tunnel encapsulation list item
Number adds in outer layer IP head.So, when the message with tunnel encapsulation transmits in a network, route switching
Equipment can be according to being used for identifying the field of the tunnel encapsulation number of plies in the outer layer IP head of this message, it is judged that this message
Have passed through which floor tunnel encapsulation.The partial bit that can pre-define in IP head in Optional Field is for marking report
The tunnel encapsulation number of plies of literary composition.Preferably, could dictate that the nested number of plies maximum in allowed tunnel is 7, this kind
In the case of, 2 bits can be used to mark the tunnel encapsulation number of plies.
Step 505: forward process is carried out to this message according to conventional three layers of forwarding process.
In a kind of specific implementation using flow process shown in Fig. 5, in the step 502 of above-mentioned flow process,
When being this message routing according to route table items, it is right to select according to the value of the TOS field in message IP head
The Routing Algorithm answered.Concrete, the span of TOS field is 0-255, if TOS=100 in IP head,
Then when for message routing, if there is equal-cost route, then prioritizing selection tunnel face is outgoing interface, further
, if there is tunnel face of equal value route, then select IP address, tunnel face little for outgoing interface；If IP head
Middle TOS is not equal to 100, then when for message routing, according to old process process.Accordingly, in step
In 504, under default situations, when adding tunnel encapsulation to message, synchronization replicates TOS field in internal layer IP head
Content, it is ensured that add the message after tunnel encapsulation and process consistent with original message.
Further, it if routing result is to forward from tunnel, and is configured with Routing Algorithm on this tunnel face
Instruction information (being TOS field value here), then in step 504, carrying out tunnel envelope to this message
During dress to, the Routing Algorithm instruction information of configuration on this tunnel face is added the TOS field of tunnel encapsulation head,
For instructing the routing in the follow-up repeating process of this message.
In the another kind of specific implementation using flow process shown in Fig. 5, in the step 502 of above-mentioned flow process,
When being this message routing according to route table items, correspondence can be selected according to the option value in message IP head
Routing Algorithm.Concrete, one of option field in definable IP head bit, it is used for marking
Know routing mode, such as, by this bit position 0, represent and carry out routing in a conventional manner；By this bit
Put 1, represent that prioritizing selection tunnel face is outgoing interface, further, if there is tunnel face of equal value route,
Then select IP address, tunnel face little for outgoing interface.Preferably, under default situations, this field value is 0, this
Sample does not interferes with the process of message miscellaneous service.Accordingly, in step 504, under default situations, to report
When literary composition adds tunnel encapsulation, synchronization replicates this field contents in internal layer IP head, it is ensured that after adding tunnel encapsulation
Message processes consistent with original message.
Further, it if routing result is to forward from tunnel, and is configured with Routing Algorithm on this tunnel face
Instruction information (being option value here), then in step 504, carrying out tunnel encapsulation to this message
When, the Routing Algorithm instruction information of configuration on this tunnel face is added to the option field of tunnel encapsulation head,
For instructing the routing in the follow-up repeating process of this message.
For the clearer explanation embodiment of the present invention, below as a example by the networking shown in Fig. 1, describe in detail
The embodiment of the present invention implement process.
As it is shown in figure 1, set up 4in4 tunnel T1 between DUT2 and DUT4；DUT2 and DUT5 it
Between set up 6in4 tunnel T2, the source in T2 tunnel is T1；6in6 tunnel is set up between DUT2 and DUT6
The source in T3, T3 tunnel is T2.That is, current networking exists individual layer tunnel T1, two-layer nested tunnels T2
And three layers of nested tunnels T3.DUT1 and DUT7 is IPv6 protocol stack route exchange device.
After T1 tunnel state Up, DUT2, according to the destination address query routing in T1 tunnel, obtains purpose
The corresponding outgoing interface of address route next jump, this outgoing interface is not tunnel face, then the seedbed according to T1 tunnel
Location, destination address, the encapsulation number of plies and the corresponding outgoing interface of tunnel destination address, generate T1 tunnel corresponding
Tunnel encapsulation list item.Encapsulation number of times numerical value in this list item is 1, and outgoing interface is the destination in T1 tunnel
Outgoing interface corresponding to the route next jump of location, tunnel encapsulation content includes: the source IP address in T1 tunnel, mesh
IP address.
After T2 tunnel state Up, DUT2, according to the destination address query routing in T2 tunnel, obtains purpose
The corresponding outgoing interface in address is the T1 tunnel face of bottom, it is judged that be nested tunnels, then first add T2 tunnel
Packaging information is to this tunnel corresponding tunnel encapsulation list item, further according to this bottom tunnel (being T1 tunnel here)
Configuration add the packaging information in bottom tunnel successively, then add bottom tunnel destination address route outgoing interface,
Generate T2 tunnel corresponding tunnel encapsulation list item.Encapsulation number of times numerical value in this list item is 2, and outgoing interface is
The outgoing interface corresponding to destination address route next jump in T1 tunnel, tunnel encapsulation content includes: T1 tunnel
Source IP address, purpose IP address, and the source IP address in T2 tunnel and purpose IP address.
After T3 tunnel state Up, DUT2, according to the destination address query routing in T3 tunnel, obtains purpose
The corresponding outgoing interface in address is the T2 tunnel face of bottom, it is judged that be nested tunnels, then first add T3 tunnel
Packaging information is to this tunnel corresponding tunnel encapsulation list item, further according to bottom tunnel (being T2 tunnel here)
Configuration add T2 tunnel and the packaging information in T1 tunnel successively, then add T1 tunnel destination address route
Outgoing interface, generates T3 tunnel corresponding tunnel encapsulation list item.Encapsulation number of times numerical value in this list item is 3,
Outgoing interface is the outgoing interface corresponding to destination address route next jump in T1 tunnel, and tunnel encapsulation content includes:
The source IP address in T1 tunnel, purpose IP address, the source IP address in T2 tunnel, purpose IP address, and
The source IP address in T3 tunnel, purpose IP address.
DUT1 needs to access DUT7 by T3 tunnel.In such cases, when DUT2 connects from DUT1
After receiving IPv6 message (source of this message is 1::1, and purpose is 6::2), according to the destination address of this message
Searching corresponding route table items, determining needs to be forwarded this message by T3 tunnel, therefore inquires about T3 tunnel pair
The tunnel encapsulation list item answered, this list item includes the tunnel encapsulation information of T1, T2, T3, also includes iteration
At the end of the outgoing interface of tunnel purpose route, as shown in Figure 6, DUT2 is according to the tunnel encapsulation table inquiring
Item carries out tunnel encapsulation and (includes the encapsulation letter in T1, T2, T3 tunnel from bottom to high level successively to this message
Breath), the message after then forwarding encapsulation according to the outgoing interface in this list item.
During this message forwards in a network, in the process that the tunnel other end decapsulates, and existing
Implementation is identical, does not repeats them here.
It can be seen that in whole repeating process, after receiving original message, it is only necessary to look into and once route into tunnel
Road, performs a tunnel and adds encapsulation operation, then further according to the outgoing interface in tunnel encapsulation list item after entering tunnel
Forward, compared with prior art, decrease routing inquiry and tunnel encapsulation number of times, therefore improve message
Tunnel encapsulation efficiency, and then improve message forward efficiency.Further, since only need a routing inquiry and add
The operation of encapsulation, is no longer limited by equipment packages number of times.
Additionally, the embodiment of the present invention additionally provides the renewal handling process of tunnel encapsulation list item.Still with Fig. 1 institute
It as a example by the networking shown and tunnel configuration, is illustrated below:
If T1 tunnel DOWN, then DUT2 deletes T1 tunnel corresponding tunnel encapsulation list item；Due to T1
Tunnel is the bottom tunnel in T2 tunnel and T3 tunnel, and therefore DUT2 also deletes corresponding tunnel, T2 tunnel
Encapsulation list item and T3 tunnel corresponding tunnel encapsulation list item；
If T2 tunnel DOWN, then DUT2 deletes T2 tunnel corresponding tunnel encapsulation list item, due to T2
Tunnel is the bottom tunnel in T3 tunnel, and therefore DUT2 also deletes T3 tunnel corresponding tunnel encapsulation list item；
If T3 tunnel DOWN, then DUT2 deletes T3 tunnel corresponding tunnel encapsulation list item；
If the down hop route outgoing interface of the purpose IP address in T1 tunnel changes, then DUT2 updates
Down hop route outgoing interface in T1 tunnel corresponding tunnel encapsulation list item；Owing to T1 tunnel is T2 tunnel
With the bottom tunnel in T3 tunnel, therefore DUT2 also updates the corresponding tunnel in T2 tunnel and T3 tunnel envelope
Down hop route outgoing interface in dress list item；
If the purpose IP address in T2 tunnel down hop route outgoing interface change, then DUT2 according to
Down hop route outgoing interface after T2 tunnel updates updates T2 tunnel corresponding tunnel encapsulation list item, due to
T3 tunnel is embedded with T2 tunnel, and therefore DUT2 also updates T3 tunnel corresponding tunnel encapsulation list item.Ratio
As the down hop route outgoing interface of the purpose IP address in T2 tunnel is updated to the tunnel face (T4 in T4 tunnel
Tunnel is individual layer tunnel), then DUT2 is by the tunnel encapsulation information updating in the tunnel encapsulation list item in T2 tunnel
For: being followed successively by packaging information, the packaging information in T2 tunnel in T4 tunnel from bottom to high level, outgoing interface is
The down hop route outgoing interface of the destination address in T4 tunnel, by the tunnel in the tunnel encapsulation list item in T3 tunnel
Packaging information is updated to: be followed successively by the packaging information in T4 tunnel, the encapsulation letter in T2 tunnel from bottom to high level
Breath, the packaging information in T3 tunnel, outgoing interface is the down hop route outgoing interface of the destination address in T4 tunnel.
Based on identical technology design, the present invention implements to additionally provide a kind of route exchange device.
See Fig. 7, for the structural representation of the route exchange device that the embodiment of the present invention provides.As it can be seen,
This route exchange device mays include: routing inquiring module the 71st, tunnel encapsulation list item enquiry module the 72nd, message
Forwarding module 73, further, also includes tunnel encapsulation list item processing module 74, wherein:
Routing inquiring module 71, for after this equipment receives message, according to purpose IP of described message
The corresponding down hop of address lookup route, if according to the down hop route inquiring determines and forwards from tunnel
Message, it indicates that tunnel encapsulation list item enquiry module 72 inquires about corresponding tunnel encapsulation list item；
Tunnel encapsulation list item enquiry module 72, is used for inquiring about described tunnel corresponding tunnel encapsulation list item；Wherein,
Tunnel encapsulation list item at least includes: tunnel encapsulation information and outgoing interface information；
Packet forwarding module 73, for the tunnel encapsulation information in the tunnel encapsulation list item that basis inquires to institute
State message and carry out tunnel encapsulation, and forward the message after encapsulating according to the outgoing interface in this tunnel encapsulation list item.
Concrete, if the outgoing interface that the down hop that routing inquiring module 71 inquires route is tunnel face, then
Determine and forward described message from corresponding tunnel, described tunnel face.
Concrete, if the down hop route that routing inquiring module 71 inquires does not exists equal-cost route, and go out
Interface is tunnel face, it is determined that forward described message from corresponding tunnel, described tunnel face；Or, if inquiry
To down hop route there is equal-cost route, and outgoing interface includes tunnel face, then judge described message is
The no Routing Algorithm that carries indicates information, if carrying, it is determined that forward described from corresponding tunnel, described tunnel face
Message, the Routing Algorithm carrying in wherein said message indicates information, there are the feelings of equal-cost route for instruction
Under condition, prioritizing selection tunnel face is outgoing interface.
Further, packet forwarding module 73 is additionally operable to: if routing inquiring module 71 is according to inquiring down
One jumps route determines from the described message of tunnel forwarding, and is configured with Routing Algorithm on the tunnel face in described tunnel
Instruction information, then add the tunnel encapsulation of described message to by the Routing Algorithm instruction information configuring on tunnel face
In；Wherein, on described tunnel face, the Routing Algorithm of configuration indicates information, there is equal-cost route for instruction
In the case of, prioritizing selection tunnel face is outgoing interface.
Further, tunnel encapsulation list item also includes encapsulate number of plies information.Packet forwarding module 73 is at root
When tunnel encapsulation being carried out to described message according to the tunnel encapsulation information in the tunnel encapsulation list item inquiring, also will
Encapsulation number of plies Information encapsulation in this tunnel encapsulation list item is in described message.
Concrete, tunnel encapsulation list item processing module 74 can set up tunnel encapsulation list item according to following steps:
Step A: when the state tunnel of configuration on it being detected becomes open mode, by this open mode
The packaging information in tunnel add in this tunnel corresponding tunnel encapsulation list item；
Step B: according to the corresponding down hop of purpose IP address lookup in the current tunnel encapsulation information added
Route, if determining that corresponding outgoing interface is tunnel face according to the down hop route inquiring, then proceeds to step C,
Otherwise proceed to step D；
Step C: the packaging information in corresponding for the tunnel face inquiring tunnel is added to the tunnel of this open mode
In road corresponding tunnel encapsulation list item, then proceed to step B；
Step D: the outgoing interface of down hop route is added to the corresponding tunnel encapsulation in tunnel of this open mode
In list item；
Wherein, the tunnel encapsulation information added includes source IP address and the purpose IP address in tunnel.
Concrete, tunnel encapsulation list item processing module 74 specifically for: if the down hop inquiring route not
There is equal-cost route, and outgoing interface is tunnel face, it is determined that the corresponding outgoing interface of down hop route is tunnel face；
Or, if the down hop route inquiring exists equal-cost route, and currently add the tunnel of tunnel encapsulation information
It is configured with Routing Algorithm instruction information on the tunnel face in road, then in equal-cost route, there is the situation of tunnel face
Under, indicate that information selects tunnel face as the current tunnel adding tunnel encapsulation information according to described Routing Algorithm
Outgoing interface, wherein, the Routing Algorithm instruction information of configuration on described tunnel face, be used for indicating existence equivalence
In the case of route, prioritizing selection tunnel face is outgoing interface.
Further, tunnel encapsulation list item also includes encapsulate number of plies information.Accordingly, tunnel encapsulation list item
Processing module 74 is before adding tunnel encapsulation information in tunnel encapsulation list item to, it is judged that this tunnel encapsulation
Whether the encapsulation number of plies in list item has reached the allowed maximum encapsulation number of plies, if it is determined that this tunnel encapsulation table
The encapsulation number of plies in Xiang has reached the allowed maximum encapsulation number of plies, then abandon setting up this tunnel encapsulation table
?；After adding tunnel encapsulation information to tunnel encapsulation list item, update the envelope in this tunnel encapsulation list item
Dress number of plies information.
Further, tunnel encapsulation list item processing module 74 is additionally operable to: if the tunnel of configuration on it being detected
State become closed mode from open mode, then delete the tunnel corresponding tunnel encapsulation table of this closed mode
, and delete the tunnel encapsulation list item corresponding to tunnel being nested with this closed mode tunnel；If tunnel being detected
The outgoing interface change of the down hop route of the destination address in road, and determine that this tunnel is individual layer tunnel, then basis
Outgoing interface after this tunnel updates updates this tunnel corresponding tunnel encapsulation list item, and renewal is nested with this tunnel
The tunnel encapsulation list item corresponding to tunnel；If detect the destination address in tunnel down hop route go out to connect
Mouth change, and determine that this tunnel is nested with other tunnels, then according to the down hop route outgoing interface after renewal more
This tunnel new corresponding tunnel encapsulation list item, and update the tunnel encapsulation corresponding to tunnel being nested with this tunnel
List item.
In sum, the embodiment of the present invention can realize techniques below effect:
(1) routing procedure after dress is sealed up in tunnel compared with prior art, is saved, directly according to tunnel mesh
The outgoing interface of address determine route next jump, improve routing performance.
(2) compared with prior art, nested tunnels is repeatedly sealed up process of assembling and is saved 1 time, improves tunnel
Add encapsulation performance, thus improve forwarding performance.
(3) encapsulation in the embodiment of the present invention equally applicable individual layer tunnel, compared with prior art, can omit
Seal up a routing procedure after dress.
(4) will not be limited by device interior Routing Loop round trip number again.
(5) embodiment of the present invention does not affect the properly functioning of existing tunnel forwarding capability.
Through the above description of the embodiments, those skilled in the art is it can be understood that arrive the present invention
The mode of required general hardware platform can be added by software to realize, naturally it is also possible to by hardware, but very
In the case of Duo, the former is more preferably embodiment.Based on such understanding, technical scheme is substantially
The part contributing prior art in other words can embody with the form of software product, this computer
Software product is stored in a storage medium, including some instructions are with so that a station terminal equipment is (permissible
It is mobile phone, personal computer, server, or the network equipment etc.) perform described in each embodiment of the present invention
Method.
The above is only the preferred embodiment of the present invention, it is noted that common for the art
For technical staff, under the premise without departing from the principles of the invention, some improvements and modifications can also be made,
These improvements and modifications also should regard protection scope of the present invention.
Claims (14)
1. a message forwarding method, it is characterised in that include:
After route exchange device receives message, under purpose IP address lookup according to described message is corresponding
One jumps route；
If determining according to the down hop route inquiring and forwarding described message from tunnel, then inquire about described tunnel pair
The tunnel encapsulation list item answered；Wherein, tunnel encapsulation list item at least includes: tunnel encapsulation information, encapsulated layer
Number information and outgoing interface information；
Described route exchange device is according to the tunnel encapsulation information in the tunnel encapsulation list item inquiring and encapsulation
Number of plies information carries out tunnel encapsulation to described message, and forwards envelope according to the outgoing interface in this tunnel encapsulation list item
Message after dress.
2. the method for claim 1, it is characterised in that the down hop road that described basis inquires
Forwarded described message from tunnel by determining, specifically include:
If the down hop route inquiring does not exists equal-cost route, and outgoing interface is tunnel face, it is determined that from institute
State corresponding tunnel, tunnel face and forward described message；
Or, if the down hop route inquiring exists equal-cost route, and outgoing interface includes tunnel face, then
Judge whether described message carries Routing Algorithm instruction information, if carrying, it is determined that from described tunnel face pair
The tunnel answered forwards described message, and the Routing Algorithm carrying in wherein said message indicates information, is used for indicating
In the case of there is equal-cost route, prioritizing selection tunnel face is outgoing interface.
3. method as claimed in claim 2, it is characterised in that described method also includes:
If determine according to the down hop route inquiring and forward described message from tunnel, and the tunnel in described tunnel
It is configured with Routing Algorithm instruction information on road junction, then the Routing Algorithm instruction information configuring on tunnel face is added
In the tunnel encapsulation of described message；Wherein, on described tunnel face, the Routing Algorithm of configuration indicates information, uses
In the case that instruction exists equal-cost route, prioritizing selection tunnel face is outgoing interface.
4. the method for claim 1, it is characterised in that tunnel encapsulation list item set up process,
Including:
Step A: when described route exchange device detects that the state in the tunnel of configuration on it becomes open mode
When, the packaging information in the tunnel of this open mode is added in this tunnel corresponding tunnel encapsulation list item；
Step B: described route exchange device is according to the purpose IP address in the current tunnel encapsulation information added
Inquire about corresponding down hop route, if determining that corresponding outgoing interface is tunnel according to the down hop route inquiring
Mouthful, then proceed to step C, otherwise proceed to step D；
Step C: the packaging information in the corresponding tunnel, tunnel face inquiring is added by described route exchange device
In the tunnel corresponding tunnel encapsulation list item of this open mode, then proceed to step B；
Step D: described route exchange device adds the outgoing interface that down hop route the tunnel of this open mode to
In road corresponding tunnel encapsulation list item；
Wherein, the tunnel encapsulation information added includes source IP address and the purpose IP address in tunnel.
5. method as claimed in claim 4, it is characterised in that in described step B, according to inquiring
Down hop route determine whether corresponding outgoing interface is tunnel face, specifically includes:
If the down hop route inquiring does not exists equal-cost route, and outgoing interface is tunnel face, it is determined that next
Jumping the corresponding outgoing interface of route is tunnel face；
Or, if the down hop route inquiring exists equal-cost route, and currently add tunnel encapsulation information
Tunnel tunnel face on be configured with Routing Algorithm instruction information, then in equal-cost route, there are the feelings of tunnel face
Under condition, indicate that information selects tunnel face as the current tunnel adding tunnel encapsulation information according to described Routing Algorithm
The outgoing interface in road, wherein, the Routing Algorithm instruction information of configuration on described tunnel face, it is used for indicating existence etc.
In the case of valency route, prioritizing selection tunnel face is outgoing interface.
6. method as claimed in claim 4, it is characterised in that also include encapsulation in tunnel encapsulation list item
Number of plies information；Described method also includes:
Before adding tunnel encapsulation information in tunnel encapsulation list item to, it is judged that in this tunnel encapsulation list item
Whether the encapsulation number of plies has reached the allowed maximum encapsulation number of plies, if it is determined that the envelope in this tunnel encapsulation list item
The dress number of plies has reached the allowed maximum encapsulation number of plies, then abandon setting up this tunnel encapsulation list item；
After adding tunnel encapsulation information to tunnel encapsulation list item, update the envelope in this tunnel encapsulation list item
Dress number of plies information.
7. the method for claim 1, it is characterised in that described method also includes:
If described route exchange device detects that the state in the tunnel of configuration on it becomes closing from open mode
State, then delete the tunnel corresponding tunnel encapsulation list item of this closed mode, and deletion is nested with this closedown shape
Tunnel encapsulation list item corresponding to the tunnel in state tunnel；
If described route exchange device detects the outgoing interface change of the down hop route of the destination address in tunnel,
And determining that this tunnel is individual layer tunnel, then the outgoing interface after updating according to this tunnel updates the corresponding tunnel in this tunnel
Road encapsulates list item, and updates the tunnel encapsulation list item corresponding to tunnel being nested with this tunnel；
If described route exchange device detects the outgoing interface change of the down hop route of the destination address in tunnel,
And determine that this tunnel is nested with other tunnels, then update this tunnel according to the down hop route outgoing interface after renewal
Corresponding tunnel encapsulation list item, and update the tunnel encapsulation list item corresponding to tunnel being nested with this tunnel.
8. a route exchange device, it is characterised in that include: routing inquiring module, tunnel encapsulation table
Item enquiry module, packet forwarding module；
Routing inquiring module, for the purpose IP ground after this equipment receives message, according to described message
Location inquiry corresponding down hop route, if determining according to the down hop route inquiring and forwarding described report from tunnel
Literary composition, it indicates that the corresponding tunnel encapsulation list item of described tunnel encapsulation list item enquiry module inquiry；
Tunnel encapsulation list item enquiry module, is used for inquiring about described tunnel corresponding tunnel encapsulation list item；Wherein,
Tunnel encapsulation list item at least includes: tunnel encapsulation information, encapsulation number of plies information and outgoing interface information；
Packet forwarding module, for according to the tunnel encapsulation information in the tunnel encapsulation list item inquiring and encapsulation
Number of plies information carries out tunnel encapsulation to described message, and forwards envelope according to the outgoing interface in this tunnel encapsulation list item
Message after dress.
9. route exchange device as claimed in claim 8, it is characterised in that described routing inquiring module
Specifically for if the down hop route inquiring does not exists equal-cost route, and outgoing interface is tunnel face, then really
Fixed from the described message of corresponding tunnel, described tunnel face forwarding；
Or, if the down hop route inquiring exists equal-cost route, and outgoing interface includes tunnel face, then
Judge whether described message carries Routing Algorithm instruction information, if carrying, it is determined that from described tunnel face pair
The tunnel answered forwards described message, and the Routing Algorithm carrying in wherein said message indicates information, is used for indicating
In the case of there is equal-cost route, prioritizing selection tunnel face is outgoing interface.
10. route exchange device as claimed in claim 9, it is characterised in that described packet forwarding module
It is additionally operable to, if described routing inquiring module determines according to the down hop route inquiring forwards described report from tunnel
It is configured with Routing Algorithm instruction information, then by configuration on tunnel face on literary composition, and the tunnel face in described tunnel
Routing Algorithm instruction information is added in the tunnel encapsulation of described message；Wherein, configuration on described tunnel face
Routing Algorithm indicates information, and in the case of there is equal-cost route for instruction, prioritizing selection tunnel face is for going out to connect
Mouthful.
11. route exchange devices as claimed in claim 8, it is characterised in that also include:
Tunnel encapsulation list item processing module, for setting up tunnel encapsulation list item according to following steps:
Step A: when the state tunnel of configuration on it being detected becomes open mode, by this open mode
The packaging information in tunnel add in this tunnel corresponding tunnel encapsulation list item；
Step B: according to the corresponding down hop of purpose IP address lookup in the current tunnel encapsulation information added
Route, if determining that corresponding outgoing interface is tunnel face according to the down hop route inquiring, then proceeds to step C,
Otherwise proceed to step D；
Step C: the packaging information in corresponding for the tunnel face inquiring tunnel is added to the tunnel of this open mode
In road corresponding tunnel encapsulation list item, then proceed to step B；
Step D: the outgoing interface of down hop route is added to the corresponding tunnel encapsulation in tunnel of this open mode
In list item；
Wherein, the tunnel encapsulation information added includes source IP address and the purpose IP address in tunnel.
12. route exchange devices as claimed in claim 11, it is characterised in that described tunnel encapsulation table
Item processing module is specifically for if the down hop route inquiring does not exists equal-cost route, and outgoing interface is tunnel
Road junction, it is determined that the corresponding outgoing interface of down hop route is tunnel face；Or, if the down hop road inquiring
It by there is equal-cost route, and is configured with routing on the tunnel face in the tunnel currently adding tunnel encapsulation information and calculates
Method indicates information, then, in the case of there is tunnel face in equal-cost route, indicate letter according to described Routing Algorithm
Breath selects tunnel face as the outgoing interface in the current tunnel adding tunnel encapsulation information, wherein, and described tunnel face
The Routing Algorithm instruction information of upper configuration, in the case of there is equal-cost route for instruction, prioritizing selection tunnel
Mouth is outgoing interface.
13. route exchange devices as claimed in claim 11, it is characterised in that in tunnel encapsulation list item
Also include encapsulating number of plies information；
Described tunnel encapsulation list item processing module is additionally operable to, and is adding tunnel encapsulation information to tunnel encapsulation table
Before in Xiang, it is judged that whether the encapsulation number of plies in this tunnel encapsulation list item has reached allowed maximum encapsulation
The number of plies, if it is determined that the encapsulation number of plies in this tunnel encapsulation list item has reached the allowed maximum encapsulation number of plies,
Then abandon setting up this tunnel encapsulation list item；After adding tunnel encapsulation information to tunnel encapsulation list item, more
Encapsulation number of plies information in this tunnel encapsulation list item new.
14. route exchange devices as claimed in claim 11, it is characterised in that described tunnel encapsulation table
Item processing module is additionally operable to:
If detecting, the state in the tunnel of configuration on it becomes closed mode from open mode, then delete this closedown
The tunnel corresponding tunnel encapsulation list item of state, and delete corresponding to the tunnel being nested with this closed mode tunnel
Tunnel encapsulation list item；
If the outgoing interface change of the down hop route of the destination address in tunnel being detected, and determine that this tunnel is single
Layer tunnel, then the outgoing interface after updating according to this tunnel updates this tunnel corresponding tunnel encapsulation list item, and more
It is newly nested with the tunnel encapsulation list item corresponding to the tunnel in this tunnel；
If the outgoing interface change of the down hop route of the destination address in tunnel being detected, and determine that this tunnel is nested
Have other tunnels, then update this tunnel corresponding tunnel encapsulation table according to the down hop route outgoing interface after renewal
, and update the tunnel encapsulation list item corresponding to tunnel being nested with this tunnel.
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| US9584443B2 (en) | 2014-08-08 | 2017-02-28 | Pismo Labs Technology Limited | Methods and systems for transmitting data through an aggregated connection |
| US10218467B2 (en) | 2009-12-23 | 2019-02-26 | Pismo Labs Technology Limited | Methods and systems for managing error correction mode |
| US9787501B2 (en) | 2009-12-23 | 2017-10-10 | Pismo Labs Technology Limited | Methods and systems for transmitting packets through aggregated end-to-end connection |
| CN104767684B (en) * | 2014-01-03 | 2018-12-11 | 腾讯科技（深圳）有限公司 | Data transmission method and relevant apparatus and communication system |
| GB2532587B (en) * | 2014-08-08 | 2021-08-04 | Pismo Labs Technology Ltd | Methods and systems for transmitting data through an aggregated connection |
| CN108111385B (en) * | 2017-12-28 | 2021-04-27 | 新华三技术有限公司 | Message forwarding method and device |
| CN109743256B (en) * | 2019-03-22 | 2022-01-14 | 成都西加云杉科技有限公司 | Message forwarding method and device |
| CN113132250B (en) * | 2019-12-31 | 2023-05-05 | 奇安信科技集团股份有限公司 | Data packet transmission method, device, electronic equipment and medium |
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