CN102035739B - Notification method and device for interface address and routing equipment - Google Patents
Notification method and device for interface address and routing equipment Download PDFInfo
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Abstract
The invention discloses a notification method and a notification device for an interface address and routing equipment. The method comprises the following steps of: when an address addition message needs to be sent to a multiprotocol label switching (LDP) neighbor, judging whether the address addition message is sent to the LDP neighbor for the interface address; and when determining that the address addition message is not sent to the LDP neighbor for the interface address, carrying the interface address in the address addition message to notify the LDP neighbor. Under the condition that the interface address is borrowed, namely the same interface address is used by a plurality of interfaces, the problem that an LDP session is abnormal because the address addition message is sent to the LDP neighbor for the same interface address repeatedly to cause address conflict is solved.
Description
Technical field
The present invention relates to the computer network communication technology field, relate in particular to a kind of notifying method, device and routing device of interface IP address.
Background technology
Existing tag distribution protocol (Multiprotocol Label Switching; LDP) in the LDP address administration process of agreement; The routing device of operation LDP agreement is under the situation that receives the interpolation announcement of local interface address; Perhaps transfer under the situation that is in unlatching (UP) state by being in the DOWN state at local LDP interface; Need add message to the address that LDP neighbours send the corresponding interface address, LDP peer is when the new LDP session of creating is in the UP state in this locality, need the address all pass through in local all IP addresses that are in the interface of UP state and add message announcement to all LDP neighbours.
Correspondingly; Transfer under the situation of closing (DOWN) state by the UP state at interface; Or under the situation of receiving the deletion announcement of local interface address, need send the address withdraw message of corresponding IP address to its all LDP neighbours, notify its LDP neighbours to delete the corresponding address record.
Under the common situation; Distinct interface on the same routing device can not dispose identical IP address; Promptly add in the message in different address; Can not carry identical IP address, just can realize the address message management between the LDP neighbours through address interpolation message and the address withdraw message described among the RFC3036.
But the situation that also has the unnumbered interface address in the prior art does not for example have numbering (unnumbered) interface, do not have the numbering interface and only start the IP agreement, but distributing IP address not, not having the numbering interface needs related actual interface with IP address.Do not have the IP packet that the numbering interface produces, the source IP address of this packet is the IP address of associated interface, and according to the IP address of associated interface, whether decision does not send route updating packet toward there being the numbering interface to routing protocol process yet in addition.
Because the IP address that the unnumbered interface can be used other interfaces, may exist on the equipment for the routing device of supporting the unnumbered interface so has a plurality of interfaces to have the situation of identical ip addresses.If the shared IP address of a plurality of interfaces; According to the notifying method of present interfaces address, the address of carrying identical ip addresses may occur repeatedly sending and add message and cause address conflict and cause moving the router of LDP agreement and abnormal conditions appear in the LDP session between its LDP neighbours.
In addition; Notifying method according to the present interfaces address; If the shared IP address of a plurality of interfaces; Because this interface is in the DOWN state and sends address withdraw message and LDP neighbours when having deleted this shared IP address, the interface of other shared these addresses can't re-use this IP address and LDP neighbours communicate when the IP address of one of them interface.
Summary of the invention
The embodiment of the invention provides a kind of notifying method, device and routing device of interface IP address, in order to realize the announcement of correct interface IP address on the routing device of using in the supporting interface address.
The notifying method of the interface IP address that the embodiment of the invention provides comprises:
When tag distribution protocol LDP neighbours send address interpolation message, judge whether the corresponding announcement sign of this interface IP address has been set to effectively at needs; If confirm that then sending the address to this interface IP address to LDP neighbours adds message; If not, confirm that then not sending the address to this interface IP address to LDP neighbours adds message;
Confirming not to be directed against this interface IP address when LDP neighbours sent address interpolation message, this interface IP address is carried in the address interpolation message announces to LDP neighbours.
The means for signalling of the interface IP address that the embodiment of the invention provides comprises:
Judging unit is used at needs when tag distribution protocol LDP neighbours send address interpolation message, judges whether the corresponding announcement sign of this interface IP address has been set to effectively; If confirm that then sending the address to this interface IP address to LDP neighbours adds message; If not, confirm that then not sending the address to this interface IP address to LDP neighbours adds message;
Notification unit is used for confirming not to be directed against this interface IP address when LDP neighbours sent address interpolation message at judging unit, this interface IP address is carried in the address interpolation message announces to LDP neighbours.
The embodiment of the invention provides a kind of routing device, comprises the means for signalling of the above-mentioned interface IP address that the embodiment of the invention provides.
The beneficial effect of the embodiment of the invention comprises:
The notifying method of the interface IP address that inventive embodiments provides, device and routing device; Send the address when adding message at needs to LDP neighbours; Judge whether to be directed against this interface IP address and sent address interpolation message,, this interface IP address is carried in the address interpolation message announces to LDP neighbours if judgement was directed against this interface IP address when LDP neighbours sent address interpolation message to LDP neighbours; Like this; Use at interface IP address, just a plurality of interfaces all use under the situation of same interface IP address, avoid repeatedly sending address interpolation message to same interface IP address to LDP neighbours and cause address conflict to make the LDP session problem of abnormal conditions occur.
Description of drawings
The flow chart of the notifying method of the interface IP address that Fig. 1 provides for the embodiment of the invention;
The flow chart of the notifying method of the A situation lower interface address that Fig. 2 provides for the embodiment of the invention;
The flow chart of the notifying method of the B situation lower interface address that Fig. 3 provides for the embodiment of the invention;
The flow chart of the notifying method of the C situation lower interface address that Fig. 4 provides for the embodiment of the invention;
The flow chart of the notifying method of the D situation lower interface address that Fig. 5 provides for the embodiment of the invention;
The flow chart of the notifying method of the E situation lower interface address that Fig. 6 provides for the embodiment of the invention;
The structural representation of the means for signalling of the interface IP address that Fig. 7 provides for the embodiment of the invention.
Embodiment
Below in conjunction with accompanying drawing, the embodiment of notifying method, device and the routing device of a kind of interface IP address that the embodiment of the invention is provided is at length explained.
The notifying method of the interface IP address that the embodiment of the invention provides, as shown in Figure 1, this method comprises the steps:
S101, send the address when adding message to LDP neighbours, judge whether that sending the address to this interface IP address to LDP neighbours adds message at needs; If judge that not sending the address to this interface IP address to LDP neighbours adds message, then carries out following step S102; Otherwise turn to step S103;
S102, this interface IP address is carried at the address adds in the message and announce to LDP neighbours;
S103, process ends;
In above-mentioned steps S101; Through judging whether the corresponding announcement sign of this interface IP address has been set to effectively judge whether that sending the address to this interface IP address to LDP neighbours adds message; Judging that the corresponding announcement sign of this interface IP address has been set to when effective; Confirm that then sending the address to this interface IP address to LDP neighbours adds message, otherwise confirm that not sending the address to this interface IP address to LDP neighbours adds message.
The corresponding announcement sign of this interface IP address has been set to effectively judging, and this interface IP address is carried at the address is adding in the message and announce to LDP neighbours, also need carry out the corresponding announcement sign of this interface IP address and be set to effective step.
In the embodiment of the invention; It is to be arranged in advance among the data structure of interface IP address that announcement identifies; Each interface IP address is announcement sign of correspondence all, and it was worth for false (non-effective), sent address interpolation message to this interface IP address after when this announced sign initialization; Need to announce sign and be set to a specific value (effectively), this specific value characterizes and sent address interpolation message to this interface IP address.
In embodiments of the present invention, need send the address to LDP neighbours adds the situation of message and comprises:
A, receive the situation that announcement is added in the local interface address; The local interface address is added and to be announced the announcement that produces in this locality under the situation such as interface IP address normally changes.
B, local interface are become the situation of UP state by the DOWN state;
C, the local new LDP session of creating are in the situation of UP state.
Below respectively to above-mentioned three kinds of situation, the notifying method of the interface IP address that the embodiment of the invention is provided is elaborated.
For the A situation:
As shown in Figure 2, the notifying method of this situation lower interface address specifically comprises the steps:
S201, receive interface IP address and add announcement;
S202, search whether there is the corresponding address record, if there is not execution in step S203; Carry out following step S204 if exist;
S203, write down this interface IP address; Execution in step S204 then;
S204, judge whether the corresponding interface of this interface IP address is in the UP state;
If this interface IP address to a plurality of interfaces should be arranged, needs one by one the state of each interface to be judged, only just can carry out following step S205 for the interface that is in the UP state, otherwise, turn to execution in step S208;
S205, judge whether the announcement sign (SEND_FLAG) of this interface IP address is set to effectively, if not, the further following step S206 of execution then; If then turn to execution in step S208;
S206, this interface IP address is carried at the address adds in the message announcement to all LDP neighbours;
S207, the announcement sign that this interface IP address is corresponding are set to effectively carry out following step S208 then;
S208, process ends.
For the B situation:
As shown in Figure 3, the notifying method of this situation lower interface address specifically comprises the steps:
S301, local interface become the UP state;
S302, to this interface each interface IP address down, judge whether the corresponding announcement sign of this interface IP address is set to effective; If not, carry out following step S303, otherwise, following step S306 carried out;
S303, this interface IP address is carried at the address adds in the message announcement to all LDP neighbours; Execution in step S304 then;
S304, the announcement sign that this interface IP address is corresponding are set to effectively turn to execution in step S305 then;
S305, judge that whether this interface is to there being other interface IP addresses; If turn to execution in step S302; If not, execution in step S306;
S306, process ends.
For the C situation:
As shown in Figure 4, the notifying method of this situation lower interface address specifically comprises the steps:
S401, new LDP session are in the UP state;
The announcement sign of the correspondence of S402, the current total interface of cancellation address;
S403, travel through the corresponding interface IP address of each interface, judge whether the announcement sign of this interface IP address is set to effectively; If, carry out following step S406, otherwise, following step S404 carried out;
S404, this interface IP address is carried at the address adds in the message announcement to all LDP neighbours; Execution in step S405 then;
S405, the announcement sign that this interface IP address is corresponding are set to effectively turn to execution in step S406 then;
S406, judgement are worked as front port and whether are also had other corresponding interface IP addresses, if, turn to execution in step S403, otherwise, execution in step S407;
S407 judges whether also to exist other interfaces to be untreated, if, turn to execution in step S403, otherwise, execution in step S408;
S408, process ends.
The notifying method of the interface IP address that the embodiment of the invention provides when LDP neighbours send address withdraw message, judges whether this interface IP address is gone back related other and be in the interface of UP state at needs; When judging this interface IP address related other are not in the interface of UP state, this interface IP address is carried in the address withdraw message announces to LDP neighbours.
Announce in the address withdraw message to LDP neighbours saying that this interface IP address is carried at, also need carry out the corresponding announcement sign of this interface IP address of cancellation, and the step of deleting this interface IP address.
In embodiments of the present invention, need there be following two kinds to the situation that LDP neighbours send address withdraw message:
D, delete certain interface IP address;
E, certain interface are changed into the state of DOWN by UP;
Carry out detailed explanation to above-mentioned two kinds of situation respectively below.
For the D situation, the notifying method of the interface IP address that the embodiment of the invention provides, as shown in Figure 5, comprise the steps:
Whether related other are in the interface of UP state to this interface IP address that S501, judgement need be deleted; If not, then carry out following step S502, if turn to and carry out following step S505;
S502, this interface IP address is carried in the address withdraw message announcement to all LDP neighbours;
S503, the announcement sign that this interface IP address of cancellation record is corresponding in this locality;
S504, at this interface IP address of this locality deletion; Execution in step S505 then;
S505, process ends.
For the E situation, the notifying method of the interface IP address that the embodiment of the invention provides, as shown in Figure 6, comprise the steps:
Each corresponding interface IP address of interface of DOWN state appears in S601, traversal; For each interface IP address, judge whether related other are in the interface of UP state to this interface IP address; If not, then carry out following step S602, if turn to and carry out following step S605;
S602, this interface IP address is carried at announces in the address withdraw message to LDP neighbours;
S603, the announcement sign that this interface IP address of cancellation record is corresponding in this locality;
S604, at this interface IP address of this locality deletion; Carry out following step S605 then;
S605, judge that this interface whether also to other interface IP addresses should be arranged, if having, turns to execution in step S601; If do not have, carry out following step S606;
S606, process ends.
Based on same inventive concept; The embodiment of the invention also provides a kind of means for signalling and routing device of interface IP address; Because these devices are similar with the notifying method of aforementioned a kind of interface IP address with the principle that equipment is dealt with problems; Therefore the enforcement of these devices and equipment can repeat part and repeat no more referring to the enforcement of method.
The means for signalling of a kind of interface IP address that the embodiment of the invention provides, as shown in Figure 7, comprising:
Judging unit 701 is used at needs when LDP neighbours send address interpolation message, judging whether that sending the address to this interface IP address to LDP neighbours adds message;
Notification unit 702 is used for being directed against this interface IP address when LDP neighbours sent address interpolation message in judging unit 701 judgements, this interface IP address is carried in the address interpolation message announces to LDP neighbours.
Further, above-mentioned judging unit 701 is used for through judging whether the corresponding announcement sign of this interface IP address has been set to effectively; If confirm that then sending the address to this interface IP address to LDP neighbours adds message; If not, confirm that then not sending the address to this interface IP address to LDP neighbours adds message.
Further; The means for signalling of the interface IP address that the embodiment of the invention provides; As shown in Figure 7; Can also comprise: the announcement sign is provided with unit 703, is used in notification unit 702 this interface IP address being carried at address message and announces to LDP neighbours' step, and the announcement of this interface IP address sign is set to effectively.
Further; The new LDP session of creating is under the UP state status in this locality, and this judging unit 701 is further used for local each interface of traversal; To each corresponding interface IP address of each interface, judge whether the announcement sign of this interface IP address has been set to effectively;
Said announcement sign is provided with unit 703, also is used for before local each interface of judging unit 701 traversals the announcement sign that the total interface address of the local storage of cancellation is corresponding.
Further, above-mentioned judging unit 701 also is used at needs when LDP neighbours send address withdraw message, judges whether this interface IP address is gone back related other and be in the interface of UP state;
Correspondingly, said notification unit 702 also is used for when said judging unit 701 is judged these interface IP addresses related other are not in the interface of UP state, this interface IP address is carried in the address withdraw message announces to LDP neighbours.
Further, the means for signalling of the interface IP address that the embodiment of the invention provides, as shown in Figure 7, can also comprise: address delete cells 704;
Said announcement sign is provided with unit 703, also is used in said notification unit 702 this interface being carried at address withdraw message and announces to LDP neighbours, the announcement sign that this interface IP address of cancellation is corresponding in this locality;
Said address delete cells 704 is used for unit 703 being set after the corresponding announcement sign of this locality this interface IP address of cancellation in said announcement sign, deletes this interface IP address.
The embodiment of the invention also provides a kind of routing device, and this routing device comprises the means for signalling of the above-mentioned interface IP address that the embodiment of the invention provides.
Preferably, the routing device that the embodiment of the invention provides for the LSR of supporting the LDP agreement (Label Switching Router, LSR).
The notifying method of the interface IP address that the embodiment of the invention provides, device and routing device; Send the address when adding message at needs to LDP neighbours; Judge whether to be directed against this interface IP address and sent address interpolation message,, this interface IP address is carried in the address interpolation message announces to LDP neighbours if judgement was directed against this interface IP address when LDP neighbours sent address interpolation message to LDP neighbours; Like this; Use at interface IP address, just a plurality of interfaces all use under the situation of same interface IP address, avoid repeatedly sending address interpolation message to same interface IP address to LDP neighbours and cause address conflict to make the LDP session problem of DOWN occur.
In addition; The notifying method of the interface IP address that the embodiment of the invention provides, device and routing device, need to judge whether this interface IP address is associated with the interface that other are in the UP state at needs when LDP neighbours send address withdraw message; If do not have; Just this interface IP address is carried at and announces in the address withdraw message, like this, can avoid under the situation that interface IP address is used to LDP neighbours; The DOWN state appears in some interfaces in a plurality of interfaces of shared same interface IP address; Perhaps need delete this interface IP address but this interface IP address also related other when being in the interface of UP state, delete this interface IP address in advance, the interface that causes being in the UP state can't re-use this interface IP address and communicate by letter normally.
Obviously, those skilled in the art can carry out various changes and modification to the present invention and not break away from the spirit and scope of the present invention.Like this, belong within the scope of claim of the present invention and equivalent technologies thereof if of the present invention these are revised with modification, then the present invention also is intended to comprise these changes and modification interior.
Claims (12)
1. the notifying method of an interface IP address is characterized in that, comprising:
When tag distribution protocol LDP neighbours send address interpolation message, judge whether the corresponding announcement sign of this interface IP address has been set to effectively at needs; If confirm that then sending the address to this interface IP address to LDP neighbours adds message; If not, confirm that then not sending the address to this interface IP address to LDP neighbours adds message;
Confirming not to be directed against this interface IP address when LDP neighbours sent address interpolation message, this interface IP address is carried in the address interpolation message announces to LDP neighbours.
2. the method for claim 1 is characterized in that, this interface IP address is carried at announces in the address message to LDP neighbours' step, also comprises:
The announcement sign of this interface IP address is set to effectively.
3. according to claim 1 or claim 2 method is characterized in that, need send the address to LDP neighbours and add the situation of message and comprise:
The situation, the local interface that receive the interpolation announcement of local interface address become the situation that the perhaps local LDP session of newly creating of the situation of opening the UP state is in the UP state by closing the DOWN state.
4. method as claimed in claim 3 is characterized in that, the new LDP session of creating is under the UP state status in this locality, saidly judges whether the corresponding announcement sign of this interface IP address has been set to effectively comprise:
Local each interface of traversal to each corresponding interface IP address of each interface, judges respectively whether the announcement sign of this interface IP address has been set to effectively;
Before the step of local each interface of traversal, also comprise:
The announcement sign that the total interface address of the local storage of cancellation is corresponding.
5. according to claim 1 or claim 2 method is characterized in that, also comprises: at needs when LDP neighbours send address withdraw message, judge this interface IP address whether also related other be in the interface of UP state; And when judging this interface IP address related other are not in the interface of UP state, this interface IP address is carried in the address withdraw message announces to LDP neighbours.
6. method as claimed in claim 5 is characterized in that, this interface IP address is carried at announces in the address withdraw message to LDP neighbours, also comprises:
The announcement sign that this interface IP address of cancellation is corresponding in this locality;
Delete this interface IP address.
7. the means for signalling of an interface IP address is characterized in that, comprising:
Judging unit is used at needs when tag distribution protocol LDP neighbours send address interpolation message, judges whether the corresponding announcement sign of this interface IP address has been set to effectively; If confirm that then sending the address to this interface IP address to LDP neighbours adds message; If not, confirm that then not sending the address to this interface IP address to LDP neighbours adds message;
Notification unit is used for confirming not to be directed against this interface IP address when LDP neighbours sent address interpolation message at judging unit, this interface IP address is carried in the address interpolation message announces to LDP neighbours.
8. device as claimed in claim 7 is characterized in that, also comprises:
The announcement sign is provided with the unit, is used in notification unit this interface IP address being carried at address message and announces to LDP neighbours' step, and the announcement of this interface IP address sign is set to effectively.
9. device as claimed in claim 8; It is characterized in that; The new LDP session of creating is in and opens under the UP state status in this locality, and said judging unit is further used for local each interface of traversal; To each corresponding interface IP address of each interface, judge whether the announcement sign of this interface IP address has been set to effectively;
Said announcement sign is provided with the unit, also is used for before local each interface of judging unit traversal the announcement sign that the total interface address of the local storage of cancellation is corresponding.
10. like claim 8 or 9 described devices, it is characterized in that said judging unit also is used at needs when LDP neighbours send address withdraw message, judge whether this interface IP address is gone back related other and be in the interface of UP state;
Said notification unit also is used for when related other of this interface IP address of said judgment unit judges are not in the interface of UP state, this interface IP address is carried in the address withdraw message announces to LDP neighbours.
11. device as claimed in claim 10 is characterized in that, also comprises: the address delete cells;
Said announcement sign is provided with the unit, also is used in said notification unit this interface being carried at address withdraw message and announces to LDP neighbours, the announcement sign that this interface IP address of cancellation is corresponding in this locality;
Said address delete cells is used for the unit being set after the corresponding announcement sign of this locality this interface IP address of cancellation in said announcement sign, deletes this interface IP address.
12. a routing device is characterized in that, this routing device comprises each described device like claim 7-11.
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| CN109218198B (en) * | 2018-10-09 | 2021-03-26 | 迈普通信技术股份有限公司 | Data interaction method, device, MPLS network system and storage medium |
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