CN100428740C - Informing method for attached circuit connection state in packet exchanging network and service device - Google Patents
Informing method for attached circuit connection state in packet exchanging network and service device Download PDFInfo
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- CN100428740C CN100428740C CNB2006100331457A CN200610033145A CN100428740C CN 100428740 C CN100428740 C CN 100428740C CN B2006100331457 A CNB2006100331457 A CN B2006100331457A CN 200610033145 A CN200610033145 A CN 200610033145A CN 100428740 C CN100428740 C CN 100428740C
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Abstract
The present invention relates to an informing method of an attachment circuit connection state in a packet exchange network and a service device. Attachment circuit operation management and a maintenance message are increased. A sub-attachment circuit mark and a sub-attachment circuit state field are carried in the message. When a sub-attachment circuit state of a service device is changed, an opposite terminal can be informed by the attachment circuit operation management and the maintenance message. The service device records the attachment circuit states of the terminal and a far terminal. When the attachment circuit states of the terminal and the far terminal are simultaneously in a normal state, the service forwarding can be carried out according to a pseudo line corresponding to the sub-attachment circuit. When the attachment circuit state of the terminal or the attachment circuit state of the far terminal belongs to an abnormal state, the forwarding can not be carried out. The present invention enhances the availability of PW retransmission, and the waste of the processing resources of a node on the way and the precious network bandwidth resources by the unable final intercommunication service transmission can be avoided.
Description
Technical field
The present invention relates to the packet network technical field, relate in particular to the service equipment in a kind of packet network, and the informing method for attached circuit connection state in the packet network.
Background technology
At present operator is when providing multiple business, employing substantially all be the mode of parallel or " overlapping ": set up and safeguard multiple network, presenting a little at every kind of different different access device of business use.Do like this except making the network planning more the complexity, and be that construction cost or operation cost are all very expensive.So operator when multiple business is provided, builds and operation cost in order to reduce, and wishes to seek a kind of method that multiple business can be provided on public packet network (PSN).
For unified multibusiness network platform is provided, IETF has begun the standardization effort of on packet network " the X over PSN " of any business of transmission, and the pseudo-end to end circuit emulation of its called after (Pseudo-Wire Emulation Edge-to-Edge is abbreviated as PWE3).
The realization of artificial service can be divided into two kinds on packet network: a PW (Pseudo Wire, pseudo-circuit) only carries an emulation service flow (1 TO, 1 mode) and a PW carries multiple emulation service flow (N TO 1 mode).Article one, to carry the benefit of multiple emulation service flow be can more effective use PW head to PW.
Dynamically the foundation of PW is the result that two ends PE (Provider Equipment, service equipment) consults mutually, needs the participation of LDP (label distribution protocol).Two ends PE wants mutual local PW forwarding state.The forwarding state of local PW depends on the state of the outer layer tunnel of the state of LDP session (LDP session) of state that the AC (attached circuit or direct-connected circuit) that need carry out emulation is professional and far-end PE and carrying pseudo-line service.And the state of AC business depends on that the summation of the N strip AC state of this PW correspondence (in the network model of agreement is collectively referred to as the multiple pvcs of binding same PW under N TO 1 mode simultaneously an AC under N TO 1 mode, in order to set forth conveniently, here " the sub-AC " that a PVC among the AC under N TO 1 mode is called this AC): if in many strips AC of PW correspondence, the last item state is that the sub-AC DOWN of UP (being normal operating conditions) falls, and then the state of AC is DOWN (being abnormal operating state); The first strip AC UP among the sub-AC of all of PW correspondence, then the state of AC is UP.
Under the AC of opposite end PE DOWN situation, need to remove the AC forwarding-table item of local end PE, otherwise local terminal AC business information can not finally be forwarded to the destination after arriving opposite end PE, has wasted valuable network bandwidth resources in rain.
The mode of state advertisement has following two kinds: the announcement of the Notification mode of the announcement of Martini mode and expansion.
One, the announcement of Martini mode:
The state of the LDP session of the state of AC and far-end PE and the state of outer layer tunnel be UP simultaneously, and then the forwarding state of local PW sends Mapping (label mapping) message for transmitting; If there is a DOWN to fall among the three, then the forwarding state of local PW is for transmitting, and will send Withdraw (label recovery) message this moment, regains vpn label (be the PW label, its effect is: when transmitting, identify different PW).As: under the situation of PWUP, as long as AC DOWN, then the forwarding state of local PW sends the Withdraw message for transmitting, and removes agreement, as shown in Figure 1.
Two, the announcement of Notification mode:
After sending the mutual vpn label of Mapping, as long as configuration is not deleted, agreement is not just removed, and only sends Notification interacting message both sides' local PW state.As: under the situation of PW UP, as long as AC DOWN, then the forwarding state of local PW is for transmitting, but do not send out the Withdraw message and remove agreement this moment, announce the forwarding state of the local PW of the other side for can not transmit (realizing) and just send the Notification message by the forwarding sign indicating number of announcing local PW, keep vpn label, as shown in Figure 2, comprise the conditional code of local PW in the Notification message.
Prior art is to adopt AC state advertisement mode to judge the connection status of AC, and technical scheme is as follows:
The state that the Mapping message that whether sends mutual vpn label under the Martini mode depends on the state of session of the state of AC and opposite end PE and outer layer tunnel is UP simultaneously.And regain vpn label as long as the state of the state of the session of the state of AC and opposite end PE and outer layer tunnel has a DOWN to fall just to send the Withdraw message.The back needs only and the state UP of the session of opposite end PE and be configured under the Notification mode, and regardless of the state of AC or the state of outer layer tunnel, just sends the Mapping message of mutual vpn label.When the state of AC or the state DOWN of outer layer tunnel fall, just upgrade local PW conditional code, and the opposite end PE of local PW conditional code by Notification message announcement, mainly be as long as configuration is not deleted with the difference of Martini mode, it is not just removed agreement and reclaims vpn label, announce local PW state for can not forwarding state and just send the Notification message, next time is again during UP, do not need the label of reallocating again, just send the Notification message again and announce local PW forwarding state for transmitting.
The limitation of prior art is:
(1) for static configuration PW (foundation of PW does not need the LDP agreement to participate in, and forms by static configuration),, therefore can't announce the state of opposite end AC, also can't learn for the state of PW self simultaneously owing to there is not the participation of LDP agreement.Therefore, when the AC of opposite end PE DOWN or PW self DOWN,, therefore can not remove corresponding AC forwarding-table item of local end PE or PW forwarding-table item, waste valuable network bandwidth resources owing to local terminal can't be known.
(2) for dynamic-configuration PW, the Notification mode has an enormous advantage than Martini mode and is, it can reduce the mutual of message packet between the PE.But their a common deficiency point is: can't announce the professional right information of concrete AC.
As shown in Figure 3, subAC1-subAC3 and subAC2-subAC4 are respectively two Business Streams, adopt the multiplexing pseudo-line PW1 of mode of N TO 1; SubAC1 inserts the different port of PE1 respectively with subAC2, and both combinations of states form the AC state at PE1 place.SubAC3 inserts the different port of PE2 respectively with subAC4, and combinations of states forms the AC state at PE2 place.At the PE1 place, during with the state UP of the state UP of the LDP session of far-end PE and outer layer tunnel, if the subAC1 state becomes UP by DOWN, then the AC state at PE1 place is with regard to UP, this moment, but local PW forwarding state was a forwarding state, perhaps send the Mapping message, perhaps send the Notification message and announce local PW state UP.At the PE2 place, with the state of the state of the session of opposite end PE and outer layer tunnel all during UP, if the subAC4 state becomes UP by DOWN, then the AC state at PE2 place is with regard to UP, but the local PW forwarding state of PE2 this moment also is a forwarding state, because the PW forwarding state of local and far-end all is to transmit, the state of this PW is UP, issues the logical forwarding list item.But actual conditions are subAC1 and subAC3, and to be only a business right, so after the business information of subAC1 arrived PE2 by PW1, because subAC3 state DOWN, the service message of subAC1 still can be abandoned by PE2.This shows, under this situation, be Martini mode or Notification mode all can't announce AC correct business to information, the business information of subAC1 can not finally be forwarded to the destination after arriving PE2 by PW1, has also wasted valuable network bandwidth resources.
OAM (Operations, Administration and Maintenance) function is very important in public network, and it can be simplified network operation, monitoring network performance, reduce the network operation cost.In the network that provides quality of service (QOS) to guarantee, OAM(Operation Administration Maintenance) is even more important.MPLS (exchange of multi-protocols sign) supports QOS and various network services as the key technology of prolongable next generation network, requires Operations, Administration and Maintenance (OAM) function equally.All MPLS OAM messages of ITU-T-Y.1711 regulation all use a reservation label value 14 that the whole world is known, are called " OAM Alert Label ", to be different from common MPLS customer flow message.
OAM defects detection function is based on the periodicity transmission from the source end (ingress) of LSP (label switched path) to Su Duan (egress) of CV (connective confirm) message or FFD (failure detection fast) message.The OAM message is encapsulated as MPLS (Multiple protocol label switching at the source end, multiprotocol label switching) message, the outer layer label that is message is the outgoing label of LSP (label switched path) at this node, the vpn label value is 14 (OAM Route alert label), and all the other are OAM protocol massages payload.When Su Duan detects defective, can send BDI (oppositely defects detection) message to the place end, can know the state of current LSP like this at the sourcesink node of LSP by backward channel.
OAM message payload is made of OAM(Operation Administration Maintenance) type, specific function type data and 1 common BIP16 error detection mechanism.For accelerating to handle and support the minimum message length of existing two layers of technology (as Ethernet), the minimum load length of all OAM messages is necessary for 44 byte longs.
Y.1711 the two kinds of messages that have that are used for connectivity verification in the MPLS OAM mechanism of Ti Chuing, i.e. CV and FFD message.Wherein, in the CV message one second one, 50 milliseconds of (also can be configured to 10 milliseconds, 20 milliseconds, 100 milliseconds, 200 milliseconds and 500 milliseconds) of FFD message acquiescence.MPLS OAM defects detection function is based on CV message or the FFD message periodicity from the source end (ingress) of LSP to Su Duan (egress) and sends.
But in the prior art, the OAM message can't carry out PW and AC status detection.
Summary of the invention
Technical problem to be solved by this invention is: overcome prior art under the N of artificial service on packet network TO 1 mode, can't accurately know the deficiency of artificial service to information, service equipment in a kind of packet network is provided, and the informing method for attached circuit connection state in the packet network, improve the validity that PW transmits, avoid the business transmission of finally intercommunication to waste the processing resource and the valuable network bandwidth resources of node on the way.
The present invention solves the problems of the technologies described above the technical scheme that is adopted to be:
Informing method for attached circuit connection state in this packet network may further comprise the steps:
Increase attached circuit Operations,Administration And Maintenance message, carry sub-attached circuit sign, sub-attachment circuit state field in the described message;
When service equipment sub-attachment circuit state changes, by described attached circuit Operations,Administration And Maintenance message notifying opposite end.
Wherein, service equipment minute book terminal attachment circuit state and the sub-attachment circuit state of far-end, when service equipment sub-attachment circuit state changes, upgrade the sub-attachment circuit state of local terminal record, and by described attached circuit Operations,Administration And Maintenance message notifying opposite end; When this terminal attachment circuit state and the sub-attachment circuit state of far-end are normal condition simultaneously, carry out business according to the pseudo-circuit of this sub-attached circuit correspondence and transmit; When this terminal attachment circuit state or the sub-attachment circuit state of far-end belong to abnormal condition, do not transmit.
Wherein, in service equipment, set up the corresponding relation of sub-attached circuit, pseudo-circuit, sub-attached circuit validity, when business is transmitted, the validity of inquiring about corresponding sub-attached circuit according to described sub-attached circuit, when sub-attached circuit is effective, transmit according to pairing pseudo-circuit; Otherwise do not transmit.
Wherein, sub-attached circuit hardware forwarding table can be set in service equipment, set up the corresponding relation of sub-attached circuit, pseudo-circuit, sub-attached circuit validity in described sub-attached circuit hardware forwarding table by sub-attached circuit sign, pseudo-line identification, sub-attached circuit validity sign list item are set.
Wherein, described sub-attached circuit is designated identifier of the virtual route/virtual channel identifier, or VLAN ID; Perhaps, described sub-attached circuit is designated the professional right general identifications of expression, and this general identifications and identifier of the virtual route/virtual channel identifier are set on described service equipment, or the mapping relations of VLAN ID.
Wherein, described sub-attached circuit validity judges that according to this terminal attachment circuit state and the sub-attachment circuit state of far-end when the two-terminal attachment circuit state was normal condition simultaneously, sub-attached circuit was effective; If when this terminal attachment circuit state or the sub-attachment circuit state of far-end belonged to abnormal condition, sub-attached circuit was invalid.
Wherein, sub-attachment circuit state table is set in service equipment, by the validity that this terminal attachment circuit state and the sub-attachment circuit state list item of far-end reflect described sub-attached circuit is set in described sub-attachment circuit state table; When this terminal attachment circuit state changes, revise described terminal attachment circuit state; When receiving described attached circuit Operations,Administration And Maintenance message,, change the sub-attachment circuit state of described far-end according to the sub-attachment circuit state in the message.
Service equipment in corresponding a kind of packet network comprises attached circuit module, transmission/receiver module, and the Operations,Administration And Maintenance module that is connected with described attached circuit module, transmission/receiver module is set in service equipment; When sub-attachment circuit state changes, described attached circuit module is notified described Operations,Administration And Maintenance module, and the Operations,Administration And Maintenance module sends the Operations,Administration And Maintenance message notifying opposite end of carrying sub-attached circuit sign, sub-attachment circuit state field by described transmission/receiver module.
Wherein, described service equipment also comprises the sub-attached circuit hardware forwarding table module that is connected with described Operations,Administration And Maintenance module, set up the corresponding relation of sub-attached circuit validity and pseudo-circuit in the described sub-attached circuit hardware forwarding table module, described sub-attached circuit validity is effective when the two-terminal attachment circuit state is normal condition simultaneously; It is invalid when this terminal attachment circuit state or the sub-attachment circuit state of far-end belong to abnormal condition; When business was transmitted, described Operations,Administration And Maintenance module was inquired about the validity of corresponding sub-attached circuit in the described sub-attached circuit hardware forwarding table module, when sub-attached circuit is effective, is transmitted according to pairing pseudo-circuit by described transmission/receiver module.
Wherein, described service equipment also comprises the sub-attachment circuit state table module that is connected with described Operations,Administration And Maintenance module, described sub-attachment circuit state table module records this terminal attachment circuit state and the sub-attachment circuit state of far-end reflect the validity of described sub-attached circuit.
Beneficial effect of the present invention is: the invention provides the service equipment in a kind of packet network, and the informing method for attached circuit connection state in the packet network, the agreement that relates generally to N TO 1 mode of artificial service on the packet network realizes, by the OAM type of expansion ITU-T-Y.1711 definition, realize AC state advertisement function.When the PW binding mode is ATM N to1 mode,, just, carry the VPI/VCI (also can be VLAN ID etc.) that can identify sub-AC in the message by OAM message notifying opposite end in case sub-AC state changes.Handle like this, the PW state UP that the right AC UP that can solve the non-business of prior art causes, but situation can not really E-Packet, even cause the AC information of an end to arrive the PE of the other end by the pseudo-line of PW, can not be continued to transmit, but abandoned by this PE, waste the processing resource of node on the way and the defective of valuable network bandwidth resources.
The present invention can know accurately that by the AC-OAM message artificial service is to information, the PW UP that refusal causes owing to the right sub-AC UP that do not belong to same artificial service, make PW state and real forwarding state strict conformance, improved the validity that PW transmits, avoid the finally business transmission of intercommunication to waste the processing resource and the valuable network bandwidth resources of node on the way, and solved the problem that static PW can't announce the AC state.
Description of drawings
Fig. 1 carries out the principle schematic of state advertisement for adopting the Martini mode;
The principle schematic of Fig. 2 for adopting the Notification mode to announce;
Fig. 3 is the annexation schematic diagram that a PW carries multiple emulation service flow;
Fig. 4 is an AC state advertisement principle schematic of the present invention;
Fig. 5 is an AC state advertisement process of transmitting process chart of the present invention;
Fig. 6 is an AC state advertisement receiving course process chart of the present invention.
Embodiment
With embodiment the present invention is described in further detail with reference to the accompanying drawings below:
The invention provides the informing method for attached circuit connection state in a kind of packet network, comprise following content:
One, AC-OAM message
The present invention expands the OAM type of ITU-T-Y.1711 definition, and newly-increased AC-OAM (attached circuit Operations,Administration And Maintenance) message is used for when local terminal AC state changes, the announcement opposite end.In the AC-OAM message that sends, need to carry VPI (identifier of the virtual route)/VCI (virtual channel identifier) field, be used to identify sub-AC, state with a sub-AC of byte representation is the state of a PVC, the function type of AC-OAM message (Function Type) is 0x09, and it is 0x00 that other field keeps (Reserved).Form is as follows:
AC-OAM is not the connectivity that detects sub-AC, just when the state of this terminal AC changes, by OAM message announcement opposite end.
Two, AC hardware forwarding table
In order to control the validity that emulated data is transmitted on PW, in PE device hardware table, need newly-increased AC-PW binding relationship, be used for the PW of emulated data to transmit validity.This table leaves in the hardware, is used for control and transmits, and the present invention claims that this table is the AC hardware forwarding table.In the AC hardware forwarding table, use VPI/VCI and PW Label to represent the binding relationship of AC-PW, and define an AC effective marker position---AC_Avail_Flag, AC hardware forwarding table form is as follows:
| VPI/VCI | ?PW?Label | …… | ?AC_Avail_Flag |
| …… |
| …… |
When carrying out the business forwarding, look into this table by VPI/VCI earlier, if AC_Avail_Flag equals 1, then PW is effective, looks into the PW hardware forwarding table according to PW Label, normally sends message; If AC_Avail_Flag equals 0, expression AC breaks down dropping packets.
Three, AC state table
In every PE equipment, in host software, newly-increased AC state table.This table mainly comprises two territories: local terminal AC state and far-end AC state, represent the AC state of local terminal and far-end respectively.AC state table form is as follows:
| VPI/VCI | Local terminal AC state | Far-end AC state |
Local terminal AC state is by the influence of local terminal AC module, and when local terminal AC state changed, AC module notice host software changed the local terminal AC state in the AC state table.Far-end AC state after receiving the AC-OAM message, according to the sub-AC state in the message, changes the far-end AC state in the AC state table by the influence of AC-OAM message.
The AC state table influences the AC hardware forwarding table, if local terminal AC state and far-end AC state are UP simultaneously, host software puts 1 with the AC_Avail_Flag in the AC hardware forwarding table, makes the PW of sub-AC correspondence effective.If local terminal AC state or far-end AC state are DOWN, host software puts 0 with the AC_Avail_Flag in the AC hardware forwarding table, makes the PW of sub-AC correspondence invalid, can not transmit.
Four, AC state advertisement process
1, AC state advertisement principle
One time AC state advertisement process can be divided into process of transmitting and receiving course.When the AC of PE1 state changed, PE1 revised the relevant entries of local terminal earlier, sent AC-OAM message announcement AC state to PE2 again; After PE2 received the AC-OAM message, analytic message was revised corresponding list item according to message content.
Be illustrated in figure 4 as AC state advertisement principle schematic of the present invention, AC-OAM state advertisement principle is as follows: need set up PW between PE1 and the PE2, the PW state is UP, and both sides' host software generates PW hardware forwarding table item, and is issued to hardware; On PE1 and PE2, dispose the AC-OAM announcement respectively, make PE1 and PE2 all have the ability of handling AC-OAM.
(1) when the AC state changes, AC module notice host software;
(2) PE1 host software OAM module is upgraded AC state table (local terminal AC state);
(3) PE1 hardware OAM module is upgraded the AC_Avail_Flag flag bit of AC hardware forwarding table;
(4) PE1 hardware inquiry PW hardware forwarding table, assembling AC-OAM message;
(5) send the AC-OAM message;
(6) PE2 receives message, inquiry PW hardware forwarding table, and analytic message is handed over hardware OAM resume module;
(7) PE2 hardware OAM module analysis message obtains the message parameter, hands over host software OAM resume module;
(8) PE2 host software OAM module according to the sub-AC state in the message, is upgraded AC state table (far-end AC state);
(9) PE2 host software OAM module command hardware OAM module, the AC_Avail_Flag flag bit of renewal AC hardware forwarding table.
Like this, pass through notifying mechanism, PE just can clearly know the state of this terminal of Business Stream centering AC and to the state of terminal AC, thereby can know accurately that artificial service is to information, the PW UP that refusal causes owing to the right sub-AC UP that do not belong to same artificial service, make PW state and real forwarding state strict conformance, avoided the finally business transmission of intercommunication to waste the processing resource and the valuable network bandwidth resources of node on the way.
2, process of transmitting
As shown in Figure 5, the process of transmitting handling process is as follows:
(1) change (Up-＞Down or Down-＞Up) of sub-AC state;
(2) AC module notice host software: sub-AC state changes;
(3) host software judges that sub-AC state is by UP-＞Down, or Down-＞UP;
(4) be by UP-＞Down as fruit AC state, then the local terminal AC state of AC state table changed into Down; The AC_Avail_Flag of AC hardware forwarding table is put 0, and send AC-OAM Down message;
(5) be by Down-＞UP as fruit AC state, then the local terminal AC state of AC state table changed into Up; The AC_Avail_Flag of AC hardware forwarding table is put 1, send AC-OAM Up message.
3, receiving course
As shown in Figure 6, the receiving course handling process is as follows:
(1) PE receives the AC-OAM message;
(2) analytic message obtains VPI/VCI and sub-AC state;
(3) judge whether to exist the sub-AC of coupling, if not then finish; If exist, then carry out
(4) step;
(4) judge that sub-AC state is Up or Down;
I is if Down then changes into Down with the far-end AC state of AC state table, and the AC_Avail_Flag of AC hardware forwarding table is put 0;
Ii, be Up, then the far-end AC state of AC state table changed into Up, and judge whether this terminal AC state of AC state table is Up,, otherwise finish if then the AC_Avail_Flag with the AC hardware forwarding table puts 1 as fruit AC state.
Five, the versatility of AC state advertisement
AC-OAM announcement AC status mechanism is not limited only to N to 1 mode of ATM PWE3, for PWE3 business such as Eth/TDM/FR, is suitable for too.In ATM PWE3, use VPI/VCI can identify one specific professional right, similar, can use the sign of Vlan ID (VLAN ID) among the Eth PWE3 as a pair of specific transactions.So, the VPI/VCI in AC-OAM message and the AC hardware forwarding table is replaced to the identifier of corresponding service, as the Vlan ID among the Eth, just can on corresponding PW business simulating link, use AC state advertisement based on the OAM message.
More unified method is, uses general sub-AC identifier to identify that any one is specific professional right.Promptly use AC-ID to represent the VPI/VCI among the ATM, the VlanID among the Eth etc., and set up an AC-ID and the mapping relations of specific transactions identifying.Like this, AC hardware forwarding table form is as follows:
| AC-ID | ?PWLabel | …… | ?AC_Avail_Flag |
| …… | |||
| …… |
The capital can be only with safeguarding an AC hardware forwarding table like this, and the relation of AC and PW is simpler and clearer; The business configuration order of AC and PW binding is simple, half before configuration amount has only; Hardware is realized simple relatively, determines the information of concrete PVC by the index of linear search AC-ID correspondence, thereby improves forwarding speed.
As shown in Figure 4, the present invention provides the service equipment in a kind of packet network simultaneously, comprise attached circuit module, transmission/receiver module, Operations,Administration And Maintenance (OAM) module that is connected with described attached circuit module, transmission/receiver module is set in service equipment; When sub-attachment circuit state changes, attached circuit module notifying operation administers and maintains module, and the Operations,Administration And Maintenance module sends the Operations,Administration And Maintenance message notifying opposite end of carrying sub-attached circuit sign, sub-attachment circuit state field by transmission/receiver module.
Service equipment also comprises the sub-attached circuit hardware forwarding table module that is connected with the Operations,Administration And Maintenance module, set up the corresponding relation of sub-attached circuit validity and pseudo-circuit in the sub-attached circuit hardware forwarding table module, sub-attached circuit validity is effective when the two-terminal attachment circuit state is normal condition simultaneously; It is invalid when this terminal attachment circuit state or the sub-attachment circuit state of far-end belong to abnormal condition; When business is transmitted, the Operations,Administration And Maintenance module is inquired about the validity of corresponding sub-attached circuit in the described sub-attached circuit hardware forwarding table module, when sub-attached circuit is effective, transmitted according to pairing pseudo-circuit by transmission/receiver module, inquiry PW hardware forwarding table is transmitted when transmitting.
Service equipment also comprises the sub-attachment circuit state table module that is connected with the Operations,Administration And Maintenance module, and sub-attachment circuit state table module records this terminal attachment circuit state and the sub-attachment circuit state of far-end are reacted the validity of sub-attached circuit.
Those skilled in the art do not break away from essence of the present invention and spirit, can there be the various deformation scheme to realize the present invention, the above only is the preferable feasible embodiment of the present invention, be not so limit to interest field of the present invention, the equivalence that all utilizations specification of the present invention and accompanying drawing content are done changes, and all is contained within the interest field of the present invention.
Claims (10)
1, informing method for attached circuit connection state in a kind of packet network is characterized in that, may further comprise the steps:
Increase attached circuit Operations,Administration And Maintenance message, carry sub-attached circuit sign, sub-attachment circuit state field in the described message;
When service equipment sub-attachment circuit state changes, by described attached circuit Operations,Administration And Maintenance message notifying opposite end.
2, informing method for attached circuit connection state in the packet network according to claim 1, it is characterized in that: service equipment minute book terminal attachment circuit state and the sub-attachment circuit state of far-end, when service equipment sub-attachment circuit state changes, upgrade the sub-attachment circuit state of local terminal record, and by described attached circuit Operations,Administration And Maintenance message notifying opposite end; When this terminal attachment circuit state and the sub-attachment circuit state of far-end are normal condition simultaneously, carry out business according to the pseudo-circuit of this sub-attached circuit correspondence and transmit; When this terminal attachment circuit state or the sub-attachment circuit state of far-end belong to abnormal condition, do not transmit.
3, informing method for attached circuit connection state in the packet network according to claim 2, it is characterized in that: the corresponding relation of in service equipment, setting up sub-attached circuit, pseudo-circuit, sub-attached circuit validity, when business is transmitted, the validity of inquiring about corresponding sub-attached circuit according to described sub-attached circuit, when sub-attached circuit is effective, transmit according to pairing pseudo-circuit; Otherwise do not transmit.
4, informing method for attached circuit connection state in the packet network according to claim 3, it is characterized in that: sub-attached circuit hardware forwarding table is set in service equipment, sets up the corresponding relation of sub-attached circuit, pseudo-circuit, sub-attached circuit validity in described sub-attached circuit hardware forwarding table by sub-attached circuit sign, pseudo-line identification, sub-attached circuit validity sign list item are set.
5, informing method for attached circuit connection state in the packet network according to claim 4 is characterized in that: described sub-attached circuit is designated identifier of the virtual route/virtual channel identifier, or VLAN ID; Perhaps, described sub-attached circuit is designated the professional right general identifications of expression, and this general identifications and identifier of the virtual route/virtual channel identifier are set on described service equipment, or the mapping relations of VLAN ID.
6, informing method for attached circuit connection state in the packet network according to claim 3, it is characterized in that: described sub-attached circuit validity is judged according to this terminal attachment circuit state and the sub-attachment circuit state of far-end, when the two-terminal attachment circuit state was normal condition simultaneously, sub-attached circuit was effective; If when this terminal attachment circuit state or the sub-attachment circuit state of far-end belonged to abnormal condition, sub-attached circuit was invalid.
7, informing method for attached circuit connection state in the packet network according to claim 6, it is characterized in that: sub-attachment circuit state table is set, in service equipment in described sub-attachment circuit state table by the validity that this terminal attachment circuit state and the sub-attachment circuit state list item of far-end reflect described sub-attached circuit is set; When this terminal attachment circuit state changes, revise described terminal attachment circuit state; When receiving described attached circuit Operations,Administration And Maintenance message,, change the sub-attachment circuit state of described far-end according to the sub-attachment circuit state in the message.
8, the service equipment in a kind of packet network comprises attached circuit module, transmission/receiver module, it is characterized in that: the Operations,Administration And Maintenance module that is connected with described attached circuit module, transmission/receiver module is set in service equipment; When sub-attachment circuit state changes, described attached circuit module is notified described Operations,Administration And Maintenance module, and the Operations,Administration And Maintenance module sends the Operations,Administration And Maintenance message notifying opposite end of carrying sub-attached circuit sign, sub-attachment circuit state field by described transmission/receiver module.
9, the service equipment in the packet network according to claim 8, it is characterized in that: described service equipment also comprises the sub-attached circuit hardware forwarding table module that is connected with described Operations,Administration And Maintenance module, set up the corresponding relation of sub-attached circuit validity and pseudo-circuit in the described sub-attached circuit hardware forwarding table module, described sub-attached circuit validity is effective when the two-terminal attachment circuit state is normal condition simultaneously; It is invalid when this terminal attachment circuit state or the sub-attachment circuit state of far-end belong to abnormal condition;
When business was transmitted, described Operations,Administration And Maintenance module was inquired about the validity of corresponding sub-attached circuit in the described sub-attached circuit hardware forwarding table module, when sub-attached circuit is effective, is transmitted according to pairing pseudo-circuit by described transmission/receiver module.
10, the service equipment in the packet network according to claim 9, it is characterized in that: described service equipment also comprises the sub-attachment circuit state table module that is connected with described Operations,Administration And Maintenance module, described sub-attachment circuit state table module records this terminal attachment circuit state and the sub-attachment circuit state of far-end reflect the validity of described sub-attached circuit.
Priority Applications (6)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100331457A CN100428740C (en) | 2006-01-17 | 2006-01-17 | Informing method for attached circuit connection state in packet exchanging network and service device |
| EP06791219A EP1978681B1 (en) | 2006-01-17 | 2006-10-09 | Methods and devices for judging pw connection state and notifying ac connection state |
| DE602006013047T DE602006013047D1 (en) | 2006-01-17 | 2006-10-09 | METHOD AND DEVICE FOR ASSESSING THE PW CONNECTION CONDITION AND FOR INDICATING THE AC CONNECTION CONDITION |
| AT06791219T ATE461572T1 (en) | 2006-01-17 | 2006-10-09 | METHOD AND DEVICES FOR ASSESSING THE PW CONNECTION STATE AND FOR COMMUNICATING THE AC CONNECTION STATUS |
| PCT/CN2006/002637 WO2007082429A1 (en) | 2006-01-17 | 2006-10-09 | Methods and devices for judging pw connection state and notifying ac connection state |
| US12/174,503 US20080273467A1 (en) | 2006-01-17 | 2008-07-16 | Methods for determining pw connection state and for notifying ac connection state and the associated equipments |
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| CNB2006100331457A CN100428740C (en) | 2006-01-17 | 2006-01-17 | Informing method for attached circuit connection state in packet exchanging network and service device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN100471162C (en) | 2007-04-28 | 2009-03-18 | 杭州华三通信技术有限公司 | Method for releasing and processing virtual circuit information and supplier edge device |
| CN103095526B (en) * | 2013-01-06 | 2015-09-23 | 盛科网络（苏州）有限公司 | Based on the OAM reporting events method and system of scanning |
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