CN100450089C - Method for transmitting message - Google Patents
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- CN100450089C CN100450089C CNB2005101049590A CN200510104959A CN100450089C CN 100450089 C CN100450089 C CN 100450089C CN B2005101049590 A CNB2005101049590 A CN B2005101049590A CN 200510104959 A CN200510104959 A CN 200510104959A CN 100450089 C CN100450089 C CN 100450089C
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Abstract
The present invention discloses a method for forwarding messages. In the method, each VLAN domain and corresponding ID are set in advance, CM in a network is allocated to each VLAN domain, and each VLAN domain is matched with ascending output interfaces of the network side. The method further comprises the steps that after CMTS receives messages of the user side, whether the CM in the messages of the user side belongs to the preset VLAN domain is judged, if the CM in the messages of the user side does not belong to the preset VLAN domain, the messages of the user side are forwarded according to the normal flow, and the processing flow is ended; or else, the step b is executed; the CMTS determines the output interface used for forwarding the messages of the user side, the head of the messages is added with the ID of the VLAN to which the CM of the messages of the user side belongs, and then the messages are forwarded through the output interface. The present invention also discloses another method for forwarding the messages. The method not only achieves ascending and descending forwarding of the messages but also achieves the allocation of different VLAN domains based on the CM, namely the intelligent configuration of the ID of VLAN to which the CM corresponds.
Description
Technical field
The present invention relates to the network transmission technology field, relate to a kind of method that realizes that message is transmitted or rather.
Background technology
At present, coaxial optical fiber hybrid network (HFC) network access technique is present popular a kind of access way, and it mainly is to provide the consumer wideband access service by data, services interface specification (DOCSIS)/European DOCSIS standard (EuroDOCSIS) agreement of moving based on cable on hfc plant.
When realizing inserting, specifically also need provide access way at the Cable Modem Terminal System between hfc plant and the IP network (CMTS) by hfc plant.The access way of CMTS mainly contains three kinds: based on peer-peer protocol (PPPoE) mode, DHCP (DHCP) mode and two layers of transparent transmission mode of Ethernet.
Wherein, PPP over Ethernet and DHCP mode all will insert on CMTS and terminate, and carry out simple Certificate Authority by CMTS, and the upper layer device of CMTS is only as router.For this mode, because CMTS itself is used for hfc plant to the bridge joint of IP network, so its authentification of user authentication management characteristic generally can be very not powerful, and this mode can only be managed its subordinate's user by CMTS.Therefore, the shortcoming of this access way is: the aaa functionality of system is powerful inadequately, and the management dispersion, can't carry out unified access user management on B-RAS.
Two layers of transparent transmission mode then be with CMTS as two layers of bridging device, the address assignment of user PC and Certificate Authority work are finished by the B-RAS on CMTS upper strata, therefore can carry out fairly perfect user management work on B-RAS.Networking under this mode is used as shown in Figure 1.
For the access way of this two layers of transparent transmission, the direct transparent transmission of all user's messages is perhaps stamped unified VLAN ID, perhaps automatically for each CM distributes a VLAN ID, and carries out authentication by the B-RAS on upper strata.Though this mode has solved the shortcoming that aaa functionality is not strong under PPP over Ethernet and the DHCP mode, user management disperses, but has the defective that can not intelligently CM be configured to LAN, implements underaction.
Summary of the invention
In view of this, subject matter to be solved by this invention is to provide a kind of method that realizes that message is transmitted, so that can distribute vlan domain according to CM.
For addressing the above problem, the invention provides following technical scheme:
A kind of method that realizes that message is transmitted sets in advance each vlan domain and corresponding ID, the CM in the network is assigned in each vlan domain, and disposes the up outgoing interface of each vlan domain at network side, and this method further may further comprise the steps:
A.CMTS judges whether the CM that sends this message belongs to described default vlan domain after receiving the user side message, if not, then transmit, and finish this handling process according to normal forwarding process, otherwise, execution in step b;
B.CMTS is identified for transmitting the outgoing interface of this message, judge whether determined outgoing interface is the up outgoing interface of network side, if then in the heading of message, add the ID of vlan domain under the CM that sends this message afterwards this message to be transmitted to B-RAS by this outgoing interface; Otherwise, directly this message is forwarded by this outgoing interface.
Describedly CM in the network is assigned to each vlan domain is: preserve the identification information of the CM that is distributed and the corresponding relation of VLAN ID; Perhaps preserve data feedback channel between CM and the CMTS and the corresponding relation of VLAN ID.
The identification information of described preservation CM and the corresponding relation of VLAN ID are: preserve the MAC Address of CM and the corresponding relation of VLAN ID; Judge among the described step a whether CM belongs to vlan domain and be: judge the pairing VLAN ID of the MAC Address that whether has this CM in the described corresponding relation;
The identification information of described preservation CM is with the corresponding relation of VLAN ID or be: preserve the MAC Address of CM and the corresponding relation of VLAN ID, and after CM is reaching the standard grade, obtain the pairing VLAN ID of this CM, the corresponding relation of preservation CM ID and VLAN ID; Judge among the described step a whether CM belongs to vlan domain and be: judge in the corresponding relation of described CM ID and VLAN ID whether have the pairing VLAN ID of this CM ID.
Among the described step b, the outgoing interface that CMTS is identified for transmitting this message is: after CMTS determines that this message is unicast message, obtain outgoing interface corresponding with this message in the two-layer retransmitting table.
This method further comprises: CMTS preserves the attribute of each online CM when CM reaches the standard grade, and described attribute comprises the outgoing interface of the affiliated coaxial optical fiber hybrid network HFC side of CM at least;
Among the step b, before the outgoing interface of described CMTS in obtaining two-layer retransmitting table, further comprise: the destination address according to this message is searched two-layer retransmitting table, if there is corresponding two-layer retransmitting table, then carry out the step of obtaining corresponding outgoing interface in this two-layer retransmitting table, otherwise, determine the up outgoing interface of network side of the affiliated vlan domain of this CM, and determine in this vlan domain the outgoing interface of HFC side under the online CM, with the outgoing interface of HFC side under up outgoing interface of described network side and the described online CM as the outgoing interface that is used to E-Packet.
This method further comprises: CMTS preserves the attribute of each online CM when CM reaches the standard grade, and described attribute comprises the outgoing interface of the affiliated HFC side of CM at least;
Among the step b, the outgoing interface that described CMTS is identified for transmitting this message is: after the type of determining this message is multicast or broadcasting packet, determine the up outgoing interface of network side of the affiliated vlan domain of this CM, and determine in this vlan domain the outgoing interface of HFC side under the online CM, with the outgoing interface of HFC side under up outgoing interface of described network side and the described online CM as the outgoing interface that is used to E-Packet.
Among the described step b, described CMTS is after definite this message is multicast message, and before this message is forwarded by this outgoing interface, further comprise: judge self whether to support the IGMP protocol massages to intercept IGMP SNOOP, if then this multicast message is transmitted by IGMP SNOOP flow process; Otherwise, execution is transmitted this message by this outgoing interface step.
The another kind of method that realizes that message is transmitted of the present invention sets in advance each vlan domain and corresponding ID, the CM in the network is assigned in each vlan domain, and disposes the up outgoing interface of each vlan domain at network side, and this method further may further comprise the steps:
A.CMTS judges in the heading of this message whether carried VLAN ID after receiving the network side message, if not, then transmit, and finish this handling process according to normal forwarding process, otherwise, execution in step B;
B.CMTS is identified for transmitting the outgoing interface of this message, increases this VLAN ID in the control domain of this message, afterwards this message is forwarded by this outgoing interface.
Describedly CM in the network is assigned to each vlan domain is: preserve the identification information of the CM that is distributed and the corresponding relation of VLAN ID, perhaps preserve CM to the data feedback channel of CMTS and the corresponding relation of VLANID.
Among the described step B, the described outgoing interface that is identified for transmitting this message is: after CMTS determines that this message is unicast message, obtain outgoing interface corresponding with this message in the two-layer retransmitting table.
This method further comprises: CMTS preserves the attribute of each online CM when CM reaches the standard grade, and described attribute comprises the outgoing interface of the affiliated HFC side of CM at least;
Among the step B, before the outgoing interface of described CMTS in obtaining two-layer retransmitting table, further comprise: the destination address according to this message is searched two-layer retransmitting table, if there is corresponding two-layer retransmitting table, then carry out the step of obtaining corresponding outgoing interface in this two-layer retransmitting table, otherwise, determine the up outgoing interface of network side of the affiliated vlan domain of CM of this message of transmission, and determine in this vlan domain the outgoing interface of HFC side under the online CM, with the outgoing interface of HFC side under up outgoing interface of described network side and the described online CM as the outgoing interface that is used to E-Packet.
This method further comprises: CMTS preserves the attribute of each online CM when CM reaches the standard grade, and described attribute comprises the outgoing interface of the affiliated HFC side of CM at least;
Among the step B, the outgoing interface that described CMTS is identified for transmitting this message is: after determining that this message is multicast or broadcasting packet, determine the up outgoing interface of network side of the affiliated vlan domain of CM of this message of transmission, and determine in this vlan domain the outgoing interface of HFC side under the online CM, with the outgoing interface of HFC side under the up outgoing interface of network side of vlan domain under the CM of described this message of transmission and the described online CM as the outgoing interface that is used to E-Packet.
Among the described step B, described CMTS and before this message is forwarded by this outgoing interface, further comprises after definite this message is multicast message: judge whether self supports IGMP SNOOP, if then this multicast message is transmitted by IGMP SNOOP flow process; Otherwise, execution is transmitted this message by this outgoing interface step.
Further comprise before the described step B: CMTS judges that whether the pairing vlan domain of VLAN ID in this heading exists, and if there is no, then abandons this message; Otherwise, execution in step B.
Among the described step B, before message is forwarded, further comprise: remove the VLAN ID in the heading of this message.
The present invention program is by setting in advance each vlan domain and corresponding ID, CM in the network is assigned in each vlan domain, and dispose the up outgoing interface of each vlan domain at network side, CMTS is after the user side message of determining to receive belongs to default vlan domain afterwards, be identified for transmitting the outgoing interface of this message, and in the heading of message, add the ID of this vlan domain, afterwards this message is sent by this outgoing interface, make when having realized the message forwarded upstream, also realized distributing different vlan domains, promptly realized the pairing VLAN ID of intelligent configuration CM based on CM.
Similarly, the present invention program is by setting in advance each vlan domain and corresponding ID, and the CM in the network is assigned in each vlan domain, after CMTS has carried VLAN ID in the network side message of determining to receive afterwards, be identified for transmitting the outgoing interface of this message, in the control domain of this message, increase this VLAN ID, should Austria committee forward afterwards by this outgoing interface, make when having realized that message downlink is transmitted, also realized distributing different vlan domains, promptly realized the pairing VLAN ID of intelligent configuration CM based on CM.
Based on the present invention program, CMTS can regard as and has bridging functionality and based on the Layer 2 switch of CM, be that several CM and one or more backup upstream Interface are formed a broadcast domain, in this broadcast domain, carry out message and transmit, thereby cooperate realization can run manageable access scheme with B-RAS.
In the VPN network, the present invention program by with vlan domain as VPN, two layers of CE equipment that make CMTS can be used as based on CM use, and cooperate the VPN that realizes two layers or three layers easily with PE equipment, accomplish to broadcast belonging between the different CM of same VPN, do not rely on PE.
And the CMTS with the described function of the present invention program can also be by many interconnected modes, realize simple two layers of local area network (LAN) or based on the VPN network of VLAN.
The present invention program can also be with vlan domain as the SERVICE territory, thereby CM can be assigned in other the colony.
Description of drawings
Fig. 1 is the prior art system structure chart;
Fig. 2 is the realization flow figure of forwarded upstream message among the present invention program;
Fig. 3 is the descending realization flow figure that E-Packets among the present invention program;
Fig. 4 is the entire flow figure of forwarded upstream message in the embodiment of the invention;
Fig. 5 is the descending entire flow figure that E-Packets in the embodiment of the invention.
Embodiment
The present invention program mainly is based on CM and disposes different vlan domains, and the ID of vlan domain under the corresponding C M is set in message, makes CMTS can have more powerful access function.Like this, CMTS can carry out unified authentication to user's message by B-RAS after various user's messages are sent to B-RAS, also promptly can realize fairly perfect user management work by B-RAS.
Specifically, the present invention program at first needs to be provided with each vlan domain and corresponding ID, then the CM in the network is assigned in each vlan domain.Wherein, the CM in the network being assigned to each vlan domain can be to realize by the identification information of preservation CM and the corresponding relation of VLAN ID.And preserving corresponding relation specifically can be to preserve the MAC Address of CM and the corresponding relation of VLAN ID; Also can preserve the corresponding relation of CM ID and VLAN ID, this preservation operation is specially: preserve the MAC Address of CM and the corresponding relation of VLAN ID earlier, and after CM reaches the standard grade, obtain the pairing VLAN ID of this CM, preserve the corresponding relation of this CM ID and VLAN ID afterwards.
Because CM has many usually to the data feedback channel of CMTS, and a plurality of CM can use same data feedback channel, therefore can also be by preserving the corresponding relation realization of CM to data feedback channel and the VLAN ID of CMTS.
In addition, also need to dispose the up outgoing interface of each vlan domain at network side.Dispose each VLAN and can realize by table 1, and when configuring interface, same VLAN can dispose a plurality of outgoing interfaces, and interface can be divided into main usefulness interface and spare interface, and same outgoing interface also can belong to a plurality of VLAN at the outgoing interface of network side.
| VLAN?ID | Outgoing interface sign (comprising backup interface) |
| 2 | 1/8/1 |
| 3 | 1/8/1 |
| 4 | 1/8/2(1/8/3) |
| ...?... | ...?... |
| 4094 | 1/7/1 |
| 4095 | 1/7/1 |
Table 1
Afterwards can be based on the above-mentioned realization message forwarding that is provided with.Comprise forwarded upstream and descending forwarding because message is transmitted, therefore respectively these two kinds of forwardings are described below.
The realization flow of realizing forwarded upstream as shown in Figure 2, corresponding following steps:
If CMTS has preserved the MAC Address of CM and the corresponding relation of VLAN ID, judge then whether CM belongs to vlan domain and be: judge the pairing VLAN ID of the MAC Address that whether has this CM in the described corresponding relation.And if CMTS has further preserved the corresponding relation of CM ID and VLAN ID, judge then whether CM belongs to vlan domain and be: judge in the corresponding relation of described CM ID and VLAN ID whether have the pairing VLAN ID of this CM.
The realization flow of realizing descending forwarding as shown in Figure 3, corresponding following steps:
Because the VLAN ID that carries in this message may be non-existent, therefore before execution in step 304, can judge earlier the pairing vlan domain of this VLAN ID current whether existence if there is no, then to abandon this message; If exist, then continue the processing of execution in step 304.
Then realized the message forwarding of up and down direction by above-mentioned two handling processes.
Among the present invention program, VLAN ID can be used to identify VLAN, also can be used to identify other colonies such as VPN and SERVICE, and therefore, set vlan domain is specifically as follows VLAN, VPN, SERVICE territory etc.
With specific embodiment the up and descending repeating process at vlan domain is described below.
Setting in advance as hereinbefore of present embodiment.Particularly, to be example according to the identification information setting of CM and the corresponding relation of VLAN ID, can preserve the MAC Address of CM and the corresponding relation of VLAN ID, this corresponding relation can provide by table 2.Wherein, a MAC Address can be set to and some VLAN can only be belonged to.
| The MAC Address of CM | VLAN under the MAC Address |
| 0000-0012-0023 | 3 |
| 0002-0e1f-00c3 | 3 |
| 0040-6002-03ad | 5 |
| ...?... | ...?... |
| 00fc-ffdb-1010 | 25 |
| X-Y-Z | X |
Table 2
Further, the corresponding relation of CM ID and VLAN ID can also be set, so that accelerate inquiry velocity.Owing to can preserve an online CM attribute list for all online CM among the CMTS, such as, CMTS preserves online CM attribute list when CM reaches the standard grade, have the information such as outgoing interface of CM in this attribute list, therefore, can directly the pairing VLAN id information of CM be added in this online CM attribute list.Specifically, can expand online CM attribute list, and after CM reaches the standard grade, search above-mentioned table 1, thereby obtain the pairing VLAN ID of this CM, then this VLAN ID is saved in the online CM attribute list after the expansion by CMTS.The online CM attribute list of having preserved VLAN ID is as shown in table 3.
| The CM sign | ... ... (other attribute that comprises outgoing interface and so on) | VLAN ID under the CM |
| 1 | ...?... | 112 |
| 2 | ...?... | 20 |
| ...?... | ...?... | ...?... |
| 100 | ...?... | 7 |
| ...?... | ...?... | ...?... |
Table 3
Basic process at the forwarded upstream of VLAN is identical with flow process shown in Figure 2, and is identical with flow process shown in Figure 3 at the basic process of the descending forwarding of VLAN.But, in above-mentioned steps 204, when CMTS adds the ID of VLAN under the CM that sends this message in the heading of message, can judge earlier whether determined outgoing interface is up outgoing interface, if then carry out the step that in message, adds VLAN ID; Otherwise, directly this message is sent by this outgoing interface.Similarly, in step 304, when CMTS increases VLAN ID entrained in the heading of this message in the DOCSIS of message control domain, can judge earlier also whether determined outgoing interface is up outgoing interface, if then carry out the step that increases VLAN ID; Otherwise, directly this message is sent by this outgoing interface.
Further, in above-mentioned steps 204 and 304, CMTS is identified for transmitting the outgoing interface of this message and specifically can realizes at different type of messages.Specifically, be unicast message if CMTS can determine this message, then can determine corresponding outgoing interface by two-layer retransmitting table, promptly obtain outgoing interface corresponding in the two-layer retransmitting table with this message.The processing of certainly, before can with good grounds destination address searching two-layer retransmitting table.Two-layer retransmitting table is specifically as shown in table 4.Wherein, for ease of transmitting, if MAC Address is PC's, then corresponding CM sign is necessary for effective value in this table 4, if MAC Address is the equipment that upstream Interface connect, then corresponding CM sign should be 0 and so on numerical value, and is invalid to represent.
| Target MAC (Media Access Control) address | The interface of this MAC correspondence | CM sign under the PC of this MAC correspondence | ... ... (other attributes) |
| 0002-0e1f-00c 3 | 1/1/1 | 112 | ...?... |
| 0040-6002-03 ad | 1/8/7 | 0 | ...?... |
| ...?... | ...?... | ...?... | ...?... |
| 00fc-ffdb-101 0 | 1/2/1 | 7 | ...?... |
Table 4
If message may be multicast message or broadcasting packet, then the present invention program also need preserve the online CM information among each VLAN in CMTS.The information of preserving online CM among each VLAN can realize by the sign chain that increases online CM in above-mentioned table 1, the table 1 that has increased behind the online CM sign chain is as shown in table 5, wherein, the chained list first address that is increased in the table 5 is the address of tabulation that belongs to the online CM sign of same VLAN.
| VLAN?ID | Outgoing interface sign (comprising backup interface) | Online CM sign chain |
| 2 | 1/8/1 | The chained list first address |
| 3 | 1/8/1 | The chained list first address |
| 4 | 1/8/2(1/8/3) | The chained list first address |
| ...?... | ...?... | The chained list first address |
| 4094 | 1/7/1 | The chained list first address |
| 4095 | 1/7/1 | The chained list first address |
Table 5
Afterwards, if CMTS determines that this message is multicast message or broadcasting packet, then can determine to send the outgoing interface of VLAN under the CM of this message, and the online CM information among definite this VLAN, determine the outgoing interface of HFC side under these online CM afterwards again according to online CM attribute list, with the outgoing interface of HFC side under determined VLAN outgoing interface and the online CM as the outgoing interface that is used to E-Packet.The forwarding of this moment is that message is broadcasted.
If be provided with table 5, then CMTS can also delete the relevant information of this CM further after CM rolls off the production line from identification list.
In addition, be multicast message if CMTS confirms this message, can also judge then whether self supports IGMP SNOOP, if support, then can transmit this multicast message by IGMP SNOOP flow process; Otherwise, execution is transmitted this message by this outgoing interface step.
Certainly, if it is unicast message that CMTS determines this message, and do not find corresponding two-layer retransmitting table, can also adopt above-mentioned scheme to determine interface at multicast and broadcasting, promptly determine the outgoing interface of the affiliated VLAN of CM of this message of transmission, and the outgoing interface of HFC side under the online CM among this VLAN, and with these outgoing interfaces as the outgoing interface that is used to E-Packet.The forwarding of this moment also is that message is broadcasted.
Above-mentioned E-Packet by outgoing interface after, the CM that receives judges according to the VLANID that carries in the message whether this CM can receive this message, if this VLAN ID is identical with the VLAN ID of this CM, then receives this message; Otherwise, abandon this message.
In the forwarding of up direction is handled, if, then can also learn source MAC and interface in two-layer retransmitting table, so that can transmit according to two-layer retransmitting table next time by the broadcast mode broadcasting packet.Similarly, in the forwarding processing for down direction, after E-Packeting, can learn the source MAC of this message.
In the foregoing description, the complete process flow that realizes the message forwarded upstream realizes that complete process flow that message downlink transmits then as shown in Figure 5 as shown in Figure 4.
The above only is the present invention program's preferred embodiment, not in order to limit protection scope of the present invention.
Claims (15)
1, a kind of method that realizes that message is transmitted, it is characterized in that, set in advance each vlan domain and corresponding ID, the CM in the network is assigned in each vlan domain, and dispose the up outgoing interface of each vlan domain at network side, this method further may further comprise the steps:
A.CMTS judges whether the CM that sends this message belongs to described default vlan domain after receiving the user side message, if not, then transmit, and finish this handling process according to normal forwarding process, otherwise, execution in step b;
B.CMTS is identified for transmitting the outgoing interface of this message, judge whether determined outgoing interface is the up outgoing interface of network side, if then in the heading of message, add the ID of vlan domain under the CM that sends this message afterwards this message to be transmitted to B-RAS by this outgoing interface; Otherwise, directly this message is forwarded by this outgoing interface.
2, method according to claim 1 is characterized in that, describedly CM in the network is assigned to each vlan domain is: preserve the identification information of the CM that is distributed and the corresponding relation of VLAN ID; Perhaps preserve data feedback channel between CM and the CMTS and the corresponding relation of VLAN ID.
3, method according to claim 2 is characterized in that, the identification information of described preservation CM and the corresponding relation of VLAN ID are: preserve the MAC Address of CM and the corresponding relation of VLAN ID; Judge among the described step a whether CM belongs to vlan domain and be: judge the pairing VLAN ID of the MAC Address that whether has this CM in the described corresponding relation;
The identification information of described preservation CM is with the corresponding relation of VLAN ID or be: preserve the MAC Address of CM and the corresponding relation of VLAN ID, and after CM is reaching the standard grade, obtain the pairing VLANID of this CM, the corresponding relation of preservation CM ID and VLAN ID; Judge among the described step a whether CM belongs to vlan domain and be: judge in the corresponding relation of described CM ID and VLAN ID whether have the pairing VLAN ID of this CM ID.
4, method according to claim 1 is characterized in that among the described step b, and the outgoing interface that CMTS is identified for transmitting this message is: after CMTS determines that this message is unicast message, obtain outgoing interface corresponding with this message in the two-layer retransmitting table.
5, method according to claim 4 is characterized in that, this method further comprises: CMTS preserves the attribute of each online CM when CM reaches the standard grade, and described attribute comprises the outgoing interface of the affiliated coaxial optical fiber hybrid network HFC side of CM at least;
Among the step b, before the outgoing interface of described CMTS in obtaining two-layer retransmitting table, further comprise: the destination address according to this message is searched two-layer retransmitting table, if there is corresponding two-layer retransmitting table, then carry out the step of obtaining corresponding outgoing interface in this two-layer retransmitting table, otherwise, determine the up outgoing interface of network side of the affiliated vlan domain of this CM, and determine in this vlan domain the outgoing interface of HFC side under the online CM, with the outgoing interface of HFC side under up outgoing interface of described network side and the described online CM as the outgoing interface that is used to E-Packet.
6, method according to claim 1 is characterized in that, this method further comprises: CMTS preserves the attribute of each online CM when CM reaches the standard grade, and described attribute comprises the outgoing interface of the affiliated HFC side of CM at least;
Among the step b, the outgoing interface that described CMTS is identified for transmitting this message is: after the type of determining this message is multicast or broadcasting packet, determine the up outgoing interface of network side of the affiliated vlan domain of this CM, and determine in this vlan domain the outgoing interface of HFC side under the online CM, with the outgoing interface of HFC side under up outgoing interface of described network side and the described online CM as the outgoing interface that is used to E-Packet.
7, method according to claim 6, it is characterized in that among the described step b, described CMTS is after definite this message is multicast message, and before this message is forwarded by this outgoing interface, further comprise: judge self whether to support the IGMP protocol massages to intercept IGMP SNOOP, if then this multicast message is transmitted by IGMP SNOOP flow process; Otherwise, execution is transmitted this message by this outgoing interface step.
8, a kind of method that realizes that message is transmitted, it is characterized in that, set in advance each vlan domain and corresponding ID, the CM in the network is assigned in each vlan domain, and dispose the up outgoing interface of each vlan domain at network side, this method further may further comprise the steps:
A.CMTS judges in the heading of this message whether carried VLANID after receiving the network side message, if not, then transmit, and finish this handling process according to normal forwarding process, otherwise, execution in step B;
B.CMTS is identified for transmitting the outgoing interface of this message, increases this VLAN ID in the control domain of this message, afterwards this message is forwarded by this outgoing interface.
9, method according to claim 8, it is characterized in that, describedly CM in the network is assigned to each vlan domain is: preserve the identification information of the CM that is distributed and the corresponding relation of VLAN ID, perhaps preserve CM to the data feedback channel of CMTS and the corresponding relation of VLAN ID.
10, method according to claim 8 is characterized in that among the described step B, and the described outgoing interface that is identified for transmitting this message is: after CMTS determines that this message is unicast message, obtain outgoing interface corresponding with this message in the two-layer retransmitting table.
11, method according to claim 10 is characterized in that, this method further comprises: CMTS preserves the attribute of each online CM when CM reaches the standard grade, and described attribute comprises the outgoing interface of the affiliated HFC side of CM at least;
Among the step B, before the outgoing interface of described CMTS in obtaining two-layer retransmitting table, further comprise: the destination address according to this message is searched two-layer retransmitting table, if there is corresponding two-layer retransmitting table, then carry out the step of obtaining corresponding outgoing interface in this two-layer retransmitting table, otherwise, determine the up outgoing interface of network side of the affiliated vlan domain of CM of this message of transmission, and determine in this vlan domain the outgoing interface of HFC side under the online CM, with the outgoing interface of HFC side under up outgoing interface of described network side and the described online CM as the outgoing interface that is used to E-Packet.
12, method according to claim 8 is characterized in that, this method further comprises: CMTS preserves the attribute of each online CM when CM reaches the standard grade, and described attribute comprises the outgoing interface of the affiliated HFC side of CM at least;
Among the step B, the outgoing interface that described CMTS is identified for transmitting this message is: after determining that this message is multicast or broadcasting packet, determine the up outgoing interface of network side of the affiliated vlan domain of CM of this message of transmission, and determine in this vlan domain the outgoing interface of HFC side under the online CM, with the outgoing interface of HFC side under the up outgoing interface of network side of vlan domain under the CM of described this message of transmission and the described online CM as the outgoing interface that is used to E-Packet.
13, method according to claim 12, it is characterized in that among the described step B, described CMTS is after definite this message is multicast message, and before this message is forwarded by this outgoing interface, further comprise: judge whether self supports IGMP SNOOP, if then this multicast message is transmitted by IGMP SNOOP flow process; Otherwise, execution is transmitted this message by this outgoing interface step.
14, method according to claim 8 is characterized in that, further comprise before the described step B: CMTS judges that whether the pairing vlan domain of VLAN ID in this heading exists, and if there is no, then abandons this message; Otherwise, execution in step B.
15, method according to claim 8 is characterized in that before message is forwarded, further comprising among the described step B: remove the VLAN ID in the heading of this message.
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| CN103581059A (en) * | 2012-07-23 | 2014-02-12 | 华为技术有限公司 | Two-layer access method, device and system in HFC network |
| CN102769557B (en) * | 2012-08-09 | 2015-08-12 | 深圳市共进电子股份有限公司 | A kind of transmission method of business datum message and device |
| CN103840974B (en) * | 2014-02-26 | 2017-04-05 | 广西广播电视信息网络股份有限公司 | It is a kind of to solidify the method that local zero configuration is realized in address based on C CMTS |
| CN106452832B (en) * | 2016-08-26 | 2019-04-19 | 广西广播电视信息网络股份有限公司 | A kind of method that C-CMTS equipment precisely obtains configuration parameter |
| CN106330969B (en) * | 2016-10-31 | 2019-07-02 | 成都广达新网科技股份有限公司 | A kind of packet identification method during CM is online in CMC system |
| CN109104353B (en) * | 2018-09-21 | 2021-04-30 | 新华三信息安全技术有限公司 | Data transmission method and device |
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