CN1319340C - Ethernet multi-ring scheduling method - Google Patents
Ethernet multi-ring scheduling method Download PDFInfo
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- CN1319340C CN1319340C CNB2003101119170A CN200310111917A CN1319340C CN 1319340 C CN1319340 C CN 1319340C CN B2003101119170 A CNB2003101119170 A CN B2003101119170A CN 200310111917 A CN200310111917 A CN 200310111917A CN 1319340 C CN1319340 C CN 1319340C
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Abstract
The present invention relates to the field of communication, particularly to an Ethernet multi-ring scheduling method. A distribution processing method is adopted, service in a ring and transannular service can be respectively processed, division of work of an LER and an LSR is unequivocal, and data packets can be simply exchanged. According to a destination station number, the processing is carried out. Lots of enquiry for list items is avoided. The processing time delay for nodes is little. The LSR can be matched according to user's requirements. The user's investment is protected. The method is suitable for MPLS L2 VPN. The method can lead a device to satisfy high performance requirements under the conditions that few parameters are set and the cost is little.
Description
Technical field:
The present invention relates to network communication, especially many ring scheduling of Ethernet.
Background technology:
Encircle in the scheduling at Ethernet at present, industry has multiple implementation more, but has the equipment more complicated, and expense is big, and manual intervention is many, the problem that intelligent degree is not high.Along with the development of optical-fiber network, on SDH equipment, data packet traffic is carried out the requirement that transparent mapped can not adapt to network; And at present vpn service is a newly-increased professional bright spot of telecom dealer, and that industry realizes that the scheme of VPN has is multiple, is exactly one of them based on the ethernet ring network of SDH; But there is the equipment complexity in most of producers in many ring scheduling of ethernet ring network, bandwidth waste, and time-delay becomes very big, the problem that intelligent degree is not high yet along with the increase of the complexity of network.
The objective of the invention is to: provide a kind of Ethernet to encircle dispatching method more.
Summary of the invention:
Scheduling professional in the ring is finished by different modules respectively with the outer service dispatching of ring; The concrete following steps that adopt:
A, by control plane all nodes in each TLS territory are set up the totally interconnected virtual connections of multiple spot at LER end; According to the position of destination node in network topology, virtual connections is distributed different point of destination periods for this reason; If destination node in this ring, is provided with scheduling professional in the ring and is finished by different modules respectively with the outer service dispatching of ring; The concrete following steps that adopt: the point of destination period of this virtual connections is the node number of LER in this ring; If destination node not in this ring, is provided with the point of destination period of this virtual connections the station period of LSR in the cost ring; At control plane target MAC (Media Access Control) address and virtual connections are bound, when packet enters LER, add point of destination period, MPLS label and the VClabel that obtains according to target MAC (Media Access Control) address in the packet header of packet, then packet is carried out being mapped in the virtual container of SDH after the GFP encapsulation;
B, when packet during in the SDH transmission over networks, at the LER node bag is separated mapping from the virtual container of SDH and comes out, detect the point of destination period in packet packet header; If the purpose website is this node, just this bag is taken off from ring, just can find its output port again according to the VC label of data packet head; Period is inequality if stand, and is remapped to continue downstream in the virtual container of SDH to transmit;
C, equally packet is separated mapping at the LSR node, inquire about its point of destination period, if point of destination period and our station period are inequality, then this packet is the business in the ring, continues to transmit downstream; If the point of destination period is identical with the our station period, then this bag is a transannular packet, just can obtain new go out central port and new point of destination period DN according to the MPLS label in packet header again, MPLS label and VC label, this packet is carried out label to be replaced, again after carrying out the GFP encapsulation, be mapped to another SDH Virtual Channel, just finished the scheduling of transannular; If this LSR has a plurality of Ethernet looped networks, just can finish many ring scheduling of Ethernet.
The present invention can just can make equipment satisfy very high performance requirement under few parameter of configuration and very little condition of cost.
This distributed approach; can handle respectively professional in encircling and transannular business; and the division of labor of LER and LSR is clear and definite; exchange to packet also becomes simple; as long as handle according to the point of destination period, avoided a large amount of list item inquiries, the processing time-delay of node is also very little; and can match LSR according to user's demand, protect user's investment.
Description of drawings:
Accompanying drawing 1 is the logical channel system schematic of TLS territory at the SDH network;
Accompanying drawing 2 is that Ethernet data wraps in the encapsulation format figure in the SDH frame;
Accompanying drawing 3 is serial networking mode figure;
Accompanying drawing 4 is ethernet ring network distributed scheduling networking diagrams of the present invention
Execution mode:
Business based on MPLS L2 VPN has VLL and TLS, and many ring scheduling of VLL business are fairly simple, are that example describes in detail with the TLS business here.We know when setting up a TLS territory in the MPLS network, all set up a Virtual Channel in logic between the website in all TLS territories, red part as Fig. 1 (is the networking diagram of Ethernet based on the SDH network among Fig. 1, LER1, LER2, LER3, LER5 form a TLS territory jointly), and with point of destination period DN, MPLS label and three these Virtual Channels of parameter identification of VC label, we pass through the study to target MAC (Media Access Control) address and source MAC at management plane, and this Virtual Channel and target MAC (Media Access Control) address are bound; When a packet when LER enters network, just can obtain a Virtual Channel of having bound according to the target MAC (Media Access Control) address of packet, add three parameters of this Virtual Channel in the packet header of this packet, we have just finished the encapsulation to packet, as Fig. 2; Then this packet is when the MPLS Network Transmission, as long as we detect, and point of destination period, MPLS label and the VC label of this packet just can deliver to the purpose website to this bag.
TLS professional it be a multi-point interconnection, institute forms totally interconnected virtual netted web frame a little, on logical channel, we just can directly visit the interconnection that regard point-to-point as to 2, and on the networking of physical channel, industry has multiple implementation:
Mode one: use all equipment a VC passage to be connected in series, red part as Fig. 3, this mode is a looped network in fact, but that gives the user feels it is many ring scheduling, its shortcoming is, the inefficacy of any node is all influential to whole network, and along with the increase of network, its time-delay also increases, and management is also quite complicated.
Mode two: all nodes adopt the centralized control switch mode fully, and this pattern causes the equipment complexity of node, and cost is also very high.
The method of introducing below is that business in encircling is carried out distributed scheduling (at the LER end), and the transannular business is carried out centralized dispatching (at the LSR end), and it is simple to make Ethernet encircle the function of scheduler module so more, and cost is also just corresponding cheaper.
Processing mode of the present invention is the classification that each LER can both finish packet, encapsulation and packet switch, LSR only exchanges with the packet header parameter packet and replaces, on the physical channel of SDH, LER and LSR are connected in series the composition ethernet ring network with a VC4 or other virtual containers, a plurality of such ethernet ring networks couple together at the LSR place, form tangent rings, LSR separates mapping to the packet on all rings, the ring number of tabling look-up and obtaining out ring according to header packet information, just can exchange to another ring to packet from a ring, finish many rings scheduling feature of Ethernet, as Fig. 4;
Operation principle is as follows:
A. by control plane all nodes in each TLS territory are set up the totally interconnected virtual connections of multiple spot at the LER end, according to the position of destination node in network topology, virtual connections is distributed different point of destination periods for this reason, if destination node in this ring, is provided with the node number of the point of destination period of this virtual connections for LER in this ring; If destination node not in this ring, is provided with the point of destination period of this virtual connections the station period of LSR in the cost ring.At control plane target MAC (Media Access Control) address and virtual connections are bound, when packet enters LER, add point of destination period, MPLS label and the VC label that obtains according to target MAC (Media Access Control) address in the packet header of packet, then packet is carried out being mapped in the virtual container of SDH after the GFP encapsulation.
B. when packet during in the SDH transmission over networks, at the LER node bag being separated mapping from the virtual container of SDH comes out, detect the point of destination period in packet packet header, if the purpose website is this node, just this bag is taken off from ring, just can find its output port again according to the VC label of data packet head,, be remapped to and continue downstream in the virtual container of SDH to transmit if the station period is inequality.
C. equally packet is separated mapping at the LSR node, inquire about its point of destination period, if point of destination period and our station period are inequality, then this packet is the business in the ring, continues to transmit downstream; If the point of destination period is identical with the our station period, then this bag is a transannular packet, just can obtain new go out central port and new point of destination period DN according to the MPLS label in packet header again, MPLS label and VC label carry out label to this packet and replace, again after carrying out the GFP encapsulation, be mapped to another SDH Virtual Channel, just finished the scheduling of transannular, if this LSR has a plurality of Ethernet looped networks, just can finish the many rings scheduling of Ethernet, as the networking diagram at the LSR2 place of Fig. 4.
Claims (1)
1, a kind of Ethernet encircles dispatching method more, it is characterized in that: scheduling professional in the ring is finished by different modules respectively with the outer service dispatching of ring; The concrete following steps that adopt:
A, by control plane all nodes in each TLS territory are set up the totally interconnected virtual connections of multiple spot at LER end; According to the position of destination node in network topology, virtual connections is distributed different point of destination periods for this reason; Scheduling professional in the ring is set to be finished by different modules respectively with the outer service dispatching of ring, the concrete following steps that adopt: if destination node is in this ring, the point of destination period of this virtual connections is the node number of LER in this ring, if destination node not in this ring, is provided with the point of destination period of this virtual connections the station period of LSR in the cost ring; At control plane target MAC (Media Access Control) address and virtual connections are bound, when packet enters LER, add point of destination period, MPLS 1 abe1 and the VC 1abe1 that obtains according to target MAC (Media Access Control) address in the packet header of packet, then packet is carried out being mapped in the virtual container of SDH after the GFP encapsulation;
B, when packet during in the SDH transmission over networks, at the LER node bag is separated mapping from the virtual container of SDH and comes out, detect the point of destination period in packet packet header; If the purpose website is this node, just this bag is taken off from ring, just can find its output port again according to the VC 1abe1 of data packet head; Period is inequality if stand, and is remapped to continue downstream in the virtual container of SDH to transmit;
C, equally packet is separated mapping at the LSR node, inquire about its point of destination period, if point of destination period and our station period are inequality, then this packet is the business in the ring, continues to transmit downstream; If the point of destination period is identical with the our station period, then this bag is a transannular packet, just can obtain new go out central port and new point of destination period DN according to the MPLS 1abe1 in packet header again, MPLs 1 abe1 and vc 1abe1, this packet is carried out label to be replaced, again after carrying out the GFP encapsulation, be mapped to another SDH Virtual Channel, just finished the scheduling of transannular; If this LSR has a plurality of Ethernet looped networks, just can finish many ring scheduling of Ethernet.
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| Application Number | Priority Date | Filing Date | Title |
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| CNB2003101119170A CN1319340C (en) | 2003-10-28 | 2003-10-28 | Ethernet multi-ring scheduling method |
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| CNB2003101119170A CN1319340C (en) | 2003-10-28 | 2003-10-28 | Ethernet multi-ring scheduling method |
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| CN1319340C true CN1319340C (en) | 2007-05-30 |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5341374A (en) * | 1991-03-01 | 1994-08-23 | Trilan Systems Corporation | Communication network integrating voice data and video with distributed call processing |
| EP1303082A2 (en) * | 2001-10-15 | 2003-04-16 | Alcatel | Transparent LAN-to-LAN connection between two customer locations through a RPR data transport network |
| EP1328090A1 (en) * | 2002-01-09 | 2003-07-16 | Alcatel | Topology discovery method, a related system and related node |
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2003
- 2003-10-28 CN CNB2003101119170A patent/CN1319340C/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5341374A (en) * | 1991-03-01 | 1994-08-23 | Trilan Systems Corporation | Communication network integrating voice data and video with distributed call processing |
| EP1303082A2 (en) * | 2001-10-15 | 2003-04-16 | Alcatel | Transparent LAN-to-LAN connection between two customer locations through a RPR data transport network |
| EP1328090A1 (en) * | 2002-01-09 | 2003-07-16 | Alcatel | Topology discovery method, a related system and related node |
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