CN1878114A - RPR address binding method - Google Patents

Abstract

The invention discloses an elastic sectionalization ring address binding method in the network transmission technological domain, which is characterized by the following: realizing the binding of RRP ring node MAC address and IP address through ATD frame in the extended RPR protocol; without adding extra system resource consumption; converging rapidly for topology after the RPR looped network occurs switching; providing address binding information for over three layered report to transfer and utilize.

Description

RPR address binding method

Technical field

The present invention relates to the transmission network technology, particularly the resilient packet ring technology in the transmission network.

Background technology

Universal day by day along with the Internet and broadband access, in more and more many backbone transport networks at different levels, data service surpasses speech business gradually, becomes the dominant traffic of transmission network.Resilient Packet Ring (Resilient Packet Ring; abbreviation " RPR ") technology is a kind of new type of Media access control (Medium Access Control that data service transmits that optimizes on loop configuration; be called for short " MAC ") layer protocol; it has absorbed the economy and SDH (Synchronous Digital Hierarchy) (the SynchronousOptical Network of Ethernet (Ethernet); be called for short " SDH ") system's 50 milliseconds of (ms) ring protections characteristic; constructed the double layer network that adapts to the Ethernet data transmission; (the Quality of Service that possesses service quality can be provided on existing optical-fiber network; be called for short " QoS ") management and high efficiency data traffic transmission; be the most effective Ethernet data service transferring mode, be suitable for data; voice and Video Applications.The RPR technology is in physical layer, synchronous digital hierarchy (Synchronous Digital Hierarchy for example, be called for short " SDH ") and data equipment between increased the level of a loop service management, by this loop SML, can the implementation space reuse, functions such as fair access, intelligence are switched, path optimization, statistic multiplexing, can be applied in and carry out the transmission that high efficient band width is utilized in the metropolitan area network.

Because the competition emphasis of communication network operator has turned to metropolitan area network from backbone network, the multiple services metropolitan area of support of setting up high-efficiency and economic transmits the common objective that net has become each big operator.At present, the RPR technology can be divided into two kinds in the application mode that the metropolitan area transmits in the net, promptly based on SDH/ Synchronous Optical Network (Synchronous Optical Network, abbreviation " SONET ") multiservice transport platform (the Multi-Service Transport Platform of embedded RPR, be called for short " MSTP ") equipment and based on the RPR equipment of ethernet physical layer (PHY), also be called MSTP equipment and the pure RPR equipment of embedded RPR in the industry usually.From the network application scope, the MSTP of embedded RPR is applicable to that construction is with time division multiplexing (Time Division Multiplexing, be called for short " TDM ") professional for the master data business is the Incumbent network of assisting, and the network upgrade transformation that the data service transfer capability is provided under the prerequisite of the existing SDH network of compatibility; And pure RPR equipment is applicable to construction so that the carrier network of data packet services to be provided, particularly the network of taking as the leading factor with emerging data service at the very start.

The MSTP equipment of present embedded RPR realizes that mainly 2 layers of message of user directly encapsulate RPR form heading, going up ring then transmits, realize professional transparent transmission EVPL (Ethernet VirtualPrivate Line, be called for short " EVPL ") or the forwarding business model of static layer 2 virtual private network (Layer 2Virtual PrivateNetworking is called for short " L2VPN ").

The MSTP equipment network that Ethernet data is carried on embedded RPR as shown in Figure 1.

In network as shown in Figure 1, transmitting with the message from the router one to the router two is example explanation message forwarding.The access message of router one inserts side at MSTP device node (NODE) 1 and at first inserts processing, according to encircling destination node in the MAC Address route querying, encapsulation RPR header, carry out Generic Framing Procedure (General Framing Procedure then, be called for short " GFP ")/Link Access Procedure (Link Access Procedure-SDH on SDH (Synchronous Digital Hierarchy), be called for short " LAPS ")/peer-peer protocol (Point to Point Protocol, be called for short " PPP ") encapsulation, be mapped to the SDH frame structure at last again, after process SDH equipment is sent to the opposite end, again the encapsulation of packet is peeled off from level to level, at first be that the SDH frame is mapped to data message, to the GFP/LAPS/PPP decapsulation, be reduced into the RPR frame, remove RPR frame head information again, the Layer 2 data message is transmitted to the node 3 of MSTP equipment after, be transmitted to the router two of access then.

Wherein, node 1 is to the protocol processes level of transmitting the data message process between the node 3 as shown in Figure 2 in the RPR looped network of Fig. 1.Level from agreement, only finish based on MAC address learning or function of exchange on the data forwarding plane, perhaps based on multiprotocol label switching (Multi-Protocol LabelSwitching, abbreviation " MPLS ") label is realized transparent transmission service, professional configuration feature is only finished on the key-course plane, and RPR and Link Capacity Adjustment Scheme (Link Capacity Adjusting Scheme is called for short " LCAS ") protocol function.

In RPR looped network shown in Figure 1, each node is by safeguarding the information of all nodes in a topology data-base recording looped network.These information are used to loop selection and topology protection, and these information also help Network Management and maintenance in addition.These database informations are after finding that by broadcast nature between RPR looped network interior nodes (Attribute Discovery is called for short " ATD ") frame carries out exchange message, to form the stable topology database of loopful then.For example, the topological database of node 1 is as shown in the table among Fig. 1.

Local MAC	Hop count for ringlet0	Hop count for ringlet1	Station preference s	Station name	West neighbor′s MAC	East neighbor′s MAC	West receive link availabili ty	East receive link availabili ty
									23-45-67- 78-30-45	0	0	JP＝1 WP＝1	NODE1	23-45-67- 78-30-46	23-45-67- 78-30-49	IDLE	IDLE
23-45-67- 78-30-46	1	4	JP＝1 WP＝1	NODE2	23-45-67- 78-30-45	23-45-67- 78-30-47	IDLE	IDLE
									23-45-67- 78-30-47	2	3	JP＝1 WP＝1	NODE3	23-45-67- 78-30-46	23-45-67- 78-30-48	IDLE	IDLE
23-45-67- 78-30-48	3	2	JP＝1 WP＝l	NODE4	23-45-67- 78-30-47	23-45-67- 78-30-49	IDLE	IDLE
									23-45-67- 78-30-49	4	1	JP＝1 WP＝l	NODE5	23-45-67- 78-30-48	23-45-67- 78-30-45	IDLE	IDLE

The ATD frame is the control frame of a kind of expansion in the RPR agreement, is used to transmit topology information, and its transmission frequency is 1 hertz (Hz), and the form of ATD frame is as shown in the table.

31～ 24	23	22	21	20	19	18	17	16	15	14	13	12	11	10	9	8	7	6	5	4	3	2	1	0
																									TTL	RI	FE	FT		SC		WE	0	Destination node DA (high 16)
Destination node DA (low 32)
																									Source node S A (high 32)
Source node S A (low 16)									TTLBase								E F	F I	P S	SO		Keep the position
																									HEC									ControlType								ControlVersion
Contrc.DataUnit (random length)
																									FCS (low 16)

Wherein, life span (Time To Live, be called for short " TTL ") fields account is with 8 bits (bit); The 8bit that follows ttl field closely is ring control (RingControl) field; Destination node address (DestinationAddress is called for short " DA ") is the MAC Address of the destination node of a 48bit; Source node address (Source Address is called for short " SA ") is the MAC Address of the source node of a 48bit; The TTLBase field store during transmission initialized TTL be worth constantly; What follow the TTLBase field closely is long expanded ring control (the Extended Ring Control) field of 8bit; Head error control (Header ErrorControl is called for short " HEC ") the long 16bit of field is cyclic redundancy check (CRC) (Cyclic Redundancy Check is called for short " the CRC ") sign indicating number of HEC field head before; Control types (ControlType) and control version (ControlVersion) field respectively take 1 byte (byte), the relevant information that is used to carry this control frame, and in the ATD frame, the value of ControlType is Topology, i.e. topology; Control data unit (ControlDataUnit) field of 32bit and ControlType, ControlVersion field are formed control payload (Control Payload) jointly; Frame Check Sequence (Frame Check Sequence is called for short " FCS ") field is the verification sequence of the Control Payload of a long 32bit.

The detailed description of relevant RPR specifically can be referring to Institute of Electrical and Electronics Engineers's (InstituteofElectrical and Electronics Engineers is called for short " IEEE ") 802.17 agreements.

Because the RPR looped network itself is a kind of network of two layers of link layer, there is not identification nodes internetworking agreement (Internet Protocol in the topological database, be called for short " IP ") address and network segment information, like this, just can't directly realize the message that three layer protocols are above, for example the message of transmission control protocol/internetworking protocol agreement (Transmission Control Protocol/Internet Protocol is called for short " TCP/IP ") agreement, Routing Protocol, mpls protocol is transmitted.In order to realize the message forwarding more than three layer protocols, just need be the node configuration corresponding IP address on the RPR ring, so that it is to the equipment more than three layers, as router etc. as seen, and need obtain the MAC Address of node on the RPR ring and the corresponding relation of IP address.

The prior art scheme is by address resolution protocol (Address Resolution Protocol, abbreviation " ARP ") the IP address corresponding that dynamically obtains each node configuration on the RPR ring with its MAC Address, thus realize the MAC Address of node on the RPR looped network and the binding of IP address.

For node configuration on the RPR looped network behind the IP address, the MSTP equipment network of embedded RPR is as shown in Figure 3.

Communication is an example between node 1 among above Fig. 3 and the node 3.Wherein, the MAC Address of node 1 is 23-45-67-78-30-45 (being designated as MAC1), and the IP address is 192.9.2.15 (being designated as IP1); The MAC Address of node 3 is 23-45-67-78-30-47 (being designated as MAC3), and the IP address is 192.9.2.25 (being designated as IP3); Each node all is kept at the MAC Address of itself and the corresponding relation of IP address.If the router one under the node 1 is thought the router three under the access node 3, node 1 must obtain the IP3 address of node 3, and this just needs to realize by the ARP agreement.Process with the Ping order is the process that example explanation ARP agreement is set up below: at first node 1 is by Ping command lookup node 3, and the target MAC (Media Access Control) address in the ARP request is full F, and purpose IP address is for being IP3, and source MAC is MAC1, and source IP is IP1; Then, this ARP request message is broadcasted on the RPR looped network by RPR looped network broadcast capability; Then, node 3 is received this message and relatively behind the address of purpose IP address for itself, [MAC1, IP1] to being recorded in the local ARP list item, and notice RPR module renewal relevant information (comprising RPR message encapsulation header information); At last, node 3 sends arp responses, and source MAC is MAC3, and source IP is IP3, and purpose MAC is MAC1, and purpose IP is IP1, after node 1 is received this arp response message, to being recorded in the local ARP list item, and notifies RPR node updates information [MAC3, IP3].

In actual applications, there is following problem in such scheme: the prior art scheme realizes complicated, need the extra network bandwidth and RPR to handle resource, and after the RPR looped network was switched, topological convergence speed is slow.

Cause the main cause of this situation to be, the prior art scheme need be carried out communication between ARP agreement and RPR agreement, the ARP agreement needs to notify the RPR agreement behind the corresponding relation of learning MAC and IP, again by the content of RPR agreement according to the topology database, upgrade the RPR packaging information of ARP adjacency list, increased protocol complexities like this, realize more complicated, simultaneously, also need certain bandwidth resources to carry out inter-node communication when the node study MAC of RPR ring and the corresponding relation of IP, need the extra link bandwidth of loss, in addition, because the prior art scheme is the process of dynamically setting up and learning, therefore after the RPR looped network is switched, topological convergence speed is slow, also needs some RPR additional treatments resources.

Summary of the invention

In view of this, main purpose of the present invention is to provide a kind of RPR address binding method, make the binding that realizes RRP link point MAC Address and IP address under the situation that additional system resources consumes not increasing, and after the RPR looped network was switched, topology can restrain fast.

For achieving the above object, the invention provides a kind of RPR address binding method, comprise following steps:

A is each the node configuration media access control address and the internetworking protocol address of described Resilient Packet Ring;

B is in the Topology Discovery process of described Resilient Packet Ring, and each node broadcasts Attribute Discovery frame wherein carries the binding relationship of media access control address and internetworking protocol address;

Each node of C is resolved the described Attribute Discovery frame of receiving, obtains described binding relationship and upgrades the topology information that is kept at local described Resilient Packet Ring in view of the above.

Wherein, the binding relationship that sends of described node is that the media access control address and the internetworking protocol address of this node configuration is right.

In addition, described method also comprises following steps:

The described node of D is set up loopful static address analysis protocol adjacency list in the stable back of described topology information according to described topology information;

E transmits message more than three layers according to described static address analysis protocol adjacency list.

In addition, described static address analysis protocol adjacency list can be used the form of address resolution protocol chained list.

In addition, the index value of described static address analysis protocol adjacency list is next jumping or purpose internetworking protocol address.

In addition, described step e also comprises following substep:

The described node of E1 is searched to transmit and is obtained this message next hop information;

E2 with described next hop information as index search described static address analysis protocol adjacency list and obtain the media access control address of next jumping;

E3 encapsulates the Resilient Packet Ring header of described message according to the media access control address of next jumping and transmits.

In addition, in the described step e 1, described next hop information can be internetworking protocol address or tunnel label.

In addition, described node is the multiservice transport platform of embedded RPR protocol.

By relatively finding, the main distinction of technical scheme of the present invention and prior art is, by the ATD frame in the expansion RPR agreement, the information of in broadcasting ATD frame, carrying MAC Address and IP address binding, realize the MAC Address of all RPR link points and the binding of IP address, this address binding information can be transmitted for message more than three layers and use.

Difference on this technical scheme, brought comparatively significantly beneficial effect, promptly at first, because the present invention program realizes the binding of MAC Address and IP address by expanding existing ATD frame, therefore do not need mutual between ARP agreement and the RPR agreement, simplified the realization of MAC Address and IP address binding greatly; The second, because the present invention program does not need extra bandwidth resources to carry out inter-node communication, saved the bandwidth resources of system, increased the throughput of system; The 3rd, because the broadcasting frequency of ATD frame is 1Hz, even change at the RPR ring-network topology like this, when switching, the MAC Address of obtaining other node that all nodes still can be very fast on the looped network and IP address binding information are also upgraded topology, convergence rate improves greatly, the stability when having increased the continuous service of system.

Description of drawings

Fig. 1 is the MSTP equipment network schematic diagram that Ethernet data is carried on embedded RPR;

Fig. 2 is that node 1 arrives the protocol processes level schematic diagram of transmitting the data message process between the node 3 in the RPR looped network shown in Figure 1;

Fig. 3 be for node configuration on the RPR looped network behind the IP address, the MSTP equipment network schematic diagram of embedded RPR;

Fig. 4 is the flow process according to the method for the binding MAC address on RPR of preferred embodiment of the present invention and IP address;

Fig. 5 is in the ATD frame, the MAC Address of carrying node and the Control Payload content schematic diagram of IP address;

Fig. 6 is an idiographic flow of transmitting message more than three layers in first preferred embodiment of the present invention according to the Static ARP adjacency list;

Fig. 7 is in the present invention's first preferred embodiment, the protocol hierarchy schematic diagram of supporting between node 1 and the node 3.

Embodiment

For making the purpose, technical solutions and advantages of the present invention clearer, the present invention is described in further detail below in conjunction with accompanying drawing.

The present invention program is by expanding existing RPR agreement, find (AttributeDiscovery in broadcast nature, abbreviation " ATD ") carries the MAC Address of this node and the corresponding relation of IP address in the frame, when transmitting topology information, realized the binding of RPR link point MAC Address and IP address.Because directly the expansion by the ATD frame realizes the MAC Address of RPR link point and the binding of IP address, therefore do not need to consume any extra resource, and since the expense that realizes with the ATD frame is little and per second broadcasting once, so each node forms the whole network, and stably the speed of topological database is very fast.

According to the flow process of the method for the binding MAC address on RPR of preferred embodiment of the present invention and IP address as shown in Figure 4.

At first enter step 400, the MAC Address and the IP address of configuration RPR node.This area those of ordinary skill know, because existing RPR agreement has only disposed the MAC Address of an identification RPR node, it is local identities of RPR looped network, do not give each RPR node distributing IP address on the RPR looped network, MAC Address and three layers of IP address are not directly got in touch, be carried on the RPR link layer and transmit in order to merge the IP/MPLS message, need to give each RPR node to distribute an IP address.Consider that RPR is a bidirectional loop network, though two ports of inner and outer ring are arranged, but concerning the user, be equal to, therefore in first preferred embodiment of the present invention, two inner and outer ring interface MAC and IP address, be normalized into the MAC and the IP address of node, encircling upward simultaneously, each node IP address allocated will satisfy in the same network segment.In first preferred embodiment of the present invention, for each RPR node distributed behind the IP address the networking schematic diagram as shown in Figure 3.

Then enter step 410, start the RPR agreement of RPR node.Wherein, control protocols such as Topology Discovery have been comprised in the PRR agreement.

Then enter step 420, the RPR node broadcasts is carried the ATD frame of MAC Address and IP address binding relation.In first preferred embodiment of the present invention, by expansion AT D frame, in broadcasting ATD frame, the MAC Address of this RPR node and the binding relationship of IP address have been carried, it also is the corresponding relation of this node MAC Address and IP address, so just can notify other node on the RPR ring with the MAC Address and the IP address binding relation of this node by broadcasting, and the information interaction that does not need agreement to see, do not need the extra network bandwidth, simultaneously because the frequency of ATD frame broadcasting is very fast, even therefore the topology change of RPR looped network also can reach the convergence of topological database very soon.Wherein, the ATD frame is used for Topology Discovery, in first preferred embodiment of the present invention, using the ControlDataUnit field in the ATD frame is that conduct is used to deposit MAC Address and the IP address is right, promptly deposits the MAC Address of this RPR node and the binding relationship of IP address.Wherein, in the ATD frame, the MAC Address of carrying node and the Control Payload content of IP address are as shown in Figure 5.Wherein, stored MAC Address in the tag types length value (Type LenthValue, be called for short " TLV ") and the IP address is right.

Then enter step 430, the RPR node upgrades topological database and writes down all node M AC addresses and IP address corresponding relation according to ATD.In first preferred embodiment of the present invention, the RPR node receives an ATD frame in RPR ring broadcasting, obtains the MAC Address of the RPR node that sends this ATD frame and IP address binding relation and it is recorded in the topological database by resolving ATD frame control payload.Wherein, compare with the topological database of prior art, the present invention program's topological database has also increased by one hurdle, IP address that has binding relationship with MAC Address.

Then enter step 440, judge that whether topology information is stable, if then enter step 450, otherwise returns step 420.Wherein, topology information whether judge by stable can whether the variation again according to topological database, after starting the change of RPR agreement or RPR ring-network topology, after after a while, all nodes have all resend the ATD frame of its MAC Address and IP address binding information on the RPR ring, all nodes have all been finished the renewal of topological database on the RPR ring, can think that topology information is stable if the information in the topological database no longer changes within a certain period of time.For example, in first preferred embodiment of the present invention, after topology information is stable, the topological database of node 1 such as following table.

local MAC	Local IP	Hop count for ringlet0	Hop count for ringlet1	Statio n prefer ences	Station name	West neighbor′s MAC	East neighbor′s MAC	West receive link availability	East receive link availability
										23-45-67- 78-30-45	129.9.2. 15/24	0	0	JP＝1 WP＝1	NODE 1	23-45-67- 78-30-46	23-45-67- 78-30-49	IDLE	IDLE
23-45-67- 78-30-46	129.9.2. 23/24	1	4	JP＝1 WP＝1	NODE 2	23-45-67- 78-30-45	23-45-67- 78-30-47	IDLE	IDLE
										23-45-67- 78-30-47	129.9.2. 25/24	2	3	JP＝1 WP＝1	NODE 3	23-45-67- 78-30-46	23-45-67- 78-30-48	IDLE	IDLE
23-45-67- 78-30-48	129.9.2. 28/24	3	2	JP＝1 WP＝1	NODE 4	23-45-67- 78-30-47	23-45-67- 78-30-49	IDLE	IDLE
										23-45-67- 78-30-49	129.9.2. 30/24	4	1	JP＝1 WP＝1	NODE 5	23-45-67- 78-30-48	23-45-67- 78-30-45	IDLE	IDLE

If in step 450, node is set up the static APR adjacency list of loopful according to topological database.Wherein, because the RPR ring has 255 nodes at most, so the node on the RPR ring is supported 255 Static ARP adjacency lists at most.Wherein, be used to search index value (KEY value) and the list item substance such as the following table of ARP adjacency list, promptly the KEY value is next jumping/purpose IP address.

KEY
	32Bit
Next IP/Dst IP

Wherein, the table composed as follows of ARP adjacency list.Those of ordinary skill in the art as can be seen, the content of ARP adjacency list is the ATD frame that does not comprise ControlDataUnit and FCS field.

31～ 24	23	22	21	20	19	18	17	16	15	14	13	12	11	10	9	8	7	6	5	4	3	2	1	0
																									TTL	RI	FE	FT		SC		WE	0	Destination node DA (high 16)
Destination node DA (low 32)
																									Source node S A (high 32)
Source node S A (low 16)									TTLBase								E F	F I	P S	SO		Keep the position
																									HEC									ControlType								ControlVersion

Enter step 460 at last, transmit message more than three layers according to the Static ARP adjacency list.In first preferred embodiment of the present invention, owing to realized the binding of all RPR node M AC addresses and IP address, can obtain next hop information according to the message more than three layers that receives, next-hop ip address for example, be index value then with the next hop information, obtain the MAC Address of next jumping by searching the ARP adjacency list, thereby realize the forwarding of message more than three layers on the RPR ring.

In first preferred embodiment of the present invention, the idiographic flow that step 460 is transmitted message more than three layers according to the Static ARP adjacency list as shown in Figure 6.

At first enter step 600, RPR link point searches route forwarding table according to message or Label Forwarding Information Base obtains this message next hop information.Wherein, this message is a message more than three layers, can be the MPLS/IP message, and its next hop information can be the IP address, also can be tunnel (Tunnel) label.

Then enter step 610, search the RPR link point MAC Address that the ARP chained list obtains next jumping.Wherein, owing to realized the binding of RPR node IP address and MAC Address before, therefore promptly can be as index value by searching the MAC Address of obtaining next jumping with the IP address.

Enter step 620 at last, the RPR header is encapsulated on the message transmits.In first preferred embodiment of the present invention, the RPR header that comprises next-hop mac address is encapsulated on the message, be forwarded to other nodes of RPR looped network, thereby realize the message forwarding capability more than three layers.

Those of ordinary skill in the art understands, and the application of the invention scheme binding RPR IP addresses of nodes and MAC Address promptly can realize in the RPR looped network business intercommunication more than three layers.In the present invention's first preferred embodiment, after the message of node 1 sends to node 3, after node 3 is peeled off the RPR heading, carry out route querying or label lookup according to the IP address or the TUNNEL label of message, be transmitted to the router in downstream then according to outgoing interface.Wherein, the protocol hierarchy of supporting between node 1 and the node 3 as shown in Figure 7.

Though by with reference to some preferred embodiment of the present invention, the present invention is illustrated and describes, those of ordinary skill in the art should be understood that and can do various changes to it in the form and details, and without departing from the spirit and scope of the present invention.

Claims (8)

1. a RPR address binding method is characterized in that, comprises following steps:

A is each the node configuration media access control address and the internetworking protocol address of described Resilient Packet Ring;

B is in the Topology Discovery process of described Resilient Packet Ring, and each node broadcasts Attribute Discovery frame wherein carries the binding relationship of media access control address and internetworking protocol address;

Each node of C is resolved the described Attribute Discovery frame of receiving, obtains described binding relationship and upgrades the topology information that is kept at local described Resilient Packet Ring in view of the above.

2. RPR address binding method according to claim 1 is characterized in that, the binding relationship that described node sends is that the media access control address and the internetworking protocol address of this node configuration is right.

3. RPR address binding method according to claim 1 is characterized in that, described method also comprises following steps:

The described node of D is set up loopful static address analysis protocol adjacency list in the stable back of described topology information according to described topology information;

E transmits message more than three layers according to described static address analysis protocol adjacency list.

4. RPR address binding method according to claim 3 is characterized in that, described static address analysis protocol adjacency list can be used the form of address resolution protocol chained list.

5. RPR address binding method according to claim 3 is characterized in that, the index value of described static address analysis protocol adjacency list is next jumping or purpose internetworking protocol address.

6. RPR address binding method according to claim 3 is characterized in that, described step e also comprises following substep:

The described node of E1 is searched to transmit and is obtained this message next hop information;

E2 with described next hop information as index search described static address analysis protocol adjacency list and obtain the media access control address of next jumping;

E3 encapsulates the Resilient Packet Ring header of described message according to the media access control address of next jumping and transmits.

7. RPR address binding method according to claim 6 is characterized in that, in the described step e 1, described next hop information can be internetworking protocol address or tunnel label.

8. RPR address binding method according to claim 1 is characterized in that, described node is the multiservice transport platform of embedded RPR protocol.

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