JP2003258829A - Ethernet controlling method, network, device, and method for controlling the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve the problem that setting is so complicated that unexpected switching can occur due to the setting in a method for ensuring reliability in a one station concentrated Ethernet network in which many P-P connections are gathered, which becomes a reliability technology for multipoint connection. <P>SOLUTION: To solve the problem, a P-P path is defined between an Ethernet device (3-2) and an Ethernet device (3-3) to perform communication between LANs #A in the Ethernet network (3-1). A P-P logic path between the Ethernet device (3-2) and the Ethernet device (3-3) is automatically set by exchanging a VLAN (virtual LAN) ID in the Ethernet network (3-1) between adjacent devices. An Ethernet device (3-4) constructs tables for VLAN IDs of the Ethernet device (3-2) side and VLAN IDs of the Ethernet device (3-3) side and switches logic paths on the basis of the table. The reliability of a logic path is ensured by setting the logic path with two routes which are primary and backup. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a VLAN (Virtual LA).
Ethernet network using N Identifier)
The present invention relates to an Ethernet control method, an Ethernet network, an Ethernet device, and a control method therefor when performing (Point to Point) communication.

[0002]

2. Description of the Related Art In the current Ethernet, VLAN is used and MAC
It is a technology that realizes multipoint connection based on switching by address. And the setting of that VLAN is
Must be done for hernet devices. And in protection technology, STP (Spanning Tree Protocol: IEEE8
There is a standardized technology called 02.1d) to prevent Ethernet loops, and it is applied to Ethernet protection. In addition, it is necessary to unify the VLANs in each Ethernet network.
There is no way to switch by LAN ID.

On the other hand, LDP (Label Distribution Protocol), which is a technology of MPLS (Multi Protocol Label Switching), is used as a method for automatically setting a P-P logical path, and MPLS label exchange is performed between adjacent devices. There is a method to automate the logical path setting between end to end by using the routing protocol OSPF.

[0004]

In one centralized type,
When considering an Ethernet network that performs P-P communication between edges, there is currently no setting of P-P logical paths. for that reason,
The protection technology in P-P communication will use multipoint connection technology. When using STP as the protection technology, the Blocked Port is automatically determined because the Blocked Port is determined by a plurality of parameters such as port cost and priority.
When the active link is disconnected, Blocked Port is released and the detour route is secured. After that, when the active link is restored, the Blocked Port is recalculated again, but the problem is to bring down the traffic to prevent the loop. In addition, since VLAN settings must be set in each device, setting mistakes and operation costs are issues in terms of operation. Then, when stacking VLANs, it is a method of stacking multiple VLAN multiplexed packets entering the same port with one VLAN ID, and it is not possible to select and stack any VLAN. Is.

[0005]

[Means for Solving the Problem] Edge in Ethernet network-
In order to perform P-P communication between edges, we propose a feature that sets a P-P logical path between edges using the VLAN ID in the IEEE802.1Q frame as a logical path identifier. .

According to the present invention, the P
-It is possible to define a logical path of P, and thereby it is possible to perform logical path level control.

Further, a second aspect of the present invention proposes that the VLAN IDs are exchanged between adjacent Ethernet devices and the setting of the logical path of P-P in the first aspect is automated.
MPLS (Multi Protocol Lab)
el Switching) LDP (Label Distribution Protocol)
There is an adjacent Eth with a VLAN ID instead of an MPLS label
It is exchanged between ernet devices. The information exchanged at that time is only the VLAN ID, which is an identifier.

According to the present invention, VLAN I is used between Ethernet devices.
It becomes possible to exchange D values and automatically set a logical path. Therefore, setting errors and operation costs can be reduced.

Further, in claim 3, the Ethernet device relaying in the Ethernet network by the control method according to claim 2 constructs a table of ports and VLAN IDs as shown in FIG. We propose a method that switches communication packets with VLAN IDs based on a table.

According to the present invention, an Ethernet device for relaying
By creating a VLAN ID table, MAC address resolution by broadcast is not required and switching by MAC address is not required.

According to a fourth aspect, the Ether according to the first aspect is provided.
OSP of routing protocol in rnet control method
One of the two is defined as a backup path by using F and the signaling protocol and setting two paths. In the switching operation, the control packet is exchanged between the edge devices, and when the control packet does not arrive for a certain time, the edge device recognizes that the primary path is abnormal and switches from the primary path to the backup path. Even if an error occurs, control packets will continue to be sent to the primary path at regular intervals, and the edge device will recognize that the primary path has recovered when packets are sent and received normally for a certain period of time, and switch back from the backup path to the primary path. I do. From these operations, we propose the one that features switching and switching back of the logical path between the edges of the Ethernet network.

According to the present invention, when the primary path is disconnected, it is automatically switched to the backup path, and when the primary path is recovered, both the primary path and the backup path are switched with the packet loss minimized. You can make a return.

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of the present invention will be described with reference to the drawings. Figure 1 shows Ethern using signaling
It is a figure explaining the method of setting a logical path in the et network.
As shown in Fig. 1, the VLAN ID and the preset Ethernet device ID are exchanged between the adjacent Ethernet devices.
Hernet device ID is large Obtain the VLAN ID from the device side,
As a result, a path is established between adjacent devices using the VLAN ID as a logical identifier, and this process is performed by each device, and the OSPF (Open Shortest Path) routing protocol is used.
First: The shortest route information between edges obtained in RFC2328) and VLAN ID are mapped to automate the setting of P-P logical paths between edges. here,
Mapping means Ether on the edge of the Ethernet network.
This is the acquisition of route information by assigning a VLAN ID using the port as a key in the rnet device.

FIG. 2 is a diagram for explaining the operation of switching using an VLAN in an Ethernet device in the Ethernet network. As shown in FIG. 2, assuming that bidirectional communication is performed on the same path in the Ethernet network, the Ethernet device, which is a relay device in the Ethernet network, has a VLAN ID, which is a logical identifier of a path for two input / output ports, Build a table of port # and based on its VLAN ID table, port, VLAN ID
Is used as a key to rewrite to another VLAN ID to switch the logical path.

FIG. 3 is a diagram for explaining the network configuration of the present invention. In the present embodiment, as shown in FIG. 3, a plurality of LANs are accommodated in the Ethernet device (3-2) and the Ethernet device (3-6) in the Ethernet network (3-1), and the Ethernet device (3-3) is accommodated. It is assumed that the LAN and P-P communication will be performed. Here, it is assumed that each LAN uses the same VLAN ID. Normally, it is returned by Ethernet network
Communication becomes possible between the Ethernet device (3-2) and the Ethernet device (3-6). Therefore, an arbitrary VLAN is stacked as a path for LAN # A between the Ethernet device (3-2) and the Ethernet device (3-3). Furthermore, a primary path and a backup path are set for that path. The setting method is similar to that of MPLS LDP. That is, the shortest route is calculated by the routing protocol OSPF and the shortest route is set as the primary path. The next shortest route is set as the backup path.

Ethernet device (3-2) as the primary path
-Ethernet device (3-4) -The path via the Ethernet device (3-3) is used, and the backup path is the Ethernet device (3-).
2) -Ethernet device (3-5) -Ethernet device (3-
3), the control packet is transmitted and received between the Ethernet device (3-2) and the Ethernet device (3-3) via the primary path. Ethernet device (3-2) when there is an error in the primary path where control packets cannot be received normally
And the Ethernet device (3-3) independently detect and switch to the backup path. And Ethernet device (3-2)
-Ethernet device (3-5) -While communication is being performed by the Ethernet device (3-3) and the backup path is being used, control packets are always sent to the Ethernet device (3-
2) -Ethernet device (3-4) -Ethernet device (3-
Communication is performed via the primary path of 3). When the link failure is recovered, Ethernet device (3-2), Ether
The rnet device (3-3) can normally send and receive the control packet. In that state, after a certain period of time, the backup path is autonomously switched back to the primary path.

The Ethernet device is a system having a configuration as shown in FIG. The communication system (4-1) includes MAC switches (4-2), (4-4), a switch fabric (4-3), and a control unit (4-5). The control unit (4-5) exchanges the VLAN ID and the preset Ethernet device ID between the adjacent Ethernet devices,
Acquire the VLAN ID from the device with a large Ethernet device ID. In the Ethernet device, which is a relay device in the Ethernet network, VLAN I, which is the logical identifier of the path, is used for two input / output ports.
Construct a table of D and port #, and switch the logical path based on the VLAN ID table. Also, Ethe
If the rnet device is at the edge of the Ethernet network, the routing protocol OSPF (Open Shortest Path First: RF)
C2328) edge-to-edge shortest route information and VLAN
By mapping ID, P-P between edges
The logical path is automatically set, the shortest route is set as the primary path, and the next shortest route is set as the backup path. When it detects an abnormal disconnection of the primary path, it switches to the backup path, always throws a control packet at a fixed time interval to the primary path even when there is an error, and recognizes that the primary path has recovered when it is transmitted and received normally for a fixed time or longer. Switch back from the backup path to the primary path. MAC switch (4-2),
The (4-4) receives the information about which port (which VLAN ID is given) to which the received Ethernet packet should be transferred from the control unit (4-5), and then rewrites the VLAN ID to switch fabric ( 4-3). The switch fabric (4-3) outputs Ethernet packets on the output port side as in the normal Ethernet switch fabric.
Send to the MAC switch (4-4), (4-2).

The operation of the Ethernet device will be described below with reference to the table example shown in FIG. Communication system (4-1)
Transmits and receives an Ethernet packet, but here, a case will be described in which the MAC switch (4-2) receives and the MAC switch (4-4) transmits. MAC switch (4-
The packet received in 2) is VL in the control unit (4-5).
It is compared with a table of AN ID, port combinations.
In the table shown in FIG. 4, physical ports 1 and 7 are Ether.
Since it is connected to a device outside the rnet network, no VLAN ID is set. Ethernet packet is physical port # 1
If it comes from, insert the VLAN tag and enter the VLAN ID.
After setting = 20, the data is transmitted from the physical port # 5. If the packet comes in from physical port # 2, VLAN I
Confirm D, and if VLAN ID = 100, VLAN ID = 200
To the physical port # 6. If the packet comes in through physical port # 3, the VL
Check the AN ID, and if the VLAN ID is 300, remove the VLAN tag and send out from physical port # 7.

A normal Ethernet switch has a table of MAC addresses, ports, and VLANs and performs switching by MAC address, whereas the Ethernet device of the present invention has a control unit as shown in the above description. VLAN I
It has a table of D and ports, and it does switching by VLAN ID instead of MAC address table.

As described above, the invention made by the present inventor is
Although specifically described based on the above embodiment, the present invention is
It is needless to say that the present invention is not limited to the above embodiment, and various changes can be made without departing from the scope of the invention.

[0021]

As described above, by enabling the setting of the P-P logical path between the edges in the Ethernet network as described in detail above, the logical path can be automatically set. This makes it possible to reduce setting errors and operation costs. And the Ethernet device that relays enables switching by logical path instead of switching by MAC address. Also, by setting a logical path between edges, a backup path can be set, and path level switching is realized.

[Brief description of drawings]

FIG. 1 is a diagram illustrating a method of setting a logical path in an Ethernet network using signaling.

FIG. 2 is a diagram illustrating an operation of performing switching using a VLAN in an Ethernet device in an Ethernet network.

FIG. 3 is a diagram illustrating a network configuration of the present invention.

FIG. 4 is a diagram illustrating a configuration of a communication system of the present invention.

[Explanation of symbols]

3-1 ... Ethernet network, 3-2 to 6 ... Ethernet device, 4-
1 ... Communication system, 4-2, 4 ... MAC switch, 4-3
... switch fabric, 4-5 ... control unit.

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Ichiro Inoue             2-3-1, Otemachi, Chiyoda-ku, Tokyo             Inside Telegraph and Telephone Corporation F-term (reference) 5K030 GA11 GA19 HA08 HB29 HC14                       HD07 JA07 LB05 MA04 MB01                       MC08 MD02 MD04                 5K033 AA04 AA05 CB08 DA05 DB18                       EA02 EA04 EA06 EB06 EC01                       EC03

Claims (14)

[Claims] 1. An Ethernet for performing point-to-point (P-P) communication between edges in an Ethernet network.
It is a control method, and
VLAN-ID (Virtual LAN Identifier) is used as a logical identifier, and P-P (Point to Point) connection between edges is set to P.
An Ethernet control method characterized by being defined as a P logical path. 2. The Ethernet control method according to claim 1, wherein a VLAN ID and a preset Ethernet device ID are exchanged between adjacent Ethernet devices, and
The VLAN ID from the device with a large device ID is acquired, and as a result, a path is established between the adjacent devices using the VLAN ID as a logical identifier, and this process is performed by each device. In addition, the routing protocol OSPF (Open Shortest Path Firs
t: The shortest route information between edges obtained by RFC2328)
It is characterized by automating the setting of P-P logical paths between edges by performing VLAN ID mapping.
Ethernet control method. 3. The control method according to claim 2, wherein Et
Assuming that bidirectional communication is performed through the same route in the hernet network, the Ethernet device, which is a relay device in the Ethernet network, has a logical path I
An Ethernet control method characterized by constructing a table of D and port # and switching logical paths based on the VLAN ID table. 4. The Ethernet control method according to claim 2, wherein a PP logical path is automatically set, but one of the two paths is defined as a backup path by setting two paths. When an abnormal disconnection of the primary path is detected between adjacent devices, they switch to the backup path independently of each other, and control packets are always sent to the primary path at fixed time intervals even when there is an error, and if normal transmission and reception are performed for a certain time or longer, the primary An Ethernet control method characterized in that a logical path is switched between edges of an Ethernet network by recognizing that the path has been recovered and switching back from the backup path to the primary path. 5. A P to P (Point to Poi) method between edges.
nt) communication is controlled in the Ethernet network, and the VLAN ID (Virtu
An Ethernet network characterized by defining a point-to-point (P-P) connection between edges as a logical path of P-P using al LAN Identifier) as a logical identifier. 6. The Ethernet network according to claim 5, wherein:
Exchanging VLAN IDs and preset Ethernet device IDs between adjacent Ethernet devices
The VLAN ID is obtained from the device side with a large number, and as a result, a path is established between the adjacent devices by using the VLAN ID as a logical identifier, and this process is performed by each device, and the OSPF (Open Shortest Path First) routing protocol is also used. : RF
C2328) edge-to-edge shortest route information and VLAN
By mapping ID, P-P between edges
Ether that is characterized by automatically setting the logical path of
rnet network. 7. The Ethernet network according to claim 6, wherein:
Assuming that bidirectional communication is performed on the same route in the Ethernet network, the Ethernet device, which is a relay device in the Ethernet network, has a VLAN that is a logical identifier of a path for two input / output ports.
Ethernet network characterized by constructing a table of ID and port # and switching logical paths based on the VLAN ID table. 8. The Ethernet network according to claim 6,
The P-P logical path is automatically set, but when two paths are set, one of them is defined as a backup path and when an abnormal disconnection of the primary path is detected between adjacent devices, they are mutually independent. Switch to the backup path,
Even if an error occurs, control packets are always sent to the primary path at fixed time intervals, and if transmission / reception is normally performed for a fixed time or longer, it is recognized that the primary path has recovered and switching back from the backup path to the primary path is performed.
An Ethernet network characterized by switching logical paths between edges of the rnet network. 9. The Ethernet network according to claim 6 is configured.
An Ethernet device, which includes a MAC switch for transmitting and receiving Ethernet packets, a switch fabric for switching by VLAN ID, and a control unit, wherein the control unit is a VLAN ID between adjacent Ethernet devices, and a preset Ethernet Exchange device IDs,
If the Ethernet device ID is large, the VLAN ID is obtained from the device side, the path is established between the adjacent devices using the VLAN ID as a logical identifier, and at the edge of the Ethernet network, the routing protocol OSPF (Open Shortest Path Firs) is added.
t: The shortest route information between edges obtained by RFC2328)
Ethernet characterized by VLAN ID mapping
apparatus. 10. The Ethernet device constituting the Ethernet network according to claim 7, comprising a MAC switch for transmitting and receiving Ethernet packets, a switch fabric for switching by a VLAN ID, and a control unit, wherein the control unit is When bidirectional communication is performed in the same path in the Ethernet network and relayed in the Ethernet network, the VLAN ID and port
An Ethernet device characterized by constructing a table of, and controlling to switch a logical path based on the VLAN ID table. 11. The Ethernet device constituting the Ethernet network according to claim 8, comprising a MAC switch for transmitting and receiving Ethernet packets, a switch fabric for switching by a VLAN ID, and a control unit, wherein the control unit is Although the P-P logical path is automatically set,
If it is at the edge of the Ethernet network, by setting two paths, one of them is defined as a backup path, and if abnormal disconnection of the primary path is detected between adjacent devices, they switch to the backup path autonomously. Even if an error occurs, the control packet is always sent to the primary path at a fixed time interval, and if it is transmitted and received normally for a fixed time or longer, it is recognized that the primary path has recovered, and switching back from the backup path to the primary path results in Ethernet.
An Ethernet device characterized by switching a logical path between edges of a network. 12. The method for controlling an Ethernet device according to claim 9, wherein a VLAN ID and a preset Ethernet device ID are exchanged between adjacent Ethernet devices,
If the Ethernet device ID is large, the VLAN ID is obtained from the device side, the path is established between the adjacent devices using the VLAN ID as a logical identifier, and at the edge of the Ethernet network, the routing protocol OSPF (Open Shortest Path Firs) is added.
t: The shortest route information between edges obtained by RFC2328)
Ethernet characterized by VLAN ID mapping
Device control method. 13. The method for controlling an Ethernet device according to claim 10, wherein when bidirectional communication is performed in the same path in the Ethernet network and relayed in the Ethernet network, two ports of input and output are used. Ethernet which is characterized by constructing a table of VLAN ID and port # which are logical identifiers of paths and switching the logical paths based on the VLAN ID table.
Control method of rnet device. 14. The method for controlling an Ethernet device according to claim 11, wherein the PP logical path is automatically set, but when the Ethernet path is at the edge of the Ethernet network, two paths are set. Therefore, if one of them is defined as a backup path and an abnormal disconnection of the primary path is detected between adjacent devices, they switch to the backup path independently of each other.
Even if an error occurs, control packets are always sent to the primary path at fixed time intervals, and if transmission / reception is normally performed for a fixed time or longer, it is recognized that the primary path has recovered and switching back from the backup path to the primary path is performed.
A method for controlling an Ethernet device, characterized in that a logical path is switched between edges of an rnet network.