WO2011110029A1 - 一种分组传送网络接入环中主机路由可达的方法及系统 - Google Patents
一种分组传送网络接入环中主机路由可达的方法及系统 Download PDFInfo
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- WO2011110029A1 WO2011110029A1 PCT/CN2010/078661 CN2010078661W WO2011110029A1 WO 2011110029 A1 WO2011110029 A1 WO 2011110029A1 CN 2010078661 W CN2010078661 W CN 2010078661W WO 2011110029 A1 WO2011110029 A1 WO 2011110029A1
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
- H04L12/42—Loop networks
- H04L12/437—Ring fault isolation or reconfiguration
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
- H04L12/46—Interconnection of networks
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L45/00—Routing or path finding of packets in data switching networks
- H04L45/02—Topology update or discovery
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L45/00—Routing or path finding of packets in data switching networks
- H04L45/66—Layer 2 routing, e.g. in Ethernet based MAN's
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L61/00—Network arrangements, protocols or services for addressing or naming
- H04L61/09—Mapping addresses
- H04L61/10—Mapping addresses of different types
- H04L61/103—Mapping addresses of different types across network layers, e.g. resolution of network layer into physical layer addresses or address resolution protocol [ARP]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
- H04L12/46—Interconnection of networks
- H04L12/4641—Virtual LANs, VLANs, e.g. virtual private networks [VPN]
Definitions
- the present invention relates to a packet transport network (PTN) technology, and more particularly to a method and system for achieving host reachability in a PTN network access ring.
- PTN packet transport network
- FIG. 1 is a topology diagram of a PTN network access ring model.
- a Layer 2 ring network is interconnected by nodes on a Layer 2 access ring, and between nodes 1 and 2 Heartbeat line composition.
- Each node on the Layer 2 access ring is configured with a host address.
- the host address configured by the node is on the same network segment as the Layer 3 interface address of the node connected to the Layer 3 routing ring.
- the two ports of the aggregation node 1 connected to the Layer 2 access ring are configured in VLAN 100, the Layer 3 address is set to 100.1.1.253/24, and the aggregation node 2 is connected to the Layer 2 access ring.
- the two ports are configured in VLAN 100 and the Layer 3 address is 100.1.1.254/24.
- the Layer 2 access ring node 1 is configured with VLAN 100
- the Layer 3 address is 100.1.1.1/24
- the Layer 2 access node 2 is configured with VLAN 100.
- the Layer 3 address is 100.1.1.2/24
- the access node N is configured with VLAN 100 and the Layer 3 address is 100.1.1.N/24.
- STP Spanning Tree Protocol
- the loop is blocked by STP to ensure that the Layer 2 access ring does not generate broadcast storms.
- the broadcast storm is that the data packets are cyclically forwarded in the Layer 2 access ring to form a storm and fill all the bandwidth of the link.
- the node configuration of the Layer 3 routing ring The Layer 3 interface is interconnected and the Layer 3 routing protocol is enabled.
- the aggregation nodes 1 and 2 connected to the Layer 2 access ring redistribute the direct route and the static route in the dynamic routing protocol.
- Node 1 or sink node 2 because the core node and other networks do not have routes to all access nodes carried by another sink node, resulting in all access nodes carried by another sink node being unable to interact with the core node and others.
- the network performs normal communication. Summary of the invention
- the main purpose of the present invention is to provide a method and a system for the reachability of a host in a PTN network access ring to solve the problem that the heartbeat between the access nodes and the sink node in the access ring simultaneously breaks.
- the invention provides a method for the reachability of a host route in a PTN network access ring, including: setting a linkage function between an address resolution protocol (ARP) module and a static route module on a Layer 3 interface of the aggregation node;
- ARP address resolution protocol
- the aggregation node automatically updates the static route entry of the learned host node corresponding to the host address according to the learned ARP entry of each access node; the aggregation node will learn the currently accessed access section.
- the static route corresponding to the host address is advertised to the core node and other networks according to the dynamic routing protocol.
- the method before the association function between the ARP module and the static routing module is set on the Layer 3 interface of the aggregation node, the method further includes:
- VLAN virtual local area network
- STP virtual local area network
- the aggregation node connected to the access node is configured with STP transparent transmission, direct connection route, and static route.
- the Layer 3 interface of the Layer 3 routing ring is configured with Layer 3 interface interconnection and dynamic routing protocol.
- the method further includes: after the core node and other networks receive the notification, the aggregation node, the core node, and other networks update corresponding dynamic routing entries in the respective dynamic routing tables.
- the aggregation node automatically updates the static route entry of the learned host address corresponding to the access node according to the learned ARP entry of the access node in real time, as follows:
- the ARP module of the aggregation node detects whether there is a new ARP. If the new APR entry is added, the aggregation node further determines whether the host address in the added ARP entry is on the same network segment as the Layer 3 interface address of the aggregation node. When the same network segment is determined, the aggregation node is based on the newly added ARP.
- the entry automatically adds a static routing entry for the corresponding host address of the access node.
- the aggregation node automatically updates the static route entry of the learned host address corresponding to the access node according to the learned ARP entry of the access node in real time, as follows:
- the ARP module of the aggregation node detects whether an ARP entry is deleted.
- the aggregation node further determines whether the host address in the deleted ARP entry is in the same network segment as the Layer 3 interface address of the aggregation node.
- the aggregation node automatically deletes the ARP entry according to the deleted ARP entry.
- the static route entry of the access node corresponding to the host address is the static route entry of the access node corresponding to the host address.
- the present invention also provides a system in which a host route is reachable in a PTN network access ring, including: a sink node and an access node;
- the aggregation node is configured to automatically update the static route entry of the learned access node corresponding to the host address according to the learned ARP entry of each access node, and statically route the currently learned access node corresponding to the host address. Notify to the core node and other networks according to the dynamic routing protocol;
- An access node configured to learn an ARP entry by the sink node.
- the system further includes: a core node and other networks; wherein, the core node is configured to receive, according to the dynamic routing protocol, a static route corresponding to the host address of the currently learned access node that is advertised by the sink node;
- the other network is configured to receive, according to the dynamic routing protocol, a static route corresponding to the host address of the currently learned access node that is advertised by the sink node.
- the sink node includes two or more sink nodes; the core node includes more than one core node; and the access node includes two or more access nodes.
- the aggregation node is further configured to update a corresponding dynamic routing entry in the dynamic routing table after the core node and other networks receive the notification; the core node is further used to receive the core node and other networks.
- the corresponding dynamic routing entry in the dynamic routing table is updated; the other network is further used to update the corresponding dynamic routing entry in the dynamic routing table after the core node and other networks receive the notification.
- the aggregation node is specifically configured to: the ARP module of the aggregation node detects whether a new ARP entry is added, or has a deleted ARP entry, and determining that the aggregation node further determines the added or deleted ARP entry. Whether the host address is in the same network segment as the Layer 3 interface address of the aggregation node. When the network segment is determined to be in the same network segment, the static route entry corresponding to the host address of the access node is automatically added or deleted according to the newly added ARP entry. Protocol, advertised to core nodes and other networks.
- the method and system for the reachable host route in the PTN network access ring provided by the present invention, because the sink node sends the static route corresponding to the host address of the access node to the core according to the dynamic routing protocol.
- Heart nodes and other networks such that when the heartbeat between the access nodes and the sink nodes in the access ring simultaneously breaks, the core node and other networks still have access nodes to all the access nodes of the other sink node. Routing, so that all access nodes carried by another sink node can communicate normally with the core node and other networks, thereby improving the ability of the access node in the PTN network to resist failure.
- Figure 1 is a topological structural diagram of a PTN network access ring model
- FIG. 2 is a schematic flowchart of a method for implementing reachable host routes in a PTN network access ring according to the present invention
- FIG. 3 is a schematic flowchart of a method for configuring a PTN network before use
- FIG. 4 is a schematic flow chart of a method for implementing the first embodiment
- FIG. 5 is a schematic flow chart of a method for implementing the second embodiment
- FIG. 6 is a schematic structural diagram of a system for implementing a reachable host route in a PTN network access ring according to the present invention. detailed description
- the method for implementing reachable host routes in the PTN network access ring is as shown in FIG. 2, and includes the following steps:
- Step 201 Set a linkage function between the ARP module and the static routing module on the Layer 3 interface of the aggregation node.
- the linkage switch between the ARP module and the static routing module can be set on the Layer 3 interface of the aggregation node. After the switch is turned on, the linkage function can be implemented.
- the implementation of the linkage function is specifically: After the ARP module learns the ARP entry of the access node, the static routing module automatically sends a message related to learning the ARP entry of the access node; after receiving the message, the static routing module receives the message. Set a static route entry corresponding to the host address of the corresponding access node according to the ARP entry in the message. Step 202: The sink node automatically updates the static route entry of the learned host node corresponding to the host address according to the learned ARP entry of each access node.
- the aggregation node 1 learns the ARP entry of the access node 1 of 100.1.1.1, it is static in itself.
- a static route entry of 100.1.1.1/32 is added to the routing table, and 32 represents a 32-bit mask.
- the aggregation node 1 learns the ARP entry of 100.1.1.1 of the access node 1, which is in the ARP module of the aggregation node 1.
- the aggregation node automatically updates the learned static route entry of the host address corresponding to the access node according to the learned ARP entry of each access node.
- the learned ARP entry of each access node refers to an ARP entry that learns each access node in the same network segment as the Layer 3 interface of the sink node; the ARP module of the sink node first detects the access to be learned. Whether the Layer 3 interface in the ARP entry of the node is an ARP entry of the access node on the same network segment as the Layer 3 interface of the sink node. If yes, learn. If not, discard the ARP entry of the corresponding access node. .
- Step 203 The sink node advertises the static route corresponding to the host address of the currently learned access node to the core node and other networks according to the dynamic routing protocol.
- the aggregation node, the core node, and other networks update the corresponding dynamic routing entries in their respective dynamic routing tables.
- the aggregation node can advertise to the core node and other networks by sending a static route message of the currently learned access node corresponding to the host address to the core node and other networks.
- the method further includes:
- Step 301 Configure a VLAN on the access node of the Layer 2 access ring, and configure a host address, and then perform step 302.
- the configuration of the host address is to configure the Layer 3 address.
- the Layer 3 address configured on the same network segment as the Layer 3 interface address of the node connected to the Layer 3 routing ring.
- the two ports of the aggregation node 1 connected to the Layer 2 access ring are configured in VLAN 100, and the Layer 3 address is set to 100.1.1.253/24.
- the aggregation node 2 is connected to the Layer 2 access ring.
- the two ports are configured in VLAN 100, the Layer 3 address is 100.1.1.254/24, the Layer 2 access ring node 1 is configured with VLAN 100, the Layer 3 address is 100.1.1.1/24, and the Layer 2 access node 2 is configured with VLAN 100.
- the layer address is 100.1.1.2/24, and so on.
- the access node N is configured with VLAN 100 and the Layer 3 address is set to 100.1.1. ⁇ /24»
- Step 302 Configure the STP and the dual-gateway default route on the access node of the Layer 2 access ring, and configure the STP transparent transmission, the direct connection route, and the static route on the aggregation node connected to the access node, and then perform step 303. ;
- the configuration of the dual-gateway default route refers to two default route configurations, that is, two aggregation nodes.
- the role of the default route is: If no route matching the destination address is found in the routing table of the access node, The ingress node sends the packet to the two aggregation nodes.
- the direct connection route may be specifically used to notify the local network segment to other nodes through a dynamic routing protocol
- the static route refers to assigning a fixed Internet Protocol (IP) address to a Media Access Control (MAC) address corresponding to the node, and guiding the transmission of the packet data.
- IP Internet Protocol
- MAC Media Access Control
- Step 303 Configure a Layer 3 interface interconnection and a dynamic routing protocol on the nodes of the Layer 3 routing ring.
- the nodes of the Layer 3 routing ring include: a convergence node, a core node, and other networks; the other network may be a mobile network, or an Internet, etc.; the dynamic routing protocol,
- the nodes specifically used for the Layer 3 routing ring exchange the information of each other, and automatically calculate the optimal path of the data transmission according to the function provided by the dynamic routing protocol, thereby obtaining a dynamic routing table.
- the aggregation node learns the ARP entries of each access node in real time according to the connection status of the access nodes of the access ring. Therefore, there are two cases of increasing the host route and deleting the host route.
- Embodiment 1 is a diagrammatic representation of Embodiment 1:
- This embodiment is directed to the process of adding a host route, and describes a process in which the aggregation node advertises to the core node and other networks.
- the implementation process is as shown in FIG. 4, and includes the following steps:
- Step 401 Configure a Layer 3 interface interconnection and a dynamic routing protocol on the node of the Layer 3 routing ring, and then perform Step 402.
- the nodes of the Layer 3 routing ring include: a convergence node, a core node, and other networks; the other network may be a mobile network, or the Internet.
- Step 402 Configure the STP and the dual-gateway default route on the access node of the Layer 2 access ring, and configure the STP transparent transmission, the direct connection route, and the static route on the aggregation node connected to the access node, and then perform step 403. ;
- Step 403 Set a linkage function between the ARP module and the static routing module on the Layer 3 interface of the aggregation node, and then perform step 404;
- Step 404 The ARP module of the aggregation node detects whether a new ARP entry is added. If yes, step 405 is performed. Otherwise, the current processing flow is ended.
- an ARP request is sent to the sink node.
- the sink node After receiving the ARP request, the sink node returns a corresponding ARP response to the access node and adds it to its own ARP cache table.
- Corresponding ARP entry when the ARP module finds that the ARP entry in the ARP cache table increases, step 405 is performed.
- Step 405 The aggregation node further determines whether the host address in the added ARP entry is in the same network segment as the Layer 3 interface address of the sink node. If yes, go to step 406. Otherwise, End the current processing flow;
- the determining whether the host address in the added ARP entry is in the same network segment as the Layer 3 interface address of the sink node is as follows: determining the IP address of the host in the added ARP entry and the IP address of the Layer 3 interface of the sink node If the addresses are the same, if they are the same, go to step 406 on the same network segment. Otherwise, end the current processing flow.
- the IP address of the access node host is 100.1.1.1/24 and the IP address of the Layer 3 interface of the aggregation node is 100.1.1.253/24, the IP address of the access node host and the aggregation node are considered.
- the IP address of the Layer 3 interface is the same. If the IP address of the access node is 200.1.1.1/24 and the IP address of the Layer 3 interface of the aggregation node is 100.1.1.253/24, the IP address and aggregation node of the access node are considered to be the same.
- the IP address of the Layer 3 interface is different.
- Only the host address of the access node on the same network segment as the Layer 3 interface address of the aggregation node can be learned by the aggregation node. That is, only the host address of the access node on the same network segment can be added to the aggregation node.
- ARP entry in the ARP cache table Generally, the host address of the access node that is not in the same network segment as the Layer 3 interface address of the sink node can be learned by the sink node. The purpose of this step is to ensure the host address in the added ARP entry. It is in the same network segment as the Layer 3 interface address of the aggregation node.
- Step 406 The aggregation node automatically adds a static route entry corresponding to the host address of the access node according to the newly added ARP entry, and then performs step 407;
- Step 407 The aggregation node advertises the newly added static route to the core node and other networks according to the dynamic routing protocol, and ends the current processing flow.
- the sink node can advertise to the core node and other networks by sending a message to the core node and other networks for the static route of the new access node corresponding to the host address.
- the aggregation node, the core node, and other networks After the core node and other networks receive the advertisement, the aggregation node, the core node, and other networks add dynamic routing entries corresponding to the static route to their dynamic routing tables.
- Embodiment 2 This embodiment describes a process of deleting a host route and reporting the aggregation node to the core node and other networks.
- the implementation process is as shown in FIG. 5, and includes the following steps:
- Step 501 Configure a Layer 3 interface interconnection and a dynamic routing protocol on the node of the Layer 3 routing ring, and then perform Step 502;
- the nodes of the Layer 3 routing ring include: a convergence node, a core node, and other networks; the other network may be a mobile network, or the Internet.
- Step 502 Configure the STP and the dual-gateway default route on the access node of the Layer 2 access ring, and configure the STP transparent transmission, the direct connection route, and the static route on the aggregation node connected to the access node, and then perform step 503. ;
- Step 503 The association function between the ARP module and the static routing module is set on the Layer 3 interface of the aggregation node, and then step 504 is performed;
- Step 504 The ARP module of the aggregation node detects whether there is an ARP entry deletion. If yes, step 505 is performed. Otherwise, the current processing flow is ended.
- the ARP module of the aggregation node sets an aging timer for each ARP entry in the ARP cache table.
- a timer is triggered.
- the timer is triggered when it is not used within 30 seconds.
- the aggregation node sends an ARP request to the access node. If the ARP response returned by the access node is not received, the ARP module deletes the ARP entry in the ARP cache table, and then proceeds to step 505.
- the duration of the timer is generally set to 15 ⁇ 20 minutes.
- Step 505 The aggregation node further determines whether the host address in the deleted ARP entry is in the same network segment as the Layer 3 interface address of the sink node. If yes, step 506 is performed; otherwise, the current processing flow is ended;
- the determining whether the host address in the deleted ARP entry is in the same network segment as the Layer 3 interface address of the sink node is as follows: determining the IP address of the host in the deleted ARP entry and the IP address of the Layer 3 interface of the sink node Whether the addresses are the same, if they are the same, they are executed on the same network segment. Step 506, otherwise, the current processing flow is ended.
- the IP address of the access node host is 100.1.1.1/24 and the IP address of the Layer 3 interface of the aggregation node is 100.1.1.253/24, the IP address of the access node host and the aggregation node are considered.
- the IP address of the Layer 3 interface is the same. If the IP address of the access node is 200.1.1.1/24 and the IP address of the Layer 3 interface of the aggregation node is 100.1.1.253/24, the IP address and aggregation node of the access node are considered to be the same.
- the IP address of the Layer 3 interface is different.
- Only the host address of the access node on the same network segment as the Layer 3 interface address of the aggregation node can be learned by the aggregation node. That is, only the host address of the access node on the same network segment can be added to the aggregation node.
- the host address of the access node that is not on the same network segment as the Layer 3 interface address of the aggregation node can be learned by the aggregation node. The purpose of this step is to ensure The host address in the deleted ARP entry is in the same network segment as the Layer 3 interface address of the aggregation node.
- Step 506 The aggregation node automatically deletes the static route entry corresponding to the host address of the access node according to the deleted ARP entry, and then proceeds to step 507;
- Step 507 The aggregation node deletes the dynamic routing entry corresponding to the static route from the dynamic routing table, and advertises to the core node and other networks according to the dynamic routing protocol, and ends the current processing process.
- the sink node can advertise to the core node and other networks by sending a message to the core node and other networks to delete the static route of the host node corresponding to the host address.
- the core node and other networks After receiving the advertisement, the core node and other networks delete the dynamic routing entries corresponding to the static route from their dynamic routing tables.
- the present invention further provides a system in which a host route is reachable in a PTN network access ring, and the system includes: a sink node 61 and an access node 62; wherein, the sink node 61, For automatically updating the learned static route entry of the host node corresponding to the host address according to the learned ARP entry of each access node, and accessing the currently learned access
- the static route corresponding to the host address of the node is advertised to the core node and other networks according to the dynamic routing protocol;
- the linkage function between the ARP module and the static routing module is set on the Layer 3 interface of the aggregation node 61;
- the aggregation node 61 includes more than two aggregation nodes.
- the access node 62 is configured to learn an ARP entry by the sink node 61.
- the access node 62 includes more than two access nodes.
- the system may further include: a core node 63 and other networks 64.
- the core node 63 is configured to receive, according to the dynamic routing protocol, a static route corresponding to the host address of the currently learned access node that is advertised by the sink node 61.
- the core node 63 includes more than one core node.
- the other network 64 is configured to receive, according to the dynamic routing protocol, a static route that is advertised by the sink node 61 to learn the host address of the access node;
- the convergence node 61 is specifically configured to:
- the ARP module of the sink node 61 detects whether a new ARP entry is added, or has a deleted ARP entry. If so, the sink node 61 further determines whether the host address in the added or deleted ARP entry is equal to the Layer 3 interface address of the sink node. On the same network segment, if yes, the static route entry corresponding to the host address of the access node is automatically added or deleted according to the newly added ARP entry, and is advertised to the core node 63 and other networks 64 according to the dynamic routing protocol.
- the aggregation node 61 is further configured to be configured with an STP transparent transmission, a direct connection route, and a static route, and is also configured to be configured with a Layer 3 interface interconnection and a dynamic routing protocol.
- the access node 62 is further configured to configure a VLAN network and a host address, and configure an STP and a gateway default route.
- the core node 63 is further configured to be configured with a Layer 3 interface interconnection and a dynamic routing protocol.
- the other network 64 is further configured to be configured with a Layer 3 interface interconnection and a dynamic routing protocol.
- the aggregation node 61 is further configured to update the corresponding dynamic routing entry in the dynamic routing table after the core node 63 and the other network 64 receive the notification;
- the core node 63 is further configured to update the corresponding dynamic routing entry in the dynamic routing table after the core node 63 and the other network 64 receive the notification;
- the other network 64 is further configured to update the corresponding dynamic routing entry in the dynamic routing table after the core node 63 and the other network 64 receive the notification.
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RU2012137184/08A RU2526749C2 (ru) | 2010-03-11 | 2010-11-12 | Способ и система реализации достижимости маршрута к хосту в кольце доступа сети передачи пакетов |
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CN101771618B (zh) | 2014-04-09 |
RU2012137184A (ru) | 2014-04-20 |
BR112012022549B1 (pt) | 2021-06-01 |
EP2533475A4 (en) | 2016-12-07 |
RU2526749C2 (ru) | 2014-08-27 |
CN101771618A (zh) | 2010-07-07 |
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