WO2016198022A1 - Procédé de mise en oeuvre de recouvrement de réseau de virtualisation, et noeud de bord de virtualisation de réseau - Google Patents

Procédé de mise en oeuvre de recouvrement de réseau de virtualisation, et noeud de bord de virtualisation de réseau Download PDF

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Publication number
WO2016198022A1
WO2016198022A1 PCT/CN2016/087112 CN2016087112W WO2016198022A1 WO 2016198022 A1 WO2016198022 A1 WO 2016198022A1 CN 2016087112 W CN2016087112 W CN 2016087112W WO 2016198022 A1 WO2016198022 A1 WO 2016198022A1
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Prior art keywords
virtual network
network identifier
protocol
virtual
network
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PCT/CN2016/087112
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English (en)
Chinese (zh)
Inventor
王翠
张征
胡方伟
黄孙亮
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中兴通讯股份有限公司
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Publication of WO2016198022A1 publication Critical patent/WO2016198022A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L49/00—Packet switching elements
    • H04L49/20—Support for services
    • H04L49/201—Multicast operation; Broadcast operation
    • 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]
    • H04L12/4645—Details on frame tagging

Definitions

  • the present application relates to, but is not limited to, the field of network virtualization technologies, and in particular, to a method for implementing virtualized network overlay and a network virtualization edge node.
  • BIER Bit Index Explicit Replication
  • IETF Internet Engineering Task Force
  • the XYZW identifies the BitPosition, and each bit in the bit position corresponds to a BFR (bit-forwarding router) whose length identifies the bit string length (BitStringLength).
  • BFR bit-forwarding router
  • BitStringLength the bit string length
  • Each bit in the bit string corresponds to a BFR-id.
  • BitSting corresponding to BFR-1 with BFR-id of 1 is 00001
  • BitSting corresponding to BFR-2 with BFR-id of 2 is 00010, and so on.
  • BFR-1 is used as a BFIR (Bit-Forwarding Ingress Router).
  • BFR-1 determines which BFERs (Bit-Forwarding Egress Router, bits) in some way. The bit forwarding egress router) needs this multicast traffic.
  • BFR-2 and BFR-3 belong to the same subset Set Identifier, and both need the multicast traffic
  • BFERs that need this multicast traffic are corresponding.
  • the BFR-id is parsed into the set identifier SI, and the BitPosition corresponding to the BFR-2 and the BFR-3 is combined into a BitString.
  • the 00110 is encapsulated in the BIER header, and then extended by the IGP (Interior Gateway Protocol).
  • IGP Interior Gateway Protocol
  • the Bit Index Forwarding Table (BIFT) forwards the multicast data packet encapsulated with the BIER header.
  • IGP protocols mainly include the IS-IS (Intermediate System-to-Intermediate System) protocol and OSPF (Open Shortest Path First). Shortest path first) protocol.
  • Figure 2 shows the IS-IS protocol to support the BIER technology protocol extension IS-IS LSA (Link-State Advertisement);
  • Figure 3 shows the OSPF protocol extension OSPF-LSA to support the BIER technology.
  • the network node no longer needs to support the multicast protocol and maintain the multicast per-flow state, which greatly simplifies the implementation of the multicast control plane and the performance of the network node.
  • the BIER technology effectively utilizes the current IGP protocol, and only needs to make a small extension to the current IGP protocol to implement and improve multicast deployment.
  • BIER technology can also be combined with current software-defined networking technologies to mitigate obstacles to the development of future software-defined networks.
  • NVO3 Network Virtualization using Overlays over Layer 3
  • VXLAN Virtual eXtensible Local Area Network
  • Virtualization technology enables each physical server to be virtualized into multiple virtual machines (Virtual Machines, VMs). Virtual machines in the same VLAN (Virtual Local Area Network) domain can communicate with each other. However, since the VLAN only supports 4096, the number of current tenants is greatly limited. Moreover, due to the large Layer 2 network structure of the current data center, in order to prevent loops, the Spanning Tree Protocol is used, which also causes a large number of ports or links to be invalidated and wasted. Furthermore, three-tier IP technology is gradually introduced into the data center. This means that when virtual machines belonging to different networks need to communicate, they need to span not only the Layer 2 network but also the Layer 3 network. With the development of various reasons, Virtual Scalable Local Area Network (VXLAN) came into being.
  • VXLAN Virtual Scalable Local Area Network
  • VXLAN uses a 24-bit Virtual Network Identifier (VNI) to identify the VXLAN domain, which supports 16M VXLAN users.
  • VNI Virtual Network Identifier
  • VXLAN is an overlay technology. VXLAN technology can mark the original packet with the VXLAN identifier and then encapsulate it in the tunnel to the remote end. The virtual machines belonging to the same tenant are interoperable.
  • BUM traffic Broadcast ⁇ Unknown ⁇ Multicast, broadcast ⁇ unknown ⁇ multicast
  • ARP Address Resolution Protocol
  • ND Neighbor Discovery Protocol
  • DHCP Dynamic Host Configuration Protocol
  • mDNS multicast DNS (Domain Name System)
  • FIG. 4 the technical architecture of the current NVO3 is as shown in FIG. 4, in which Server (Server) 1/Server 2/Server 3 are respectively virtualized into different virtual machines VM1 to VM6, belonging to different tenants.
  • NVE Network Virtualization Edge
  • Figure 5 shows the packet header structure of the VXLAN data plane.
  • Figure 6 shows the tunnel message data structure after NVE encapsulation.
  • the NVE After the data plane is forwarded, the NVE encapsulates the original packet in the VXLAN packet header, encapsulates the outer tunnel according to the destination IP address of the tunnel corresponding to the VXLAN, and then unicasts the packet to the remote NVE.
  • VM1 After the data flow of the initiating tenant A reaches the NVE1, the NVE1 encapsulation carries a VXLAN header with a VNI (Virtual Network Identifier) of 1. Then, the outer tunnel is encapsulated according to the tunnel destination IP address NVE2 corresponding to the VXLAN, and then forwarded to the far end. End NVE2.
  • VNI Virtual Network Identifier
  • the remote NVE2 After receiving the packet, the remote NVE2 decapsulates the outer tunnel and forwards the packet to the VM3 of the tenant network A belonging to the VXLAN according to the VNI in the VXLAN packet header.
  • the forwarding of tenant B and tenant C is similar.
  • a VNI specifically refers to a VXLAN Network Identifier.
  • the current NVO3 deployment is shown in Figure 7.
  • VM1 and VM3 and VM5 belong to the same tenant.
  • the first method is to perform ingress replication on the NVE1 endpoint to copy the multicast traffic.
  • the VXLAN packet headers are encapsulated respectively, and the destination IP addresses (NVE2 and NVE3) of the multiple tunnels corresponding to the VXLAN are further encapsulated and sent to different remote NVE2s and NVE3s.
  • this method only works for small networks, when the tenant network When the network is large, there is a large amount of burden on the ingress end to replicate the multicast packets. At the same time, the bandwidth between the NVEs is also wasted.
  • the mapping of the destination address of the VXLAN to the tunnel on the NVE requires additional control plane technology to assist in the delivery.
  • the second method is to establish a multicast distribution tree by using a protocol independent multicast (PIM) on the network between the NVEs. Then, after receiving the BUM message, the NVE1 checks the VXLAN to which the BUM message belongs. Then, the multicast group mapping corresponding to the VXLAN is searched, and the BUM message is encapsulated in the VXLAN packet header, and then forwarded along the multicast distribution tree of the corresponding multicast group established between the NVEs.
  • PIM protocol independent multicast
  • This method can solve the burden of the ingress endpoint and the bandwidth between the NVEs to a certain extent, but it needs to run the Layer 3 PIM protocol between the NVEs, and also needs to maintain the multicast tree across the network, and to another extent Network complexity and configurability.
  • the VXLAN mapping of multicast groups on the NVE also requires additional control plane technology to assist in the delivery.
  • the embodiment of the invention provides a method for implementing virtualized network overlay and an NVE node, so as to alleviate various disadvantages of the current data center for the data plane and the control plane of the BUM traffic forwarding method.
  • the embodiment of the invention provides a method for implementing virtualized network overlay, which is applied to a network virtualization edge node of a virtualized data center, and includes:
  • the virtual network identifier is advertised by a routing protocol.
  • the advertising the virtual network identifier includes:
  • the above method also has the following features:
  • the routing protocol includes any of the following: an intermediate system to an intermediate system protocol, an open shortest path first protocol, and a border gateway protocol.
  • the above method also has the following features:
  • the routing protocol supports an IPv4 network protocol and an IPv6 network protocol.
  • the above method also has the following features:
  • the virtual network identifier includes a network identifier of a virtual scalable local area network.
  • the embodiment of the invention further provides a network virtualization edge node, which comprises:
  • Obtaining a module configured to obtain a virtual network identifier of the connected virtual network
  • the notification module is configured to advertise the virtual network identifier by using a routing protocol.
  • the network virtualization edge node further has the following features:
  • the notification module is configured to: notify a valid virtual network identifier; and/or notify the revoked virtual network identifier, wherein the routing protocol includes any one of the following: an intermediate system to an intermediate system protocol, an open shortest path priority Protocol, border gateway protocol, the routing protocol supports an IPv4 network protocol and an IPv6 network protocol, and the virtual network identifier includes a network identifier of a virtual scalable local area network.
  • the routing protocol includes any one of the following: an intermediate system to an intermediate system protocol, an open shortest path priority Protocol, border gateway protocol, the routing protocol supports an IPv4 network protocol and an IPv6 network protocol, and the virtual network identifier includes a network identifier of a virtual scalable local area network.
  • the embodiment of the present invention further provides a method for implementing virtualized network overlay, which is applied to a network virtualization edge node of a virtualized data center, including:
  • the above method also has the following features:
  • the advertisement message includes: an advertisement message carrying a valid virtual network identifier and/or carrying the revoked virtual network identifier.
  • the foregoing method further includes:
  • the virtual network identifier of the tenant is searched, the corresponding virtual network packet header is encapsulated, and the bit string corresponding to the virtual network identifier is searched, and the bit is encapsulated.
  • the bit index corresponding to the bit string displays a copy (BIER) header, which is forwarded according to the bit index forwarding table.
  • the embodiment of the invention further provides a network virtualization edge node, which comprises:
  • a receiving module configured to receive an advertisement packet carrying a virtual network identifier
  • the processing module is configured to parse the virtual network identifier, and establish or update a mapping relationship between the corresponding virtual network identifier and the bit string of the node that sends the same virtual network identifier according to the virtual network identifier.
  • the network virtualization edge node further has the following features:
  • the advertisement message received by the receiving module includes: an advertisement message carrying a valid virtual network identifier and/or an advertisement message carrying a revoked virtual network identifier.
  • the network virtualization edge node further has the following features:
  • the receiving module is further configured to receive a broadcast, unknown, and multicast BUM traffic of the tenant;
  • the processing module is further configured to search for a virtual network identifier to which the tenant belongs, encapsulate a corresponding virtual network packet header, and search for a bit string corresponding to the virtual network identifier, and encapsulate the bit corresponding to the bit string.
  • the index displays the copy header and forwards it according to the bit index forwarding table.
  • the embodiment of the present invention further provides a computer readable storage medium storing computer executable instructions, and when the computer executable instructions are executed, implementing the foregoing method for implementing virtualized network overlay on the transmitting side.
  • the embodiment of the present invention further provides a computer readable storage medium storing computer executable instructions, and when the computer executable instructions are executed, implementing the foregoing method for implementing virtualized network overlay on the receiving side.
  • the embodiments of the present invention provide a method for implementing virtualized network overlay and an NVE node, so as to alleviate the burden on the data plane and the control plane of the current data center for the BUM traffic forwarding method.
  • Figure 1 is a schematic diagram of a related BIER technology architecture
  • FIG. 2 is a schematic diagram of a related art IS-IS protocol extension implementing a BIER control plane
  • FIG. 3 is a schematic diagram of a related art OSPF protocol extension implementing a BIER control plane
  • FIG. 5 is a schematic diagram of a VXLAN packet header structure of the related art
  • FIG. 6 is a schematic diagram of a packet structure forwarded on a tunnel after NVE encapsulation in the related art
  • FIG. 7 is a schematic diagram of a related art NVO3 technical architecture (BUM scenario).
  • FIG. 8 is a flowchart of a method for implementing virtualized network overlay on a transmitting side according to an embodiment of the present invention
  • FIG. 9 is a schematic diagram of an NVE node on a transmitting side according to an embodiment of the present invention.
  • FIG. 10 is a flowchart of a method for implementing virtualized network overlay on a receiving side according to an embodiment of the present invention
  • FIG. 11 is a schematic diagram of an NVE node on a receiving side according to an embodiment of the present invention.
  • FIG. 12 is a schematic diagram of extending a virtual network identifier based on an IS-IS protocol according to an embodiment of the present invention.
  • FIG. 13 is a schematic diagram of an application scenario according to an embodiment of the present invention.
  • the BIER technology can be introduced into the virtualized network overlay NVO3, the data plane forwarding technology for realizing data center BUM traffic, and at the same time, the IGP-BIER and BGP-BIER are introduced on the control plane.
  • Extension used by the source NVE to discover the control plane technology of NVEs that belong to the same VXLAN.
  • the embodiment of the present invention attempts to introduce a BIER technology in the virtualized data center network to implement an optimal implementation of BUM traffic forwarding in a virtualized network.
  • FIG. 8 is a flowchart of a method for implementing virtualized network overlay on a transmitting side according to an embodiment of the present invention. As shown in FIG. 8 , the method in this embodiment is applied to an NVE node in a virtualized data center, and includes the following steps:
  • Step 11 Obtain a virtual network identifier (VNI, Virtual Network Identifier) of the connected virtual network.
  • VNI virtual network identifier
  • Step 12 advertise the VNI through a routing protocol.
  • the notifying the VNI includes: notifying a valid VNI; and/or notifying the revoked VNI.
  • the routing protocol includes any one of the following: an IS-IS protocol, an OSPF protocol, and a BGP (Border Gateway Protocol); the routing protocol supports an Internet Protocol version 4 (IPv4) network protocol and an Internet protocol. Sixth Edition (IPv6) network protocol.
  • IPv4 Internet Protocol version 4
  • IPv6 Sixth Edition
  • the VNI includes a network identifier of the VXLAN.
  • FIG. 9 is a schematic diagram of an NVE node on a transmitting side according to an embodiment of the present invention.
  • the NVE node in this embodiment may include:
  • a notification module configured to advertise the VNI through a routing protocol.
  • the notification module is configured to: announce a valid VNI; and/or, advertise the revoked VNI.
  • the routing protocol includes any one of the following: an IS-IS protocol, an OSPF protocol, and a BGP protocol; the routing protocol supports an IPv4 network protocol and an IPv6 network protocol; and the virtual network identifier includes a network identifier of the VXLAN.
  • FIG. 10 is a flowchart of a method for implementing virtualized network overlay on a receiving side according to an embodiment of the present invention. As shown in FIG. 10, the method in this embodiment is applied to an NVE node in a virtualized data center, and includes the following steps:
  • Step 21 Receive an advertisement message carrying a VNI.
  • Step 22 Parse the VNI, and establish or update a mapping relationship between the corresponding VNI and the bit string of the node transmitting the same VNI according to the VNI.
  • the advertisement message includes: an advertisement message carrying a valid virtual network identifier and/or carrying the revoked virtual network identifier.
  • the VNI of the tenant When the BUM traffic of the tenant is received, the VNI of the tenant is searched, and the corresponding virtual network packet header is encapsulated, and the bit string corresponding to the VNI is searched, and the bit index corresponding to the bit string is encapsulated and displayed.
  • the (BIER) header is forwarded according to the Bit Index Indexing Table (BIFT).
  • FIG. 11 is a schematic diagram of an NVE node on a receiving side according to an embodiment of the present invention. As shown in FIG. 11, the NVE node in this embodiment may include:
  • a receiving module configured to receive an advertisement message carrying a VNI
  • the processing module is configured to parse the VNI, and establish or update a mapping relationship between the corresponding VNI and the bit string of the node transmitting the same VNI according to the VNI.
  • the advertisement message that is received by the receiving module includes: an advertisement message carrying a valid virtual network identifier and/or an advertisement message carrying the revoked virtual network identifier.
  • the receiving module may be further configured to receive a BUM traffic of the tenant
  • the processing module may be further configured to search for a VNI to which the tenant belongs, encapsulate a corresponding virtual network packet header, search for a bit string corresponding to the VNI, and encapsulate a bit bit index corresponding to the bit string.
  • the copy header is forwarded according to the bit index forwarding table.
  • the Extended IP reachability TLV (Type ⁇ Lenght ⁇ Value, type of IS-IS protocol) is extended. ⁇ length ⁇ value)) (TLV type 135) and Multi-Topology Reachable IPv4 Prefixes TLV (multi-topology reachable IPv4 prefix TLV) (TLV type 235) extended; and for IPv6 (sixth edition of Internet Protocol)
  • the network is extended under IS-IS IPv6 Regression TLV (TLV type 236) and Multi-Topology Reachable IPv6 Prefixes TLV (TLV type 237).
  • the specific extended format is shown in Figure 2.
  • the embodiment of the present invention attempts to apply the BIER technology to the control plane of the virtualized data center, and thus further defines a new sub-sub-TLV (sub-sub-invention) in the IS-IS extension defined in FIG. 2 above.
  • TLV used to advertise the virtual network identity of the virtual network.
  • the packet reference format for extending the virtual network identifier based on the IS-IS protocol is as shown in FIG. 12 .
  • the Type identifies the type of the sub-sub-TLV, and the embodiment of the present invention is used to identify the virtual network sub-sub-TLV; the Length identifies the length of the Value part of the sub-sub-TLV; the Virtual Network Identifier is the virtual network identifier. 24-bit, uniquely identifies the virtual network.
  • the OSPF protocol extension implements the BIER control plane, and extends the IPv4 network under the Extended Prefix TLV (Extended Prefix TLV) of the OSPFv2 protocol; and for the IPv6 network, the Extended LSA TLV (Extended Link State Advertisement TLV) in OSPFv3
  • TLV Extended Prefix TLV
  • the Extended LSA TLV Extended Link State Advertisement TLV
  • the embodiment of the present invention attempts to apply the BIER technology to the control plane of the virtualized data center, and further defines a new sub-sub-TLV for advertising the virtual network of the virtual network in the OSPF and OSPFv3 extensions defined in FIG. 3 above.
  • logo The packet reference format for carrying the virtual network identifier based on the OSPF and OSPFv3 protocols is also shown in FIG.
  • the Type identifies the type of the sub-sub-TLV, and the embodiment of the present invention is used to identify the virtual network sub-sub-TLV; the Length identifies the length of the Value part of the sub-sub-TLV; the Virtual Network Identifier is the virtual network identifier. 24-bit, uniquely identifies the virtual network.
  • the embodiment of the present invention attempts to apply the BIER technology to the control plane of the virtualized data center, and further expands a new sub-TLV for advertising the virtual network identifier by referring to the BGP BIER attribute of the BGP protocol; or in the BGP protocol.
  • the network layer reachable information (NLRI) is extended to advertise the virtual network identifier.
  • the OSPF protocol can support the establishment of an OSPF virtual link on the BFIR and BFER devices in the BIER domain.
  • the extended TLV information mentioned in the embodiment of the present invention is directly sent to the edge device of the BIER domain through the virtual link, and the BFIR and the BFER device directly interact with each other.
  • the connected VNI information reduces the information storage of the intermediate nodes in the BIER domain.
  • the advertised format is still based on the OSPF protocol extension.
  • the packet reference format carrying the virtual network identifier is also shown in FIG.
  • the Type identifies the type of the sub-sub-TLV, and the embodiment of the present invention is used to identify the virtual network sub-sub-TLV; the Length identifies the length of the Value part of the sub-sub-TLV; the Virtual Network Identifier is the virtual network identifier. 24-bit, uniquely identifies the virtual network.
  • the NGPs (NVE1/NVE2/NVE3) run the IGP or BGP protocol.
  • the VM1 that belongs to the tenant A (VXLAN ID 10) is connected to the NVE1.
  • the BFRID of the NVE1 is 1, and the corresponding BitString is 001.
  • VM3 belonging to tenant A (VXLAN ID 10) is connected to NVE2, BVEID of NVE2 is 2, and BitString is 010;
  • VM5 belonging to tenant A (VXLAN ID 10) is connected to NVE3, and BFRID of NVE3 is 3, corresponding to The BitString is 100.
  • NVE1/NVE2/NVE3 carries BIER information and VXLAN information through IGP protocol extension or BGP protocol extension.
  • the VXLAN information can be directly notified by the IGP format extended in Embodiment 1 or Embodiment 2.
  • NVE2 advertises BIER information and VXLAN information. After NVE1 is received, VXLAN information and BitString mapping relationship are established locally [VXLAN 10:010]. Similarly, NVE3 advertises BIER information and VXLAN information, and NVE1 also receives local mapping after receiving it. For [VXLAN 10:110].
  • the NVE1 receives the tenant multicast traffic from the VM1, it searches for the multicast traffic belonging to the VXLAN 10, encapsulates the VXLAN packet header, and further searches for the BitString corresponding to the remote NVEs belonging to the VXLAN to be 110, so that the packet is further encapsulated.
  • the BIER header is forwarded to forward multicast packets.
  • Method 1 The NVEs advertise the VXLAN information by using the extended IGP format in the first embodiment and the second embodiment. If the intermediate node receives the VXLAN information and does not recognize the information, the IGP advertisement message may be forwarded according to the IGP rule.
  • Method 2 The NVEs implement the BGP neighbor relationship or the OSPF virtual link between the NVEs through the implementation of the third embodiment or the fourth embodiment, and directly notify the VXLAN information between the NVEs, and the intermediate node does not need to be processed.
  • NVE2 advertises BIER information and VXLAN information. Regardless of method 1 or method 2, after NVE1 is received, the mapping relationship between VXLAN information and BitString is established locally [VXLAN 10:010]. Similarly, NVE3 advertises BIER information and VXLAN information. Regardless of Method 1 or Method 2, after NVE1 is received, the local map is updated to [VXLAN 10:110].
  • the NVE1 receives the tenant multicast traffic from the VM1, it searches for the multicast traffic belonging to the VXLAN 10, encapsulates the VXLAN packet header, and further searches for the BitString corresponding to the remote NVEs belonging to the VXLAN to be 110, so that the packet is further encapsulated.
  • the BIER header is forwarded to forward multicast packets.
  • the forwarding plane update is caused by the virtual machine migration.
  • the virtual machine VM5 when the virtual machine VM5 is migrated and migrated from the affiliated VNI A to the VNI B, the node NVE3 connected to the VM5 discovers the user belonging to the VXLAN 10. After the migration, the VXLAN information is revoked through the IGP protocol or the BGP protocol.
  • the VXLAN information can be revoked directly by the IGP format extended in the first embodiment and the second embodiment; for example, the NVE3 advertisement revokes the VXLAN information, and after the NVE1 is received, the original saved VXLAN information and the BitString are locally updated.
  • the mapping relationship is updated from [VXLAN 10:110] to [VXLAN 10:010].
  • NVE1 receives the subsequent tenant multicast traffic from VM1, it still searches for the multicast traffic belonging to VXLAN 10, encapsulates the VXLAN packet header, and further searches for the BitString corresponding to the remote NVEs belonging to the VXLAN.
  • the update is 010, so the updated BIER header is further encapsulated and the multicast packet is forwarded.
  • Method 1 NVE3 revokes the VXLAN information by using the extended IGP format in the first embodiment and the second embodiment. If the intermediate node receives the revoked VXLAN information and does not recognize the information, the IGP advertisement message is forwarded according to the IGP rule.
  • NVE3 establishes a BGP neighbor relationship or an OSPF virtual link between NVE1 and NVE3 through the implementation in the third embodiment or the fourth embodiment, and directly advertises the revocation between NVE1 and NVE3. VXLAN information. Intermediate nodes do not need to be processed.
  • NVE1 updates the local mapping to [VXLAN 10:010].
  • NVE1 receives the subsequent tenant multicast traffic from VM1, it still searches for the multicast traffic belonging to VXLAN 10, encapsulates the VXLAN packet header, and further searches for the BitString update corresponding to the remote NVEs belonging to the VXLAN. Therefore, the updated BIER header is further encapsulated to forward the multicast packet.
  • the embodiment of the present invention further provides a computer readable storage medium storing computer executable instructions, and when the computer executable instructions are executed, implementing the foregoing method for implementing virtualized network overlay on the transmitting side.
  • the embodiment of the present invention further provides a computer readable storage medium storing computer executable instructions, and when the computer executable instructions are executed, implementing the foregoing method for implementing virtualized network overlay on the receiving side.
  • each module/unit in the above embodiment may be implemented in the form of hardware, for example, by implementing an integrated circuit to implement its corresponding function, or may be implemented in the form of a software function module, for example, executing a program stored in the memory by a processor. / instruction to achieve its corresponding function.
  • This application is not limited to any specific combination of hardware and software.
  • the embodiment of the present application provides a method for implementing virtualized network overlay and an NVE node, which can reduce the burden on the data plane and the control plane of the current data center for the BUM traffic forwarding method.

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Abstract

L'invention concerne un procédé de mise en oeuvre de recouvrement de réseau de virtualisation, consistant à acquérir un identifiant de réseau virtuel (VNI) connecté ; et à notifier l'identifiant de réseau virtuel par l'intermédiaire d'un protocole de routage. La solution permet de réduire la charge d'un centre de données actuel sur un plan de données et sur un plan de commande pour un procédé d'acheminement de trafic BUM. \
PCT/CN2016/087112 2015-10-09 2016-06-24 Procédé de mise en oeuvre de recouvrement de réseau de virtualisation, et noeud de bord de virtualisation de réseau WO2016198022A1 (fr)

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CN201510647010.9A CN106572021B (zh) 2015-10-09 2015-10-09 一种实现网络虚拟化叠加的方法与网络虚拟化边缘节点
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