WO2018188425A1

WO2018188425A1 - Vxlan single-homing and dual-homing hybrid access method and apparatus, pe device and storage medium

Info

Publication number: WO2018188425A1
Application number: PCT/CN2018/077796
Authority: WO
Inventors: 唐益慰
Original assignee: 中兴通讯股份有限公司
Priority date: 2017-04-12
Filing date: 2018-03-01
Publication date: 2018-10-18
Also published as: CN108696416A

Abstract

Disclosed are a VXLAN single-homing and dual-homing hybrid access method and apparatus, a PE device and a storage medium. The method comprises: executing single-homing and dual-homing hybrid access configuration, comprising configuring a Multi-chassis Link Aggregation Group (MC-LAG) interface and configuring a PeerLink interface corresponding to the MC-LAG; configuring an Ethernet segment identification (ESI) of the MC-LAG interface and a designated forwarder (DF) election rule; binding the MC-LAG interface, the PeerLink interface, and other single-homing and dual-homing interfaces to a VXLAN domain; and in a single-homing and dual-homing hybrid access scenario, load sharing and forwarding a unicast message and broadcasting a received BUM message in the VXLAN domain according to a preset filtration forwarding rule.

Description

VXLAN single-homing and dual-homing hybrid access method, device, PE device and storage medium

Cross-reference to related applications

The present application is based on a Chinese patent application filed on Jan. 12, 2017, the entire disclosure of which is hereby incorporated by reference.

Technical field

The present disclosure relates to the field of cloud computing and data center technologies, and in particular, to a VXLAN (Virtual Extensible LAN) single-homing and dual-homing hybrid access method, device, PE (Provider Edge, Carrier Edge) device and storage. medium.

Background technique

At present, VXLAN EVPN (Ethernet Virtual Private Network) technology is the main technology used for data center two-layer interconnection. In the RFC7432 standard of IETF (The Internet Engineering Task Force), There are corresponding descriptions for the scenario where the CE (Customer Edge) device is connected to the PE device.

For ease of understanding, a typical networking diagram of VXLAN single-homed and dual-homed hybrid access shown in FIG. 1 is illustrated. In FIG. 1, TS1 is dual-homed to DUT1 and DUT2, PC1 is directly connected to DUT1, and PC2 is single-homed. Access to DUT2, TS2 is directly connected to DUT3; AC1 to AC5 are physical links.

For the CE (TS1) dual-homed access PE (DUT1 and DUT2), the PE needs to configure the MC-LAG (Multi-Chassis Link Aggregation Group) for the physical link between the CE and the PE. The corresponding ESI (Ethernet Segment Identifier) and the corresponding multi-active/single-active switch are configured. The ESI of the MC-LAG needs to be configured to be consistent with the PE connected to the same CE. For example, connect to TS1. The MCs of the DUT1 and the DUT2 need to be configured with the same ESI. For each PE device that is configured with the same ESI for the MC-LAG, the ERP must be negotiated with the RT (Router Type)-4, and the DF (Designated Forwarder) is elected. , the forwarding device is configured to filter the excess BUM (Broadcast & Unknown & Unicast & Multicast, Broadcast & Unknown Unicast & Multicast) traffic, where the BUM message is a multicast message, and only the DF device can receive the multicast message, and the Non-DF The device does not receive multicast messages. When transmitting the routing information of the RT-1 and RT-4 types, the PE device needs to carry the configured ESI to form a multi-active/single-lived redundant route on the remote PE device.

In the related art, for unicast packet forwarding, the protocol specified scheme can well support existing scenarios. However, for multicast message forwarding, there are certain problems with the protocol specified by the protocol. As shown in Figure 2, the BUM packet is sent to the Non-BOM packet. - DF PE device, the non-DF PE device broadcasts the packet to the network side. After receiving the traffic, the DF PE device cannot determine the ESI of the BUM packet source. Therefore, the DF PE device sends the BUM packet to the original CE. , causing the BUM message to loop back.

For the loopback problem of the BUM packets, you can set the BUM packets to be sent between the dual-homed PEs. The BUM traffic received by the PE device from the CE side will not be sent to the ESI neighbor. This solves the BUM packet loopback problem. However, other problems are caused, that is, in the scenario of dual-homing and single-homing configuration, the single-homed node cannot receive BUM packets, as shown in Figure 3.

Summary of the invention

Embodiments of the present disclosure provide a VXLAN single-homing and dual-homing hybrid access method, apparatus, PE device, and storage medium.

The embodiments of the present disclosure are solved by the following technical solutions:

An embodiment of the present disclosure provides a VXLAN single-homing and dual-homing hybrid access method, which is performed on a PE device, including: performing a single dual-homing hybrid access configuration; wherein, configuring an MC-LAG, and configuring the MC-LAG corresponding to the MC-LAG Configuring an ESI of the same as the MC-LAG corresponding to the peer PE device in the MC-LAG interface; and binding the MC-LAG interface, the PeerLink interface, and the single-homed interface to the VXLAN domain; In a single-and-double-homed hybrid access scenario, load balancing forwards unicast packets and broadcasts received BUM packets in the VXLAN domain according to a preset filtering and forwarding rule.

The method further includes: prohibiting a PE device that is the same as the ESI of the MC-LAG from being a BGP (Border Gateway Protocol) EVPN (Ethernet Virtualization) a private network) neighbor; determining a DF state of the ESI of the MC-LAG according to the active/standby state of the MC-LAG.

According to the preset filtering and forwarding rule, in the VXLAN domain, the load sharing forwards the unicast packet and broadcasts the received BUM packet, including: if receiving from the MC-LAG interface and the single-homed interface And the unicast packet is forwarded according to the forwarding table entry; if the BUM packet is received from the MC-LAG interface and the single-homed interface, the broadcast is directly in the VXLAN domain. The BUM message is sent; if the BUM message is received from the PeerLink interface, the BUM message is prohibited from being broadcast to the MC-LAG interface and the VXLAN EVPN network side in the VXLAN domain, only to the single The interface broadcasts the BUM message; if the BUM message is received from the VXLAN EVPN network, the BUM message is prohibited from being broadcast to the PeerLink interface in the VXLAN domain, and only the single-homed interface is The MC-LAG interface that meets the preset condition broadcasts the BUM message; the preset condition is that the DF state of the ESI configured on the MC-LAG interface is DF.

The method further includes: if the peer PE device is faulty, updating the active/standby state of the MC-LAG corresponding to the local PE device, and re-determining the current and standby states according to the updated MC-LAG status. The DF state of the ESI of the MC-LAG corresponding to the PE device; if the BGP device detects that the BGP EVPN neighbor device is faulty, the corresponding forwarding table entry transmitted by the BGP EVPN neighbor device is deleted; if the MC of the local PE device If the LAG interface is faulty, the forwarding table entry corresponding to the MC-LAG interface is deleted, and the BGP device is notified to the BGP EVPN neighboring device to delete the remote entry; if the MC-LAG interface of the local PE device is faulty. And updating the active/standby state of the MC-LAG corresponding to the local PE device, and re-determining the DF state of the ESI of the MC-LAG corresponding to the local PE device according to the updated active/standby state of the MC-LAG; If the PeerLink interface of the end PE device is faulty, and the DF state of the ESI of the MC-LAG corresponding to the PeerLink interface is Non-DF, all MC-LAG interfaces are closed.

In the VXLAN domain, the load balancing forwards the unicast packet and broadcasts the received BUM packet according to the preset filtering and forwarding rule, including: when receiving the unknown unicast packet, determining whether the VXLAN domain is The broadcast function in the unknown packet domain is enabled. If the broadcast function in the unknown packet domain is enabled, the unknown unicast packet is broadcasted in the VXLAN domain according to the preset filter forwarding rule. Otherwise, the unknown ticket is discarded. Broadcast message.

The embodiment of the present disclosure provides a VXLAN single-homing and dual-homing hybrid access device, which is executed by a PE device, and includes: a configuration module configured to perform a single dual-homing hybrid access configuration; wherein, the MC-LAG is configured, and the configuration An ESI corresponding to the MC-LAG corresponding to the MC-LAG; the MC-LAG is configured with the same ESI as the MC-LAG corresponding to the peer PE device; and the binding module is configured to connect the MC-LAG interface and the The PeerLink interface and the single-homed interface are bound to the VXLAN domain. The forwarding module is configured to load and forward unicast packets in the VXLAN domain and broadcast and receive in the VXLAN domain according to the preset filtering and forwarding rules. BUM message to.

The configuration module is further configured to: when the performing the single dual-homing hybrid access configuration, prohibit the PE device that is the same as the ESI of the MC-LAG from becoming a BGP EVPN neighbor; according to the MC-LAG In the standby state, the DF state of the ESI of the MC-LAG is determined.

The forwarding module is configured to: if the unicast packet is received from the MC-LAG interface and the single-homed interface, forward the unicast packet according to a forwarding table entry; if from the MC- Receiving, by the LAG interface and the single-homed interface, the BUM message, directly broadcasting the BUM message in the VXLAN domain; if receiving the BUM message from the PeerLink interface, in the VXLAN domain Disabling the broadcast of the BUM message to the MC-LAG interface and the VXLAN EVPN network side, and only broadcasting the BUM message to the single-homed interface; if receiving the BUM message from the VXLAN EVPN network side, Disabling the broadcast of the BUM message to the PeerLink interface in the VXLAN domain, and only broadcasting the BUM message to the single-homed interface and the MC-LAG interface that meets the preset condition; the preset condition is: The DF state of the ESI of the MC-LAG interface configuration is DF.

The device further includes a processing module, and the processing module is configured to: if the peer PE device is faulty, update the active/standby state of the MC-LAG corresponding to the local PE device, and according to the updated If the BGP EVPN neighbor device is faulty, the BGP EVPN neighbor device sends the corresponding forwarding table entry. If the MC-LAG interface of the local PE device is faulty, delete the forwarding table entry corresponding to the MC-LAG interface, and notify the BGP device to delete the remote entry of the BGP EVPN neighbor device; If the MC-LAG interface of the PE device is faulty, the status of the MC-LAG corresponding to the local PE device is updated, and the MC corresponding to the local PE device is re-determined according to the updated active/standby status of the MC-LAG. The DF state of the ESI of the LAG; if the PeerLink interface of the local PE device fails, and the DF state of the ESI of the MC-LAG corresponding to the PeerLink interface is Non-DF, all MC-LAG interfaces are closed.

The forwarding module is further configured to: determine, when the unknown unicast packet is received, whether the VXLAN domain has enabled the broadcast function in the unknown packet domain; if the broadcast function in the unknown packet domain has been enabled, The filtering and forwarding rule is configured to broadcast the unknown unicast packet in the VXLAN domain; otherwise, the unknown unicast packet is discarded.

Embodiments of the present disclosure also provide a PE device including a processor that performs data processing, a memory configured as data storage, and a data transceiver for data transmission and/or reception, wherein the processor When performing the data stored in the memory, performing the following operations: performing a single dual-homing hybrid access configuration; wherein, configuring an MC-LAG, and configuring a PeerLink interface corresponding to the MC-LAG; The MC-LAG is configured with the same ESI as the MC-LAG corresponding to the peer PE device; the MC-LAG interface, the PeerLink interface, and the single-homed interface are bound to the VXLAN domain; The preset filtering and forwarding rule is to load and forward the unicast packet and broadcast the received BUM packet in the VXLAN domain.

When the processor executes the data stored in the memory, the following operations are also performed: when the single-double-homing access configuration is performed, the PE device that is the same as the ESI of the MC-LAG is prohibited from being a BGP EVPN. a neighbor; determining a DF state of the ESI of the MC-LAG according to the active/standby state of the MC-LAG.

Wherein, when the processor executes the data stored in the memory, the following operations are also performed:

If the fault of the peer PE device is detected, the active/standby state of the MC-LAG corresponding to the local PE device is updated, and the MC-LAG corresponding to the local PE device is re-determined according to the updated active/standby state of the MC-LAG. If the BGP EVPN neighbor device fails to be detected by the BGP device, delete the corresponding forwarding table entry delivered by the BGP EVPN neighbor device; if the MC-LAG interface of the local PE device fails, delete the The forwarding table entry corresponding to the MC-LAG interface is sent, and the BGP device is notified to the BGP EVPN neighboring device to delete the remote entry. If the MC-LAG interface of the local PE device is faulty, the local PE device is updated. The active/standby state of the MC-LAG, and the DF state of the ESI of the MC-LAG corresponding to the local PE device is re-determined according to the updated active/standby state of the MC-LAG; if the PeerLink interface of the local PE device If the DF status of the ESI of the MC-LAG corresponding to the PeerLink interface is Non-DF, all MC-LAG interfaces are closed.

Embodiments of the present disclosure provide a computer storage medium having stored thereon a computer program that, when executed by a processor, implements the steps of any of the above methods.

The beneficial effects of the embodiments of the present disclosure are as follows:

The present disclosure combines the ESI technology and the MC-LAG Peerlink technology, and sets the filtering and forwarding rules on the basis of the disclosure, thereby supporting the dual-homing load sharing transmission, and solving the problem that the BUM packet loopback and/or the BUM packet cannot be received. The problem is that the embodiment of the present disclosure can support the application scenario of single-homing and dual-homing hybrid access.

DRAWINGS

1 is a networking diagram of VXLAN single-homing and dual-homing hybrid access in the related art;

2 is a schematic diagram of a BUM message loopback in the related art;

3 is a schematic diagram of not transmitting a BUM message between ESI members in the related art;

4 is a flowchart of a VXLAN single-homing and dual-homing hybrid access method according to a first embodiment of the present disclosure;

5 is a flow chart showing the steps of performing a single dual-homed hybrid access configuration in accordance with a second embodiment of the present disclosure;

6 is a schematic diagram of a VXLAN single-homing and dual-homing hybrid access network according to a second embodiment of the present disclosure;

FIG. 7 is a flowchart of a step of forwarding a BUM message on a CE side according to a third embodiment of the present disclosure;

FIG. 8 is a schematic diagram of a network for forwarding a BUM message on a CE side according to a third embodiment of the present disclosure;

9 is a flowchart of steps of forwarding a PeerLink BUM message according to a third embodiment of the present disclosure;

FIG. 10 is a schematic diagram of a network for forwarding a PeerLink BUM message according to a third embodiment of the present disclosure; FIG.

11 is a flowchart of steps of forwarding a network side BUM message according to a third embodiment of the present disclosure;

FIG. 12 is a schematic diagram of a network for forwarding a network side BUM message according to a third embodiment of the present disclosure; FIG.

FIG. 13 is a schematic diagram of a PeerLink interface failure according to a fourth embodiment of the present disclosure; FIG.

14 is a schematic diagram of a PeerLink interface failure according to a fourth embodiment of the present disclosure;

15 is a schematic diagram of an MC-LAC interface failure according to a fourth embodiment of the present disclosure;

16 is a schematic diagram of an MC-LAC interface failure according to a fourth embodiment of the present disclosure;

17 is a schematic diagram of a PE device failure according to a fourth embodiment of the present disclosure;

18 is a structural diagram of a VXLAN single-homing and dual-homing hybrid access device according to a fifth embodiment of the present disclosure;

19 is a schematic diagram showing the hardware structure of a PE device according to a sixth embodiment of the present disclosure.

detailed description

The present disclosure will be further described in detail below in conjunction with the drawings and embodiments. It is understood that the specific embodiments described herein are merely illustrative of the disclosure and are not intended to be limiting.

Embodiment 1

This embodiment provides a VXLAN single-homing and dual-homing hybrid access method. The execution body of this embodiment is a PE device (that is, the local PE device described below). 4 is a flow chart of a VXLAN single-homing and dual-homing hybrid access method in accordance with a first embodiment of the present disclosure.

Step S410, performing a single dual-homing hybrid access configuration.

The dual-homing hybrid access configuration includes: configuring an MC-LAG and configuring a PeerLink interface corresponding to the MC-LAG; configuring, on the MC-LAG interface, the MC-LAG is the same as the MC-LAG corresponding to the peer PE device ESI, that is, the ESI of the MC-LAG corresponding to the local PE device is the same as the ESI of the MC-LAG corresponding to the peer PE device.

Specifically, the related parameters and rules of the MC-LAG and the PeerLink link are configured for the local PE device. Further, each PeerLink sub-interface corresponding to the MC-LAG is configured.

The ESI DF election rule of the MC-LAG may be configured for the local PE device, including: disabling the same PE device as the ESI EVPN neighbor of the MC-LAG; after configuring the ESI of the MC-LAG, according to the The active/standby state of the MC-LAG is determined, and the DF state of the ESI of the MC-LAG is determined. According to the configuration of the embodiment, the DF state is controlled by the active/standby state of the MC-LAG, and the subsequent DF state also needs to be updated according to the update of the active and standby states of the MC-LAG.

If the active-standby state of the MC-LAG is dominant, the DF state of the ESI of the MC-LAG is determined to be DF; if the active-standby state of the MC-LAG is standby, it is determined that the DF state of the ESI of the MC-LAG is Non- DF. In an embodiment, the active-standby state of the MC-LAG is determined according to the priority of the MC-LAG interface, and the MC-LAG configured by the high-priority MC-LAG interface is the primary, and the low-priority MC-LAG interface is configured. The configured MC-LAG is standby.

In step S420, the MC-LAG interface, the PeerLink interface, and the single-homed interface are bound to the VXLAN domain.

Bind the single-homed interface, the MC-LAG interface, and the PeerLink interface to the VXLAN instance. The single-homed interface, the MC-LAG interface, and the PeerLink interface are bound to the VXLAN domain. Further, to bind each PeerLink sub-interface to the VXLAN domain, the interface for connecting to the VXLAN EVPN network needs to be bound to the VXLAN domain.

Step S430: In the single-and-double-homed access scenario, load-sharing forwards the unicast packet and broadcasts the received BUM packet in the VXLAN domain according to the preset filtering and forwarding rule.

The filtering and forwarding rules include:

If the unicast packet is received from the MC-LAG interface and the single-homed interface, the unicast packet is forwarded according to the forwarding table entry;

If the BUM message is received from the MC-LAG interface and the single-homed interface, the BUM message is directly broadcasted in the VXLAN domain;

If the BUM message is received from the PeerLink interface, the BUM message is prohibited from being broadcast to the MC-LAG interface and the VXLAN EVPN network side in the VXLAN domain, and only the single-homed interface is broadcasted to the single-homed interface. BUM message;

If the BUM message is received from the VXLAN EVPN network, the BUM message is prohibited from being broadcast to the PeerLink interface in the VXLAN domain, and only the single-homed interface and the MC-LAG interface that meet the preset condition are The BUM message is broadcasted; the preset condition is that the DF state of the ESI of the MC-LAG configured on the MC-LAG interface is DF.

After the single-homed interface, the MC-LAG interface, and the PeerLink interface are bound to the VXLAN domain, the local PE device receives the unicast packet and the BUM packet, and the interface is MC-LAG. The interface and the PeerLink interface can forward packets according to the filtering and forwarding rules.

In this embodiment, when the unknown unicast packet is received, it is determined whether the VXLAN domain has opened the broadcast function in the unknown packet domain; if the broadcast function in the unknown packet domain has been enabled, the preset filtering and forwarding rule is Broadcasting the unknown unicast packet in the VXLAN domain; otherwise, discarding the unknown unicast packet.

In this embodiment, the fault processing may be performed according to a preset fault processing rule in a single-and dual-homing hybrid access scenario, including:

If the fault of the peer PE device is detected, the active/standby state of the MC-LAG corresponding to the local PE device is updated, and the MC-LAG corresponding to the local PE device is re-determined according to the updated active/standby state of the MC-LAG. DF state of ESI;

If the BGP EVPN neighbor device is faulty, the BGP EVPN neighbor device sends the corresponding forwarding table entry.

If the MC-LAG interface of the local PE device is faulty, the forwarding table entry corresponding to the MC-LAG interface is deleted, and the BGP device is notified to enable the BGP EVPN neighboring device to delete the remote entry.

If the MC-LAG interface of the local PE device is faulty, the active/standby state of the MC-LAG corresponding to the local PE device is updated, and the local PE device is re-determined according to the updated active/standby state of the MC-LAG. The DF state of the ESI of the corresponding MC-LAG;

If the PeerLink interface of the local PE device fails, and the DF state of the ESI of the MC-LAG corresponding to the PeerLink interface is Non-DF, all MC-LAG interfaces are closed.

This embodiment combines the ESI technology and the MC-LAG Peerlink technology, and sets the filtering and forwarding rules on the basis of this. In the case that the VXLAN packet does not have an ESI label, the BUM packet loopback and the BUM packet do not occur. The problem that cannot be received, so this embodiment can support the application scenario of single-homing and dual-homing hybrid access.

Embodiment 2

The above steps of performing a single dual-homed hybrid access configuration are further described below.

5 is a flow chart showing steps of performing a single dual-homing hybrid access configuration according to a second embodiment of the present disclosure; and FIG. 6 is a schematic diagram of a VXLAN single-homing and dual-homing hybrid access network according to a second embodiment of the present disclosure. In Figure 6, TS1, PC1, PC2, and TS2 are CE devices, DUT1, DUT2, and DUT3 are PE devices; TS1 is dual-homed to DUT1 and DUT2, PC1 is directly connected to DUT1, PC2 is directly connected to DUT2, and TS2 is single. Go to DUT3.

Step S510, the MC-LAG and the ESI DF election rule are configured for the local PE device.

After the CE device is connected to the local device, the MC-LAG, the ESI DF election rule, and the load balancing mode are configured on the MC-LAG interface of the local PE.

An MC-LAC member link can be established between the local PE device, the CE device, and the peer PE device. The local PE device is connected to the peer CE device.

On the SG (Smart Bundle Interface) interface of the local PE device, you can configure the ESI of the MC-LAG. The PEs connected to the same CE device are configured with the same ESI. In other words, the interface on the access side of the PE device needs to be configured with the same ESI, and the interface on the access side of the PE device does not need to be configured with ESI.

It is forbidden to configure the BGP EVPN neighbor relationship between the local PE device and the MC-LAG with the same ESI. That is, the BGP EVPN neighbor relationship is disabled between the dual-homing nodes. This prevents BUM packets from returning.

The local EI is not allowed to perform the ESI DF election between the PEs with the same ESI as the MC-LAG. The LSP flag of the MC-LAG is set according to the active/standby status of the MC-LAC corresponding to the local PE. DF or Non DF). The DF flag is used to embody the DF state of ESI.

As shown in Figure 6, the MC-LAG is configured on the MC-LAG interface of the DUT1 and the DUT2, and the MC-LAC is set up between the DUT1 (the local PE device), the TS1 (the CE device), and the DUT2 (the peer PE device). The member links AC1 and AC2; the ESIs of the MC-LAGs corresponding to the DUT1 and the DUT2 are the same; the DUT1 and the DUT2 are prohibited from being the BGP EVPN neighbors; and the DF states of the respective ESIs are determined according to the active and standby states of the MC-LAGs corresponding to the DUT1 and the DUT2, respectively. In FIG. 6, the MC-LAG corresponding to DUT1 is master (main), the DF of the MC-LAG is marked as DF, the MC-LAG corresponding to DUT2 is backup, and the DF mark of the ESI of the MC-LAG For Non DF.

Step S520: Configure a PeerLink link on the PeerLink interface of the local PE device.

The PeerLink link is used to interconnect the local PE device and the peer PE device, as shown in Figure 6.

Further, the PeerLink interface of the local PE device is configured, and the sub-interface of the PeerLink interface is configured to implement the configuration of the PeerLink link.

Step S530: Establish a BGP EVPN neighbor with the remote device by using different local IP address (Internet Protocol Address) addresses of the local PE device, and send the ESI configured for the MC-LAG to the BGP EVPN neighbor device so as to be located far away. The BGP EVPN neighbor device can establish a corresponding VXLAN EVPN route.

As shown in Figure 6, DUT1 can establish a BGP EVPN neighbor with the remote device DUT3 using different IP addresses, so that DUT3 becomes the BGP EVPN neighbor of DUT1.

The local PE device carries the ESI of the MC-LAG corresponding to the local PE device in the RT-2 routing information. After receiving the RT-2 routing information, the BGP EVPN neighbor device can form a corresponding redundant route.

Step S540: Synchronize the active/standby status and the forwarding table of the MC-LAG corresponding to the local PE device to the peer PE device, and advertise the forwarding table to the BGP EVPN neighbor device.

The master-slave state and forwarding table of the MC-LAG corresponding to the local PE device can be synchronized to the peer PE device through the PeerLink link or the VXLAN EVPN network.

The forwarding table can be converted into a standard format defined by RFC (Request For Comments) to form a remote forwarding table and advertised to a BGP EVPN neighbor.

Step S550: Configure a filtering and forwarding rule and a fault handling rule for the local PE device.

The filtering and forwarding rules include:

The unicast forwarding mechanism: if the unicast packet is received from the MC-LAG interface and the single-homed interface, the unicast packet is forwarded according to the forwarding table entry. Further, when receiving the unicast packet from the MC-LAG interface and the single-homed interface, it is determined whether the forwarding table entry corresponding to the unicast packet exists in the forwarding table, and if yes, forwarding according to the forwarding table entry, if not If yes, the unicast packet is an unknown unicast packet. If the unknown broadcast is allowed, the packet is forwarded according to the preset filtering and forwarding rule. If the unknown broadcast is not allowed, the unknown unicast packet is discarded. Further, if the unicast packet is received from the access side, the ESI load sharing routing information (forwarding table entry) advertised by the BGP EVPN neighbor device included in the forwarding table may be used for load sharing forwarding.

Ordinary forwarding mechanism: If the BUM message is received from the MC-LAG interface and the single-homed interface, the BUM message is directly broadcasted in the VXLAN domain.

a single isolation mechanism: if the BUM message is received from the PeerLink interface, the BUM message is prohibited from being broadcast to the MC-LAG interface and the VXLAN EVPN network side in the VXLAN domain, and only the single-homed The interface broadcasts the BUM message.

The DF filtering mechanism: if the BUM message is received from the VXLAN EVPN network, the BUM message is prohibited from being broadcast to the PeerLink interface in the VXLAN domain, and only the single-homed interface and the preset condition are met. The MC-LAG interface broadcasts the BUM message; the preset condition is that the DF state of the ESI of the MC-LAG configured on the MC-LAG interface is DF.

The fault handling rules include:

If the local PE device detects that the peer PE device is faulty, the active and standby states of the MC-LAG corresponding to the local PE device are updated, and the local PE device is re-determined according to the updated active/standby state of the MC-LAG. The DF state of the ESI of the corresponding MC-LAG;

If the BGP EVPN neighbor device fails to be detected by the BGP device, the corresponding forwarding table entry transmitted by the BGP EVPN neighbor device is deleted.

If the MC-LAG interface of the local PE device is faulty, delete the forwarding entry corresponding to the MC-LAG interface, and notify the BGP device to delete the remote entry of the BGP EVPN neighboring device.

If the MC-LAG interface of the local PE device is faulty, the active/standby status of the MC-LAG corresponding to the local PE device is updated, and the corresponding PE device is re-determined according to the updated active/standby status of the MC-LAG. DF state of ESI of MC-LAG;

If the PeerLink interface of the local PE device is faulty and the DF state of the ESI of the MC-LAG corresponding to the PeerLink interface is Non-DF, all MC-LAG interfaces are closed.

This embodiment overcomes the multicast loopback problem caused by the configuration ESI specified in the RFC7432 protocol, and overcomes the problem that the ESI members do not send BUM packets and cannot support single-homed hybrid access.

This embodiment implements a redundant access scenario in a VXLAN EVPN network. By combining the MC-LAG Peerlink technology with the ESI technology, the single-homed node and the dual-homed node can be mixedly connected to the PE device to provide load sharing and protection functions.

In this embodiment, the filtering and forwarding rules are set to ensure that the loopback problem does not occur in the BUM packets. For the dual-homing node, it can achieve local-to-distal load sharing, remote-to-local load sharing, and protection against device or link failure. The single-homing and dual-homing hybrid access method in this embodiment can support the normal forwarding of unicast and multicast packets, and does not affect the standard forwarding rules of VXLAN packets from other vendors on the network side.

Embodiment 3

This embodiment further describes the use of filter forwarding rules. In this embodiment, the execution subject is DUT1.

7 is a flowchart of a procedure for forwarding a BUM message on a CE side according to a third embodiment of the present disclosure. FIG. 8 is a schematic diagram of a network for forwarding a BUM message on a CE side according to a third embodiment of the present disclosure.

Step S710, receiving traffic from the CE device side.

In step S720, it is determined whether the traffic is a BUM traffic; if yes, step S730 is performed; if not, step S740 is performed.

Step S730, if it is BUM traffic, broadcast the BUM traffic directly in the VXLAN domain.

Broadcasting the BUM traffic in the VXLAN domain includes forwarding the BUM traffic to a single-homed interface, an MC-LAG interface, a PeerLink interface, and a VXLAN EVPN network side, in addition to the interface that receives the traffic. Thus BUM traffic from TS1 will be forwarded to PC1, DUT1, PC2, DUT3 and TS2.

In step S740, if it is a unicast traffic, the forwarding table is queried to determine whether there is a forwarding entry (forwarding table entry) corresponding to the unicast traffic in the forwarding table; if yes, step S750 is performed; if no, step S730 is performed.

Step S750: If the forwarding entry corresponding to the unicast traffic is queried in the forwarding table, the unicast traffic is forwarded according to the forwarding entry.

Broadcasting the unicast traffic in the VXLAN domain includes forwarding the unicast traffic to a single-homed interface, an MC-LAG interface, a PeerLink interface, and a VXLAN EVPN network side in addition to the interface that receives the traffic. Thus BUM traffic from TS1 will be forwarded to PC1, DUT1, PC2, DUT3 and TS2.

FIG. 9 is a flow chart showing the steps of forwarding a PeerLink BUM message according to the third embodiment of the present disclosure; 10 is a network diagram for forwarding a PeerLink BUM message according to the third embodiment of the present disclosure.

Step S910, receiving traffic from the Peerlink interface.

In step S920, it is determined whether the traffic is a BUM traffic; if yes, step S930 is performed; if not, step S940 is performed.

In step S930, if it is BUM traffic, the BUM traffic is prohibited from being broadcast to the MC-LAG interface and the VXLAN EVPN network side in the VXLAN domain, and the BUM traffic is broadcast only to the single-homing interface.

In step S940, if it is a unicast traffic, the forwarding table is queried to determine whether there is a forwarding entry corresponding to the unicast traffic in the forwarding table; if yes, step S950 is performed; if no, step S930 is performed.

Step S950, forwarding the unicast traffic according to the forwarding entry.

11 is a flowchart of a step of forwarding a network side BUM message according to a third embodiment of the present disclosure. FIG. 12 is a network diagram of forwarding a network side BUM message according to a third embodiment of the present disclosure.

In step S1110, traffic from the VXLAN EVPN network side is received.

In step S1120, it is determined whether the traffic is a BUM traffic; if yes, step S1130 is performed; if not, step S1140 is performed.

In step S1130, if it is BUM traffic, it is broadcast to the single-homed access side and the dual-homing ESI DF access side in the VXLAN domain, and is not broadcast to the Peerlink side, and the ESI Non-DF access port is filtered.

Specifically, the BUM traffic is not broadcast to the PeerLink interface in the VXLAN domain, and the unicast traffic is broadcast only to the single-homed interface and the MC-LAG interface that meets the preset condition. The preset condition is: on the MC-LAG interface. The DF state of the ESI of the configured MC-LAG is DF, and the DF state of the ESI of the configured MC-LAG is filtered out to be the MC-LAG interface of the Non DF.

In step S1140, if it is a unicast traffic, the forwarding table is queried to determine whether there is a forwarding entry corresponding to the unicast traffic in the forwarding table; if yes, step S1150 is performed; if not, step S1130 is performed.

Step S1150: Forward the unicast traffic according to the forwarding entry.

In this embodiment, the load sharing and forwarding of the traffic corresponding to the CE device and the network side can be performed under normal conditions, thereby improving bandwidth utilization. In the case of a PeerLink link failure, a dual-homed node (PE device) failure, and a MC-LAG interface failure, the CE device and the network side traffic can be protected to improve the reliability of the VXLAN EVPN network.

FIG. 13 is a schematic diagram of a PeerLink interface failure according to a fourth embodiment of the present disclosure.

If the PeerLink interface fails, the DUT1 can forward the BUM message to the PC1 through the VXLAN EVPN network and forward it to the DUT3 through the VXLAN EVPN network after receiving the BUM message from the TS1.

As shown in FIG. 14, it is a schematic diagram of a PeerLink interface failure according to a fourth embodiment of the present disclosure.

If the PeerLink interface fails, the BUM packets sent by DUT3 will reach DUT1 and DUT1 through the VXLAN EVPN network. The active/standby state of the MC-LAG corresponding to the DUT1 is master, and the DF state of the ESI of the MC-LAG is DF. The active/standby state of the MC-LAG corresponding to the DTU1 is backup, and the DF state of the ESI of the MC-LAG is Non-DF. According to the procedure shown in FIG. 11, after receiving the BUM message from the VXLAN EVPN network side, the DUT1 can send the BUM message to the PC1 and the TS1, and after receiving the BUM message from the VXLAN EVPN network side, the DUT2 receives the BUM message from the VXLAN EVPN network side. The BUM message can be forwarded to PC2.

FIG. 15 is a schematic diagram of an MC-LAC interface failure according to a fourth embodiment of the present disclosure.

If the MC-LAG interface of the DUT2 fails, the DUT1 receives the BUM message from the TS1, and then forwards the BUM message to the PC1 through the AC4 and forwards it to the DUT2 through the VXLAN EVPN network according to the procedure shown in Figure 7, through the PeerLink chain. The way is forwarded to DUT2.

FIG. 16 is a schematic diagram of an MC-LAC interface failure according to a fourth embodiment of the present disclosure.

If the MC-LAG interface of the DUT2 is faulty, the DUT1 receives the BUM message from the DUT3 through the VXLAN EVPN network, and then forwards the BUM message to the PC1 through the AC4 and forwards it to the TS1 through the AC1 according to the procedure shown in FIG. After receiving the BUM message from the DUT3 through the VXLAN EVPN network, the DTU2 forwards the BUM message to the PC2 through the AC5 according to the procedure shown in FIG. 11, and the DF state of the ESI of the MC-LAG configured by the MC-LAG interface of the DUT2. It is Non DF, so DUT2 does not send BUM messages to TS1.

FIG. 17 is a schematic diagram of a failure of a PE device according to a fourth embodiment of the present disclosure.

If the DUT2 fails, the DUT1 receives the BUM message from the TS1, and forwards the BUM message to the PC1 through the AC4 and forwards it to the DUT2 through the VXLAN EVPN network according to the procedure shown in FIG.

Embodiment 5

This embodiment provides a VXLAN single-homing and dual-homing hybrid access device. 18 is a structural diagram of a VXLAN single-homing and dual-homing hybrid access device according to a fifth embodiment of the present disclosure. The VXLAN single-homing and dual-homing hybrid access device of this embodiment may be disposed on the PE device side.

The VXLAN single-homed and dual-homed hybrid access device includes:

The configuration module 1810 is configured to perform a single dual-homing hybrid access configuration, where the MC-LAG is configured, and the PeerLink interface corresponding to the MC-LAG is configured; and the MC-LAG interface is configured with the peer PE. The same ESI of the MC-LAG corresponding to the device.

The binding module 1820 is configured to bind the MC-LAG interface, the PeerLink interface, and the single-homed interface to the VXLAN domain.

The forwarding module 1830 is configured to load and forward the unicast packet and broadcast the received BUM packet in the VXLAN domain according to a preset filtering and forwarding rule.

In an embodiment, the configuration module 1810 is configured to prevent the PE device that is the same as the ESI of the MC-LAG from being a border gateway protocol BGP Ethernet virtual private network when the single-homing hybrid access configuration is performed. EVPN neighbor; determining the DF state of the ESI according to the active/standby state of the MC-LAG. In other words, in the configuration module 1810, the DF state of the configuration ESI is controlled by the active/standby state of the MC-LAG.

In an embodiment, the forwarding module 1830 is configured to:

If the BUM message is received from the VXLAN EVPN network, the BUM message is prohibited from being broadcast to the PeerLink interface in the VXLAN domain, and only the single-homed interface and the MC-LAG interface that meet the preset condition are The BUM message is broadcasted; the preset condition is that the DF state of the ESI configured on the MC-LAG interface is DF.

In an embodiment, the apparatus further includes a processing module (not shown).

The processing module is configured to:

In an embodiment, the forwarding module 1830 is configured to: when the unicast packet is received, if the unicast packet has a corresponding forwarding table entry, forward the packet according to the forwarding table rule; and receive the unknown unicast packet. And determining, in the VXLAN domain, whether the broadcast function in the unknown packet domain is enabled; if the broadcast function in the unknown packet domain is enabled, the unknown unicast packet is broadcasted in the VXLAN domain according to a preset filtering and forwarding rule; Otherwise, the unknown unicast message is discarded.

The functions of the device in this embodiment have been described in the method embodiments shown in FIG. 4 to FIG. 17. Therefore, in the description of the present embodiment, reference may be made to the related description in the foregoing embodiment. This will not be repeated.

Embodiment 6

The embodiment further provides a computer program, a storage medium storing the program, and a PE device.

The program is executed to implement: performing a single dual-homing hybrid access configuration; wherein, configuring an MC-LAG, and configuring a PeerLink interface corresponding to the MC-LAG; configuring, on the MC-LAG interface, the MC-LAG The same ESI of the MC-LAG corresponding to the peer PE device; the MC-LAG interface, the PeerLink interface, and the single-homed interface are bound to the VXLAN domain; in the single-and-double hybrid access scenario, the packet is forwarded according to preset filtering. The rule is that in the VXLAN domain, the load sharing forwards the unicast packet and broadcasts the received broadcast & unknown unicast & multicast BUM message.

Further, in the performing the single dual-homing hybrid access configuration, the method further includes: prohibiting the PE device that is the same as the ESI of the MC-LAG from being a border gateway protocol BGP Ethernet virtual private network EVPN neighbor; The active/standby state of the MC-LAG is determined, and the DF state of the ESI of the MC-LAG is determined.

Further, according to the preset filtering and forwarding rule, in the VXLAN domain, the load sharing forwards the unicast packet and broadcasts the received BUM packet, including: if the MC-LAG interface and the single-homing interface are Receiving the unicast packet, and forwarding the unicast packet according to the forwarding table entry; if the BUM packet is received from the MC-LAG interface and the single-homed interface, directly broadcasting in the VXLAN domain The BUM message, if the BUM message is received from the PeerLink interface, the BUM message is prohibited from being broadcast to the MC-LAG interface and the VXLAN EVPN network side in the VXLAN domain, only to the The single-homed interface broadcasts the BUM message; if the BUM message is received from the VXLAN EVPN network side, the BUM message is prohibited from being broadcast to the PeerLink interface in the VXLAN domain, and only the single-homed interface is And the MC-LAG interface that meets the preset condition broadcasts the BUM message; the preset condition is that the DF state of the ESI configured on the MC-LAG interface is DF.

Further, the method further includes: updating the active/standby state of the MC-LAG corresponding to the local PE device, and re-determining according to the updated active/standby status of the MC-LAG, if the peer PE device is faulty. The DF state of the ESI of the MC-LAG corresponding to the local PE device; if the BGP device detects that the BGP EVPN neighbor device is faulty, the corresponding forwarding table entry transmitted by the BGP EVPN neighbor device is deleted; if the local PE device is If the MC-LAG interface is faulty, the forwarding table entry corresponding to the MC-LAG interface is deleted, and the BGP device is notified to the BGP EVPN neighboring device to delete the remote entry. If the MC-LAG interface of the local PE device is used, If the fault occurs, the active/standby status of the MC-LAG corresponding to the local PE device is updated, and the DF status of the ESI of the MC-LAG corresponding to the local PE device is re-determined according to the updated active/standby status of the MC-LAG; If the PeerLink interface of the local PE device is faulty, and the DF state of the ESI of the MC-LAG corresponding to the PeerLink interface is Non-DF, all MC-LAG interfaces are closed.

Further, according to the preset filtering and forwarding rule, in the VXLAN domain, the load sharing forwards the unicast packet and broadcasts the received BUM packet, including: determining the VXLAN domain when receiving the unknown unicast packet If the broadcast function in the unknown packet domain is enabled, if the broadcast function in the unknown packet domain is enabled, the unknown unicast packet is broadcasted in the VXLAN domain according to the preset filtering and forwarding rule; otherwise, the unknown is discarded. Unicast message.

The storage medium is mainly configured to store the above program. Therefore, the program in the storage medium is not described in detail in this embodiment; and the storage medium can store the above program.

In particular, the storage medium may be a computer readable storage medium having stored thereon a computer program that, when executed by a processor, implements the steps of the method of the embodiments of the invention.

The technical solution of the VXLAN single-homing and dual-homing hybrid access corresponding to the PE device disclosed in the foregoing embodiment can be implemented in the PE device to obtain the corresponding PE device. This embodiment is described as an example of operating a PE device. FIG. 19 is a schematic diagram of a hardware structure of a PE device that implements a VXLAN single-homed and dual-homed hybrid access method according to an embodiment of the present disclosure. As shown in FIG. 19, PE device 1900 can include one or more (only one shown) processor 1910 (processor 1910 can include, but is not limited to, a processing device such as a microprocessor MCU or a programmable logic device FPGA). A memory 1920 configured to store data and a data transceiver 1930 configured as a communication function. It will be understood by those skilled in the art that the structure shown in FIG. 19 is merely illustrative and does not impose a single limitation on the structure of the above electronic device. For example, the PE device 1900 may further include more or less components than those shown in FIG. 19 by splitting or merging the above functions, or have a configuration different from that shown in FIG.

The memory 1920 can be configured as a software program and a module for storing application software, and the program instructions/modules corresponding to the VXLAN single-homed and dual-homed hybrid access methods corresponding to the PE device disclosed in the foregoing embodiment can be stored in the memory 1920, regarding the VXLAN list. The dual-homing hybrid access method has been described in detail in the previous embodiments, and thus the present embodiment will not be repeated in detail.

The processor 1910 performs various functional applications and data processing by executing (executing) software programs and modules stored in the memory 1920, that is, implementing the above method. Memory 1920 can include high speed random access memory, and can also include non-volatile memory, such as one or more magnetic storage devices, flash memory, or other non-volatile solid state memory. In some examples, memory 1920 can further include memory (cloud memory) remotely located relative to processor 1910, which can be connected to PE device 1900 via a network. Examples of such networks include, but are not limited to, the Internet, intranets, local area networks, mobile communication networks, and combinations thereof.

The data transceiver 1930 is configured to receive or transmit data via a network. The network specific examples described above may include a wireless network provided by a communication provider of the PE device 1900. In one example, the data transceiver 1930 includes a NIC (Network Interface Controller) that can be connected to other network devices through a base station to communicate with the Internet. In one example, data transceiver 1930 includes an RF (Radio Frequency) module configured to communicate with the Internet wirelessly.

While the preferred embodiment of the present disclosure has been disclosed for purposes of illustration, those skilled in the art will recognize that various modifications, additions and substitutions are possible, and the scope of the present disclosure should not be limited to the embodiments described above.

Industrial applicability

The solution provided by the embodiment of the present disclosure is configured to perform a single-homing hybrid access configuration, where the MC-LAG is configured, and the PeerLink interface corresponding to the MC-LAG is configured; and the MC-LAG interface is configured and configured on the MC-LAG. The same ESI of the MC-LAG corresponding to the end PE device; the MC-LAG interface, the PeerLink interface, and the single-homed interface are bound to the VXLAN domain; in a single-and-double hybrid access scenario, according to a preset filtering and forwarding rule In the VXLAN domain, the load sharing forwards the unicast packet and broadcasts the received BUM packet, which combines the ESI technology and the MC-LAG Peerlink technology, and sets the filtering and forwarding rules on the basis of the VXLAN domain. The load sharing is performed, and the problem that the BUM packet loopback and/or the BUM packet cannot be received is solved. Therefore, the embodiment of the present disclosure can support the application scenario of single-homing and dual-homing hybrid access.

Claims

A virtual extended local area network VXLAN single-homing and dual-homing hybrid access method is implemented on a carrier edge PE device, including:

Performing a single-homed hybrid access configuration, where the inter-device link aggregation group MC-LAG is configured, and the PeerLink interface corresponding to the MC-LAG is configured; the MC-LAG interface is configured as the MC-LAG and the peer PE is configured. The same Ethernet segment identifier ESI of the MC-LAG corresponding to the device;

Binding the MC-LAG interface, the PeerLink interface, and the single-homed interface to a VXLAN domain;

In a single-and-double-homed hybrid access scenario, load balancing forwards unicast packets and broadcasts the received broadcast & unknown unicast & multicast BUM packets in the VXLAN domain according to the preset filtering and forwarding rules.
The method of claim 1, wherein when the performing a single dual-homing hybrid access configuration, the method further comprises:

The PE device that is the same as the ESI of the MC-LAG is prohibited from being the border gateway protocol BGP Ethernet virtual private network EVPN neighbor;

Determining the DF state of the ESI of the MC-LAG according to the active/standby state of the MC-LAG.
The method of claim 2, wherein the load balancing forwards the unicast message and broadcasts the received BUM message in the VXLAN domain according to the preset filtering and forwarding rule, including:

If the unicast packet is received from the MC-LAG interface and the single-homed interface, the unicast packet is forwarded according to the forwarding table entry;

If the BUM message is received from the MC-LAG interface and the single-homed interface, the BUM message is directly broadcasted in the VXLAN domain;

If the BUM message is received from the PeerLink interface, the BUM message is prohibited from being broadcast to the MC-LAG interface and the VXLAN EVPN network side in the VXLAN domain, and only the single-homed interface is broadcasted to the single-homed interface. BUM message;

If the BUM message is received from the VXLAN EVPN network, the BUM message is prohibited from being broadcast to the PeerLink interface in the VXLAN domain, and only the single-homed interface and the MC-LAG interface that meet the preset condition are The BUM message is broadcasted; the preset condition is that the DF state of the ESI configured on the MC-LAG interface is DF.
The method of claim 2, wherein the method further comprises:

If the fault of the peer PE device is detected, the active/standby state of the MC-LAG corresponding to the local PE device is updated, and the MC-LAG corresponding to the local PE device is re-determined according to the updated active/standby state of the MC-LAG. DF state of ESI;

If the BGP EVPN neighbor device is faulty, the BGP EVPN neighbor device sends the corresponding forwarding table entry.

If the MC-LAG interface of the local PE device is faulty, the forwarding table entry corresponding to the MC-LAG interface is deleted, and the BGP device is notified to enable the BGP EVPN neighboring device to delete the remote entry.

If the MC-LAG interface of the local PE device is faulty, the active/standby state of the MC-LAG corresponding to the local PE device is updated, and the local PE device is re-determined according to the updated active/standby state of the MC-LAG. The DF state of the ESI of the corresponding MC-LAG;

If the PeerLink interface of the local PE device fails, and the DF state of the ESI of the MC-LAG corresponding to the PeerLink interface is Non-DF, all MC-LAG interfaces are closed.
The method according to any one of claims 1 to 4, wherein, according to the preset filtering and forwarding rule, in the VXLAN domain, the load sharing forwards the unicast packet and broadcasts the received BUM packet, including:

When the unknown unicast packet is received, it is determined whether the VXLAN domain has enabled the broadcast function in the unknown packet domain;

If the broadcast function in the unknown packet domain is enabled, the unknown unicast packet is broadcasted in the VXLAN domain according to the preset filtering and forwarding rule; otherwise, the unknown unicast packet is discarded.
A virtual extended local area network VXLAN single-homing and dual-homing hybrid access device is implemented on a carrier edge PE device, including:

The configuration module is configured to perform a single-homed hybrid access configuration, where the inter-device link aggregation group MC-LAG is configured, and the PeerLink interface corresponding to the MC-LAG is configured; the MC-LAG interface is the MC-LAG Configure the same Ethernet segment identifier ESI as the MC-LAG corresponding to the peer PE device.

a binding module, configured to bind the MC-LAG interface, the PeerLink interface, and the single-homed interface to a VXLAN domain;

The forwarding module is configured to load and forward the unicast packet and broadcast the received broadcast & unknown unicast & multicast BUM report in the VXLAN domain according to a preset filtering and forwarding rule. Text.
The device of claim 6, wherein the configuration module is further configured to:

When the single-homing hybrid access configuration is performed, the PE device that is the same as the ESI of the MC-LAG is prohibited from being the border gateway protocol BGP Ethernet virtual private network EVPN neighbor;

Determining the DF state of the ESI of the MC-LAG according to the active/standby state of the MC-LAG.
The apparatus according to claim 7, wherein the forwarding module is configured to:

If the unicast packet is received from the MC-LAG interface and the single-homed interface, the unicast packet is forwarded according to the forwarding table entry;

If the BUM message is received from the MC-LAG interface and the single-homed interface, the BUM message is directly broadcasted in the VXLAN domain;

If the BUM message is received from the PeerLink interface, the BUM message is prohibited from being broadcast to the MC-LAG interface and the VXLAN EVPN network side in the VXLAN domain, and only the single-homed interface is broadcasted to the single-homed interface. BUM message;

If the BUM message is received from the VXLAN EVPN network, the BUM message is prohibited from being broadcast to the PeerLink interface in the VXLAN domain, and only the single-homed interface and the MC-LAG interface that meet the preset condition are The BUM message is broadcasted; the preset condition is that the DF state of the ESI configured on the MC-LAG interface is DF.
The device of claim 7, wherein the device further comprises a processing module; the processing module configured to:

If the fault of the peer PE device is detected, the active/standby state of the MC-LAG corresponding to the local PE device is updated, and the MC-LAG corresponding to the local PE device is re-determined according to the updated active/standby state of the MC-LAG. DF state of ESI;

If the BGP EVPN neighbor device is faulty, the BGP EVPN neighbor device sends the corresponding forwarding table entry.

If the MC-LAG interface of the local PE device is faulty, the forwarding table entry corresponding to the MC-LAG interface is deleted, and the BGP device is notified to enable the BGP EVPN neighboring device to delete the remote entry.

If the MC-LAG interface of the local PE device is faulty, the active/standby state of the MC-LAG corresponding to the local PE device is updated, and the local PE device is re-determined according to the updated active/standby state of the MC-LAG. The DF state of the ESI of the corresponding MC-LAG;

If the PeerLink interface of the local PE device fails, and the DF state of the ESI of the MC-LAG corresponding to the PeerLink interface is Non-DF, all MC-LAG interfaces are closed.
The device according to any one of claims 6 to 9, wherein the forwarding module is further configured to:

When the unknown unicast packet is received, it is determined whether the VXLAN domain has enabled the broadcast function in the unknown packet domain;

If the broadcast function in the unknown packet domain is enabled, the unknown unicast packet is broadcasted in the VXLAN domain according to the preset filtering and forwarding rule; otherwise, the unknown unicast packet is discarded.
An operator edge PE device, the PE device comprising a processor for data processing, a memory configured for data storage, and a data transceiver configured for data transmission and/or reception, the processor executing the memory storage When doing the data, do the following:

Performing a single-homed hybrid access configuration, where the inter-device link aggregation group MC-LAG is configured, and the PeerLink interface corresponding to the MC-LAG is configured; the MC-LAG interface is configured as the MC-LAG and the peer PE is configured. The same Ethernet segment identifier ESI of the MC-LAG corresponding to the device;

Binding the MC-LAG interface, the PeerLink interface, and the single-homed interface to a VXLAN domain;

In a single-and-double-homed hybrid access scenario, load balancing forwards unicast packets and broadcasts the received broadcast & unknown unicast & multicast BUM packets in the VXLAN domain according to the preset filtering and forwarding rules.
The PE device according to claim 11, wherein when said processor executes data stored in said memory, it further performs the following operations:

When the single-homing hybrid access configuration is performed, the PE device that is the same as the ESI of the MC-LAG is prohibited from being the border gateway protocol BGP Ethernet virtual private network EVPN neighbor;

Determining the DF state of the ESI of the MC-LAG according to the active/standby state of the MC-LAG.
The PE device of claim 12, wherein the load balancing forwards the unicast message and broadcasts the received BUM message in the VXLAN domain according to the preset filtering and forwarding rule, including:

If the unicast packet is received from the MC-LAG interface and the single-homed interface, the unicast packet is forwarded according to the forwarding table entry;

If the BUM message is received from the MC-LAG interface and the single-homed interface, the BUM message is directly broadcasted in the VXLAN domain;

If the BUM message is received from the PeerLink interface, the BUM message is prohibited from being broadcast to the MC-LAG interface and the VXLAN EVPN network side in the VXLAN domain, and only the single-homed interface is broadcasted to the single-homed interface. BUM message;

If the BUM message is received from the VXLAN EVPN network, the BUM message is prohibited from being broadcast to the PeerLink interface in the VXLAN domain, and only the single-homed interface and the MC-LAG interface that meet the preset condition are The BUM message is broadcasted; the preset condition is that the DF state of the ESI configured on the MC-LAG interface is DF.
The PE device of claim 12, wherein when said processor executes data stored in said memory, performing the following operations:

If the fault of the peer PE device is detected, the active/standby state of the MC-LAG corresponding to the local PE device is updated, and the MC-LAG corresponding to the local PE device is re-determined according to the updated active/standby state of the MC-LAG. DF state of ESI;

If the BGP EVPN neighbor device is faulty, the BGP EVPN neighbor device sends the corresponding forwarding table entry.

If the MC-LAG interface of the local PE device is faulty, the forwarding table entry corresponding to the MC-LAG interface is deleted, and the BGP device is notified to enable the BGP EVPN neighboring device to delete the remote entry.

If the MC-LAG interface of the local PE device is faulty, the active/standby state of the MC-LAG corresponding to the local PE device is updated, and the local PE device is re-determined according to the updated active/standby state of the MC-LAG. The DF state of the ESI of the corresponding MC-LAG;

If the PeerLink interface of the local PE device fails, and the DF state of the ESI of the MC-LAG corresponding to the PeerLink interface is Non-DF, all MC-LAG interfaces are closed.
The PE device according to any one of claims 11 to 14, wherein, according to the preset filtering and forwarding rule, in the VXLAN domain, the load sharing forwards the unicast packet and broadcasts the received BUM packet, including:

When the unknown unicast packet is received, it is determined whether the VXLAN domain has enabled the broadcast function in the unknown packet domain;

If the broadcast function in the unknown packet domain is enabled, the unknown unicast packet is broadcasted in the VXLAN domain according to the preset filtering and forwarding rule; otherwise, the unknown unicast packet is discarded.
A computer storage medium having stored thereon a computer program, the computer program being executed by a processor to perform the steps of the method of any one of claims 1 to 5.