WO2015032261A1 - 路由更新方法和路由设备 - Google Patents

路由更新方法和路由设备 Download PDF

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Publication number
WO2015032261A1
WO2015032261A1 PCT/CN2014/084061 CN2014084061W WO2015032261A1 WO 2015032261 A1 WO2015032261 A1 WO 2015032261A1 CN 2014084061 W CN2014084061 W CN 2014084061W WO 2015032261 A1 WO2015032261 A1 WO 2015032261A1
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Prior art keywords
vlan
information
mac
mac address
network
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PCT/CN2014/084061
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English (en)
French (fr)
Inventor
张民贵
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华为技术有限公司
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Publication of WO2015032261A1 publication Critical patent/WO2015032261A1/zh

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Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00Data switching networks
    • H04L12/28Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
    • H04L12/46Interconnection of networks
    • H04L12/4604LAN interconnection over a backbone network, e.g. Internet, Frame Relay
    • H04L12/462LAN interconnection over a bridge based backbone
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00Data switching networks
    • H04L12/28Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
    • H04L12/46Interconnection of networks
    • H04L12/4641Virtual LANs, VLANs, e.g. virtual private networks [VPN]
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L45/00Routing or path finding of packets in data switching networks
    • H04L45/02Topology update or discovery
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L45/00Routing or path finding of packets in data switching networks
    • H04L45/66Layer 2 routing, e.g. in Ethernet based MAN's

Definitions

  • the present invention relates to the field of communications technologies, and in particular, to a route update method and a routing device.
  • BACKGROUND OF THE INVENTION Ethernet uses STP (Span Tree Protocol) in the data forwarding layer.
  • STP is a data link layer (Layer 2) communication protocol based on OSI (Open System Interconnect Reference Model).
  • OSI Open System Interconnect Reference Model
  • STP can generate a tree for the network topology, avoiding network loopback in the LAN, and solving the "broadcast storm" problem of the ring-over Ethernet network.
  • OSI Open System Interconnect Reference Model
  • STP can eliminate loop connections caused by mistakes or accidents.
  • STP has obvious disadvantages, such as: (1) STP prevents loops by blocking certain ports, does not allow multipath routing, and all traffic is spread on a tree even if there are idle links.
  • the TRILL (Transparent Interconnection of Lots of Links) protocol is an Internet Layer 2 Ethernet multi-route solution that is being standardized by the Internet Engineering Task Force (IETF) to overcome the shortcomings of STP.
  • the TRILL protocol introduces the Layer 3 (network layer) IS-IS (Intermediate System to Intermediate System) routing protocol to replace the STP protocol at the Layer 2 (data link layer).
  • the path performs data forwarding, making multi-path routing possible, making the use of bandwidth more sufficient.
  • the TRILL protocol encapsulates a hop count field in the packet to solve the temporary routing loop problem.
  • TRILL network Compared with traditional Ethernet running STP protocol, TRILL network has the important fast convergence speed. Advantage.
  • the STP network accesses the edge of the TRILL network. This is a common networking mode. However, in this networking mode, the network convergence speed is slow and cannot meet the market requirements.
  • multiple RBs (Routing Bridges) are connected to the STP network, and one RB is elected as a DRB (Designated RB), and an RB is designated as an STP network by the DRB.
  • DRB Designated RB
  • VLAN Virtual Local Area Network
  • X AF Appointed Forwarder
  • the AF is responsible for receiving and sending the VLAN-x packets.
  • AF is a TRILL-specific mechanism defined in RFC (Request For Comments) 6349.
  • the link of the STP network is faulty (for example, the network cable is removed). If the role of the AF as the VLAN-x is changed, the AF changes from RB1 to RB3.
  • the AF (RB1) before the change can pass the IS-IS LSP.
  • Link State Protocol Data Unit advertises other RBs in the TRILL network. After acquiring the event, other RBs will use the AF (RBl) as the ingress RB in the MAC address table. All related MAC addresses are cleared.
  • the AF does not send LSPs to clear other RBs on the TRILL network.
  • RB1 is the AF of VLAN-x
  • the STP network topology changes
  • RB1 is still the AF of VLAN-x
  • some hosts in VLAN-x that previously connected to the TRILL network through RBI are now changed to connect through RB2.
  • RB1 does not advertise the change to the far-end RB.
  • the MAC address of the remote RB is stale, and the VLAN-x is still used as the MAC address of the ingress router. The address can be cleared until the address is aged. During this time, the far end
  • the RB continues to send TRILL data packets to RB1, causing traffic black holes.
  • the technical problem to be solved by the present invention is that, in the scenario where the STP network and the TRILL network are mixed, when the state of the host in the VLAN is changed by the AF as the ingress routing bridge, How to reduce data packet loss.
  • an embodiment of the present invention provides a route update method, including:
  • the MAC address of the VLAN in which the AF is used as the ingress routing bridge in the AF is cleared, and the VLAN passes through the
  • the STP network accesses the multi-link transparent interconnection TRILL network; the MAC revocation indication is sent in the TRILL network multicast, where the MAC revocation indication is used to instruct the receiver to clear the VLAN that uses the AF as the ingress routing bridge MAC address.
  • the transmitting, by the TRILL network, a MAC revocation indication including:
  • a terminal address exchange information ESADI message to a member of the multicast tree of the VLAN, where the ESADI message carries the AF information, the VLAN information, and the MAC revocation information,
  • the information of the VLAN includes a label of the VLAN or a refinement label FGL corresponding to the label of the VLAN.
  • the embodiment of the present invention provides a route update method, including: receiving a MAC cancellation of the AF sending when a topology of a spanning tree protocol STP network connected to a designated forwarder AF of a virtual local area network (VLAN) is changed Instructing, by using the STP network, the VLAN to access a multi-link transparent interconnect TRILL network;
  • the receiving the MAC revocation indication sent by the AF includes:
  • the clearing, according to the MAC revocation indication, clearing a MAC address of the VLAN that uses the AF as an ingress routing bridge include:
  • the information about the VLAN includes a label of a VLAN or a refinement label FGL corresponding to a label of the VLAN, where The information of the AF and the information of the VLAN are used to find and clear the MAC address of the VLAN that uses the AF as an ingress routing bridge, including:
  • the MAC address corresponding to the FGL with the AF as the ingress routing bridge is found and cleared.
  • an embodiment of the present invention provides a routing device, including:
  • a clearing unit configured to: when a topology of the spanning tree protocol STP network connected to the designated forwarder AF of the virtual local area network (VLAN) is changed, clear a MAC address of the VLAN in the AF that uses the AF as an ingress routing bridge The VLAN accesses the multi-link transparent interconnected TRIM network through the STP network;
  • a sending unit configured to send, in the TRILL network, a MAC revocation indication, where the MAC revocation indication is used to instruct the receiver to clear a MAC address of the VLAN that uses the AF as an ingress routing bridge.
  • the sending unit is specifically configured to send terminal address interaction information to a member of a multicast tree of the VLAN in the TRILL network.
  • the information of the AF, the information of the VLAN, and the MAC revocation information are carried in the ESADI message, and the information of the VLAN includes a label of a VLAN or a refinement label FGL corresponding to a label of the VLAN.
  • an embodiment of the present invention provides a routing device, including:
  • a receiving unit configured to receive a MAC revocation indication sent by the AF when the topology of the spanning tree protocol STP network connected to the designated forwarder AF of the virtual local area network (VLAN) is changed, and the VLAN accesses the multiple chain through the STP network Road transparent interconnection TRILL network;
  • a clearing unit configured to clear, according to the MAC revocation indication, a MAC address of the VLAN that uses the AF as an ingress routing bridge.
  • the receiving unit is configured to receive, by the AF, a terminal address exchange information, an ESADI message, where the information of the AF is carried in the ESADI message.
  • the VLAN information and MAC revocation information are included in the ESADI message.
  • the clearing unit includes:
  • a parsing subunit configured to parse the information of the AF, the information of the VLAN, and the MAC revocation information from the ESADI message.
  • a clearing subunit configured to find and clear a MAC address of the VLAN that uses the AF as an ingress routing bridge according to the information of the AF and the information of the VLAN.
  • the information of the VLAN includes a label of a VLAN or a refinement label FGL corresponding to a label of the VLAN, the clearer
  • the unit is specifically used to:
  • the AF when the VLAN is connected to the TRILL network through the STP network, when the STP network topology connected to the AF of the VLAN is changed, the AF is used as the ingress routing bridge in the AF.
  • the MAC revocation indication may be sent in the TRILL network multicast, so that the receiver, such as RB2, RB3, etc., can timely clear the MAC address of the VLAN that uses the AF as the ingress routing bridge. Achieve fast aging of MAC addresses to prevent traffic black holes, reduce data packet loss, reduce packet loss rate, and improve TRILL network performance.
  • Figure la is a flowchart of a route update method according to a first embodiment of the present invention
  • Figure lb and Figure 1c are application scenario diagrams of a route update method according to Embodiment 1 of the present invention
  • Figure 2a is a flow chart of a route update method according to Embodiment 2 of the present invention
  • Figure 2b is a schematic diagram of a MAC Withdraw TLV in a route update method according to Embodiment 2 of the present invention
  • FIG. 3 is a flowchart of a route update method according to Embodiment 3 of the present invention
  • FIG. 4 is a flowchart of a route update method according to Embodiment 4 of the present invention
  • FIG. 5 is a structural block diagram of a routing device according to Embodiment 5 of the present invention
  • a structural block diagram of a routing device according to Embodiment 6 of the present invention
  • FIG. 7 is a structural block diagram of a routing device according to Embodiment 7 of the present invention.
  • FIG. 1 is a flowchart of a route update method according to Embodiment 1 of the present invention. As shown in FIG. la, the route update method may include:
  • Step 101 When the topology of the spanning tree protocol STP network connected to the designated forwarder AF of the virtual local area network (VLAN) is changed, the MAC address of the VLAN in which the AF is used as the ingress routing bridge in the AF is cleared.
  • the VLAN is connected to the multi-link transparent interconnected TRI network through the STP network.
  • FIG. 1b and FIG. 1C are application scenario diagrams of a route update method according to Embodiment 1 of the present invention.
  • the host H belongs to VLAN 1.
  • the switch of the host H through the STP network can access the routing bridge of the TRILL network, such as RB1, and RB1 is the AF of VLAN 1.
  • RB1 is the ingress route of VLAN 1 accessing the TRILL network.
  • the bridge, the RB1, RB2, and RB3 of the TRILL network store the MAC address of the ingress routing bridge that accesses the TRILL network by using RB 1 as the VLAN 1.
  • the AF of VLAN 1 participates in the BPDU (Bridge Protocol Data Unit) of the STP network protocol.
  • BPDU Bridge Protocol Data Unit
  • the ingress routing bridge that accesses the TRILL network is configured by RB1. It becomes RB2.
  • RB 1 can clear the MAC address of VLAN 1 with RB1 as the ingress routing bridge.
  • Step 102 Send a MAC revocation indication in the TRILL network multicast, where the MAC revocation indication is used to instruct the receiver to clear the MAC address of the VLAN that uses the AF as an ingress routing bridge.
  • routers of the TRILL network may receive the MAC revocation indication, and the receivers such as RB2, RB3, etc., may clear the MAC address of the VL AN1 that uses RB1 as the ingress routing bridge.
  • the VLAN in which the AF is used as the ingress routing bridge in the AF may be cleared.
  • the MAC revocation indication may be sent in the TRILL network multicast, so that the receiver, such as RB2, RB3, etc., can timely clear the MAC address of the VLAN that uses the AF as the ingress routing bridge.
  • the MAC address is rapidly aged to prevent traffic black holes, which reduces data packet loss, reduces packet loss rate, and improves TRILL network performance.
  • the ESADI (End Station Address Distribution Information) protocol is defined in the TRILL protocol.
  • the ESADI protocol is a protocol used by RB (Routing Bridge) to spread the MAC address learned by itself. It is used to spread the MAC address of VLAN-x learned by RB1 through multicast in the data layer of TRILL.
  • 2a is a flowchart of a route update method according to Embodiment 2 of the present invention. The steps in FIG. 2a and FIG. 1 have the same meanings, and the difference from the previous embodiment is mainly as follows: as shown in FIG. 2a, the revocation indication of the previous embodiment can be implemented by using an ESADI message, in step 102. And the transmitting, by the AF, the MAC revocation indication in the TRILL network multicast may include:
  • Step 201 Send a terminal to a member of a multicast tree of the VLAN in the TRILL network.
  • the address interaction information is an ESADI message, where the ESADI message carries the information of the AF, the information of the VLAN, and the MAC revocation information, where the information of the VLAN includes a label of a VLAN or a refinement corresponding to a label of the VLAN.
  • the label FGL, the MAC revocation information can be in the format of type, length, value (Type, Length, Value, TLV).
  • the MAC revocation information in the embodiment of the present invention may be extended to define a MAC revocation (Withdraw) TLV of the ESADI message, and is used for the reverse action: clearing the MAC address (address) of the VLAN 1 that is learned by the RB1 as the ingress RB.
  • the AF of the VLAN such as the RBI, detects that the local STP network topology changes, and can construct an ESADI packet including the MAC Withdraw TLV, and send the ESADI packet to the member RB of the VLAN multicast tree in the TRILL network for clearing.
  • This RB 1 is the MAC address of VLAN 1 of the AF.
  • RB2 and RB3 after receiving the ESADI packet containing the MAC Withdraw TLV, can parse and obtain the information of the AF (such as RBI) and VLAN1, and query the local MAC address table according to the information. Clear all MAC addresses of VLAN 1 with RB1 as AF saved in the MAC address table.
  • TRILL currently expands FGL (Fine Grained Labeling) to support more tenants.
  • FGL can be configured on the port of the ingress RB to complete VLAN to FGL mapping.
  • the embodiment of the present invention can determine the value of the corresponding field FGL in the ESADI message by querying the port information.
  • FIG. 2b is a schematic diagram of a MAC Withdraw TLV in the route update method according to the second embodiment of the present invention.
  • the MAC Withdraw TLV may be used in the embodiment of the present invention.
  • Length refers to the length of the Value part of the information
  • Confidence refers to the "confidence" of the message determined by the sender RB.
  • These three parameters can all be 1 byte (byte).
  • the label or FGL of the corresponding field VLAN can be read from the intrinsic header of the ESADI message, for example: [draft-ietf-trill-esadi-02].
  • the AF can directly determine the value of the FGL according to the label structure of the VLAN or the mapping relationship between the local VLAN and the FGL.
  • the mapping between VLAN and FGL is affected by local topology changes.
  • the remote RB such as RB2 and RB3, receives the MAC Withdraw TLV, and can clear the MAC address corresponding to the label of the VLAN, or clear the MAC address corresponding to the FGL.
  • the RB of the TRILL network can learn the MAC address of the ingress router with the correct RB (such as RB2).
  • the TRILL network may also send a MAC revocation indication through the ESADI packet multicast, so that the receiver, such as RB2, RB3, etc., can timely clear the VLAN that uses the AF as the ingress routing bridge.
  • MAC address fast aging of MAC addresses, preventing traffic black holes, reducing data packet loss, reducing packet loss rate, and improving TRILL network performance.
  • FIG. 3 is a flowchart of a route update method according to Embodiment 3 of the present invention. As shown in FIG. 3, the route update method may include:
  • Step 301 Receive a MAC revocation indication sent by the AF when the topology of the spanning tree protocol STP network connected to the designated forwarder AF of the virtual local area network (VLAN) is changed, and the VLAN accesses the multi-link through the STP network.
  • Transparent interconnection TRILL network Transparent interconnection TRILL network.
  • host H belongs to VLAN 1.
  • the switch of the host H through the STP network can access the routing bridge of the TRILL network, such as RB1, and RB1 is the AF of VLAN 1.
  • RB1 is the ingress route of VLAN 1 accessing the TRILL network.
  • Bridge, TRILL network routing bridges such as In RB1, RB2, and RB3, an ingress routing bridge that accesses the TRILL network by using RBI as VLAN1 is learned to obtain a MAC address.
  • the AF of VLAN 1 participates in the BPDU exchange of the STP network protocol.
  • the ingress route bridge of the VLAN 1 accessing the TRILL network changes from RBI to RB2.
  • the topology of the STP network connected to the AF of the VLAN 1 is changed, but the RB1 is still the AF of the VLAN 1, the RBI can clear the MAC address of the VLAN 1 that uses the RBI as the ingress routing bridge.
  • the other routing bridges of the TRILL network such as RB2 and RB3, can receive the MAC revocation indication.
  • Step 302 Clear, according to the MAC revocation indication, a MAC address of the VLAN that uses the AF as an ingress routing bridge.
  • RB2 if RB2 receives the MAC revocation indication, it can clear the MAC address of VLAN 1 that uses RB1 as the ingress route bridge.
  • the VLAN when the VLAN is connected to the TRILL network through the STP network, when the STP network topology connected to the AF of the VLAN is changed, if the receiver receives the AF, such as RB2 and RB3, the MAC address is cancelled in the TRILL network.
  • the indication is that the MAC address of the VLAN in which the AF is used as the ingress routing bridge is saved in a timely manner, so that the MAC address is quickly aged to prevent traffic black holes, thereby reducing data packet loss and reducing packet loss rate.
  • TRILL network performance when the VLAN is connected to the TRILL network through the STP network, when the STP network topology connected to the AF of the VLAN is changed, if the receiver receives the AF, such as RB2 and RB3, the MAC address is cancelled in the TRILL network.
  • the indication is that the MAC address of the VLAN in which the AF is used as the ingress routing bridge is saved in a timely manner, so that the MAC address is quickly aged to prevent traffic
  • Step 401 Receive an ESADI message sent by the AF, where the ESADI message carries information about the AF, information about the VLAN, and MAC revocation information.
  • the AF of the VLAN detects that the local STP network topology changes.
  • the ESADI message including the MAC Withdraw TLV is constructed, and the ESADI message is sent to the member RB of the VLAN multicast tree in the TRILL network.
  • the member RBs of the VLAN multicast tree such as RB2 and RB3, can receive the ESADI packets sent by the AF.
  • For the content of the ESADI message refer to the related description of Embodiment 2 and Figure 2b.
  • the MAC address of the VLAN that uses the AF as the ingress routing bridge is cleared according to the MAC revocation indication, which may specifically include:
  • Step 402 Parse the information of the AF, the information about the VLAN, and the MAC revocation message from the ESADI message.
  • Step 403 Search and clear, according to the information of the AF and the information of the VLAN, a MAC address of the VLAN that uses the AF as an ingress routing bridge.
  • the information of the VLAN may include a label of the VLAN or a refinement label FGL corresponding to the label of the VLAN, and the step 403 may specifically include any of the following manners:
  • Manner 1 In the MAC address table, find and clear a MAC address corresponding to the label of the VLAN by using the AF as an ingress routing bridge.
  • the RB1 is an ingress routing bridge
  • the MAC address table of the RB can be directly searched for
  • the AF address is an ingress routing bridge and the MAC address corresponding to the label of the VLAN.
  • the found MAC address may not exist, or may be one or more, and all the found MAC addresses are cleared.
  • Manner 2 Find the FGL corresponding to the label of the VLAN in the port information, and search for and clear the MAC address corresponding to the FGL by using the AF as an ingress routing bridge in the MAC address table.
  • the information of the VLAN that is parsed in the ESADI packet received by the RB is the FGL corresponding to the label of the VLAN, and the information of the AF is parsed, such as the RBI being the ingress routing bridge, it may be directly in the MAC address table of the RB. Finding that the AF is used as an ingress routing bridge and corresponding to the FGL The MAC address, the found MAC address may not exist, or it may be one or more, and all the found MAC addresses are cleared.
  • the VLAN when the VLAN is connected to the TRILL network through the STP network, when the STP network topology connected to the AF of the VLAN is changed, if the receiver receives the AF, such as RB2 and RB3, the MAC address is cancelled in the TRILL network.
  • the indication is that the MAC address of the VLAN in which the AF is used as the ingress routing bridge is saved in a timely manner, so that the MAC address is quickly aged to prevent traffic black holes, thereby reducing data packet loss and reducing packet loss rate.
  • TRILL network performance when the VLAN is connected to the TRILL network through the STP network, when the STP network topology connected to the AF of the VLAN is changed, if the receiver receives the AF, such as RB2 and RB3, the MAC address is cancelled in the TRILL network.
  • the indication is that the MAC address of the VLAN in which the AF is used as the ingress routing bridge is saved in a timely manner, so that the MAC address is quickly aged to prevent traffic
  • FIG. 5 is a structural block diagram of a routing device according to Embodiment 5 of the present invention. As shown in FIG. 5, the routing device may include:
  • the clearing unit 51 is configured to: when the topology of the spanning tree protocol STP network connected to the designated forwarder AF of the virtual local area network (VLAN) is changed, clear the MAC address of the VLAN in the AF that uses the AF as the ingress routing bridge The VLAN accesses the multi-link transparent interconnect TRILL network through the STP network;
  • the sending unit 53 is configured to send a MAC revocation indication in the TRILL network multicast, where the MAC revocation indication is used to instruct the receiver to clear the MAC address of the VLAN that uses the AF as an ingress routing bridge.
  • the host H belongs to the VLAN 1.
  • the switch of the host H through the STP network can access the routing bridge of the TRILL network, such as RB1, and RB1 is the AF of VLAN 1.
  • RB1 is the ingress route for VLAN 1 to access the TRILL network.
  • the bridge, the routing routers of the TRILL network, such as RB1, RB2, and RB3, store the MAC address of the ingress routing bridge that accesses the TRILL network by using RBI as VLAN 1.
  • the clearing unit 51 of the routing device can clear the AF route in the AF.
  • the MAC address of the VLAN of the bridge; the sending unit 53 may multicast the MAC revocation indication on the TRILL network, so that the receiver clears the MAC address of the VLAN that routes the bridge with the AF as the ingress.
  • the sending unit 53 is specifically configured to send, in the TRILL network, a terminal address interaction information ESADI message to a member of a multicast tree of the VLAN, where the ESADI message carries the The information of the AF, the information of the VLAN, and the MAC revocation information, where the information of the VLAN includes a label of a VLAN or a refinement label FGL corresponding to a label of the VLAN.
  • ESADI message For the content of the ESADI message, refer to the related descriptions of Embodiment 2 and Figure 2b.
  • the clearing unit can clear the AF in the AF as the ingress routing bridge.
  • the sending unit may also send a MAC revocation indication in the TRILL network multicast, so that the receiver, such as RB2, RB3, etc., can timely clear the VLAN that uses the AF as the ingress routing bridge.
  • the MAC address is used to implement fast aging of MAC addresses to prevent traffic black holes. This reduces data packet loss, reduces packet loss, and improves TRILL network performance.
  • FIG. 6 is a structural block diagram of a routing device according to Embodiment 6 of the present invention. As shown in FIG. 6, the routing device may include:
  • the receiving unit 61 is configured to receive, when the topology of the spanning tree protocol STP network connected to the designated forwarder AF of the virtual local area network (VLAN) is changed, the MAC revocation indication sent by the AF, where the VLAN is accessed through the STP network.
  • Link transparent interconnection TRILL network
  • the clearing unit 63 is configured to clear, according to the MAC revocation indication, a MAC address of the VLAN that uses the AF as an ingress routing bridge.
  • the host H belongs to the VLAN 1.
  • host H can access through the switch of the STP network.
  • the routing bridge of the TRILL network is RB1
  • the RBI is the AF of the VLAN 1.
  • the RBI is the ingress routing bridge of the VLAN 1 accessing the TRILL network
  • the routing bridges of the TRILL network are RB1, RB2, and RB3.
  • the ingress routing bridge that accesses the TRILL network with RBI as VLAN1 learns to obtain the MAC address.
  • the receiving unit 61 of the routing device may receive the MAC revocation indication sent by the AF.
  • the clearing unit 63 may clear the indication according to the MAC revocation indication.
  • the AF is the MAC address of the VL AN of the ingress routing bridge.
  • the receiving unit 61 may be configured to receive an ESADI packet sent by the AF, where the ESADI packet carries information about the AF, information about the VLAN, and MAC revocation information. .
  • the clearing unit 63 may include:
  • the parsing sub-unit 631 is configured to parse the information of the AF, the information of the VLAN, and the MAC revocation information from the ESADI message.
  • the content of the ESADI message can be referred to the related description of the second embodiment and the second embodiment. .
  • the clearing subunit 633 is configured to find and clear a MAC address of the VLAN that uses the AF as an ingress routing bridge according to the information of the AF and the information of the VLAN.
  • the information of the VLAN includes a label of a VLAN or a refinement label FGL corresponding to a label of the VLAN, where the clearing subunit 633 is specifically configured to:
  • the FGL corresponding to the label of the VLAN is searched for in the port information, and the MAC address corresponding to the FGL with the AF as an ingress routing bridge is searched for and cleared in the MAC address table.
  • the clearing unit can clear in time
  • the MAC address of the VLAN in which the AF is used as the ingress routing bridge is saved by itself, and the MAC address is quickly aged to prevent traffic black holes, thereby reducing data packet loss, reducing packet loss rate, and improving TRILL network performance.
  • FIG. 7 is a structural block diagram of a routing device according to Embodiment 7 of the present invention.
  • the routing device can be a host server with computing power, a personal computer PC, or a portable computer or terminal that can be carried.
  • the specific embodiments of the present invention do not limit the specific implementation of the computing node.
  • the routing device includes a processor 1110, a communications interface 1120, a memory array 130, and a bus 1140.
  • the processor 1110, the communication interface 1120, and the memory 1130 complete communication with each other through the bus 1140.
  • the communication interface 1120 is configured to communicate with a network element, where the network element includes, for example, a virtual machine management center, shared storage, and the like.
  • the processor 1110 is for executing a program.
  • the processor 1110 may be a central processing unit CPU, or an Application Specific Integrated Circuit (ASIC), or one or more integrated circuits configured to implement embodiments of the present invention.
  • ASIC Application Specific Integrated Circuit
  • the memory 1130 is used to store files.
  • the memory 1130 may include a high speed RAM memory and may also include a non-volatile memory such as at least one disk memory.
  • Memory 1130 can also be a memory array.
  • the memory 1130 may also be partitioned, and the blocks may be combined into a virtual volume according to certain rules.
  • the above program may be program code including computer operating instructions. This program can be used to:
  • the MAC address of the VLAN in which the AF is used as the ingress routing bridge in the AF is cleared, and the VLAN passes through the
  • the STP network accesses the multi-link transparent interconnection TRILL network; the MAC revocation indication is sent in the TRILL network multicast, and the MAC revocation indication is used to refer to The recipient is shown clearing the MAC address of the VLAN that routes the bridge with the AF as the ingress.
  • the multicast sending MAC revocation indication in the TRILL network includes:
  • a terminal address exchange information ESADI message to a member of the multicast tree of the VLAN, where the ESADI message carries the AF information, the VLAN information, and the MAC revocation information,
  • the information of the VLAN includes a label of the VLAN or a refinement label FGL corresponding to the label of the VLAN.
  • the program may be further configured to: when the topology of the spanning tree protocol STP network connected to the designated forwarder AF of the virtual local area network (VLAN) is changed, receive the MAC revocation indication sent by the AF, and the VLAN is accessed by using the STP network.
  • Multi-link transparent interconnection TRILL network Multi-link transparent interconnection TRILL network
  • the receiving the MAC revocation indication sent by the AF includes: receiving an ESADI message sent by the AF, where the ESADI message carries information about the AF, information about the VLAN, and MAC revocation information.
  • the clearing, according to the MAC revocation indication, the MAC address of the VLAN that uses the AF as an ingress routing bridge includes:
  • the information of the VLAN includes a label of a VLAN or a refinement label FGL corresponding to a label of the VLAN, where the information is searched and cleared according to the information of the AF and the information of the VLAN.
  • the MAC address of the VLAN that routes the bridge by using the AF as an ingress includes: In the MAC address table, find and clear a MAC address corresponding to the label of the VLAN by using the AF as an ingress routing bridge; or in the MAC address table, find and clear the routing bridge with the AF as an ingress and The MAC address corresponding to the FGL.
  • the computer software product is typically stored in a computer readable storage medium, including instructions for causing a computer device (which may be a personal computer, server, or network device, etc.) to perform all or part of the steps of various embodiments of the present invention.
  • a computer device which may be a personal computer, server, or network device, etc.
  • the foregoing storage medium includes a USB flash drive, a removable hard disk, a read-only memory (ROM), and a random access memory (RAM, Random).
  • Access Memory a variety of media that can store program code, such as a disk or a disc.

Abstract

本发明涉及一种路由更新方法和路由设备,其中,该路由更新方法包括:在VLAN的AF所连的STP网络的拓扑发生变更时,清除所述AF中以所述AF为入口路由网桥的所述VLAN的MAC地址,所述VLAN通过所述STP网络接入TRILL网络;在所述TRILL网络组播发送MAC撤销指示,所述MAC撤销指示用于指示接收者清除以所述AF为入口路由网桥的所述VLAN的MAC地址。通过在所述TRILL网络组播发送MAC撤销指示,本发明实施例可以使接收者能够及时清除以AF为入口路由网桥的VLAN的MAC地址,实现MAC地址的快速老化,防止出现流量黑洞,从而减少数据报文丢失,降低了丢包率,改善TRILL网络性能。

Description

路由更新方法和路由设备 技术领域 本发明涉及通信技术领域, 尤其涉及一种路由更新方法和路由设备。 背景技术 以太网在数据转发层采用了 STP ( Span Tree Protocol, 生成树协议)。 STP是基于 OSI ( Open System Interconnect Reference Model, 开放式系统互 联参考模型) 的数据链路层(二层)通讯协定。 STP可以将网络拓扑生成一 棵树, 避免局域网中的网络环回, 解决成环以太网网络的 "广播风暴" 问 题。 STP作为一种网络保护技术, 可以消除由于失误或者意外带来的循环连 接。 但是 STP具有明显的缺点, 例如: (1 ) STP通过阻塞某些端口来防止环 路, 不允许多路径路由(multipath routing) ,所有的流量都在一棵树上传播, 即使存在空闲的链路也不能被使用, 带宽利用不充分; (2 ) 流量会沿着非 最优路径(如最短路径)传输; (3 )在 STP协议中,以太数据帧没有 TTUTime To Live, 生存时间) 字段, 如果出现通信故障而导致环路时, 依然会产生 广播风暴问题, 对网络的危害很严重。
TRILL ( Transparent Interconnection of Lots of Links, 多链路透明互联 ) 协议是 IETF (Internet Engineering Task Force, 因特网工程任务组) 正在标 准化的互联网二层以太网多路由解决方案, 可以克服 STP的不足。 TRILL协 议在二层(数据链路层)引入三层(网络层)的 IS-IS (Intermediate System To Intermediate System , 中间系统到中间系统的) 路由选择协议 ( Routing Protocol) 取代 STP协议, 可以按照最短路径进行数据转发, 使得多路径路 由成为可能,使得带宽的利用更加充分。 TRILL协议在数据包中封装了跳数 (hop count) 字段, 用于解决临时的路由环路问题。
与传统运行 STP协议的以太网相比, TRILL网络具有收敛速度快的重要 优势。 在 TRILL实际部署时, STP网络接入 TRILL网络的边缘是一种常见组 网方式, 但这种组网方式, 网络收敛速度较慢, 无法满足市场需求。 为了 提高网络收敛速度, 在 TRILL协议中, 多个 RB (Routing Bridge, 路由网桥) 接入 STP网络, 选举一个 RB作为 DRB (Designated RB, 指定路由网桥) , 由 DRB指定一个 RB作为 STP网络 VLAN (Virtual Local Area Network, 虚拟 局域网) -X的 AF (Appointed Forwarder, 指定转发者) 。 其中, AF可以是
DRB自己。 AF负责收、 发该 VLAN-x的报文。 AF是 TRILL特有的机制, 该 机制在 RFC (Request For Comments, 请求评价) 6349中定义。 当该 AF连接
STP网络的链路发生故障(例如网线拔出) , 如果 AF作为 VLAN-x的角色也 发生改变如: AF从 RB1变成 RB3 , 改变前的 AF (RB1 )可以通过 IS-IS的 LSP
(Link State Protocol Data Unit,, 链路状态协议数据单元) 通告 TRILL网络 中其他 RB,其他 RB在获取该事件后,会将自己 MAC地址表中以该 AF (RBl ) 为入口 (ingress) RB的所有相关 MAC地址清空。
但是,如果仅是 STP网络拓扑发生变化, AF作为 VLAN-x的角色没有 发生改变, 该 AF不会发出 LSP报文来清空 TRILL网络中其他 RB。 例如: 假设 RB1是 VLAN-x的 AF, STP网络拓扑发生变化, RB1依然是 VLAN-x 的 AF, 但 VLAN-x中的某些以前通过 RBI接入 TRILL网络的主机, 现在 变更为通过 RB2接入 TRILL网络。这种情况下, RB1不会把该变化通告远 端的 RB。造成远端 RB学习到的 MAC地址陈旧,仍然保留 VLAN-x以 RB1 为入口路由网桥的 MAC 地址, 直至地址老化才能清除。 在此期间, 远端
RB继续向 RB1发送 TRILL数据报文, 进而造成流量黑洞。
发明内容 技术问题
有鉴于此,本发明要解决的技术问题是,在 STP网络与 TRILL网络混合 组网的场景下, VLAN中主机以 AF作为入口路由网桥的状态发生变更时, 如何减少数据报文丢失。 解决方案
为了解决上述技术问题, 在第一方面, 本发明实施例提供了一种路由 更新方法, 包括:
在虚拟局域网 VLAN的指定转发者 AF所连的生成树协议 STP网络的拓 扑发生变更时, 清除所述 AF中以所述 AF为入口路由网桥的所述 VLAN的 MAC地址, 所述 VLAN通过所述 STP网络接入多链路透明互联 TRILL网络; 在所述 TRILL网络组播发送 MAC撤销指示, 所述 MAC撤销指示用于指 示接收者清除以所述 AF为入口路由网桥的所述 VLAN的 MAC地址。
结合第一方面,在第一种可能的实施方式中,所述在所述 TRILL网络组 播发送 MAC撤销指示, 包括:
在所述 TRILL网络中向所述 VLAN的组播树的成员发送终端地址交互 信息 ESADI报文, 所述 ESADI报文中携带所述 AF的信息、 所述 VLAN的信 息和 MAC撤销信息,所述 VLAN的信息包括 VLAN的标签或与所述 VLAN的 标签对应的细化标签 FGL。
在第二方面, 本发明实施例提供了一种路由更新方法, 包括: 在虚拟局域网 VLAN的指定转发者 AF所连的生成树协议 STP网络的拓 扑发生变更时,接收所述 AF发送的 MAC撤销指示,所述 VLAN通过所述 STP 网络接入多链路透明互联 TRILL网络;
根据所述 MAC撤销指示, 清除以所述 AF为入口路由网桥的所述 VLAN 的 MAC地址。
结合第二方面, 在第一种可能的实施方式中, 接收所述 AF发送的 MAC 撤销指示, 包括:
接收所述 AF发送的终端地址交互信息 ESADI报文, 所述 ESADI报文中 携带所述 AF的信息、 所述 VLAN的信息和 MAC撤销信息。 结合第二方面的第一种可能的实施方式, 在第二种可能的实施方式中, 所述根据所述 MAC撤销指示, 清除以所述 AF为入口路由网桥的所述 VLAN 的 MAC地址, 包括:
从所述 ESADI报文中解析得到所述 AF的信息、 所述 VLAN的信息和 MAC撤销信息;
根据所述 AF的信息和所述 VLAN的信息, 查找并清除以所述 AF为入口 路由网桥的所述 VLAN的 MAC地址。
结合第二方面的第二种可能的实施方式, 在第三种可能的实施方式中, 所述 VLAN的信息包括 VLAN的标签或与所述 VLAN的标签对应的细化标签 FGL, 所述根据所述 AF的信息和所述 VLAN的信息, 查找并清除以所述 AF 为入口路由网桥的所述 VLAN的 MAC地址, 包括:
在 MAC地址表中, 查找并清除以所述 AF为入口路由网桥且与所述 VLAN的标签对应的 MAC地址; 或
在 MAC地址表中, 查找并清除以所述 AF为入口路由网桥且与所述 FGL 对应的 MAC地址。
在第三方面, 本发明实施例提供了一种路由设备, 包括:
清除单元, 用于在虚拟局域网 VLAN的指定转发者 AF所连的生成树协 议 STP网络的拓扑发生变更时, 清除所述 AF中以所述 AF为入口路由网桥的 所述 VLAN的 MAC地址, 所述 VLAN通过所述 STP网络接入多链路透明互联 TRII 网络;
发送单元, 用于在所述 TRILL网络组播发送 MAC撤销指示, 所述 MAC 撤销指示用于指示接收者清除以所述 AF为入口路由网桥的所述 VLAN的 MAC地址。
结合第三方面, 在第一种可能的实施方式中, 所述发送单元具体用于 在所述 TRILL网络中向所述 VLAN的组播树的成员发送终端地址交互信息 ESADI报文, 所述 ESADI报文中携带所述 AF的信息、 所述 VLAN的信息和 MAC撤销信息,所述 VLAN的信息包括 VLAN的标签或与所述 VLAN的标签 对应的细化标签 FGL。
在第四方面, 本发明实施例提供了一种路由设备, 包括:
接收单元, 用于在虚拟局域网 VLAN的指定转发者 AF所连的生成树协 议 STP网络的拓扑发生变更时, 接收所述 AF发送的 MAC撤销指示, 所述 VLAN通过所述 STP网络接入多链路透明互联 TRILL网络;
清除单元, 用于根据所述 MAC撤销指示, 清除以所述 AF为入口路由网 桥的所述 VLAN的 MAC地址。
结合第四方面, 在第一种可能的实施方式中, 所述接收单元具体用于 接收所述 AF发送的终端地址交互信息 ESADI报文, 所述 ESADI报文中携带 所述 AF的信息、 所述 VLAN的信息和 MAC撤销信息。
结合第四方面的第一种可能的实施方式, 在第二种可能的实施方式中, 所述清除单元包括:
解析子单元, 用于从所述 ESADI报文中解析得到所述 AF的信息、 所述 VLAN的信息和 MAC撤销信息 ·'
清除子单元, 用于根据所述 AF的信息和所述 VLAN的信息, 查找并清 除以所述 AF为入口路由网桥的所述 VLAN的 MAC地址。
结合第四方面的第二种可能的实施方式, 在第三种可能的实施方式中, 所述 VLAN的信息包括 VLAN的标签或与所述 VLAN的标签对应的细化标签 FGL, 所述清除子单元具体用于:
在 MAC地址表中, 查找并清除以所述 AF为入口路由网桥且与所述 VLAN的标签对应的 MAC地址; 或
在端口信息中查找与所述 VLAN的标签对应的 FGL, 在 MAC地址表中 查找并清除以所述 AF为入口路由网桥且与所述 FGL对应的 MAC地址。 有益效果
本发明实施例在 VLAN通过 STP网络接入 TRILL网络的情况下, 在 VLAN的 AF所连的 STP网络拓扑发生变化时, 除了可以清除所述 AF中以所 述 AF为入口路由网桥的所述 VLAN的 MAC地址之外, 还可以在所述 TRILL 网络组播发送 MAC撤销指示, 以使得接收者如 RB2、 RB3等能够及时清除 以所述 AF为入口路由网桥的所述 VLAN的 MAC地址, 实现 MAC地址的快速 老化, 防止出现流量黑洞, 从而减少数据报文丢失, 降低了丢包率, 改善 TRILL网络性能。
根据下面参考附图对示例性实施例的详细说明, 本发明的其它特征及 方面将变得清楚。
附图说明 包含在说明书中并且构成说明书的一部分的附图与说明书一起示出了 本发明的示例性实施例、 特征和方面, 并且用于解释本发明的原理。
图 la为本发明实施例一的路由更新方法的流程图; 图 lb和图 lc为本发明实施例一的路由更新方法的应用场景图; 图 2a为本发明实施例二的路由更新方法的流程图; 图 2b为本发明实施例二的路由更新方法中 MAC Withdraw TLV的示意 图;
图 3为本发明实施例三的路由更新方法的流程图; 图 4为本发明实施例四的路由更新方法的流程图; 图 5为本发明实施例五的路由设备的结构框图; 图 6为本发明实施例六的路由设备的结构框图;
图 7为本发明实施例七的路由设备的结构框图。
具体实施方式 以下将参考附图详细说明本发明的各种示例性实施例、 特征和方面。 附图中相同的附图标记表示功能相同或相似的元件。 尽管在附图中示出了 实施例的各种方面, 但是除非特别指出, 不必按比例绘制附图。
在这里专用的词"示例性 "意为 "用作例子、实施例或说明性"。这里作为 "示例性"所说明的任何实施例不必解释为优于或好于其它实施例。
另外, 为了更好的说明本发明, 在下文的具体实施方式中给出了众多 的具体细节。 本领域技术人员应当理解, 没有这些具体细节, 本发明同样 可以实施。 在另外一些实例中, 对于大家熟知的方法、 手段、 元件和电路 未作详细描述, 以便于凸显本发明的主旨。
实施例 1
图 la为本发明实施例一的路由更新方法的流程图。如图 la所示,该路由 更新方法可以包括:
歩骤 101、 在虚拟局域网 VLAN的指定转发者 AF所连的生成树协议 STP 网络的拓扑发生变更时, 清除所述 AF中以所述 AF为入口路由网桥的所述 VLAN的 MAC地址, 所述 VLAN通过所述 STP网络接入多链路透明互联 TRII 网络。
例如, 图 lb和图 lc为本发明实施例一的路由更新方法的应用场景图。 在 STP网络和 TRILL网络混合组网的情况下, 主机 H属于 VLAN1。 如图 lb所 示, 主机 H通过 STP网络的交换机可以接入 TRILL网络的路由网桥如 RB1 , 且 RB1为 VLAN1的 AF, 这种情况下, RB1是 VLAN1接入 TRILL网络的入口 (ingress) 路由网桥, TRILL网络的各个路由网桥如 RB1、 RB2、 RB3中存 有以 RB 1为 VLAN1接入 TRILL网络的入口路由网桥学习得到 MAC地址。 如 图 lc所示, VLAN1的 AF参与 STP网络协议的 BPDU (Bridge Protocol Data Unit, 网桥协议数据单元) 交互, 在检测到 VLAN1的 AF所连的 STP网络的 拓扑结构发生变化时,例如: VLAN1接入 TRILL网络的入口路由网桥由 RB1 变成了 RB2, 此时, 虽然 VLANl的 AF所连的 STP网络的拓扑发生变更, 但 RB 1依然是 VLAN1的 AF, 则 RB 1可以清除以 RB1为入口路由网桥的 VLAN1 的 MAC地址。
歩骤 102、在所述 TRILL网络组播发送 MAC撤销指示,所述 MAC撤销指 示用于指示接收者清除以所述 AF为入口路由网桥的所述 VLAN的 MAC地 址。
TRILL网络的其他路由器可能收到该 MAC撤销指示, 接收者如 RB2、 RB3等, 可以清除以 RB1为入口路由网桥的 VL AN1的 MAC地址。
本实施例在 VLAN通过 STP网络接入 TRILL网络的情况下, 在 VLAN的 AF所连的 STP网络拓扑发生变化时, 除了可以清除所述 AF中以所述 AF为入 口路由网桥的所述 VLAN的 MAC地址之外,还可以在所述 TRILL网络组播发 送 MAC撤销指示, 以使得接收者如 RB2、 RB3等能够及时清除以所述 AF为 入口路由网桥的所述 VLAN的 MAC地址, 实现 MAC地址的快速老化, 防止 出现流量黑洞, 从而减少数据报文丢失, 降低了丢包率, 改善 TRILL网络性 能。
实施例 2
TRILL协议中定义了 ESADI ( End Station Address Distribution Information, 终端地址交互信息) 协议。 ESADI协议是一种用于 RB (路由 网桥) 扩散自己所学 MAC地址的协议, 用于在 TRILL的数据层通过组播来 扩散 RB1学习到的 VLAN-x的 MAC地址。图 2a为本发明实施例二的路由更新 方法的流程图。图 2a与图 la标号相同的歩骤具有相同的含义,与上一实施例 的区别主要在于:如图 2a所示,上一实施例的撤销指示可以通过 ESADI报文 来实现,歩骤 102中, AF在所述 TRILL网络组播发送 MAC撤销指示具体可以 包括:
歩骤 201、 在所述 TRILL网络中向所述 VLAN的组播树的成员发送终端 地址交互信息 ESADI报文, 所述 ESADI报文中携带所述 AF的信息、 所述 VLAN的信息和 MAC撤销信息,所述 VLAN的信息包括 VLAN的标签或与所 述 VLAN的标签对应的细化标签 FGL, 该 MAC撤销信息可以采用类型、 长 度、 值 (Type、 Length, Value, TLV) 的格式。
具体地, 本发明实施例中的 MAC撤销信息可以扩展定义 ESADI报文的 MAC撤销 (Withdraw) TLV, 用于反向动作: 清除 VLAN1的以 RB1为入口 RB学习到的 MAC地址 (address)。 VLAN的 AF如 RBI—旦检测到本地 STP 网络拓扑发生变化, 可以构造包括 MAC Withdraw TLV的 ESADI报文, 并向 TRILL网络中该 VLAN组播树的成员 RB发送该 ESADI报文, 用于清空以该 RB 1为 AF的 VLAN1的 MAC地址。
此外, TRILL网络中其他 RB如 RB2、 RB3在收到包含该 MAC Withdraw TLV的 ESADI报文后, 可以解析获取 AF (如 RBI ) 和 VLAN1的信息, 依据 该信息, 查询各自的本地 MAC地址表, 将 MAC地址表中保存的以 RB1为 AF 的 VLAN1的所有 MAC地址清除。
其中, 目前 TRILL扩展了 FGL (Fine Grained Labeling, 细化标签), 用 于支持更多的租户。 FGL可以在入口 RB的端口进行配置,完成 VLAN到 FGL 的映射。 本发明实施例可以通过查询这些端口信息来确定 ESADI报文中相 应字段 FGL的取值。
图 2b为本发明实施例二的路由更新方法中 MAC Withdraw TLV的示意 图, 如图 2b所示, 与 ESADI-LSP之定义了 MAC Reachability TLV不同, 本发 明实施例中可以采用 MAC Withdraw TLV。 其中, Type=MAC-WD (MAC Withdraw ) 是指该信息的类型, Length是指该信息 Value部分的长度, Confidence是指由发送者 RB决定的该消息的 "置信度"。 这三个参数都可以 为 1个字节 (byte)。
需要清除 MAC地址的数据标签 (Data Label) 如 VLAN的标签或 FGL, 从 ESADI报文的固有头部可以读取相应字段 VLAN的标签或 FGL, 例如: [draft-ietf-trill-esadi-02]。 AF在构造该包含该 MAC Withdraw TLV的 ESADI报 文时, 可以直接根据 VLAN的标签构造, 也可以查找本地 VLAN与 FGL的映 射关系来确定 FGL的取值。 其中, VLAN和 FGL的映射关系受到本地拓扑变 化影响。 远端 RB如 RB2、 RB3收到该 MAC Withdraw TLV可以将 VLAN的标 签对应的 MAC地址清除, 或者将 FGL对应的 MAC地址清除。
后续, 通过 TRILL数据报文的转发, TRILL网络的 RB可以学习到以正 确的 RB (如 RB2) 为入口路由器的 MAC地址。
本实施例在 VLAN通过 STP网络接入 TRILL网络的情况下, 在 VLAN的 AF所连的 STP网络的拓扑发生变更时, 除了可以清除所述 AF中以所述 AF为 入口路由网桥的所述 VLAN的 MAC地址之外,还可以在所述 TRILL网络通过 ESADI报文组播发送 MAC撤销指示, 以使得接收者如 RB2、 RB3等能够及时 清除以所述 AF为入口路由网桥的所述 VLAN的 MAC地址, 实现 MAC地址的 快速老化, 防止出现流量黑洞, 从而减少数据报文丢失, 降低了丢包率, 改善 TRILL网络性能。
实施例 3
图 3为本发明实施例三的路由更新方法的流程图。 如图 3所示, 该路由 更新方法可以包括:
歩骤 301、 在虚拟局域网 VLAN的指定转发者 AF所连的生成树协议 STP 网络的拓扑发生变更时, 接收所述 AF发送的 MAC撤销指示, 所述 VLAN通 过所述 STP网络接入多链路透明互联 TRILL网络。
参见图 lb和图 lc, 在 STP网络和 TRILL网络混合组网的情况下, 主机 H 属于 VLAN1。 如图 lb所示, 主机 H通过 STP网络的交换机可以接入 TRILL网 络的路由网桥如 RB1 , 且 RB1为 VLAN1的 AF, 这种情况下, RB1是 VLAN1 接入 TRILL网络的入口 (ingress) 路由网桥, TRILL网络的各个路由网桥如 RB1、 RB2、 RB3中存有以 RBI为 VLANl接入 TRILL网络的入口路由网桥学 习得到 MAC地址。 如图 lc所示, VLAN1的 AF参与 STP网络协议的 BPDU交 互, 在检测到 STP网络的拓扑结构发生变化时, 例如: VLAN1接入 TRILL 网络的入口路由网桥由 RBI变成了 RB2,此时,虽然 VLAN1的 AF所连的 STP 网络的拓扑发生变更, 但 RB1依然是 VLAN1的 AF, 则 RBI可以清除以 RBI 为入口路由网桥的 VLAN1的 MAC地址。 RB1在 TRILL网络组播发送 MAC撤 销指示后, TRILL网络的其他路由网桥如 RB2、 RB3等可以收到该 MAC撤销 指示。
歩骤 302、 根据所述 MAC撤销指示, 清除以所述 AF为入口路由网桥的 所述 VLAN的 MAC地址。
参见图 lb和图 lc,如果 RB2收到该 MAC撤销指示,可以清除以 RB1为入 口路由网桥的 VLAN1的 MAC地址。
本实施例在 VLAN通过 STP网络接入 TRILL网络的情况下, 在 VLAN的 AF所连的 STP网络拓扑发生变更时, 如果接收者如 RB2、 RB3收到 AF在所 述 TRILL网络组播发送 MAC撤销指示, 能够及时清除自身保存的以所述 AF 为入口路由网桥的所述 VLAN的 MAC地址, 实现 MAC地址的快速老化, 防 止出现流量黑洞, 从而减少数据报文丢失, 降低了丢包率, 改善 TRILL网络 性能。
实施例 4
图 4为本发明实施例四的路由更新方法的流程图。 图 4与图 3标号相同的 歩骤具有相同的含义, 与上一实施例的区别主要在于: 如图 4所示, 上一实 施例的歩骤 301中, 接收所述 AF发送的 MAC撤销指示, 具体可以包括: 歩骤 401、接收所述 AF发送的 ESADI报文, 所述 ESADI报文中携带所述 AF的信息、 所述 VLAN的信息和 MAC撤销信息。
其中, VLAN的 AF如 RB1—旦检测到本地 STP网络拓扑发生变化, 可以 构造包括 MAC Withdraw TLV的 ESADI报文, 并向 TRILL网络中该 VLAN组 播树的成员 RB发送该 ESADI报文。 VLAN组播树的成员 RB如 RB2、 RB3可 以接收到 AF发送的 ESADI报文。 ESADI报文的内容可以参见实施例二和图 2b的相关描述。
上一实施例的歩骤 302中, 根据所述 MAC撤销指示, 清除以所述 AF为 入口路由网桥的所述 VLAN的 MAC地址, 具体可以包括:
歩骤 402、 从所述 ESADI报文中解析得到所述 AF的信息、 所述 VLAN的 信息和 MAC撤销消息;
歩骤 403、 根据所述 AF的信息和所述 VLAN的信息, 查找并清除以所述 AF为入口路由网桥的所述 VLAN的 MAC地址。
其中, 所述 VLAN的信息可以包括 VLAN的标签或与所述 VLAN的标签 对应的细化标签 FGL, 歩骤 403具体可以包括以下任意方式:
方式一、 在 MAC地址表中, 查找并清除以所述 AF为入口路由网桥且与 所述 VLAN的标签对应的 MAC地址。
具体地,如果 RB收到的 ESADI报文中解析得到的 VLAN的信息为 VLAN 的标签, 并解析得到 AF的信息如 RB1为入口路由网桥, 可以直接在 RB的 MAC地址表中, 查找以所述 AF为入口路由网桥且与所述 VLAN的标签对应 的 MAC地址, 查找到的 MAC地址可能不存在, 也可能是一条或多条, 将所 有查找到的 MAC地址都清除。
方式二、 在端口信息中查找与所述 VLAN的标签对应的 FGL, 在 MAC 地址表中查找并清除以所述 AF为入口路由网桥且与所述 FGL对应的 MAC 地址。
具体地,如果 RB收到的 ESADI报文中解析得到的 VLAN的信息为 VLAN 的标签对应的 FGL, 并解析得到 AF的信息如 RBI为入口路由网桥, 可以直 接在 RB的 MAC地址表中,查找以所述 AF为入口路由网桥且与所述 FGL对应 的 MAC地址, 查找到的 MAC地址可能不存在, 也可能是一条或多条, 将所 有查找到的 MAC地址都清除。
本实施例在 VLAN通过 STP网络接入 TRILL网络的情况下, 在 VLAN的 AF所连的 STP网络拓扑发生变更时, 如果接收者如 RB2、 RB3收到 AF在所 述 TRILL网络组播发送 MAC撤销指示, 能够及时清除自身保存的以所述 AF 为入口路由网桥的所述 VLAN的 MAC地址, 实现 MAC地址的快速老化, 防 止出现流量黑洞, 从而减少数据报文丢失, 降低了丢包率, 改善 TRILL网络 性能。
实施例 5
图 5为本发明实施例五的路由设备的结构框图, 如图 5所示, 该路由设 备可以包括:
清除单元 51, 用于在虚拟局域网 VLAN的指定转发者 AF所连的生成树 协议 STP网络的拓扑发生变更时, 清除所述 AF中以所述 AF为入口路由网桥 的所述 VLAN的 MAC地址, 所述 VLAN通过所述 STP网络接入多链路透明互 联 TRILL网络;
发送单元 53,用于在所述 TRILL网络组播发送 MAC撤销指示,所述 MAC 撤销指示用于指示接收者清除以所述 AF为入口路由网桥的所述 VLAN的 MAC地址。
具体地,参见图 lb和图 lc,在 STP网络和 TRILL网络混合组网的情况下, 主机 H属于 VLAN1。 如图 lb所示, 主机 H通过 STP网络的交换机可以接入 TRILL网络的路由网桥如 RB1 , 且 RB1为 VLAN1的 AF, 这种情况下, RB1 是 VLAN1接入 TRILL网络的入口 (ingress)路由网桥, TRILL网络的各个路 由设备如 RB1、 RB2、 RB3中存有以 RBI为 VLAN1接入 TRILL网络的入口路 由网桥学习得到 MAC地址。在检测到 VLAN1的 AF所连的 STP网络的拓扑结 构发生变化时, 路由设备的清除单元 51可以清除 AF中以所述 AF为入口路由 网桥的所述 VLAN的 MAC地址; 发送单元 53可以在 TRILL网络组播发送 MAC撤销指示, 以使得接收者清除以所述 AF为入口路由网桥的所述 VLAN 的 MAC地址。
在一种可能的实施方式中,发送单元 53具体可以用于在所述 TRILL网络 中向所述 VLAN的组播树的成员发送终端地址交互信息 ESADI报文, 所述 ESADI报文中携带所述 AF的信息、 所述 VLAN的信息和 MAC撤销信息, 所 述 VLAN的信息包括 VLAN的标签或与所述 VLAN的标签对应的细化标签 FGL。 其中, ESADI报文的内容可以参见实施例二和图 2b的相关描述。
本实施例在 VLAN通过 STP网络接入 TRILL网络的情况下, 在 VLAN的 AF所连的 STP网络拓扑发生变化时, 清除单元除了可以清除所述 AF中以所 述 AF为入口路由网桥的所述 VLAN的 MAC地址之外, 发送单元还可以在所 述 TRILL网络组播发送 MAC撤销指示, 以使得接收者如 RB2、 RB3等能够及 时清除以所述 AF为入口路由网桥的所述 VLAN的 MAC地址, 实现 MAC地址 的快速老化, 防止出现流量黑洞, 从而减少数据报文丢失, 降低了丢包率, 改善 TRILL网络性能。
实施例 6
图 6为本发明实施例六的路由设备的结构框图, 如图 6所示, 该路由设 备可以包括:
接收单元 61, 用于在虚拟局域网 VLAN的指定转发者 AF所连的生成树 协议 STP网络的拓扑发生变更时, 接收所述 AF发送的 MAC撤销指示, 所述 VLAN通过所述 STP网络接入多链路透明互联 TRILL网络;
清除单元 63, 用于根据所述 MAC撤销指示, 清除以所述 AF为入口路由 网桥的所述 VLAN的 MAC地址。
具体地,参见图 lb和图 lc,在 STP网络和 TRILL网络混合组网的情况下, 主机 H属于 VLAN1。 如图 lb所示, 主机 H通过 STP网络的交换机可以接入 TRILL网络的路由网桥如 RB1, 且 RBI为 VLANl的 AF, 这种情况下, RBI 是 VLANl接入 TRILL网络的入口 (ingress)路由网桥, TRILL网络的各个路 由网桥如 RB1、 RB2、 RB3中存有以 RBI为 VLANl接入 TRILL网络的入口路 由网桥学习得到 MAC地址。在检测到 VLAN1的 AF所连的 STP网络的拓扑结 构发生变化时, 路由设备的接收单元 61可以接收到所述 AF发送的 MAC撤销 指示; 清除单元 63可以根据所述 MAC撤销指示, 清除以所述 AF为入口路由 网桥的所述 VL AN的 MAC地址。
在一种可能的实施方式中, 所述接收单元 61具体可以用于接收所述 AF 发送的 ESADI报文, 所述 ESADI报文中携带所述 AF的信息、 所述 VLAN的 信息和 MAC撤销信息。
在一种可能的实施方式中, 清除单元 63可以包括:
解析子单元 631, 用于从所述 ESADI报文中解析得到所述 AF的信息、所 述 VLAN的信息和 MAC撤销信息; 其中, ESADI报文的内容可以参见实施 例二和图 2b的相关描述。
清除子单元 633, 用于根据所述 AF的信息和所述 VLAN的信息, 查找并 清除以所述 AF为入口路由网桥的所述 VLAN的 MAC地址。
在一种可能的实施方式中, 所述 VLAN的信息包括 VLAN的标签或与所 述 VLAN的标签对应的细化标签 FGL, 所述清除子单元 633具体用于:
在 MAC地址表中, 查找并清除以所述 AF为入口路由网桥且与所述 VLAN的标签对应的 MAC地址; 或
在端口信息中查找与所述 VLAN的标签对应的 FGL, 在 MAC地址表中 查找并清除以所述 AF为入口路由网桥且与所述 FGL对应的 MAC地址。
本实施例在 VLAN通过 STP网络接入 TRILL网络的情况下, 在 VLAN的 AF所连的 STP网络拓扑发生变更时, 如果路由设备如 RB2、 RB3的接收单元 收到 AF在所述 TRILL网络组播发送 MAC撤销指示, 清除单元能够及时清除 自身保存的以所述 AF为入口路由网桥的所述 VLAN的 MAC地址, 实现 MAC 地址的快速老化, 防止出现流量黑洞, 从而减少数据报文丢失, 降低了丢 包率, 改善 TRILL网络性能。
实施例 7
图 7为本发明实施例七的路由设备的结构框图。所述路由设备可以是具 备计算能力的主机服务器、 个人计算机 PC、 或者可携带的便携式计算机或 终端等。 本发明具体实施例并不对计算节点的具体实现做限定。
所述路由设备包括处理器 (processor)1110、 通信接口(Communications Interface)1120、 存储器 (memory array)l 130和总线 1140。 其中, 处理器 1110、 通信接口 1120、 以及存储器 1130通过总线 1140完成相互间的通信。
通信接口 1120用于与网元通信, 其中网元包括例如虚拟机管理中心、 共享存储等。
处理器 1110用于执行程序。处理器 1110可能是一个中央处理器 CPU, 或 者是专用集成电路 ASIC (Application Specific Integrated Circuit), 或者是被 配置成实施本发明实施例的一个或多个集成电路。
存储器 1130用于存放文件。 存储器 1130可能包含高速 RAM存储器, 也 可能还包括非易失性存储器 (non-volatile memory), 例如至少一个磁盘存储 器。 存储器 1130也可以是存储器阵列。 存储器 1130还可能被分块, 并且所 述块可按一定的规则组合成虚拟卷。
在一种可能的实施方式中, 上述程序可为包括计算机操作指令的程序 代码。 该程序具体可用于:
在虚拟局域网 VLAN的指定转发者 AF所连的生成树协议 STP网络的拓 扑发生变更时, 清除所述 AF中以所述 AF为入口路由网桥的所述 VLAN的 MAC地址, 所述 VLAN通过所述 STP网络接入多链路透明互联 TRILL网络; 在所述 TRILL网络组播发送 MAC撤销指示, 所述 MAC撤销指示用于指 示接收者清除以所述 AF为入口路由网桥的所述 VLAN的 MAC地址。
在一种可能的实施方式中, 所述在所述 TRILL网络组播发送 MAC撤销 指示, 包括:
在所述 TRILL网络中向所述 VLAN的组播树的成员发送终端地址交互 信息 ESADI报文, 所述 ESADI报文中携带所述 AF的信息、 所述 VLAN的信 息和 MAC撤销信息,所述 VLAN的信息包括 VLAN的标签或与所述 VLAN的 标签对应的细化标签 FGL。
该程序具体还可用于: 在虚拟局域网 VLAN的指定转发者 AF所连的生 成树协议 STP网络的拓扑发生变更时, 接收所述 AF发送的 MAC撤销指示, 所述 VLAN通过所述 STP网络接入多链路透明互联 TRILL网络;
根据所述 MAC撤销指示, 清除以所述 AF为入口路由网桥的所述 VLAN 的 MAC地址。
在一种可能的实施方式中, 接收所述 AF发送的 MAC撤销指示, 包括: 接收所述 AF发送的 ESADI报文, 所述 ESADI报文中携带所述 AF的信 息、 所述 VLAN的信息和 MAC撤销信息。
在一种可能的实施方式中, 所述根据所述 MAC撤销指示, 清除以所述 AF为入口路由网桥的所述 VLAN的 MAC地址, 包括:
从所述 ESADI报文中解析得到所述 AF的信息、 所述 VLAN的信息和 MAC撤销信息;
根据所述 AF的信息和所述 VLAN的信息, 查找并清除以所述 AF为入口 路由网桥的所述 VLAN的 MAC地址。
在一种可能的实施方式中, 所述 VLAN的信息包括 VLAN的标签或与所 述 VLAN的标签对应的细化标签 FGL,所述根据所述 AF的信息和所述 VLAN 的信息, 查找并清除以所述 AF为入口路由网桥的所述 VLAN的 MAC地址, 包括: 在 MAC地址表中, 查找并清除以所述 AF为入口路由网桥且与所述 VLAN的标签对应的 MAC地址; 或 在 MAC地址表中, 查找并清除以所述 AF为入口路由网桥且与所述 FGL 对应的 MAC地址。 本领域普通技术人员可以意识到, 本文所描述的实施例中的各示例性 单元及算法歩骤, 能够以电子硬件、 或者计算机软件和电子硬件的结合来 实现。 这些功能究竟以硬件还是软件形式来实现, 取决于技术方案的特定 应用和设计约束条件。 专业技术人员可以针对特定的应用选择不同的方法 来实现所描述的功能, 但是这种实现不应认为超出本发明的范围。 如果以计算机软件的形式来实现所述功能并作为独立的产品销售或使 用时, 则在一定程度上可认为本发明的技术方案的全部或部分 (例如对现 有技术做出贡献的部分) 是以计算机软件产品的形式体现的。 该计算机软 件产品通常存储在计算机可读取的存储介质中, 包括若干指令用以使得计 算机设备 (可以是个人计算机、 服务器、 或者网络设备等) 执行本发明各 实施例方法的全部或部分歩骤。 而前述的存储介质包括 U盘、 移动硬盘、 只 读存储器 (ROM, Read-Only Memory )、 随机存取存储器 (RAM, Random
Access Memory), 磁碟或者光盘等各种可以存储程序代码的介质。
以上所述, 仅为本发明的具体实施方式, 但本发明的保护范围并不局 限于此, 任何熟悉本技术领域的技术人员在本发明揭露的技术范围内, 可 轻易想到变化或替换, 都应涵盖在本发明的保护范围之内。 因此, 本发明 的保护范围应所述以权利要求的保护范围为准。

Claims

权利要求
1、 一种路由更新方法, 其特征在于, 包括:
在虚拟局域网 VLAN的指定转发者 AF所连的生成树协议 STP网络的拓 扑发生变更时, 清除所述 AF中以所述 AF为入口路由网桥的所述 VLAN的 MAC地址, 所述 VLAN通过所述 STP网络接入多链路透明互联 TRILL网络; 在所述 TRILL网络组播发送 MAC撤销指示, 所述 MAC撤销指示用于指 示接收者清除以所述 AF为入口路由网桥的所述 VLAN的 MAC地址。
2、根据权利要求 1所述的路由更新方法,其特征在于,所述在所述 TRILL 网络组播发送 MAC撤销指示, 包括:
在所述 TRILL网络中向所述 VLAN的组播树的成员发送终端地址交互 信息 ESADI报文, 所述 ESADI报文中携带所述 AF的信息、 所述 VLAN的信 息和 MAC撤销信息,所述 VLAN的信息包括 VLAN的标签或与所述 VLAN的 标签对应的细化标签 FGL。
3、 一种路由更新方法, 其特征在于, 包括:
在虚拟局域网 VLAN的指定转发者 AF所连的生成树协议 STP网络的拓 扑发生变更时,接收所述 AF发送的 MAC撤销指示,所述 VLAN通过所述 STP 网络接入多链路透明互联 TRILL网络;
根据所述 MAC撤销指示, 清除以所述 AF为入口路由网桥的所述 VLAN 的 MAC地址。
4、 根据权利要求 3所述的路由更新方法, 其特征在于, 所述接收所述 AF发送的 MAC撤销指示, 包括:
接收所述 AF发送的终端地址交互信息 ESADI报文, 所述 ESADI报文中 携带所述 AF的信息、 所述 VLAN的信息和 MAC撤销信息。
5、 根据权利要求 4所述的路由更新方法, 其特征在于, 所述根据所述 MAC撤销指示, 清除以所述 AF为入口路由网桥的所述 VLAN的 MAC地址, 包括:
从所述 ESADI报文中解析得到所述 AF的信息、 所述 VLAN的信息和 MAC撤销信息;
根据所述 AF的信息和所述 VLAN的信息, 查找并清除以所述 AF为入口 路由网桥的所述 VLAN的 MAC地址。
6、 根据权利要求 5所述的路由更新方法, 其特征在于, 所述 VLAN的信 息包括 VLAN的标签或与所述 VLAN的标签对应的细化标签 FGL, 所述根据 所述 AF的信息和所述 VLAN的信息, 查找并清除以所述 AF为入口路由网桥 的所述 VLAN的 MAC地址, 包括:
在 MAC地址表中, 查找并清除以所述 AF为入口路由网桥且与所述 VLAN的标签对应的 MAC地址; 或
在 MAC地址表中, 查找并清除以所述 AF为入口路由网桥且与所述 FGL 对应的 MAC地址。
7、 一种路由设备, 其特征在于, 包括:
清除单元, 用于在虚拟局域网 VLAN的指定转发者 AF所连的生成树协 议 STP网络的拓扑发生变更时, 清除所述 AF中以所述 AF为入口路由网桥的 所述 VLAN的 MAC地址, 所述 VLAN通过所述 STP网络接入多链路透明互联 TRII 网络;
发送单元, 用于在所述 TRILL网络组播发送 MAC撤销指示, 所述 MAC 撤销指示用于指示接收者清除以所述 AF为入口路由网桥的所述 VLAN的 MAC地址。
8、 根据权利要求 7所述的路由设备, 其特征在于, 所述发送单元具体 用于在所述 TRILL网络中向所述 VLAN的组播树的成员发送终端地址交互 信息 ESADI报文, 所述 ESADI报文中携带所述 AF的信息、 所述 VLAN的信 息和 MAC撤销信息,所述 VLAN的信息包括 VLAN的标签或与所述 VLAN的 标签对应的细化标签 FGL。
9、 一种路由设备, 其特征在于, 包括:
接收单元, 用于在虚拟局域网 VLAN的指定转发者 AF所连的生成树协 议 STP网络的拓扑发生变更时, 接收所述 AF发送的 MAC撤销指示, 所述 VLAN通过所述 STP网络接入多链路透明互联 TRILL网络;
清除单元, 用于根据所述 MAC撤销指示, 清除以所述 AF为入口路由网 桥的所述 VLAN的 MAC地址。
10、 根据权利要求 9所述的路由设备, 其特征在于, 所述接收单元具体 用于接收所述 AF发送的终端地址交互信息 ESADI报文, 所述 ESADI报文中 携带所述 AF的信息、 所述 VLAN的信息和 MAC撤销信息。
11、 根据权利要求 10所述的路由设备, 其特征在于, 所述清除单元包 括:
解析子单元, 用于从所述 ESADI报文中解析得到所述 AF的信息、 所述 VLAN的信息和 MAC撤销信息 ·'
清除子单元, 用于根据所述 AF的信息和所述 VLAN的信息, 查找并清 除以所述 AF为入口路由网桥的所述 VLAN的 MAC地址。
12、 根据权利要求 11所述的路由设备, 其特征在于, 所述 VLAN的信息 包括 VLAN的标签或与所述 VLAN的标签对应的细化标签 FGL, 所述清除子 单元具体用于:
在 MAC地址表中, 查找并清除以所述 AF为入口路由网桥且与所述
VLAN的标签对应的 MAC地址; 或
在端口信息中查找与所述 VLAN的标签对应的 FGL, 在 MAC地址表中 查找并清除以所述 AF为入口路由网桥且与所述 FGL对应的 MAC地址。
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