CN104601472A - Chip VXLAN gateway distributed routing implementation method and message processing system - Google Patents
Chip VXLAN gateway distributed routing implementation method and message processing system Download PDFInfo
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Abstract
The invention discloses a chip VXLAN gateway distributed routing implementation method. The method includes allowing a VXLAN gateway to match the targeted MAC address and VLAN information of received messages with internal matching tables, and determining whether routing query is performed in a forced manner or not according to the matching result; if the routing query is performed and the routing is queried, sealing the corresponded VXLAN head on the messages, and performing routing forwarding on the sealed massage; if the routing query is omitted, performing secondary MAC table query on the messages, and performing a secondary forwarding procedure according to the query result; if the routing query is performed but the routing is not queried, forwarding the messages with a VXLAN tunnel head acquired by matching result with the matching tables to the VXLAN gateway of routing equipment according to outlet action. The invention further provides a message processing system on the basis of the VXLAN gateway. The pressure and performance requirements on external routing equipment are lowered, the transverse routing flow of a virtual data center can be forwarded along an optimal path, and the consumption of the entire bandwidth of the data center is reduced.
Description
Technical field
The present invention relates to data center virtualization application, especially relate to a kind of method and the message handling system that realize the distributed route of VXLAN gateway in the chips.
Background technology
VXLAN (Virtual Extensible Local Area Network, virtual easily extensible local area network (LAN)) protocol definition one is at four layer protocol UDP (User Datagram Protocol, User Datagram Protocol) on double layer network framework, and the double layer network realizing upper strata forwards the isolation in territory, is mainly used in the virtual of data center.
As shown in Figure 1, in virtualized data center, physical server is virtualized into multiple stage virtual machine (VM).As shown in Figure 2, the data packet flow of virtual machine is when going out physical server network interface card, and can be coupled with the tunnel encapsulation of " outer MAC head+outer IP head+VXLAN head ", concrete message format as shown in Figure 3.
When physical equipment will be linked in virtualized network, just need to use VXLAN gateway, VXLAN gateway can be provided as the function that particular flow rate encapsulates specific VXLAN tunnel header.The functional entity adding VXLAN encapsulation reconciliation VXLAN encapsulation is called VTEP (VXLAN TunnelingEnd Point, VXLAN tunnel destination node), and it may be positioned on VXLAN gateway, also may be positioned at and support the virtualized server internal of VXLAN.
VXLAN agreement upwards provides virtual two layers and forwards territory, but in the data-center applications of reality, there is the L 3 virtual flow forwarding territory across virtual two layers.Such as, there are two virtual subnets in same tenant, and need to intercom mutually between two virtual subnets.When virtual machine needs to do three layers of traffic forwarding time, may there is a virtual gateway in each virtual network segment.In virtualized environment, each virtual gateway is independently of each other, and that is, two virtual gateways may belong to diverse three layers and forward territory, and their virtual mac address also may be different.When VXLAN gateway does not support virtual three layers of forwarding capability, usually pass through at the special routing device of VXLAN gateway down-hanging one, such as run the equipment of OpenStack, all virtual gateway functions are all integrated on this equipment.
As shown in Figure IV, if network segment 1.1.1.0/24 and network segment 1.1.2.0/24 is two subnets of same user, be encapsulated in respectively in VXLAN network identifier VNI100 and VNI200.If the communication of this network segment, the VXLAN gateway device with VTEP function only needs to add corresponding VXLAN head to message on the basis of two layers of forwarding.If but want cross-network segment communicating, such as, PC1 will communicate with virtual machine VM1, because cross-network segment needs route, when VXLAN gateway device does not support cross-network segment communicating, can only hang a routing device under VXLAN gateway device, the flow of all cross-network segments first mails to this routing device, after searching routing table, mail to destination.And it should be noted that gateway 1.1.1.254 and 1.1.2.254 of the virtual network on routing device can use different virtual flow-line MAC Address usually.
So, routing device carries out centralized forwarding to route, and load will be very large.And once failure of routing equipment, all East and West direction communication flowss in Visualized data centre cannot carry out three layers of forwarding.
Summary of the invention
The object of the invention is to the defect overcoming prior art, a kind of method and the message handling system that realize the distributed route of VXLAN gateway are in the chips provided, by arranging distributed route on VXLAN gateway, the part routing function that originally should carry out on routing device is transferred on VXLAN gateway, to reduce the load of external routes equipment.
For achieving the above object, the present invention proposes following technical scheme: a kind of method realizing the distributed route of VXLAN gateway in the chips, comprises the following steps:
The default route outlet information of same user's different sub-network, routing iinformation and exchange outlet information are configured to VXLAN gateway by S1, SDN control end, and corresponding corresponding matching list, routing table and the MAC of generating shows respectively;
S2, the described matching list of the target MAC (Media Access Control) address of the message received and vlan information and its inside matches by described VXLAN gateway, if match, obtain carrying out VXLAN encapsulation and mail to the outlet action of routing device, but do not perform this outlet action and proceed described routing table lookup, entering step S3; If described matching list does not match, then enter step S4;
S3, if match respective entries in described routing table, then described message is encapsulated the VXLAN head of upper place, route destination VXLAN network identifier VNI and VXLAN tunnel destination node VTEP and the message after described encapsulation is carried out routing forwarding, the process on VXLAN gateway leaves it at that; If do not match in described routing table, then enter step S5;
S4, message is walked two layers of forwarding process to carry out two layers of described MAC table and search, by lookup result clean culture or broadcast, if destination is not under this VXLAN gateway, then by target MAC (Media Access Control) address place VTEP and the VNI packaging V XLAN head of described message, if destination is under this VXLAN gateway, then directly carry out two layers of forwarding, the process on VXLAN gateway leaves it at that;
S5, forwarded by described outlet action by message, by described routing device place VTEP and VNI packaging V XLAN head, and mail to described routing device, the process on VXLAN gateway leaves it at that.
Preferably, the virtual mac address of described same user's different sub-network gateway is also different.
Preferably, each described subnet adopts VLAN ID mark, and described user adopts VRF ID to identify, and described user VRF ID is mapped by described subnet VLAN ID and gets, and the described VLAN ID of the different sub-network of same user is mapped to same described VRF ID.
Preferably, described matching list uses MAC Address to add VLAN and searches, and the MAC Address in described matching list configuration entry is virtual gateway address; Described routing table uses IP destination address IPDA to add VRF ID and searches; Described MAC table uses MACDA to add VLAN ID and searches.
Another object of the present invention is also, provides a kind of message handling system based on VXLAN gateway, comprises data center, SDN control end, source physical equipment, object virtual machine, VXLAN gateway and routing device,
SDN control end is used for the default route outlet information of same user's different sub-network, routing iinformation and exchange outlet information to be configured to VXLAN gateway, respectively corresponding generation corresponding matching list, routing table and MAC table;
The message that described VXLAN gateway is sent for receiving described source physical equipment, and the described matching list of the target MAC (Media Access Control) address of described message and vlan information and its inside is matched, if the result of matching, then determine a forwarding behavior sending to described routing device according to matching result, and determine to carry out described routing table lookup; If match result according to described routing table, then send to described object virtual machine by route searching result by after upper for message encapsulation corresponding VXLAN head; If carried out described routing table lookup, but do not matched result, then send to described routing device by the matching result of described matching list by after upper for message encapsulation corresponding VXLAN head; If matching list does not match result, then show lookup result by described MAC and carry out Layer2 switching forwarding.
The physical equipment at described object virtual machine place is used for the message that decapsulation is sended over by described VXLAN gateway, and described object virtual machine is for receiving the message after decapsulation;
Described routing device searches next step outlet less than the message of coupling route entry and editor's action for determining in described routing table.
Preferably, if match result according to described routing table, then described message encapsulated the VXLAN head of upper place, route destination VXLAN network identifier VNI and VXLAN tunnel destination node VTEP and the message after described encapsulation carried out routing forwarding to described object virtual machine; If do not match result in matching list, then message is carried out described MAC table to search, by lookup result clean culture or broadcast, if destination is not under this VXLAN gateway, then carry out Layer2 switching forwarding by after the target MAC (Media Access Control) address place VTEP of described message and VNI packaging V XLAN head, export as common Ethernet interface or VXLAN tunnel.
Preferably, described SDN control end is also for being the localized routing in data center by the overall route of described data center and the external routing information route be configured on described routing device on VXLAN gateway, and the route on routing device comprises the route of entire data centre grade and the route of data center outside.
The invention has the beneficial effects as follows:
1, the VXLAN gateway of the present invention in the data in the virtual deployment of the heart arranges distributed route, the part routing function that originally should carry out on routing device is transferred on VXLAN gateway, greatly reduce pressure and the performance requirement of external routes equipment, and the East and West direction routing traffic in Visualized data centre can be forwarded by optimal path, reduce the consumption of the overall bandwidth of data center.
2, support of the present invention carries out distributed route based on the route MAC Address of virtual gateway, and on the deployment way of virtual route, flexibility is very high.
3, the present invention allows the route MAC Address of different virtual gateway different, and the actual virtual mac address number supported only is limited to the size of coupling table of articles, and the route MAC Address number supported with actual physical device has nothing to do.
Accompanying drawing explanation
Fig. 1 is the principle schematic of existing virtualized data center;
Fig. 2 is the principle schematic that the data packet flow of existing virtual machine goes out physical server network interface card;
Fig. 3 is the message format schematic diagram that the data packet flow of existing virtual machine goes out physical server network interface card;
Fig. 4 is the principle schematic of existing virtualized data center cross-network segment communicating;
Fig. 5 is the principle schematic of the virtualized data center based on VXLAN gateway of the present invention;
Fig. 6 is the schematic flow sheet that the present invention realizes the method for the distributed route of VXLAN gateway in the chips.
Embodiment
Below in conjunction with accompanying drawing of the present invention, clear, complete description is carried out to the technical scheme of the embodiment of the present invention.
As shown in Figure 5, physical equipment PC1 and virtual machine VM1 is in the same network segment 1, and physical equipment PC2 and virtual machine VM2 is in the same network segment 2, and the network segment 1 and the network segment 2 are two subnets of same user.Suppose that the network segment 1 is 100 at the upper corresponding VLANID of VTEP1 place equipment (i.e. VXLAN gateway 1), the VLAN ID of the network segment 2 correspondence is 200.Adopt VRF ID to indicate user, VRFID can be mapped by native vlan ID and get, assuming that native vlan 100 and VLAN 200 are all mapped to VRF 1000.
As shown in Figure 6, the present invention realizes the method for distributed route on VXLAN gateway, and for VTEP1 place equipment, concrete steps are as follows:
The default route outlet information of same user's different sub-network, routing iinformation and exchange outlet information are configured to VXLAN gateway 1 by S1, SDN control end, and corresponding corresponding matching list, routing table and the MAC of generating shows respectively; SDN control end is also for being the localized routing in data center by the overall route of data center and the external routing information route be configured on routing device on VXLAN gateway, and the route on routing device comprises the route of entire data centre grade and the route of data center outside.
Wherein, matching list uses MAC Address to add VLAN and searches, and the MAC Address in matching list configuration entry is virtual gateway address; Routing table uses IP destination address IPDA to add VRF ID and searches; MAC table uses MACDA to add VLAN ID and searches.
The matching list of the target MAC (Media Access Control) address of the message received and vlan information and its inside matches, if match by S2, VXLAN gateway, obtain carrying out VXLAN encapsulation and mail to the outlet action of routing device, but do not perform this outlet action, and proceed routing table lookup, enter step S3; If described matching list does not match, then enter step S4;
S3, if match respective entries in the routing table, then message is encapsulated the VXLAN head of upper place, route destination VXLAN network identifier VNI and VXLAN tunnel destination node VTEP and the message after encapsulation is carried out routing forwarding, the process on VXLAN gateway leaves it at that; If do not match in the routing table, then enter step S5;
S4, message is walked two layers of forwarding process to carry out layer two MAC table and search, by lookup result clean culture or broadcast, if destination is not under this VXLAN gateway, then press target MAC (Media Access Control) address place VTEP and the VNI packaging V XLAN head of message, if destination is under this VXLAN gateway, then directly carry out two layers of forwarding, the process on VXLAN gateway leaves it at that;
S5, forwarded by outlet action by message, by routing device place VTEP and VNI packaging V XLAN head, and mail to routing device, the process on VXLAN gateway leaves it at that.
Embodiment 1:
When physical equipment PC1 in the network segment 1 will communicate with the virtual machine VM2 in the network segment 2, i.e. cross-network segment communicating.First, physical equipment PC1 sends IP message to VTEP1 place equipment, if the target MAC (Media Access Control) address of IP message is 0001.0001.0001, VLAN be 100, IP destination address IPDA is 1.1.2.2, mails to virtual machine VM2.
After VTEP1 place equipment receives IP message, search in matching list by the matched rule of " target MAC (Media Access Control) address+vlan information ", find that target MAC (Media Access Control) address and the vlan information of IP message mate with matching list, illustrate that IP message needs to do distributed route, then continue to search routing table, find that " IPDA1.1.2.2 of user VRF 1000 mails to upper united mouth to coupling entry, editor's action is route and adds VXLAN encapsulation, VNI in packaging V XLAN head is 200 ", two layers of head of IP message are then given up by the route editor in editor's action, ttl value subtracts 1, and then add outside VXLAN tunnel head, aggregation networks is mail to from upper united mouth, object VTEP corresponding to virtual machine VM2 is mail to by aggregation networks, it is inner that object VTEP is positioned at VXLAN virtualized server.
In like manner, when the physical equipment PC2 in the network segment 2 will communicate with the virtual machine VM1 in the network segment 1, its idiographic flow is same as described above.
Embodiment 2:
When communicating between the equipment in same network segment, as the physical equipment PC1 in the network segment 1 to communicate with virtual machine VM1 time, the message that then physical equipment PC1 mails to VTEP1 place equipment can not match the entry of " MAC Address+VLAN " in matching list, thus route querying can not be carried out, directly carry out layer two MAC table to search, exported, and add VXLAN network identifier VNI be the VXLAN tunnel hair of 100 toward virtualized server, object VTEP in virtualized server decapsulation can also determine that destination is inner virtual machine VM1.When physical equipment PC2 in the network segment 2 will communicate with virtual machine VM2 in like manner.
Embodiment 3:
Maybe need through fire compartment wall etc. and other network service when the physical equipment PC1 in the network segment 1 or physical equipment PC2 in the network segment 2 communicates with exterior I nternet, for physical equipment PC1, the message that physical equipment PC1 mails to VTEP1 place equipment is searched by the matched rule of " MAC Address+vlan information " in matching list, VTEP1 place equipment also finds match accordingly result, obtain the outlet action of going to described routing device, although also distributed route will be done, but when carrying out routing table lookup on the equipment of VTEP1 place, discovery can not match route entry, now, the outlet action that message obtains by matching list lookup result, directly add that VNI is that the VXLAN hair of 100 is toward VTEP2 place equipment, VTEP2 place equipment mails to routing device to after message decapsulation, next step outlet and editor's action is decided by routing device, message is mail to Internet by last described routing device.
Technology contents of the present invention and technical characteristic have disclosed as above; but those of ordinary skill in the art still may do all replacement and the modification that do not deviate from spirit of the present invention based on teaching of the present invention and announcement; therefore; scope should be not limited to the content that embodiment discloses; and various do not deviate from replacement of the present invention and modification should be comprised, and contained by present patent application claim.
Claims (10)
1. realize a method for the distributed route of VXLAN gateway in the chips, it is characterized in that, comprise the following steps:
The default route outlet information of same user's different sub-network, routing iinformation and exchange outlet information are configured to VXLAN gateway by S1, SDN control end, and corresponding corresponding matching list, routing table and the MAC of generating shows respectively;
S2, the described matching list of the target MAC (Media Access Control) address of the message received and vlan information and its inside matches by described VXLAN gateway, if match, obtains carrying out VXLAN encapsulation and mails to the outlet action of routing device, but do not perform this action and proceed described routing table lookup, entering S3; If described matching list does not match, then enter step S4;
S3, if match respective entries in described routing table, then described message is encapsulated the VXLAN head of upper place, route destination VXLAN network identifier VNI and VXLAN tunnel destination node VTEP and the message after described encapsulation is carried out routing forwarding, the process on VXLAN gateway leaves it at that; If do not match in described routing table, then enter step S5;
S4, message is walked two layers of forwarding process to carry out two layers of described MAC table and search, by lookup result clean culture or broadcast, if destination is not under this VXLAN gateway, then by target MAC (Media Access Control) address place VTEP and the VNI packaging V XLAN head of described message, if destination is under this VXLAN gateway, then directly carry out two layers of forwarding, the process on VXLAN gateway leaves it at that;
S5, forwarded by described outlet action by message, by described routing device place VTEP and VNI packaging V XLAN head, and mail to described routing device, the process on VXLAN gateway leaves it at that.
2. method according to claim 1, is characterized in that, the virtual mac address of described same user's different sub-network gateway is also different.
3. method according to claim 1, it is characterized in that, each described subnet adopts VLANID mark, described user adopts VRF ID to identify, described user VRF ID is mapped by described subnet VLANID and gets, and the described VLAN ID of the different sub-network of same user is mapped to same described VRFID.
4. method according to claim 3, is characterized in that, described matching list uses MAC Address to add VLAN and searches, and the MAC Address in described matching list configuration entry is virtual gateway address; Described routing table uses IP destination address IPDA to add VRF ID and searches; Described MAC table uses MACDA to add VLAN ID and searches.
5. based on a message handling system for VXLAN gateway described in claim 1, it is characterized in that, comprise data center, SDN control end, source physical equipment, object virtual machine, VXLAN gateway and routing device,
SDN control end is used for the default route outlet information of same user's different sub-network, routing iinformation and exchange outlet information to be configured to VXLAN gateway, respectively corresponding generation corresponding matching list, routing table and MAC table;
The message that described VXLAN gateway is sent for receiving described source physical equipment, and the described matching list of the target MAC (Media Access Control) address of described message and vlan information and its inside is matched, if the result of matching, then determine a forwarding behavior sending to described routing device according to matching result, and determine to carry out described routing table lookup; If match result according to described routing table, then send to described object virtual machine by route searching result by after upper for message encapsulation corresponding VXLAN head; If carried out described routing table lookup, but do not matched result, then send to described routing device by the matching result of described matching list by after upper for message encapsulation corresponding VXLAN head; If matching list does not match result, then show lookup result by described MAC and carry out Layer2 switching forwarding.
The physical equipment at described object virtual machine place is used for the message that decapsulation is sended over by described VXLAN gateway, and described object virtual machine is for receiving the message after decapsulation;
Described routing device searches next step outlet less than the message of coupling route entry and editor's action for determining in described routing table.
6. system according to claim 5, it is characterized in that, if match result according to described routing table, then described message encapsulated the VXLAN head of upper place, route destination VXLAN network identifier VNI and VXLAN tunnel destination node VTEP and the message after described encapsulation carried out routing forwarding to described object virtual machine; If do not match result in described matching list, then message is carried out described MAC table to search, by lookup result clean culture or broadcast, if destination is not under this VXLAN gateway, then carry out Layer2 switching forwarding by after the target MAC (Media Access Control) address place VTEP of described message and VNI packaging V XLAN head, export as common Ethernet interface or VXLAN tunnel.
7. the system according to claim 5 or 6, is characterized in that, the virtual mac address of described same user's different sub-network gateway is also different.
8. the system according to claim 5 or 6, it is characterized in that, each described subnet adopts VLAN ID mark, described user adopts VRF ID to identify, described user VRF ID is mapped by described subnet VLAN ID and gets, and the described VLAN ID of the different sub-network of same user is mapped to same described VRF ID.
9. system according to claim 8, is characterized in that, described matching list uses MAC Address to add VLAN and searches, and the MAC Address in described matching list configuration entry is virtual gateway address; Described routing table uses IP destination address IPDA to add VRF ID and searches; Described MAC table uses MACDA to add VLAN ID and searches.
10. the system according to claim 5 or 6, it is characterized in that, described SDN control end is also for being the localized routing in data center by the overall route of described data center and the external routing information route be configured on described routing device on VXLAN gateway, and the route on routing device comprises the route of entire data centre grade and the route of data center outside.
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