Cross-network slice segment routing forwarding method and device
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A network slicing and cross-network technology, applied in the field of segment routing and forwarding methods and devices, can solve the problems that different network slice services cannot communicate with each other, and it is impossible to transmit across network slices
Active Publication Date: 2019-09-20
UTSTARCOM TELECOM CO LTD
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The SID part that only includes the node identifier locator, function identifier function, and parameter identifier arguments is called eSID, which is stored in the SID list of the SRH header, which means that the content of the network slice identifier part only exists in the destination IP address. Therefore, using IETFdraft- The functions defined in the ietf-spring-srv6-network-programming-00 standard do not contain any information about network slices, so they can only be forwarded within one network slice, thereby isolating different network slices, so that services of different network slices cannot Intercommunication, it is even more impossible to achieve cross-network slice transmission through cross-gateway nodes
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Embodiment 1
[0049] refer to figure 1 , an embodiment of the present invention provides a cross-network slice segment routing forwarding method, which includes:
[0050] Step S101, obtain the message to be transmitted, and determine that the message is forwarded between network slices at the local node; wherein, each port of the local node belongs to a different network slice;
[0051] Step S102, if the segment routing header SRH in the message satisfies the preset condition, then look up the network slice identifier corresponding to the parameter of the endpoint function in the message in the local network slice identifier mapping table; wherein, the preset condition includes The code in the NH domain is SRH and the number of segment lists in the SRH reaches the specified number;
[0052] Step S103, obtaining the effective segment identifier eSID of the next network slice in the SRH;
[0053] Step S104, based on the network slice identifier and eSID, the destination IP address of the me...
Embodiment 2
[0098] Such as Figure 5 As shown, the embodiment of the present invention provides a segment routing forwarding device across network slices, which may include the following modules:
[0099] The determination module 11 is configured to obtain the message to be transmitted, and determine that the message is forwarded between network slices at the local node; wherein, each port of the local node belongs to a different network slice;
[0100] The first search module 12 is configured to search the local network slice identifier mapping table for the network slice identifier corresponding to the parameter of the endpoint function in the message if the segment routing header SRH in the message meets the preset condition; wherein , the preset conditions include that the code in the NH domain is SRH and the number of segment lists in the SRH reaches the specified number;
[0101] An acquisition module 13, configured to acquire the effective segment identifier eSID of the next netwo...
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Abstract
The invention provides a cross-network slice segmented routing forwarding method and device, and relates to the technical field of communication, and the method comprises the steps: obtaining a message to be transmitted, and determining that the message is forwarded between network slices at a local node; if the segment routing header SRH in the message satisfies a preset condition, searching a local network slice identifier mapping table for a network slice identifier corresponding to the parameter of the endpoint function in the message; obtaining a valid segment identifier eSID of the next network slice in the SRH; updating the destination IP address of the message based on the network slice identifier and the eSID to obtain an updated message; and searching an outlet of the updated message to the next hop according to the end point function, so that the updated message realizes cross-network forwarding in a local network slice. According to the invention, the message is forwarded from the previous network slice to the next network slice by using the network slice represented by the network slice identifier, the cross-network-slice transmission of the message is realized, and the service intercommunication of different network slices is realized.
Description
technical field [0001] The present invention relates to the field of communication technologies, in particular to a method and device for cross-network slicing segment routing and forwarding. Background technique [0002] SR (Segment Routing, segment routing) technology is a new technology and new standard discussed by the IETF standardization organization, and most of the standards are still in the draft stage at present. SR is a source routing technology. The path information is displayed in the packet header, and each node only needs to decide the next step according to the instruction of the packet header. According to different underlying forwarding technologies, SR is divided into SR MPLS and SRv6. SRv6 is a source routing technology that carries SL (segment list, segment list) through the extended header of SRH (Segment Routing Header, segment routing header). Each segment is marked with a 128bit IPv6 address, and the packet Forwarding relies on information encoded ...
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