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gRPC

using HTTP/2 (RFC 7540). HTTP/2 is a replacement for HTTP that has been optimized for high performance.

HTTP/2 provides many powerful capabilities including bidirectional streaming, flow control, header

compression and multi-plexing. gRPC builds on those features, adding libraries for application-layer

flow-control, load-balancing and call-cancellation.

gRPC supports distributed applications and services between a client and server. gRPC provides the

infrastructure to build a device management service to exchange configuration and operational data between

a client and a server in which the structure of the data is defined by YANG models.

Cisco gRPC IDL

The protocol buffers interface definition language (IDL) is used to define service methods, and define parameters

and return types as protocol buffer message types.

gRPC requests can be encoded and sent across to the router using JSON. gRPC IDL also supports the exchange

of CLI.

For gRPC transport, gRPC IDL is defined in .proto format. Clients can invoke the RPC calls defined in the

IDL to program XR. The supported operations are - Get, Merge, Delete, Replace. The gRPC JSON arguments

are defined in the IDL.

syntax = "proto3";

package IOSXRExtensibleManagabilityService;

service gRPCConfigOper {

rpc GetConfig(ConfigGetArgs) returns(stream ConfigGetReply) {};

rpc MergeConfig(ConfigArgs) returns(ConfigReply) {};

rpc DeleteConfig(ConfigArgs) returns(ConfigReply) {};

rpc ReplaceConfig(ConfigArgs) returns(ConfigReply) {};

rpc CliConfig(CliConfigArgs) returns(CliConfigReply) {};

}

gRPC Operations

• oper get-config—Retrieves a configuration

• oper merge-config— Appends to an existing configuration

• oper delete-config—Deletes a configuration

• oper replace-config—Modifies a part of an existing configuration

• oper get-oper—Gets operational data using JSON

• oper cli-config—Performs a configuration

• oper showcmdtextoutput

Data Models Configuration Guide for Cisco NCS 1001

Data models