CallHome

Introduction

Call Home is a mechanism for allowing servers to initiate connections to clients. Its configuration is a part of ietf-netconf-server model used by Netopeer. There are so-called applications that can have many servers defined. An application tries to connect to each server (which is, in fact, a client) until a connection and a NETCONF session is established. There are various options in the model that enable to tune the exact behavior.

Example configuration

To try an SSH Call Home, you can use this example configuration.

<netconf xmlns="urn:ietf:params:xml:ns:yang:ietf-netconf-server">
    <ssh>
        <call-home>
            <applications>
                <application>
                    <name>test</name>
                    <servers>
                        <server>
                            <address>127.0.0.1</address>
                            <port>6666</port>
                        </server>
                    </servers>
                    <host-keys>
                        <host-key>
                            <name>localhost</name>
                        </host-key>
                    </host-keys>
                </application>
            </applications>
        </call-home>
    </ssh>
</netconf>

It leaves all the options on default. If you use the listen command in netopeer-cli, a connection will be initiated by netopeer-server. The host-keys container is actually not supported and is ignored by the server, but the model demands it.