public void setProtocol(String protocol) {
        this.protocol = protocol;
    }
<p>
The protocol used for a Connect peer configuration.
</p>

@param protocol
       The protocol used for a Connect peer configuration.
@see TunnelProtocol
aws-java-sdk-networkmanager/src/main/java/com/amazonaws/services/networkmanager/model/ConnectPeerConfiguration.java