ENA discovers the supported IP SLA operation types on all monitored devices. Polled attributes use the RTTMON MIB, attributes vary according to the operation type.
The Transmission Control Protocol (TCP) Connection operation discovers the time it takes to connect to the target device. This operation is useful for testing virtual circuit or application availability. The measured connection time is the difference between the time ENA sends the ACK and the initial SYN.
When the target is a Cisco device with an enabled responder, then the operation makes a TCP connection to any known port number. When the destination is a non-Cisco IP host, then the target port number must be specified. This operation is useful in simulating connection times, for example to Telnet, SSH, SQL, HTTP.
TCP Connect operation attributes:
|Operation Index||unique identifier of the operation.|
|Name||IP SLA operation name.|
|Type||type of operation to be performed.|
|Frequency||sets the duration between initiating each operation. You should not set this to a value that is of a shorter duration than Timeout. The minimum allowed value is 10 seconds.|
|Tag||descriptive string used by ENA to identify the operation target.|
|Owner||identifies the creator the operation.|
|Protocol||protocol used by the operation.|
|Source Address||specifies the IP address of the source.|
|Target Address||specifies the IP address of the destination.|
port on the source device used by the operation.
|Target Port||target's port number.|
|TOS||defines the IP Type of Service (TOS) byte for request packets. This attribute may also be used as a Differentiated Services Code Point (DSCP).|
|Control Packets||when enabled (true), the operation sends control messages to a responder. The responder resides on the target device to respond to the data request packets being sent by the source device.|
|Lifespan||IP SLA operation interval, by default set to forever. i.e. once created it exists forever on the device, unless deleted by ENA. You can enter a limited lifespan, by entering a value in seconds. When this time elapses, the operation and ENA has to recreate it.|
|VRF Name||name of the MPLS IP VPN VRF.|
|Timeout||length of time, in seconds, that ENA waits for a response from the IP SLA operation before marking it as timed-out. You should not set a value which is of a greater duration than Frequency.|
TCP Connect operation time series attributes:
|Object Name||Attribute and Description|
|rttMonLatestRttOperCompletionTime||Completion Time. The latest completion time of RTT operations that successfully complete.|
|rttMonLatestHTTPOperSense||State. An application specific sense code for the
completion status of the latest RTT operation.