Availability Monitoring Sample Clauses

Availability Monitoring. Meriplex agrees to monitor up to two (2) TCP ports (HTTP, HTTPS, SMTP, POP3, etc.) per server for service availability. General server availability shall be tested every one (1) minute via ping. Customer will be alerted via ticket if port or ping monitors fail three (3) consecutive times. Customer may also configure monitoring for one (1) URL’s content. Port and URL content checks shall be performed every five (5) minutes.

Availability Monitoring. ICMP Echo ICMP echo measures the end-to-end response time between a Cisco router and any IP device by measuring the time between sending an ICMP echo request message to the destination and receiving an ICMP echo reply. This operation takes into account the processing time taken by the sender but cannot take into account any processing time in the target device. This is a good tool to measure availability but does not give much indication if there are any underlying problems in the network or destination host. ICMP Path Echo The path discovered ICMP echo operation is different from the regular ICMP echo in that it first does a traceroute to discover the path from a source to the destination and then measures the response time between the source router and each of the intermittent hops in the path. It also has an option of using strict and loose source routing (LSR), which enables IP SLA to use a particular path instead of using traceroute’s discovered path. This operation gives more detail on the IP addresses of the hops taken as well as any failures in the intermediate path. ICMP Jitter The ICMP jitter operation is very similar to ICMP echo but also provides latency, jitter, and packet loss beside the round-trip measurement. Jitter, also known as IP Packet Delay Variation (IPDV), is a measurement of delay variation. For example, if five packets are sent with an interval of 5 ms each, they should be received 5 ms apart at the destination. If a certain packet arrives after 7 ms, the jitter value is a positive number 2 (7 – 5); if it is received in 3 ms, the value is a negative jitter of –2 (3 – 5). For applications like VoIP and video, a jitter value of 0 is the most ideal. ICMP Path Jitter The path discovered ICMP jitter operation is very similar to ICMP path echo but also provides jitter operation statistics like latency, jitter, and packet loss on a per hop basis. The operation first discovers the path using traceroute, then it sends an ICMP echo message to determine the response time, jitter, and packet loss for each of the hops. UDP Echo The UDP echo operation is more useful than ICMP echo because the IP SLA responder understands UDP echo and therefore the operation accounts for the processing time taken by the target to generate a more accurate measurement. UDP Jitter The IP SLA UDP jitter operation was primarily designed to diagnose network suitability for traffic applications such as VoIP, video over IP, or real-time conferencing. This is the only op...