Table of Contents
What is IP SLA reachability?
IP SLA is a great tool on Cisco routers that allows us to generate traffic which can be used to check delay/latency, jitter but can also be combined with object tracking. This allows us to check the reachability of a certain IP address (by pinging) or a certain service by connecting to it (using TCP).
What is RTT in IP SLA?
IP SLAs Threshold Monitoring and Notifications IP SLAs support proactive threshold monitoring and notifications for performance parameters such as average jitter, unidirectional latency, bidirectional round-trip time (RTT), and connectivity for most IP SLAs operations.
What is track in routing?
User interface / operation. Layout space: Total number of routing paths, wiring cut-outs or routing ranges that run through a connection routed in the layout space.
What is RTT monitoring?
The Round Trip Time (RTT) Monitor is available under the System Interface. The RTT monitor probes configured hosts on a minute-by-minute basis to check: IP reachability. Functionality of certain services.
What is UDP jitter?
Jitter means inter-packet delay variance. A UDP jitter operation measures unidirectional and bidirectional jitters so that you can verify whether the network can carry jitter-sensitive services such as real-time voice and video services.
What is SRC in IP route?
The src attribute is a hint that is used by the address selection algorithm. It is significant when a host has multiple IP addresses, which is usually, but not always, when it has multiple interfaces.
What is RTT and RTTsd?
RTT is the average (mean) of the round trip time. RTTsd is the standard deviation of the round trip time, which gives you an idea of the variance in the measurements.
Is RTT and ping the same?
RTT is also known as ping time, and can be determined with the ping command. End-to-end delay is the length of time it takes for a signal to travel in one direction and is often approximated as half the RTT.
Why is IP SLA used?
IP SLA (Internet protocol service level agreement) is a feature of the Cisco Internetwork Operating System (Cisco IOS) that allows an IT professional to collect information about network performance in real time.
What is metric in ip route?
A metric is a value that’s assigned to an IP route for a particular network interface. It identifies the cost that’s associated with using that route. For example, the metric can be valued in terms of link speed, hop count, or time delay.
What is the difference between state and reachability for Echo IP SLA?
If you configure a threshold on the ip sla operation: Therefore, if you configure a threshold, the reachability option only takes into account if you can reach the destination IP address of the Echo IP sla operation. The state option also takes into account the RTT of the Echo IP sla operation.
Which Cisco routers does IP SLA and track apply to?
It applies to all Cisco routers that run Cisco IOS and where IP SLA and Track can be configured. The information in this document was created from the devices in a specific lab environment. All of the devices used in this document started with a cleared (default) configuration.
What is IPIP SLA and how does it work?
IP SLA is a powerful tool, which I will only scratch the surface of in this post in regards to route tracking. I had a scenario where the primary default route should be removed if the internet was no longer accessible through the primary interface.
What is the difference between state and reachability in overthreshold?
The difference between state (also the default) and reachability option has to do with the acceptance of the OverThreshold return code (as indicated on the upper link), and not whether the route is or not in the table. If you configure a threshold on the ip sla operation: