547
edits
Path measurement: Difference between revisions
Jump to navigation
Jump to search
→Configuration
| Line 41: | Line 41: | ||
Measurement settings: | Measurement settings: | ||
* Maximum packet delay: This field describes the maximum amount of seconds to wait for packet information from the remote device. | * '''Maximum packet delay''': This field describes the maximum amount of seconds to wait for packet information from the remote device. | ||
: It basically means that the master devices waits for this number of seconds before deciding if a packet has been lost or not. If the data from the remote device arrives before those number of seconds, the path measurement can account the packet loss, if any and the two-way latency. This value must be at least as large as the worst-case latency between both measurement sites. | : It basically means that the master devices waits for this number of seconds before deciding if a packet has been lost or not. If the data from the remote device arrives before those number of seconds, the path measurement can account the packet loss, if any and the two-way latency. This value must be at least as large as the worst-case latency between both measurement sites. | ||
: Usually 3 seconds are more than enough but when the network in between can have a very long delay, you can increase the value. This will, however, use more main memory for the packet buffer. | : Usually 3 seconds are more than enough but when the network in between can have a very long delay, you can increase the value. This will, however, use more main memory for the packet buffer. | ||
* Ignore IP identification field: This option can be enabled if the IP identification field in the IPv4 header is modified by some component in the network. Often it remains constant for a single packet so this option should be left disabled as it will also increase the chance of reporting duplicate packets. But if you notice symmetrical packet loss you can enable this option to see if this helps. | * '''Ignore IP identification field''': This option can be enabled if the IP identification field in the IPv4 header is modified by some component in the network. Often it remains constant for a single packet so this option should be left disabled as it will also increase the chance of reporting duplicate packets. But if you notice symmetrical packet loss you can enable this option to see if this helps. | ||
The settings must be saved but to actually take effect, a restart of the packet processing is necessary. If this step is required will tell so at the bottom of the page under '''Required actions'''. | The settings must be saved but to actually take effect, a restart of the packet processing is necessary. If this step is required will tell so at the bottom of the page under '''Required actions'''. | ||