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Packet ring buffer: Difference between revisions
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:The data on that disk is now part of the packet ring buffer. | :The data on that disk is now part of the packet ring buffer. | ||
* Remove from cluster: Remove the disk from the ring buffer. | * Remove from cluster: Remove the disk from the ring buffer. | ||
:The data stored on that disk is not part of the packet ring buffer | :The data stored on that disk is no longer not part of the packet ring buffer but the data is not removed from the disk. It can be resumed in the cluster at a later time. | ||
:If a disk is missing because it was e.g. removed from the enclosure it will be displayed in a separate list with much of the information as in the list described above but only one button with the option to remove it from the cluster packet ring buffer. | :If a disk is missing because it was e.g. removed from the enclosure, it will be displayed in a separate list with much of the information as in the list described above but only one button with the option to remove it from the cluster packet ring buffer. | ||
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==== Packet ring buffer snapshot length filter ==== | ==== Packet ring buffer snapshot length filter ==== | ||
Rules can be configured that control the snapshot length of each packet which | Rules can be configured that control the snapshot length of each packet which will be stored in the packet ring buffer. | ||
These rules can also be used to prevent certain packets from being stored in the packet ring buffer. | These rules can also be used to prevent certain packets from being stored in the packet ring buffer. | ||
This allows to fine tune how much packet data needs to be written to the packet ring buffer. | This allows to fine tune how much packet data needs to be written to the packet ring buffer. | ||
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When creating a snapshot length filter rule, a | When creating a snapshot length filter rule, a dialogue is displayed and allows the following options: | ||
* Rule condition: Specify which packets to match. | * Rule condition: Specify which packets to match. | ||
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|- | |- | ||
! Rule condition | ! Rule condition | ||
! | ! description | ||
|- | |- | ||
| All packets | | All packets | ||
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|- | |- | ||
| Layer 7 protocol | | Layer 7 protocol | ||
| the selected | | the selected Layer 7 protocol | ||
|- | |- | ||
| outer VLAN tag | | outer VLAN tag | ||
| the most outer VLAN tag (directly after | | the most outer VLAN tag (directly after Ethernet header) | ||
|- | |- | ||
| interface | | interface | ||
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|- | |- | ||
| Full | | Full | ||
| The | | The entire packet is captured. | ||
|- | |- | ||
| Header + data | | Header + data | ||
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Capture just certain parts of the packet. | Capture just certain parts of the packet. | ||
When selecting '''L3 header''', | When selecting '''L3 header''', Layer 2 and Layer 3 headers are stored. | ||
When selecting '''L3 + L4 header''', | When selecting '''L3 + L4 header''', Layer 2, 3 and 4 headers are stored. | ||
When selecting '''L3 + L4 + L7 data''', an input field is shown where the length of | When selecting '''L3 + L4 + L7 data''', an input field is shown where the length of Layer 7 data can be configured. In this case Layers 2, 3 and 4 are stored together with the specified amount of Layer 7 data. | ||
|} | |} | ||
==== Analyzing the packet ring buffer ==== | ==== Analyzing the packet ring buffer ==== | ||
When the packet ring buffer is activated it is possible to restart the packet processing core and analyze all packets contained in the packet ring buffer. | When the packet ring buffer is activated, it is possible to restart the packet processing core and analyze all packets contained in the packet ring buffer. | ||
When the Analyze packet ring buffer button is pressed a | When the Analyze packet ring buffer button is pressed, a dialogue will appear which allows you to choose the time range of the packet ring buffer which is to be replayed. | ||
After confirming this | After confirming this dialogue, the Network Multimeter will reset all statistics and start analyzing the contents of the packet ring buffer. | ||
Progress, statistics and the option to resume normal operation will appear on the Packet ring buffer page. | Progress, statistics and the option to resume normal operation will appear on the Packet ring buffer page. | ||
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==== Extracting the packet ring buffer ==== | ==== Extracting the packet ring buffer ==== | ||
When the packet ring buffer is active the | When the packet ring buffer is active, the entire contents can be extracted by capturing the complete timespan that is contained within. | ||
For convenience a button | For convenience, a button labelled Extract packet ring buffer is available that opens the capture dialogue with the start time and end time set to the appropriate values. | ||