Finisar Surveyor manual Buffer Size, Packet Slice Slicing Size, Default Module Settings

Surveyor

User’s Guide

Module settings are described in the subsections below. Default values for Module Settings are shown in Table 4-4:

	Table 4-4. Default Module Settings
Module Setting		Default Values
Buffer Size		512K
Packet Slicing Size, Capture		Full packet length
Packet Slicing Size, Monitor		Full packet length (for THGm), 128 bytes (for standard NDIS
		modules)
Enable Full Buffer Auto Save		Not selected
Expert Symptoms		All symptoms enabled except TCP checksum errors
Modes: Expert Analysis Mode		Selected (Expert plug-in only)
Modes: Non-WKP Mode		Not selected
Modes: Multi-QoS Only		Not selected (Multi-QoS plug-in only)
Expert Threshold		Each threshold has its own default value
MAC Control Frame		Selected for THGm, not supported by others

Buffer Size

Portable Surveyor 10/100 Ethernet Analyzer Card and NDIS cards require that a capture buffer size be set. The buffer size is the amount of system memory that will be used to save captured data. Buffer sizes can be set between 64KB and 16MB.

THGm modules have a hardware buffer and do not require system memory for captured data. The default buffer size is 512KB.

Packet Slice (Slicing Size)

All devices support packet slicing. Packet slicing means that a subset of the entire packet is saved in the capture buffer. You can save the first 32 bytes (Mac layer), the first 64 bytes (Network layer), the first 112 or 128 bytes (Application layer), or the full length of the packet.

Packet slicing can be set separately for monitor and capture except for THGm. For monitor, packet slicing can improve performance when monitoring the entire packet contents is not required. For capture, packet slicing can save space in the capture buffer for more packets when analysis of the entire contents of each packet is not required.

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