Lantronix EMG 8500 EMG User Guide - Page 142

7: Networking Data Size The size in bytes to use for the payload portion of the packet - this size is in addition to the IPv4 header and the TCP, UDP or ICMP header. Any additional space in the packet that is not used by the protocol will be padded with random data that can be used for data verification (see below). This parameter is only supported for ICMP Echo, TCP Connect, UDP Echo, UDP Jitter, and UDP Jitter VoIP probes. The maximum payload for any probe is 1460 bytes. The minimum payload size for probes is: UDP Jitter VoIP G.729a codec probes - 32 bytes; all other UDP Jitter probes - 64 bytes; ICMP Echo probes - 18 bytes; TCP Connect probes - 1 bytes; UDP Echo probes - 4 bytes. If no data size is specified (e.g., it is set to zero), a default payload size will be used for the probes as follows:  ICMP Echo - 56 bytes  UDP Jitter VoIP G.729A - 32 bytes  UDP Jitter (all others) - 64 bytes  TCP Connect and UDP Echo - 256 bytes Verify Data If enabled, indicates that the EMG should verify if there is data corruption in the reply packets. This parameter is only supported for ICMP Echo, UDP Echo, UDP Jitter, and UDP Jitter VoIP probes. Timeout How long the EMG will wait for a packet to arrive, in milliseconds. If the packet arrives after the timeout it will be considered a Late Arrival error (see Error Conditions Detected by Probes). The valid range is 10 - 1000, and the default is 200 msec. UDP Jitter VoIP Codec For UDP Jitter VoIP probes, the codec to simulate. The following codecs are available:  G.729A - 32 byte packets sent 20 msec apart, 1000 packets per operation, 60 seconds between operations  G.711 A-law - 172 byte packets sent 20 msec apart, 1000 packets per operation, 60 seconds between operations  G.711 mu-law - 172 byte packets sent 20 msec apart, 1000 packets per operation, 60 seconds between operations The default values for the VoIP probes can be overridden to use different packet sizes, intervals, etc. ICMP Ethernet Interface For ICMP Echo probes, which Ethernet interface can be used for the probe: both interfaces, Ethernet Port 1, or Ethernet Port 2. TOS (Type of Service) Sets the IPv4 Type of Service field in the IPv4 header. This is available for UDP Jitter and UDP Jitter VoIP probes only. The range is 0 - 255, and the default value is 0. DNS Name Server IP For DNS Lookup probes, the IP address of the DNS name server to use for Address lookups. 4. Click the Apply button. EMG™ Edge Management Gateway User Guide 142