6: Networking
EMG™ Edge Management Gateway User Guide
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3. Modify the probe settings:
Probe Type
Select from one of the available probe types:
DNS Lookup -
Performs a DNS lookup on the hostname specified in the
Destination Host using the Name Server. By default port 53 is always used as
the Destination Port.
HTTP Get -
Performs an HTTP Get to the home (root) of the web server at the
Destination Host and Destination Port.
ICMP Echo -
Sends ICMP Echo (ping) packets to the Destination Host.
TCP Connect -
Performs a TCP Connection to the Destination Host and
Destination Port.
UDP Echo -
Sends UDP Echo packets to the Destination Host and Destination
Port.
UDP Jitter -
Sends UDP jitter packets using a simplified version of the Cisco IP
SLA v2 (Engine II) protocol to the Destination Host and Destination Port.
UDP Jitter VoIP -
Sends UDP jitter packets configured to simulate Voice over
IP network traffic (VoIP) using a simplified version of the Cisco IP SLA v2
(Engine II) protocol to the Destination Host and Destination Port.
Name
Probe name, up to 40 characters long. Valid characters are letters, numbers,
dashes (-), periods and underscores (_).
Number of Operations
Number of operations to perform for the probe. Probes can for a specific number
of operations. The valid range is 1 - 1000, and the default is 100.
Frequency between
Operations
Time between probe operations, in seconds. The valid range is 5 - 3600 seconds,
and the default is 60 seconds.
Number of Packets
Number of packets to send for each probe. For DNS Lookup probes, this is the
number of lookups to perform. For HTTP Get probes, this is the number of HTTP
Gets to perform. For TCP Connect probes, this is the number of TCP connections
to perform. The valid range is 1 - 1000 for the Local repository and 1 - 2000 for a
USB or SD card repository. The default is 10 packets.
Interval between
Packets
Interval between packets in milliseconds. The valid range is 10 - 5000
milliseconds, and the default is 500 milliseconds. For HTTP Get, DNS Lookup and
TCP Connect probes, the timeout must be less than the interval due to a new
socket being created and destroyed for each packet.
Start Time
Time to start the probe:
Now
starts the probe immediately;
At date/time
will start
the probe at the specified date and time in the future;
After waiting
will start the
probe after waiting a period of time that is less than 24 hours. When the EMG is
rebooted, the probe will start according to the
Start Time
settings: (a) immediately
if it set to
Now
, (b) at a date and time in the future if it is set to
At date/time
and
the date and time is in the future, (c) after waiting a period of time if it is set to
After waiting
.
Destination Host
The hostname or IP address to send packets to. For DNS Lookup probes this is
the hostname to lookup.
Destination Port
The TCP or UDP port to send packets to. For ICMP probes, the port setting is not
used. For DNS Lookup probes, the destination port is always port 53. Port 1967 is
reserved for the UDP jitter responder. The valid range is 1 - 65535.
Precision
The precision to view results in - milliseconds (the default) or microseconds. Jitter
results are always displayed in milliseconds.