T-VIPS CP560, User Manual

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74 WEB Interface
CP560 DVB-T2 Gateway User’s Manual Rev. 2.2 (3686) ID: um_t2gateway
if you are pinging between data interfaces, the Allow ping response option on the network
page Advanced tab (see Section 8.4.5.1.3 ) must be enabled both in the transmitter and the
receiver.
Note: When the IP destination is a multicast address one cannot expect to
receive a response to a ping request. It is recommended to test connectivity
using the device’s actual IP address.
TTL (Time To Live)
Enter the time to live value for the ping messages here. The time to live value is a field in
the IP protocol header that is decremented once for each router that the datagram passes.
When the count reaches 0, the datagram is discarded. You can use this to check the
number of routers between the transmitter and the receiver by starting with a low value
and increment it until ping responses are received. TTL is also specified for each data
channel on the IP transmitter, and must be high enough to reach the receiver. Values range
from 1 to 255.
Ping count
The number of ping messages to send. The messages are transmitted with an interval of
about 1 second.
Start
Press this button to start the pinging sequence configured above. The status of the ping
sequence is displayed in the status frame. Status values are reset on pressing the start
button. After pressing the start button the label switches to
Stop , and the button can be
pressed again to cancel the pinging sequence.
OK responses
The number of ping responses received.
Timeouts
The number of ping requests that were not answered. If the timeout counter is incrementing
while the
OK responses counter is zero, there is no contact with the specified IP address.
Last roundtrip
The round trip time measured for the last ping request in units of milliseconds.
Average roundtrip
The average round trip time measured for the ping requests in this session. The value is
reset every time the start button is pressed.
Min roundtrip
The shortest round trip time registered for the ping requests in this session.
Max roundtrip
The longest round trip time measured for the ping requests in this session.
Remaining
The number of remaining ping requests in this session.