D-Link DGS-1216T Инструкция по эксплуатации онлайн [49/63] 40007

is notified that there are no more members. It also allows adjustments

for controlling the frequency of IGMP traffic on a subnet. Default is

10 seconds.

Robustness Variable (1-255 sec): The Robustness Variable allows

adjustment for the expected packet loss on a subnet. If a subnet is

expected to be lossy, the Robustness Variable may be increased. The

Robustness Variable can not be set zero, and SHOULD NOT be one.

Default is 2 seconds.

Last Member Query Interval (1-25 sec): The Last Member Query

Interval is the Max Response Time inserted into Group-Specific

Queries sent in response to Leave Group messages, and is also the

amount of time between Group-Specific Query messages. This value

may be adjusted to modify the "leave latency" of the network. A

reduced value results in reduced time to detect the loss of the last

member of a group. Default is 1 second.

Host Timeout (130-1225 sec): This is the interval after which a learnt

host port entry will be purged. For each host port learnt, a

'PortPurgeTimer' runs for 'HostPortPurgeInterval'. This timer will be

restarted whenever a report message from host is received over that

port. If no report messages are received for 'HostPortPurgeInterval'

time, the learnt host entry will be purged from the multicast group.

Default is 260 seconds.

Router Timeout (60-600 sec): This is the interval after which a learnt

router port entry will be purged. For each router port learnt, a

'RouterPortPurgeTimer' runs for 'RouterPortPurgeInterval'. This timer

will be restarted whenever a router control message is received over

that port. If no router control messages are received for

'RouterPortPurgeInterval' time, the learnt router port entry will be

purged. Default is 125 seconds.