D-Link DES-3326, Руководство пользователя

Страница: 372 / 425

24-port NWay Ethernet Switch User’s Guide
356 Web-Based Network Management
Parameter Description
Sequence A counter incremented whenever an entry
to the switch’s history log is made. The
table displays the last entry (highest
sequence number) first.
Time
Displays the time in days, hours, and
minutes since the switch was last
restarted the history log entry was made.
Log Text
Displays text describing the event that
triggered the history log entry.
Browse the Router Port Table
A static router port is simply a port that has a router attached
to it. Generally, this router would have a connection to a WAN
or to the Internet. Establishing a router port allows multicast
packets coming from the router to be propagated throughout the
network, as well as allowing multicast messages coming from the
network to be propagated to the attached router.
The purpose of a router port is to enable UDP multicast packets,
and IGMP multicast group membership messages to reach a
multicast router. Routers do not implement IGMP snooping or
transmit/forward IGMP report packets. Thus, forwarding all IP
UDP multicast packets to a static router port guarantees that all
multicast routers – attached to the switch – can reach all
multicast group members.
The switch monitors each port for UDP multicast packets and
IGMP multicast group membership reports. When these