HP TopTools for Hubs and Switches - Manual (Page 76)

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Group Policies
Security Configuration Policies
Special multicast routers/queriers communicate by using three message
types - query, report, and leave group. The query message, sent by a querier,
is used to discover which network interfaces belong to a multicast group. Each
host responds to the query message with a report message that tells the querier
the host is a member of the multicast group. The host also can send a report
message to join a group or a leave message to leave a group.
N o t e Using the console you can designate specific ports to always or never forward
multicast packets.
Forward with High Priority
When Forward with High Priority is checked, any IGMP packets received by the
switch will be forwarded in a prioritized manner, preceding packets with
normal priority.
The Spanning Tree Protocol
The Spanning Tree Protocol (IEEE 802.1d) maintains a loop-free topology in
networks with redundant bridges or switches. The spanning tree devices
determine which devices will be active and which will be backups so that no
two nodes in a network have more than one active path between them at any
time. The Spanning Tree Protocol uses the most efficient path between
segments. If a bridge or switch fails, the other bridges and switches
reconfigure the network automatically. When the problem is repaired, the
bridges and switches automatically return to the original network
configuration.
Security Configuration Policies
To configure Security policies for a group, click on the Security button in the
Configuration Policies main page. The Security Policies page for that group
displays.
Communities
You can create up to five communities for each group. The default community
is “public”.
C a u t i o n Do not delete the “public” community.
The Read Access and Write Access choices are:
■ None—Provides access to no tasks in HP TopTools