GE T1000, Technical Manual

Page: 177 / 302

Chapter 7
– Configuration
GE Reason Switches
REASON SWITCHES-TM-EN-3 177
address used will be the IP address of the management
interface of the switch. Allowed values are in the IP
version 4 (IPv4) address range, and values must be
configured in dotted decimal format;
 Compatibility : indicates which IGMP version this entry
should be compatible to. Allowed values are IGMP-auto,
Forced IGMPv1, Forced IGMPv2 and Forced IGMPv3. By
default, IGMP-auto is selected, which means switch will
define itself protocol running at the VLAN. Forced IGMP
values allow user to configure explicitly which version
entry should use;
 PRI : indicates priority (PCP bits at the Ethernet frame) of
the IGMP control frames at the network, to prioritize or not
these messages at the switch, redirecting it to a given
queue. At the network, switch will send PCP value to other
devices embedded at the frame. Allowed values are the
PCP range values, from 0 to 7;
 RV : indicates the robustness variable value for use in the
network by this entry. This field allows tuning of the
expected loss of data on a given network. Networks that
lose many packets should have this number increased. RV
value must not be equal to 0 or 1. By default, its value is
set to 2. Allowed values are integer numbers from 2 to
255;
 QI (sec) : indicates the Query Interval to be used between
general queries of this entry. These general queries
messages are exchanged between IGMP interfaces to all
of them have knowledge about the multicast group.
Allowed values are integer numbers from 1 to 31,744
seconds. By default, query interval is set to 125 seconds;
 QRI (0.1 sec) : indicates the Query Response Interval,
which is the maximum time that clients can take to
answer to a general query message. Allowed values are
numbers from 1 to 31,744 tenth of seconds. By default,
query interval is set to 100 (which means 10 seconds);

LLQI (0.1 sec) : indicates the Last Listener Query Interval of
this entry. LLQI timer indicates the maximum time
allowable by a client to answer to the querier. When this
timer is expired, querier and snoopers at the network will
stop sending multicast data to this client. By default,
query interval is set to 100 (which means 10 seconds);

URI (sec) : indicates the Unsolicited Report Interval of this
entry. This timer indicates the time between repetitions of
a host’s initial report of a membership in a group. Allowed
values are integer numbers from 1 to 31,744 seconds. By
default, query interval is set to 1 second.