Brocade Mobility RFS Controller System Reference Guide (Supporting software release 5.5.0.0 and later) - Manual (Page 456)

444 Brocade Mobility RFS Controller System Reference Guide
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3. Set or override the following IGMP Querier parameters for the profile’s bridge VLAN
configuration:
Select the OK button located to save the changes. Select Reset to revert to the last saved
configuration.
Quality of Service (QoS) Configuration
Profile Network Configuration
QoS values are required to provide priority to some packets over others. For example, voice packets
get higher priority than data packets to provide a better quality of service for high priority voice
traffic.
The profile QoS screen maps the 6-bit Differentiated Service Code Point (DSCP) code points to the
older 3-bit IP Precedent field located in the Type of Service byte of an IP header. DSCP is a protocol
for specifying and controlling network traffic by class so certain traffic types get precedence. DSCP
specifies a specific per-hop behavior applied to a packet.
To define an QoS configuration for DSCP mappings:
1. Select Configuration > Profiles > Network.
2. Expand the Network menu to display its submenu options.
3. Select Quality of Service.
Enable IGMP Querier Select this option to enable IGMP querier. IGMP snoop querier is used to keep
host memberships alive. It’s primarily used in a network where there’s a multicast
streaming server and hosts subscribed to the server and no IGMP querier
present. An IGMP querier sends out periodic IGMP query packets. Interested
hosts reply with an IGMP report packet. IGMP snooping is only conducted on
wireless radios. IGMP multicast packets are flooded on wired ports. IGMP
multicast packet are not flooded on the wired port. IGMP membership is also
learnt on it and only if present, then it is forwarded on that port.
IGMP Version Use the spinner control to set the IGMP version compatibility to either version 1, 2
or 3. IGMPv1 is defined by RFC 1112, IGMPv2 is defined by RFC 2236 and
IGMPv3 defined by RFC 4604 which defines both IGMPv3 and MLDv2. IGMPv2
improves over IGMPv1 by adding the ability for a host to signal desire to leave a
multicast group. IGMPv3 improves over IGMPv2 by adding the ability to listen to
multicast traffic originating from a set of source IP addresses exclusively. The
default setting is 3.
IGMP Query Interval Set the interval IGMP queries are made. Options include Seconds
(1 - 18,000), Minutes (1 - 300) and Hours (1 - 5). The default setting is one
minute.
IGMP Robustness
Variable IGMP utilizes a robustness value used by the sender of a query. Update the
robustness variable to match the most recently received query unless the value is
zero.
Maximum Response
Time Specify the maximum interval (from 1 - 25 seconds) before sending a responding
report. When no reports are received from a radio, radio information is removed
from the snooping table. The controller or service platform only forwards
multicast packets to radios present in the snooping table. For IGMP reports from
wired ports, the controller or service platform forwards these reports to the
multicast router ports. The default setting is 10 seconds.
Other Querier Timer
Expiry Specify an interval in either Seconds (60 - 300) or Minutes (1 - 5) used as a
timeout interval for other querier resources. The default setting is 1 minute.