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BLADE OS Command Reference

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 The Configuration Menu BMD00127, September 2009

/cfg/l3/igmp/snoop

IGMP Snooping Configuration

IGMP Snooping allows the switch to forward multicast traffic only to those ports that

request it. IGMP snooping prevents multicast traffic from being flooded to all ports. The

switch learns which server hosts are interested in receiving multicast traffic, and forwards it

only to ports connected to those servers.

Table 6-51 describes the commands used to configure IGMP Snooping.

[IGMP Snoop Menu]

timeout - Set report timeout

mrto - Set multicast router timeout

qintrval - Set IGMP query interval

robust - Set expected packet loss on subnet

flood - Flood unregistered IPMC

cpu - Send unregistered IPMC to CPU

aggr - Aggregate IGMP report

srcip - Set source ip to use when proxying GSQ

add - Add VLAN(s) to IGMP Snooping

rem - Remove VLAN(s) from IGMP Snooping

clear - Remove all VLAN(s) from IGMP Snooping

fastlv - Enable/disable Fastleave processing in VLAN

def - Set IGMP Snooping settings to factory default

cur - Display current IGMP Snooping configuration

Table 6-51 IGMP Snoop Menu Options (/cfg/l3/igmp/snoop)

Command Syntax and Usage

timeout <1-255 seconds>

Configures the timeout value for IGMP Membership Reports (host). Once the timeout value is

reached, the switch removes the host from its IGMP table, if the conditions are met. The range is

from 1 to 255 seconds. The default is 10 seconds.

mrto <1-600 seconds>

Configures the timeout value for IGMP Membership Queries (mrouter). Once the timeout value

is reached, the switch removes the multicast router from its IGMP table, if the proper conditions

are met. The range is from 1 to 600 seconds. The default is 255 seconds.

qinterval <1-600>

Configures the interval for IGMP Query Reports. The default value is 125 seconds.

robust <2-10>

Configures the IGMP Robustness variable, which allows you to tune the switch for expected

packet loss on the subnet. If the subnet is expected to be lossy (high rate of packet loss), increase

the value. The default value is 2.