IGMP Commands 591
console(config)#interface vlan 15
console(config-if-vlan15)#ip igmp query-max-response-time 10
ip igmp robustness
Use the ip igmp robustness command in Interface Configuration mode to configure the 
robustness that allows tuning of the interface, that is, tuning for the expected packet loss on a 
subnet. If a subnet is expected to have significant loss, the robustness variable may be increased 
for the interface. 
Syntax
ip igmp robustnest 
robustness
no ip igmp robustnest 
•
robustness
 — Robustness variable. (Range: 1-255)
Default Configuration
The default robustness value is 2.
Command Mode
Interface Configuration (VLAN) mode
User Guidelines
This command has no user guidelines.
Example
The following example configures a robustness value of 10 for VLAN 15.
console(config)#interface vlan 15
console(config-if-vlan15)#ip igmp robustness 10
ip igmp startup-query-count
Use the ip igmp startup-query-count command in Interface Configuration mode to set the 
number of queries sent out on startup
—at intervals equal to the startup query interval for the 
interface.
Syntax
ip igmp startup-query-count 
count
no ip igmp startup-query-count