100
4.8.3 Force Filtering
The Force filtering function allows the switch to filter the unknown-multicast
data flow. If Force filtering is enabled, all the unknown multicast data will be
discarded.
4.8.4 CLI Commands of the Multicast Filtering
Command Lines of the multicast filtering configuration
Feature
Command Line
IGMP Snooping
IGMP Snooping -
Global
Switch(config)# ip igmp snooping
IGMP snooping is enabled globally. Please specify on which
vlans IGMP snooping enables
IGMP Snooping - VLAN Switch(config)# ip igmp snooping vlan
VLANLIST allowed vlan list
all all existed vlan
Switch(config)# ip igmp snooping vlan 1-2
IGMP snooping is enabled on VLAN 1-2.
Disable IGMP Snooping
- Global
Switch(config)# no ip igmp snoopin
IGMP snooping is disabled globally ok.
Disable IGMP Snooping
- VLAN
Switch(config)# no ip igmp snooping vlan 3
IGMP snooping is disabled on VLAN 3.
Display – IGMP
Snooping Setting
Switch# sh ip igmp
interface vlan1
enabled: Yes
version: IGMPv1
query-interval; 125s
query-max-response-time: 10s
Switch# sh ip igmp snooping
IGMP snooping is globally enabled
Vlan1 is IGMP snooping enabled
Vlan2 is IGMP snooping enabled
Vlan3 is IGMP snooping disabled
Display – IGMP Table
Switch# sh ip igmp snooping multicast all
VLAN IP Address Type Ports
---- --------------- ------- ------------------------
1 239.192.8.0 IGMP fa6,
1 239.255.255.250 IGMP fa6,
IGMP Query
IGMP Query V1
Switch(config)# int vlan 1 (Go to management VLAN)
Switch(config-if)# ip igmp v1