The igmp-snooping signal-ignore-df enable command enables the DF status ignoring function in a BD.
The undo igmp-snooping signal-ignore-df enable command disables the DF status ignoring function in a BD.
By default, the DF status ignoring function is disabled in all BDs.
Usage Scenario
IGMP snooping is deployed in a BD in an EVPN dual-homing scenario. To implement fast convergence after a fault occurs on the access side, PEs in the non-DF state also need to advertise BGP EVPN SMET routes carrying Layer 2 multicast information to pre-import multicast traffic. To meet this requirement, run the igmp-snooping signal-ignore-df enable command to enable the DF status ignoring function in BDs of the PEs in the non-DF state.
Traffic is switched back in a dual-homing scenario. Therefore, you must run this command on the PEs in both the DF and non-DF states to implement fast convergence during the switchback.Prerequisites
The evpn binding vpn-instance command has been run in a BD.
<HUAWEI> system-view [~HUAWEI] evpn vpn-instance abcd bd-mode [*HUAWEI-instance-abcd] route-distinguisher 100:200 [*HUAWEI-instance-abcd] quit [*HUAWEI] bridge-domain 1 [*HUAWEI-bd1] evpn binding vpn-instance abcd [*HUAWEI-bd1] igmp-snooping proxy [*HUAWEI-bd1] igmp-snooping signal-ignore-df enable