# ifconfig eth0
 eth0 Link encap:Ethernet HWaddr 00:0C:29:F1:FF:EA 
 inet addr:78.46.74.27 Bcast:78.46.74.31 Mask:255.255.255.224
 inet6 addr: fe80::20c:29ff:fef1:ffea/64 Scope:Link
 UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
 RX packets:5339836 errors:0 dropped:0 overruns:0 frame:0
 TX packets:5486444 errors:0 dropped:0 overruns:0 carrier:0
 collisions:0 txqueuelen:1000
 RX bytes:820300389 (782.2 MiB) TX bytes:1929979381 (1.7 GiB)
 Base address:0x1400 Memory:e8820000-e8840000

Disable Multicast:


 ifconfig eth0 -multicast

result:


 # ifconfig eth0
 eth0 Link encap:Ethernet HWaddr 00:0C:29:F1:FF:EA 
 inet addr:78.46.74.27 Bcast:78.46.74.31 Mask:255.255.255.224
 inet6 addr: fe80::20c:29ff:fef1:ffea/64 Scope:Link
 UP BROADCAST MTU:1500 Metric:1
 RX packets:5339836 errors:0 dropped:0 overruns:0 frame:0
 TX packets:5486444 errors:0 dropped:0 overruns:0 carrier:0
 collisions:0 txqueuelen:1000
 RX bytes:820300389 (782.2 MiB) TX bytes:1929979381 (1.7 GiB)
 Base address:0x1400 Memory:e8820000-e8840000

No Multicast present in the interface

Enable Multicast :

 ifconfig eth0 multicast