224.0.0.0表示什么意思？

phpasp

aa1>netstat -nr \r\n\r\nRouting Table: IPv4\r\nDestination Gateway Flags Ref Use Interface\r\n-------------------- -------------------- ----- ----- ------ ---------\r\n10.228.210.0 10.228.210.1 U 1 4 eri0\r\n192.168.1.0 192.168.1.100 U 1 8 ce0\r\n192.168.2.0 192.168.2.100 U 1 26 ce1\r\n224.0.0.0 10.228.210.1 U 1 0 eri0\r\ndefault 10.228.210.62 UG 1 0 \r\n127.0.0.1 127.0.0.1 UH 30 7313 lo0\r\naa1>\r\n\r\naa1>ifconfig -a\r\nlo0: flags=1000849<UP,LOOPBACK,RUNNING,MULTICAST,IPv4> mtu 8232 index 1\r\ninet 127.0.0.1 netmask ff000000 \r\nce0: flags=1000843<UP,BROADCAST,RUNNING,MULTICAST,IPv4> mtu 1500 index 2\r\ninet 192.168.1.100 netmask ffffff00 broadcast 192.168.1.255\r\nether 0:3:ba:f2:9f:9a \r\nce1: flags=1000843<UP,BROADCAST,RUNNING,MULTICAST,IPv4> mtu 1500 index 3\r\ninet 192.168.2.100 netmask ffffff00 broadcast 192.168.2.255\r\nether 0:3:ba:f2:9f:9a \r\neri0: flags=1000843<UP,BROADCAST,RUNNING,MULTICAST,IPv4> mtu 1500 index 4\r\ninet 10.228.210.1 netmask ffffffc0 broadcast 10.228.210.63\r\nether 0:3:ba:f2:9f:9a \r\n\r\n请问上面的红色部分224.0.0.0是什么意思呢？

yuhuohu

组播路由，每台机器基本都有，你不用管他，当然如果没有的话就很可能出问题，有基本不会出问题