注册
登录
| 关键词： interface address flags value multicast broadcast packets example 0x00000800 0x00000001 |
This document explains the flags value in ifconfig -a output. For example: # ifconfig -a lo0: flags=1000849<UP,LOOPBACK,RUNNING,MULTICAST,IPv4> mtu 8232 index 1 inet 127.0.0.1 netmask ff000000 hme0: flags=1000843<UP,BROADCAST,RUNNING,MULTICAST,IPv4> mtu 1500 index 2 inet 129.149.141.67 netmask ffffff00 broadcast 129.149.141.255 The flags value is a hexadecimal representation of the state of the interface. Each number in the value is distinct. In the above example, both flags= values are comprised of 7 different hex values, 1,0,0,0,8,4,9. To find out what the value means, follow the chart below: For example if the flags value is 1000849, that means the interface card is: 0x00000008 + 0x00000001 = is a loopback and the card is up 0x00000040 = resources are allocated 0x00000800 = card supports multicasting ========= 0x00000849 Previous to Solaris[TM] 8, the flags value only showed three digits, e.g., flags=843. Below is the chart excerpt from /usr/include/net/if.h: 0x00000001 /* interface is up */ 0x00000002 /* broadcast address valid */ 0x00000004 /* turn on debugging */ 0x00000008 /* is a loopback net */ 0x00000010 /* interface is point-to-point link */ 0x00000020 /* avoid use of trailers */ 0x00000040 /* resources allocated */ 0x00000080 /* no address resolution protocol */ 0x00000100 /* receive all packets */ 0x00000200 /* receive all multicast packets */ 0x00000400 /* protocol code on board */ 0x00000800 /* supports multicast */ 0x00001000 /* multicast using broadcast address */ 0x00002000 /* non-unique address */ 0x00004000 /* DHCP controls this interface */ 0x00008000 /* do not advertise */ 0x00010000 /* Do not transmit packets */ 0x00020000 /* No address - just on-link subnet */ 0x00040000 /* interface address deprecated */ 0x00080000 /* address from stateless addrconf */ 0x00100000 /* router on this interface */ 0x00200000 /* No NUD on this interface */ 0x00400000 /* Anycast address */ 0x00800000 /* Do not exchange routing info */ 0x01000000 /* IPv4 interface */ 0x02000000 /* IPv6 interface */ 0x04000000 /* Mobile IP controls this interface */ 0x08000000 /* Don't failover on NIC failure */ 0x10000000 /* NIC has failed */ 0x20000000 /* Standby NIC to be used on failures */ 0x40000000 /* Standby active or not ? */ 0x80000000 /* NIC has been offlined */ |
|
声明：文章版权归原作者所有 部分文章转自互联网 如有侵权请联系
[邮箱地址] 删除
|
