|
0
|
0
|
Echo Reply——回显应答（Ping应答）
|
x
|
|
|
3
|
0
|
Network Unreachable——网络不可达
|
|
x
|
|
3
|
1
|
Host Unreachable——主机不可达
|
|
x
|
|
3
|
2
|
Protocol Unreachable——协议不可达
|
|
x
|
|
3
|
3
|
Port Unreachable——端口不可达
|
|
x
|
|
3
|
4
|
Fragmentation needed but no frag. bit set——需要进行分片但设置不分片比特
|
|
x
|
|
3
|
5
|
Source routing failed——源站选路失败
|
|
x
|
|
3
|
6
|
Destination network unknown——目的网络未知
|
|
x
|
|
3
|
7
|
Destination host unknown——目的主机未知
|
|
x
|
|
3
|
8
|
Source host isolated (obsolete)——源主机被隔离（作废不用）
|
|
x
|
|
3
|
9
|
Destination network administratively prohibited——目的网络被强制禁止
|
|
x
|
|
3
|
10
|
Destination host administratively prohibited——目的主机被强制禁止
|
|
x
|
|
3
|
11
|
Network unreachable for TOS——由于服务类型TOS，网络不可达
|
|
x
|
|
3
|
12
|
Host unreachable for TOS——由于服务类型TOS，主机不可达
|
|
x
|
|
3
|
13
|
Communication administratively prohibited by filtering——由于过滤，通信被强制禁止
|
|
x
|
|
3
|
14
|
Host precedence violation——主机越权
|
|
x
|
|
3
|
15
|
Precedence cutoff in effect——优先中止生效
|
|
x
|
|
4
|
0
|
Source quench——源端被关闭（基本流控制）
|
|
|
|
5
|
0
|
Redirect for network——对网络重定向
|
|
|
|
5
|
1
|
Redirect for host——对主机重定向
|
|
|
|
5
|
2
|
Redirect for TOS and network——对服务类型和网络重定向
|
|
|
|
5
|
3
|
Redirect for TOS and host——对服务类型和主机重定向
|
|
|
|
8
|
0
|
Echo request——回显请求（Ping请求）
|
x
|
|
|
9
|
0
|
Router advertisement——路由器通告
|
|
|
|
10
|
0
|
Route solicitation——路由器请求
|
|
|
|
11
|
0
|
TTL equals 0 during transit——传输期间生存时间为0
|
|
x
|
|
11
|
1
|
TTL equals 0 during reassembly——在数据报组装期间生存时间为0
|
|
x
|
|
12
|
0
|
IP header bad (catchall error)——坏的IP首部（包括各种差错）
|
|
x
|
|
12
|
1
|
Required options missing——缺少必需的选项
|
|
x
|
|
13
|
0
|
Timestamp request (obsolete)——时间戳请求（作废不用）
|
x
|
|
|
14
|
|
Timestamp reply (obsolete)——时间戳应答（作废不用）
|
x
|
|
|
15
|
0
|
Information request (obsolete)——信息请求（作废不用）
|
x
|
|
|
16
|
0
|
Information reply (obsolete)——信息应答（作废不用）
|
x
|
|
|
17
|
0
|
Address mask request——地址掩码请求
|
x
|
|
|
18
|
0
|
Address mask reply——地址掩码应答
|
x
|
