Eu tenho o Windows 7 e tenho muita coisa estranha com a minha rede.
Algum tempo eu estava conectado através do roteador sem fio e meu IP era 192.168.2.103, o IP do roteador era 192.168.2.1 e outro IP era 192.168.2.100. O último que recebo da página "clientes DHCP ativos" da interface web do roteador e de "clientes sem fio" eu posso ver que 192.168.2.100 não (!) Pertencem ao meu endereço MAC. Roteador construído pelo EDimax.
Então, depois disso, desativei a função sem fio do roteador e reiniciei. Neste tempo eu não tinha ping para 192.168.2.1. Também não tive nenhuma outra conexão, nem wireless nem cabo, mas (!) Eu ainda tinha ping para 192.168.2.100 e não entendo o que é esse voodoo ...
C:\Users\Andrey>ping 192.168.2.100
Pinging 192.168.2.100 with 32 bytes of data:
Reply from 192.168.2.100: bytes=32 time<1ms TTL=128
Reply from 192.168.2.100: bytes=32 time<1ms TTL=128
Reply from 192.168.2.100: bytes=32 time<1ms TTL=128
Reply from 192.168.2.100: bytes=32 time<1ms TTL=128
Ping statistics for 192.168.2.100:
Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),
Approximate round trip times in milli-seconds:
Minimum = 0ms, Maximum = 0ms, Average = 0ms
Isso é o que eu tive:
C:\Users\Andrey>ipconfig /all
Windows IP Configuration
Host Name . . . . . . . . . . . . : Andrey-PC
Primary Dns Suffix . . . . . . . :
Node Type . . . . . . . . . . . . : Hybrid
IP Routing Enabled. . . . . . . . : No
WINS Proxy Enabled. . . . . . . . : No
Wireless LAN adapter Wireless Network Connection 3:
Media State . . . . . . . . . . . : Media disconnected
Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : Microsoft Virtual WIFI Miniport Adapter #2
Physical Address. . . . . . . . . : 06-1D-7D-40-61-EB
DHCP Enabled. . . . . . . . . . . : Yes
Autoconfiguration Enabled . . . . : Yes
Wireless LAN adapter Wireless Network Connection:
Media State . . . . . . . . . . . : Media disconnected
Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : GBabyte GN-WS50G (mini) PCI-E WLAN Card
Physical Address. . . . . . . . . : 00-1D-7D-40-61-EB
DHCP Enabled. . . . . . . . . . . : Yes
Autoconfiguration Enabled . . . . : Yes
Ethernet adapter Local Area Connection:
Media State . . . . . . . . . . . : Media disconnected
Connection-specific DNS Suffix . :
Description . . . . . . . . . . . : Marvell Yukon 88E8055 PCI-E GBabit Ethernet Controller
Physical Address. . . . . . . . . : 00-1B-24-B6-09-91
DHCP Enabled. . . . . . . . . . . : Yes
Autoconfiguration Enabled . . . . : Yes
C:\Users\Andrey>arp -a -v
Interface: 127.0.0.1 --- 0x1
Internet Address Physical Address Type
224.0.0.22 static
239.255.255.250 static
Interface: 0.0.0.0 --- 0xffffffff
Internet Address Physical Address Type
192.168.2.1 00-0e-2e-d2-8c-af invalid
192.168.2.255 Firefox-Firefox-Firefox-Firefox-Firefox-Firefox static
224.0.0.22 01-00-5e-00-00-16 static
224.0.0.252 01-00-5e-00-00-fc static
239.255.255.250 01-00-5e-7f-Firefox-fa static
255.255.255.255 Firefox-Firefox-Firefox-Firefox-Firefox-Firefox static
Interface: 0.0.0.0 --- 0xffffffff
Internet Address Physical Address Type
192.168.2.1 00-0e-2e-Firefox-f1-f6 dynamic
192.168.2.101 00-27-19-bc-8b-9c dynamic
192.168.2.102 00-16-e6-6c-ae-d4 dynamic
192.168.2.255 Firefox-Firefox-Firefox-Firefox-Firefox-Firefox static
224.0.0.22 01-00-5e-00-00-16 static
224.0.0.252 01-00-5e-00-00-fc static
239.255.255.250 01-00-5e-7f-Firefox-fa static
255.255.255.255 Firefox-Firefox-Firefox-Firefox-Firefox-Firefox static
Interface: 0.0.0.0 --- 0xffffffff
Internet Address Physical Address Type
224.0.0.22 01-00-5e-00-00-16 static
255.255.255.255 Firefox-Firefox-Firefox-Firefox-Firefox-Firefox static
C:\Users\Andrey>route print
===========================================================================
Interface List
14...06 1d 7d 40 61 eb ......Microsoft Virtual WIFI Miniport Adapter #2
13...00 1d 7d 40 61 eb ......GBabyte GN-WS50G (mini) PCI-E WLAN Card
11...00 1b 24 b6 09 91 ......Marvell Yukon 88E8055 PCI-E GBabit Ethernet Controller
1...........................Software Loopback Interface 1
===========================================================================
IPv4 Route Table
===========================================================================
Active Routes:
Network Destination Netmask Gateway Interface Metric
127.0.0.0 255.0.0.0 On-link 127.0.0.1 306
127.0.0.1 255.255.255.255 On-link 127.0.0.1 306
127.255.255.255 255.255.255.255 On-link 127.0.0.1 306
224.0.0.0 240.0.0.0 On-link 127.0.0.1 306
255.255.255.255 255.255.255.255 On-link 127.0.0.1 306
===========================================================================
Persistent Routes:
None
IPv6 Route Table
===========================================================================
Active Routes:
If Metric Network Destination Gateway
1 306 ::1/128 On-link
1 306 ff00::/8 On-link
===========================================================================
Persistent Routes:
None
Só depois de reiniciar eu perdi o ping para lá:
C:\Users\Andrey>ping 192.168.2.100
Pinging 192.168.2.100 with 32 bytes of data:
PING: transmit failed. General failure.
PING: transmit failed. General failure.
PING: transmit failed. General failure.
PING: transmit failed. General failure.
Ping statistics for 192.168.2.100:
Packets: Sent = 4, Received = 0, Lost = 4 (100% loss),
Então, o que é esse misterioso cache?