SIOCGIFBRDADDR Bcast:0.0.0.0 Mask:255.255.255.255

本文深入探讨了计算机网络中32位掩码的作用,解释了广播地址为何为全零的原因,以及这种配置对于网络通信的影响。

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ge3         Link encap:Ethernet  HWaddr 04:8B:42:10:1D:43  
            inet addr:6.6.6.6  Bcast:0.0.0.0  Mask:255.255.255.255
            inet6 addr: fe80::48b:4200:d10:1d43/64 Scope:Link
            UP BROADCAST MULTICAST  MTU:1500  Metric:1
            RX packets:0 errors:0 dropped:0 overruns:0 frame:0
            TX packets:1 errors:0 dropped:0 overruns:0 carrier:0
            collisions:0 txqueuelen:0 


32位掩码,广播地址为0.....why?是不是表示没有广播地址呢?
[root@D2000V]:~#arp -s 192.168.2.100 00:0c:29:12:34:78 arp: SIOCSARP: Invalid argument [root@D2000V]:~#ifconfig eth0 Link encap:Ethernet HWaddr 3C:6A:2C:3C:6A:60 inet addr:192.168.1.131 Bcast:192.168.1.255 Mask:255.255.255.0 inet6 addr: fe80::3e6a:2cff:fe3c:6a60/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:2009 errors:0 dropped:0 overruns:0 frame:0 TX packets:1950 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:193137 (188.6 KiB) TX bytes:195173 (190.5 KiB) Interrupt:20 Base address:0x2000 eth1 Link encap:Ethernet HWaddr D2:A9:33:E0:DA:91 inet addr:192.168.2.3 Bcast:192.168.2.255 Mask:255.255.255.0 inet6 addr: fe80::d0a9:33ff:fee0:da91/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:3 errors:0 dropped:0 overruns:0 frame:0 TX packets:25 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:190 (190.0 B) TX bytes:2032 (1.9 KiB) Interrupt:23 eth2 Link encap:Ethernet HWaddr 9E:53:C1:8E:09:0B inet addr:192.168.3.3 Bcast:192.168.3.255 Mask:255.255.255.0 inet6 addr: fe80::9c53:c1ff:fe8e:90b/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:0 errors:0 dropped:0 overruns:0 frame:0 TX packets:11 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:0 (0.0 B) TX bytes:910 (910.0 B) Interrupt:27 Base address:0x2000 lo Link encap:Local Loopback inet addr:127.0.0.1 Mask:255.0.0.0 inet6 addr: ::1/128 Scope:Host UP LOOPBACK RUNNING MTU:65536 Metric:1 RX packets:6808 errors:0 dropped:0 overruns:0 frame:0 TX packets:6808 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:520761 (508.5 KiB) TX bytes:520761 (508.5 KiB) refvnet Link encap:UNSPEC HWaddr 00-00-00-00-00-00-00-00-00-00-00-00-00-00-00-00 inet addr:192.168.2.133 P-t-P:192.168.2.133 Mask:255.255.255.0 inet6 addr: fe80::1e53:3ab1:427f:1e91/64 Scope:Link UP POINTOPOINT RUNNING NOARP MULTICAST MTU:1600 Metric:1 RX packets:0 errors:0 dropped:0 overruns:0 frame:0 TX packets:8 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:500 RX bytes:0 (0.0 B) TX bytes:384 (384.0 B)
最新发布
07-06
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