关于Linux和Windows中的MTU
作者 佚名技术
来源 Linux系统
浏览
发布时间 2012-04-26
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红色为命令和注释、修改后的MTU,蓝色的为修改前的MTU
Linux中设置MTU值的三种方法：
[root@localhost ~]# ifconfig //查看网卡信息
eth0 Link encap:Ethernet HWaddr 00:0C:29:0C:B8:6A
inet addr:192.168.10.1 Bcast:192.168.10.255 Mask:255.255.255.0
inet6 addr: fe80::20c:29ff:fe0c:b86a/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:1948 errors:0 dropped:0 overruns:0 frame:0
TX packets:87 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:208651 (203.7 KiB) TX bytes:17782 (17.3 KiB)
Interrupt:169 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:16436 Metric:1
RX packets:7442 errors:0 dropped:0 overruns:0 frame:0
TX packets:7442 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:9177752 (8.7 MiB) TX bytes:9177752 (8.7 MiB)
第一种：
[root@localhost ~]# ifconfig eth0 mtu 1492
eth0 Link encap:Ethernet HWaddr 00:0C:29:0C:B8:6A
inet addr:192.168.10.1 Bcast:192.168.10.255 Mask:255.255.255.0
inet6 addr: fe80::20c:29ff:fe0c:b86a/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1492 Metric:1
RX packets:1948 errors:0 dropped:0 overruns:0 frame:0
TX packets:87 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:208651 (203.7 KiB) TX bytes:17782 (17.3 KiB)
Interrupt:169 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:16436 Metric:1
RX packets:7442 errors:0 dropped:0 overruns:0 frame:0
TX packets:7442 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:9177752 (8.7 MiB) TX bytes:9177752 (8.7 MiB)
[root@localhost ~]#
第二种方法：
[root@localhost ~]# ip link list
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 16436 qdisc noqueue
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast qlen 1000
link/ether 00:0c:29:0c:b8:6a brd ff:ff:ff:ff:ff:ff
3: sit0: <NOARP> mtu 1480 qdisc noop
link/sit 0.0.0.0 brd 0.0.0.0
[root@localhost ~]# ip link set dev eth0 mtu 1492
[root@localhost ~]# ip link list
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 16436 qdisc noqueue
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1492 qdisc pfifo_fast
qlen 1000
link/ether 00:0c:29:0c:b8:6a brd ff:ff:ff:ff:ff:ff
3: sit0: <NOARP> mtu 1480 qdisc noop
link/sit 0.0.0.0 brd 0.0.0.0
至于为什么Windows中MTU是1492,是 我的是ADSL拨号(pppoe)上网的,不是1492可能有些网页无法游览.MTU最大值在以太网帧中是1500字节. |
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