LINUX查看网卡带宽（100M还是1000M）命令

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e5D0如何不被忽悠？linux/centos如何查看网卡是100M还是1000M？检查100兆还是千兆（1GBPS）带宽接入，请看下面命令51Testing软件测试网E5J'yVu,^j`

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\F!W7lr0[root@www.ctohome.com]# mii-tool -V51Testing软件测试网"D)S(\{y
mii-tool.c 1.9 2000/04/28 00:56:08 (David Hinds)
\;lH&CTB0SIOCGMIIREG on eth0 failed: Input/output error51Testing软件测试网"U D$g6sP9q
eth0: negotiated 100baseTx-FD, link ok

es:f*\9X&sQ}8o0[root@www.ctohome.com]#mii-tool -v51Testing软件测试网Ux-A:|*o,? _~
SIOCGMIIREG on eth0 failed: Input/output error
)ZRs Tk(e2HN0eth0: negotiated 100baseTx-FD, link ok

{T3S5b/U7I5d0  product info: vendor 00:aa:00, model 57 rev 0
:oSiR^J1|0  basic mode:   autonegotiation enabled
i7SNN1e)B |0  basic status: autonegotiation complete, link ok51Testing软件测试网NV]*{UaR6h$N
  capabilities: 100baseTx-FD 100baseTx-HD 10baseT-FD 10baseT-HD
;t4f*B:` ]ik'PU0  advertising:  100baseTx-FD 100baseTx-HD 10baseT-FD 10baseT-HD flow-control51Testing软件测试网|Z q$mZDH
  link partner: 100baseTx-FD 100baseTx-HD 10baseT-FD 10baseT-HD51Testing软件测试网%Z
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#`7zFmC4BX:l6bu0[root@www.ctohome.com]#ethtool eth0
|?4LK,Y2~\0Settings for eth0:
.J0Q N'\fUX0        Supported ports: [ TP ]51Testing软件测试网[xX7?']
        Supported link modes:   10baseT/Half 10baseT/Full
JL+Ze8rG5gJ1b{0                                100baseT/Half 100baseT/Full
T;AO$QZd0                                1000baseT/Full
@P~o L4D/X(W0n0        Supports auto-negotiation: Yes
P7lZ"T3i$G+m bn2M0        Advertised link modes:  10baseT/Half 10baseT/Full51Testing软件测试网z!`4s|(mP:d
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                                100baseT/Half 100baseT/Full
7Y} D'WG&@2g:sV0                                1000baseT/Full51Testing软件测试网J{5M x4vQ.S,T8`
        Advertised auto-negotiation: Yes
k&lT[+H ~0        Speed: 100Mb/s51Testing软件测试网*GZt!k,c8Nh4SD
        Duplex: Full51Testing软件测试网)`Q6_+H E!n
        Port: Twisted Pair51Testing软件测试网C2v;S ]ZMQ8?(X
        PHYAD: 151Testing软件测试网+~f9d,kQ-fi
        Transceiver: internal51Testing软件测试网F/JD*[*\'vg3SZ
        Auto-negotiation: on
'_P(d@]fuNR0        Supports Wake-on: pumbag
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OZTT0        Wake-on: g51Testing软件测试网7PL i[R
        Current message level: 0x00000001 (1)
[p'rK}Gc)p0        Link detected: yes

要测试是否是1000M端口，最保险的说用wget测试一个对方的带宽足够大的下载地址：51Testing软件测试网Sb0xi2kt*O%s

r{*me7~0ae~4d0wget http://cachefly.cachefly.net/100mb.test51Testing软件测试网Q+p1FT;ot9~j
--2011-03-14 22:19:12--  http://cachefly.cachefly.net/100mb.test
c&Jd|8B[ Jc0Resolving cachefly.cachefly.net... 205.234.175.17551Testing软件测试网"J9lA T ]:x{,f%ch8a
Connecting to cachefly.cachefly.net|205.234.175.175|:80... connected.51Testing软件测试网7J ]V2e2Ugg]
HTTP request sent, awaiting response... 200 OK51Testing软件测试网 hd0D}Wy?7p+rA
Length: 104857600 (100M) [application/octet-stream]
;u4PM#d | b:m FP T#R0Saving to: `100mb.test.2'
#Y7oa-fnOOK$ap
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OQ;y(?/L3s0100%[===================================================================================================================>] 104,857,600 39.1M/s   in 2.6s   
R-I9}x7B/y&`6s(h.^051Testing软件测试网Jb'U \)a.pd*p!n
2011-03-14 22:19:14 (39.1 MB/s) - `100mb.test.2' saved [104857600/104857600]51Testing软件测试网5C%^4C0j%M ?

如果下载速度能超过15MB/s，那么不是100M端口了，通常就是1000M端口51Testing软件测试网4X0r-C
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+ia gk Dx0如果是独立服务器，可以通过下面命令核查网卡端口：

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[root@www.ctohome.com ]#ethtool eth051Testing软件测试网!Xux1I!gb)}d
Settings for eth0:
(vyCkr.lnM0        Supported ports: [ TP ]
L8o?4u1tV0C1~0        Supported link modes:   10baseT/Half 10baseT/Full51Testing软件测试网(nX8v ?k(W
                                100baseT/Half 100baseT/Full
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U0                                1000baseT/Full51Testing软件测试网1|U)xy&q"I
        Supports auto-negotiation: Yes
bm.hd i+\ny0        Advertised link modes:  10baseT/Half 10baseT/Full51Testing软件测试网2s-O,@Uv'wf
                                100baseT/Half 100baseT/Full51Testing软件测试网1aI;w5]3QWI
                                1000baseT/Full51Testing软件测试网E/L O@(DdZ0I
        Advertised auto-negotiation: Yes51Testing软件测试网\$MTz(k
       Speed: 1000Mb/s
~Q3}3?
w{$p0        Duplex: Full
:c&T| ~o!B&nheS0        Port: Twisted Pair51Testing软件测试网 i~!CIn
        PHYAD: 151Testing软件测试网?-Ubc'fe s
        Transceiver: internal51Testing软件测试网/j*Qjk \ MY zP
        Auto-negotiation: on
:[8k[?v%sc-}0        Supports Wake-on: pumbag
MbNJ;\#Skj8a,d0        Wake-on: g51Testing软件测试网Eo9tT'V"P!I5z|gnD
        Current message level: 0x00000001 (1)
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O[`6xHu0        Link detected: yes