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linux 下网关MAC的查看和配置arp命令

linux 下网关MAC的查看和配置arp命令-「腾达签名」

linux 下网关MAC的查看和配置arp命令:

[root@localhost ~]$ arp
Address                 HWtype  HWaddress           Flags Mask            Iface
203.171.xx.xx           ether   00:D0:D3:3B:23:A8   C                     eth0
203.171.xx.ab           ether   00:16:76:74:45:A1   C                     eth0
203.171.xx.ac           ether   00:16:76:74:45:A1   C                     eth1
[root@localhost ~]$ arp -a
? (203.171.xx.xx) at 00:D0:D3:3B:23:A8 [ether] . eth0
? (203.171.xx.ab) at 00:16:76:74:45:A1 [ether] . eth0
? (203.171.xx.ac) at 00:16:76:74:45:A1 [ether] . eth1
[root@localhost ~]$ arp -h
Usage:
arp [-vn]  [<HW>] [-i <if>] [-a] [<hostname>]             <-Display ARP cache
arp [-v]          [-i <if>] -d  <hostname> [pub][nopub]    <-Delete ARP entry
arp [-vnD] [<HW>] [-i <if>] -f  [<filename>]              <-Add entry from file
arp [-v]   [<HW>] [-i <if>] -s  <hostname> <hwaddr> [temp][nopub] <-Add entry
arp [-v]   [<HW>] [-i <if>] -s  <hostname> <hwaddr> [netmask <nm>] pub  <-''-
arp [-v]   [<HW>] [-i <if>] -Ds <hostname> <if> [netmask <nm>] pub      <-''-
-a                       display (all) hosts in alternative (BSD) style
-e                       display (all) hosts in default (Linux) style
-s, --set                set a new ARP entry        -d, --delete             delete a specified entry        
-v, --verbose            be verbose
-n, --numeric            don't resolve names
-i, --device             specify network interface (e.g. eth0)
-D, --use-device         read <hwaddr> from given device
-A, -p, --protocol       specify protocol family
-f, --file               read new entries from file or from /etc/ethers
<HW>=Use '-H <hw>' to specify hardware address type. Default: ether
List of possible hardware types (which support ARP):
strip (Metricom Starmode IP) ash (Ash) ether (Ethernet)
tr (16/4 Mbps Token Ring) tr (16/4 Mbps Token Ring (New)) ax25 (AMPR AX.25)
netrom (AMPR NET/ROM) rose (AMPR ROSE) arcnet (ARCnet)
dlci (Frame Relay DLCI) fddi (Fiber Distributed Data Interface) hippi (HIPPI)
irda (IrLAP) x25 (generic X.25) infiniband (InfiniBand)
[root@localhost ~]$ cat /etc/ethers
cat: /etc/ethers: No such file or directory

添加静态项.这个很有用,特别是局域网中中了arp病毒以后:

$arp -s 123.123.123.111 00:11:56:6F:87:D3
$arp -a #显示 ARP 表.

但是arp -s 设置的静态项在用户登出之后或重起之后会失效,如果想要任何时候都不失效,可以将ip和mac的对应关系写入arp命令默认的配置文件/etc/ethers中.
例如:

$vi /etc/ethers
arp -s 123.123.123.111 00:11:56:6F:87:D3
$arp -f /etc/ethers

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linux 下网关MAC的查看和配置arp命令-「腾达签名」
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