Configure a bridge script in linux

#! /Bin/sh & nbsp; ######################################## ######################## function: createlinuxbridge, centos5testpass. & nbsp; # user: chenjian # date: 2011-06-30 ^ _#! /Bin/sh
 
######################################## ######################
#
# Function: create linux bridge, centos 5 test pass.
# User: chenjian
# Date: 2011-06-30 ^_^.
#
######################################## ######################
 
NETWORK_DIR =/etc/sysconfig/network-scripts
 
If! 'Rpm-qi bridge-utils>/dev/Null ';
Then
Echo "bridge-utils package not install ."
Fi
 
Rm-rf $ NETWORK_DIR/ifcfg-br *
Read-p "Input your bridge name, ex br0 :"
 
If ['echo $ REPLY | wc-L'-eq 0];
Then
REPLY = br0
Fi
 
BRIDGE = $ REPLY
ETHERNET_ALL = $ (ls-l $ NETWORK_DIR | awk-F-/ifcfg-eth/{print $8 })
 
While ['echo $ REPLY | wc-W'-lt 2];
Do
Read-p "Input you need to use the network adapter, separated by a space. current cards ('echo $ ETHERNET_ALL '), chose two :"
 
Done
 
ETHERNET = $ REPLY
 
For I in 'seq 1 3 ';
Do
Read-p "Input the bridge ip address and netmask. separated by a space :"
If ['echo $ REPLY | wc-L'-eq 0];
Then
Echo "Input empty. this bridage will no ip address ."
REPLY = "0.0.0.0 0.0.0.0"
Sleep 3
Break
Elif 'echo $ REPLY | grep-v [0-9].>/dev/Null ';
Then
Echo "Use only numbers and points ."
Elif ['echo $ REPLY | awk {print $2} | wc-L'-eq 0]
Then
Echo "Input errors, exit ."
Exit 2
Else
Break
Fi
Done
 
IP = 'echo $ REPLY | awk {print $1 }'
NETMASK = 'echo $ REPLY | awk {print $2 }'
 
 
Brctl addbr $ BRIDGE
 
Cat> $ NETWORK_DIR/ifcfg-$ BRIDGE <-EOF
DEVICE = $ BRIDGE
BOOTPROTO = static
ONBOOT = yes
NETMASK = $ NETMASK
IPADDR = $ IP
TYPE = Bridge
EOF
 
Echo -------------------------------------
Echo "Bridge info"
Echo -------------------------------------
 
Cat $ NETWORK_DIR/ifcfg-$ BRIDGE
Echo ""
For I in 'echo $ ETHERNET ';
Do
 
MAC =$ (ifconfig $ I | awk/HWaddr/{print $ NF })
Cat> $ NETWORK_DIR/ifcfg-$ I < DEVICE = $ I
HWADDR = $ MAC
BOOTPROTO = none
ONBOOT = yes
HOTPLUG = no
TYPE = Ethernet
BRIDGE = $ BRIDGE
EOF
 
Echo -------------------------------------
Echo "$ I info"
Echo -------------------------------------
Cat $ NETWORK_DIR/ifcfg-$ I
Echo ""
 
Done
Echo ""
 
Echo -------------------------------------
Echo-e "install successful, you need to restart your network"
Echo -------------------------------------
 
Exit 0;