Setup linux test client: Difference between revisions

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To make it apllied immediatly you can set:
To make it apllied immediatly you can set:
  root@myLVS-LinuxClient:~# echo "1" > /proc/sys/net/ipv4/conf/eth0/arp_ignore
  root@myLVS-LinuxClient:~# '''echo "1" > /proc/sys/net/ipv4/conf/eth0/arp_ignore'''
  root@myLVS-LinuxClient:~# echo "2" > /proc/sys/net/ipv4/conf/eth0/arp_announce
  root@myLVS-LinuxClient:~# '''echo "2" > /proc/sys/net/ipv4/conf/eth0/arp_announce'''
  root@myLVS-LinuxClient:~# echo "1" > /proc/sys/net/ipv4/conf/all/arp_ignore
  root@myLVS-LinuxClient:~# '''echo "1" > /proc/sys/net/ipv4/conf/all/arp_ignore'''
  root@myLVS-LinuxClient:~# echo "2" > /proc/sys/net/ipv4/conf/all/arp_announce
  root@myLVS-LinuxClient:~# '''echo "2" > /proc/sys/net/ipv4/conf/all/arp_announce'''





Revision as of 21:20, 4 July 2015

Linux Test setup, it has been tested on

  • Debian 8
  • Apache 2.4
  • Hostname used for the test: myLVS-LinuxClient

System settings to configure the loop back adapter

To make the change permanent you may edit /etc/sysctl.conf and add:

net.ipv4.conf.eth0.arp_ignore = 1
net.ipv4.conf.eth0.arp_announce = 2
net.ipv4.conf.all.arp_ignore = 1
net.ipv4.conf.all.arp_announce = 2


To make it apllied immediatly you can set:

root@myLVS-LinuxClient:~# echo "1" > /proc/sys/net/ipv4/conf/eth0/arp_ignore
root@myLVS-LinuxClient:~# echo "2" > /proc/sys/net/ipv4/conf/eth0/arp_announce
root@myLVS-LinuxClient:~# echo "1" > /proc/sys/net/ipv4/conf/all/arp_ignore
root@myLVS-LinuxClient:~# echo "2" > /proc/sys/net/ipv4/conf/all/arp_announce


Add to /etc/rc.local to automatic load the loop back adapter:

/sbin/ifconfig lo:0 192.168.2.220 -arp netmask 255.255.255.255 up

ifconfig should look like:

root@myLVS-LinuxClient:~# ifconfig
eth0     Link encap:Ethernet  HWaddr 08:00:27:89:f3:8d
         inet addr:192.168.2.222  Bcast:255.255.255.255  Mask:255.255.255.0
         inet6 addr: fe80::a00:27ff:fe89:f38d/64 Scope:Link
         UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
         RX packets:1646 errors:0 dropped:2 overruns:0 frame:0
         TX packets:356 errors:0 dropped:0 overruns:0 carrier:0
         collisions:0 txqueuelen:1000
         RX bytes:153233 (149.6 KiB)  TX bytes:105801 (103.3 KiB)
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:32 errors:0 dropped:0 overruns:0 frame:0
         TX packets:32 errors:0 dropped:0 overruns:0 carrier:0
         collisions:0 txqueuelen:0
         RX bytes:1920 (1.8 KiB)  TX bytes:1920 (1.8 KiB)
lo:0     Link encap:Local Loopback
         inet addr:192.168.2.220  Mask:255.255.255.255
         UP LOOPBACK RUNNING  MTU:65536  Metric:1

Testing the loop back adapter


Switch off the first (Windows) client to make Linux as the only web server



The new myLVS overview should now show the disabled (Windows) server marked with a red cross:


Use a network client and open the URL http://192.168.2.220, we should now see the result of web02 (because web01 is off)
There should be the Linux/Debian default web page