# Virtual networking with 2 Servers **URL:** \ **Category:** SLES High Availability Extension\ **Created:** [May 31, 2013, 1:45pm UTC](https://forums.suse.com/t/virtual-networking-with-2-servers/24020 "2013-05-31T13:45:28Z")\ **Posts on this page:** 1\ **Page:** 1
**Author:** ![TheoV](https://avatars.discourse-cdn.com/v4/letter/t/aca169/32.png) [@TheoV](https://forums.suse.com/u/TheoV)\ **Post date:** [May 31, 2013, 1:45pm UTC](https://forums.suse.com/t/virtual-networking-with-2-servers/24020/1 "2013-05-31T13:45:28Z")
The idea is to have 2 servers each with 2 ethernetcards and a ilo interface, that can be switched manually by bringing the inferface eth1 up on 1 side and down on the other side. All looks good i can switch from system1 tot system2 and backwards without any problems, all networkinterfaces can be reached with ssh. However after a period of network inactivity the virtual interface cannot be reached anymore with a ssh session, but iam still able to ping all interfaces i thougt in stead of ssh lets try telnet on the virtual ip that gives me login, if anyone has a idea it would help me allot.’ This is what i did to get this up and running: On Linux are no extra packages installed This is the configuration System1 HP Proliant DL360 G6 Virtual Status inactive system1:/etc/sysconfig/network # cat routes default 10.76.35.10 - - added the following lines to /etc/sysctl.conf # for the VIP Interface net.ipv4.conf.all.arp\_ignore = 1 net.ipv4.conf.all.arp\_announce = 2 contents of the /etc/sysconfig/network/ifcfg-eth0 BOOTPROTO=‘static’ BROADCAST=‘10.76.35.255’ ETHTOOL\_OPTIONS=‘’ IPADDR=‘10.76.35.42’ MTU=‘’ NAME=‘’ NETMASK=‘255.255.255.0’ NETWORK=‘10.76.35.0’ REMOTE\_IPADDR=‘’ STARTMODE=‘onboot’ UNIQUE=‘rBUF.E2l3+2nwDtC’ USERCONTROL=‘no’ \_nm\_name=‘bus-pci-0000:02:00.0’ contents of the /etc/sysconfig/network/ifcfg-eth1 BOOTPROTO=‘static’ BROADCAST=‘10.76.35.255’ ETHTOOL\_OPTIONS=‘’ IPADDR=‘10.76.35.41’ MTU=‘’ NAME=‘’ NETMASK=‘255.255.255.0’ NETWORK=‘10.76.35.0’ REMOTE\_IPADDR=‘’ STARTMODE=‘off’ USERCONTROL=‘no’ ================================= System2 HP Proliant DL360 G5 Virtual Status Active system2:/etc/sysconfig/network # cat routes default 10.76.35.10 - - added the following lines to /etc/sysctl.conf # for the VIP Interface net.ipv4.conf.all.arp\_ignore = 1 net.ipv4.conf.all.arp\_announce = 2 contents of the /etc/sysconfig/network/ifcfg-eth0 BOOTPROTO=‘static’ BROADCAST=‘10.76.35.255’ ETHTOOL\_OPTIONS=‘’ IPADDR=‘10.76.35.44’ MTU=‘’ NAME=‘’ NETMASK=‘255.255.255.0’ NETWORK=‘10.76.35.0’ REMOTE\_IPADDR=‘’ STARTMODE=‘onboot’ UNIQUE=‘rBUF.sWQdX4kVaYC’ USERCONTROL=‘no’ \_nm\_name=‘bus-pci-0000:03:00.0’ contents of the /etc/sysconfig/network/ifcfg-eth1 BOOTPROTO=‘static’ BROADCAST=‘10.76.35.255’ ETHTOOL\_OPTIONS=‘’ IPADDR=‘10.76.35.41’ MTU=‘’ NAME=‘’ NETMASK=‘255.255.255.0’ NETWORK=‘10.76.35.0’ REMOTE\_IPADDR=‘’ STARTMODE=‘onboot’ USERCONTROL=‘no’ LLADDR=‘D8:D3:85:E1:B4:E1’ The Hardware LLADDR is the physical from system1 eth1, if switching is being done the interface eth1 of system1 will set down the next step is to bring interface1 of system 2 up.