On Fri, 2010-04-23 at 16:25 -0700, Gary Smith wrote: > I added a new alias to lo > > /etc/sysconfig/networks-scripts/ifcfg-lo:0 > DEVICE=lo:0 > IPADDR=10.80.55.13 > NETMASK=255.255.255.255 > > When I issue service network restart I get: > > Bringing up loopback interface: SIOCADDRT: Network is unreachable > > Running ip addr I get the addresses expected. Should I be concerned about > this? Is there something I need to do differently to the alias file that I'm > missing?
Don't use the network-scripts file to configure the loopback adapter. It will send out an unwanted arp broadcast to determine if the address is already in use (in the case of LVS-DR, it probably is) and refuse to come up. Also, the arp table on other nodes will be incorrect since the MAC address associated with the VIP should only exist for the interface configured on the director. Configure the loopback device by putting these lines in your /etc/rc.local file : # solve the ARP problem echo 1 > /proc/sys/net/ipv4/conf/lo/arp_ignore echo 1 > /proc/sys/net/ipv4/conf/eth0/arp_ignore echo 2 > /proc/sys/net/ipv4/conf/lo/arp_announce echo 2 > /proc/sys/net/ipv4/conf/eth0/arp_announce # Bring up loopback interface ifconfig lo:0 10.80.55.13 broadcast 10.80.55.13 netmask 0xffffffff up You can check if you configured it correctly by doing an 'arping VIP' from a client (not the director / realserver!) and watching the output. You should see replies coming from one MAC address. This would be the MAC of the interface on the director that's serving the VIP. (i should really make a template from this mail ...) Léon _______________________________________________ Please read the documentation before posting - it's available at: http://www.linuxvirtualserver.org/ LinuxVirtualServer.org mailing list - lvs-users@LinuxVirtualServer.org Send requests to lvs-users-requ...@linuxvirtualserver.org or go to http://lists.graemef.net/mailman/listinfo/lvs-users
