Hi --
I have an LVS-DR cluster that has been running for years; its realservers
have linux 2.4 kernels and I use the noarp module to hide the VIP. I now
want to add realservers with 2.6 kernels (2.6.20 at the moment), and am
attempting to use arp_ignore and arp_announce to solve the arp problem as
follows:
# from sysctl.conf
net.ipv4.conf.all.arp_ignore = 1
net.ipv4.conf.all.arp_announce = 2
net.ipv4.conf.eth0.arp_ignore=1
net.ipv4.conf.eth1.arp_ignore = 1
net.ipv4.conf.eth0.arp_announce = 2
net.ipv4.conf.eth1.arp_announce = 2
eth0 and eth1 both have real network interfaces; there are no others. I
gather I'm supposed to add the VIP nowadays on lo. So, having enabled the
above options, I attempt to add the VIP like so:
ifconfig lo:0 $VIP
When this happens, the existing interfaces go beserk; my ssh connection to
the machine begins to drop most packets, and I am lucky to get enough
packets across to bring down lo:0, which restores the network to sanity.
Using iproute2:
ip address add $VIP dev lo
the same thing occurs, and is remedied the same way (by taking the VIP off
the lo interface).
Is it obvious to anyone what I am doing wrong?
Thanks in advance for any help,
Jacob Smullyan
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