[lvs-users] Ignoring ARP on *all* interfaces? Docs seem to say so

Henry C. henka at cityweb.co.za
Sat Oct 15 07:14:32 BST 2011


>From the documentation, one way to fix the ARP problem:

# LVS:  prevent this server from replying to ARP requests for the VIP
# and bypassing the director.
net.ipv4.conf.lo.arp_ignore = 1
net.ipv4.conf.lo.arp_announce = 2
net.ipv4.conf.all.arp_ignore = 1
net.ipv4.conf.all.arp_announce = 2
net.ipv4.conf.tunl0.arp_ignore = 1

This seems to work well, but I'm curious about the line:

net.ipv4.conf.all.arp_ignore = 1

Will this not affect the other non-VIP interfaces on the realserver?  This
line seems to imply that ALL interfaces will not respond to ARPs...  Also, why
ignore ARPs on loopback (lo)?

It just seems counter-intuitive.


More information about the lvs-users mailing list