Direct Routing stop working after update

[akhen]

We used an IPVS solution to load share web connection on 2 apache.

Recently I made a gentoo update (emerge -upD world) on one of the apache server , now running 2.6.11-gentoo-r11
Since this it seems this server stop answer to DR packet.

I used this config to do that:
echo '1' > /proc/sys/net/ipv4/conf/all/arp_ignore
echo '2' > /proc/sys/net/ipv4/conf/all/arp_ignore
ifconfig dummy0 193.XX.XX.236 netmask 255.255.255.255 broadcast 193.XX.XX.237 up
echo '1' > /proc/sys/net/ipv4/conf/dummy0/arp_ignore
echo '2' > /proc/sys/net/ipv4/conf/dummy0/arp_announce

On the other apache (older gentoo 2.6.10-gentoo-r4) , this solution is working.

Any Idea what could on recent gentoo update, stoped DR routing??

EDIT: It doesn't seems kernel related cause, revert back the kernel change nothings.

EDIT2: Ok The problem seems to be in new directives of /etc/sysctl.conf (reverting to old sysctl.conf works)

Thx