ARP Issues in LVS/DR and LVS/TUN Clusters

Problems

In the LVS/DR and LVS/TUN clusters, we can see that the VIP address is shared by load balancer and all real servers. In order to make the LVS/DR and LVS/TUN clusters work, load balancer should broadcast the VIP address to accept incoming packets for virtual service, the real servers only use the VIP address to process the packets for VIP locally.

Solutions

• arptables
• The arp_announce/arp_ignore approach
• The hidden patch
• The redirect approach
• The policy routing approach
• The noarp module

References

• http://www.linuxvirtualserver.org/docs/arp.html