Failover does not work, both proxy on Master and Master

Products

• Advanced Secure Gateway Software - ASG
• SG-S500
• SG-S400
• Secure Web Gateway Virtual Appliance
• SG-S200

Issue/Introduction

Why does failover does not work when both proxy are in "Master" state?

Resolution

Solution is ensure multicast address is configured with 224.0.0.x segment as some switch does not accept other multicast address.