This 'dual active condition' commonly occurs when the switching environment does not properly support the communications used for HA. The NIOS Administrators Guide includes steps to verify which should help resolve this issue:
Configuring the Connecting Switch
To ensure that VRRP (Virtual Router Redundancy Protocol) works properly, configure the following settings at the port level for all the connecting switch ports (HA, LAN1, and LAN2):
- Spanning Tree Protocol: Disable this or enable this with Portfast. For vendor specific information, search for "HA" in the Infoblox Knowledge Base system at https://support.infoblox.com.
- Trunking: Disable
- EtherChannel: Disable
- IGMP Snooping: Disable
- DHCP Snooping: Disable or Enable Trust Interface
Note: You must disable DHCP Snooping to successfully run DHCP services on the Grid. For more information about DHCP services, see About Infoblox DHCP Services.
- Port Channeling: Disable
Note: If VLAN tagging in enabled on an Infobolox HA appliance, you must enable trunking at the port level.
- Speed and Duplex settings: Match these settings on both the Infoblox appliance and switch
- Disable other dynamic and proprietary protocols that might interrupt the forwarding of packets
Once any outstanding issues are resolved, the two nodes should automatically sort themselves out. If you continue to see any issues, be sure to reach out to Infoblox Support and they can help walk through the troubleshooting steps a bit better.
Regards,
Tony
