By default, an Infoblox appliance automatically negotiates the optimal connection speed and transmission type (full or half duplex) on the physical links between its LAN1, LAN2, HA, and MGMT ports and the Ethernet ports on a connecting switch or load balancer.
Occasionally, the appliances may fail to auto-negotiate that speed and type, and instead connect at lower speeds of either 100 or 10 Mbps using potentially mismatched full- and half-duplex transmissions. If this occurs, begin by determining whether there is a firmware upgrade available for the switch. If so, apply the firmware upgrade to the switch and test the connection. If that does not resolve the issue, manually set the ports on the Infoblox appliance and on the switch to make 1000-Mbps full-duplex connections. See the section Modifying Ethernet Port Settings in the Infoblox NIOS Administrator Guide for the steps to resolve the problem.
You can use the LAN1 and LAN2 Ethernet interfaces on the system for DNS query traffic.
- To ensure correct operation, configure the following settings at the port level for all the connecting switch ports (to LAN1, LAN2, and HA where applicable):
- Spanning Tree Protocol: Disable.
- Trunking: Disable.
- EtherChannel: Disable.
- IGMP Snooping: Disable.
- Port Channeling: Disable.
- Speed and Duplex settings: Match settings on both the Infoblox appliance and switch or load balancer.
- Disable other dynamic and proprietary protocols that might interrupt the forwarding of packets.
- Use the Infoblox GUI to access the Infoblox appliance from a management system. Through the Infoblox GUI, you can set up and administer the appliance. For management system requirements and access instructions, see Accessing the Infoblox Appliance .