Concept Guide

Device Settings

In Dell Blade I/O Manager, you can view or configure the following settings for I/O Aggregator devices:

• Global configuration

• IOA firmware (view only)

• Network Time Protocol

• Restore IOA

Global Configuration

The Global Configuration section of the Settings page displays the following settings for the I/O

Aggregator device:

• IOA Mode:

– Standalone Mode (default) — Default mode of the I/O Aggregator device. In this mode, all ports

are configured as members of all VLANs. All VLANs are up and can send or receive Layer 2 traffic.

– Stack Mode — Multiple switches operate as single unit. A single switch in the stack (Master switch)

manages all units in the stack and uses a single IP address that you can use to manage every port

in the stack.

– VLT Mode — Virtual Link Trunking. VLT enables physical links between two chassis to appear as a

single virtual link to the network core or other switches such as Edge, Access, or ToR. VLT reduces

the role of Spanning Tree protocols by allowing LAG terminations on two separate distribution or

core switches, and by supporting a loop free topology. VLT institutes Layer 2 multipathing,

creating redundancy through increased bandwidth, enabling multiple parallel paths between

nodes and load-balancing traffic where alternative paths exist.

– Programmable MUX Mode — Programmable Multiplex mode. This mode provides flexibility of

operation with added configurability. This mode creates multiple LAGs, configuring VLANs on

uplinks and the server side, and configuring data center bridging (DCB) parameters. Programmable

MUX mode supports both stacking and VLT operations. You can make any configuration or

provisioning of the device through the CLI.

– Full Switch — All commands and configurations supported on MXL available in this mode. This

mode offers Layer 2/Layer 3 switching functionalities on the Dell FX2 chassis.

NOTE: This mode is only available for FN IOA for FX2 chassis devices.

• Broadcast Storm Control — Enabled or Disabled. Broadcast storm control causes the device to limit

or stop forwarding all broadcast traffic if they consume bandwidth beyond a configured threshold.

• IGMP Flood Restrict — Enabled or Disabled. When enabled, unregistered multicast data traffic is

forwarded to only multicast router ports on all VLANs. If there is no multicast router port in a VLAN,

unregistered multicast data traffic is dropped.

• Auto LAG — Enabled or Disabled. Determines if the device automatically assigns internal ports to Link

Aggregation Groups.

• Default VLAN — Default VLAN to which the device assigns ports.