Concept Guide

The Aggregator also provides zero-touch conguration for FCoE conguration. The Aggregator auto-congures to match the FCoE

settings used in the ToR switches to which it connects through its uplink ports.

iSCSI Operation

Support for iSCSI trac is turned on by default when the Aggregator powers up. No conguration is required.

When the Aggregator powers up, it monitors known TCP ports for iSCSI storage devices on all interfaces. When a session is detected, an

entry is created and monitored as long as the session is active.

The Aggregator also detects iSCSI storage devices on all interfaces and auto-congures to optimize performance. Performance

optimization operations, such as Jumbo frame size support, and disabling storm control on interfaces connected to an iSCSI equallogic

(EQL) storage device, are applied automatically.

CLI conguration is necessary only when the conguration includes iSCSI storage devices that cannot be automatically detected and when

non-default QoS handling is required.

Link Aggregation

In Standalone, Stacking, and VLT modes, all uplink ports (except port 9 in VLT mode) are congured in a single LAG (LAG 128). There can

be multiple uplink LAGs in programmable-mux mode. Server-facing ports are auto-congured as part of link aggregation groups if the

corresponding server is congured for LACP-based NIC teaming. Static LAGs are supported only in PMUX and Full-Switch modes.

NOTE

: The default LACP timeout is Long-Timeout. The same timeout is recommended to be congured in peer devices.

Uplink Failure Detection

By default, all server-facing ports are tracked by the operational status of the uplink LAG. If the uplink LAG goes down, the Aggregator

loses its connectivity and is no longer operational; all server-facing ports are brought down.

NOTE

: If installed servers do not have connectivity to a ToR switch, check the Link Status LED of uplink ports on the Aggregator.

If all LEDs are ON, check the LACP conguration on the ToR switch that is connected to the Aggregator to ensure the LACP is

correctly congured.

VLANs

By default, all Aggregator ports belong to all 4094 VLANs and are members of untagged VLAN 1. You can use the CLI or CMC interface to

congure only the required VLANs on a port.

When you congure VLANs on server-facing interfaces (ports 1 to 8), you can assign VLANs to a port or a range of ports by entering the

vlan tagged or vlan untagged commands in interface conguration mode; for example:

Dell(conf)# interface tengigabitethernet 0/2 - 4

Dell(conf-if-range-te-0/2-4)# vlan tagged 5,7,10-12

Dell(conf-if-range-te-0/2-4)# vlan untagged 3

NOTE

: You can also use the CMC interface to congure VLANs.

Uplink LAG

Before You Start