Users Guide

On an Aggregator, the internal ports support FCoE connectivity and connects to the converged network

adapter (CNA) in servers. FCoE allows Fiber Channel to use 10-Gigabit Ethernet networks while

preserving the Fiber Channel protocol.

The Aggregator also provides zero-touch configuration for FCoE connectivity. The Aggregator auto-

configures to match the FCoE settings used in the switches to which it connects through its uplink ports.

FIP snooping is automatically configured on an Aggregator. The auto-configured port channel (LAG 128)

operates in FCF port mode.

iSCSI Operation

Support for iSCSI traffic is turned on by default when the Aggregator powers up. No configuration is

required.

When an 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 autoconfigures 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.

Link Aggregation

All uplink ports are configured in a single LAG (LAG 128). Server-facing ports are auto-configured as part

of link aggregation groups if the corresponding server is configured for LACP-based network interface

controller (NIC) teaming. Static LAGs are not supported.

NOTE: The recommended LACP timeout is Long-Timeout mode.

Link Tracking

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 after the specified defer-timer interval, which is 10 seconds by default. If you have

configured VLAN, you can reduce the defer time by changing the defer-timer value or remove it by using

the no defer-timer command.

NOTE: If installed servers do not have connectivity to a switch, check the Link Status LED of uplink

ports on the aggregator. If all LEDs are on, to ensure the LACP is correctly configured, check the

LACP configuration on the ToR switch that is connected to the aggregator .

Before You Start