Iscsi operation, Link aggregation, Link tracking – Dell PowerEdge FX2/FX2s User Manual

Page 18: Configuring vlans

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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 from UPLINK-STATE-GROUP mode.

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.

Configuring VLANs

By default, in Standalone mode, all aggregator ports belong to all 4094 VLANs and are members of

untagged VLAN 1. To configure only the required VLANs on a port, use the CLI or CMC interface.
You can configure VLANs only on server ports. The uplink LAG will automatically get the VLANs, based on
the server ports VLAN configuration.

When you configure VLANs on server-facing interfaces (ports from 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
Configuration mode; for example:
Dell(conf)# interface range 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

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Before You Start

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