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Dell PowerEdge M820 Systems Notas de lançamento
Tail drop and WRED parameters are specified individually for each supported drop precedence level.
In addition, the following are specified on a per-interface basis:
queue management type: tail drop vs. WRED (only if per-queue configuration is not supported)
WRED decay exponent
Switch administrators should remember to configure ingress ports as trusted or un-trusted. By default ingress ports trust
dot1p values.
 Stack Firmware Synchronization
Stack firmware synchronization updates all stack members to the active firmware version on the master switch. Stack
firmware synchronization is enabled by default. Stack firmware downgrade is enabled by default.
 Multicast VLAN Registration
Multicast VLAN Registration provides a method of coalescing multicast traffic requested by users on multiple VLANs
onto a single VLAN when carried over the network.
MVR does not require that either source or receiver ports utilize VLAN tagging.
Network planners are reminded that multicast groups in the 224.0.0.x range are reserved for multicast control plane
traffic. Network planners should select multicast groups in another range for normal multicast traffic, e.g. 239.0.1.x
 iSCSI Optimization
iSCSI Optimization automatically configures ports for use with the iSCSI protocol and tracks iSCSI sessions on the
PowerConnect 7000 and 8000 Series switches as well as the PCM6348. Dell EqualLogic arrays are automatically
detected and configuration of Dell EqualLogic connected ports is performed automatically.
Administrators are advised that the configuration performed by enabling iSCSI optimization is not automatically
reversed on disabling the feature. The administrator will need to manually remove the configuration settings when
migrating Dell EqualLogic servers or iSCSI initiator ports to other ports or switches.
Detection of Dell EqualLogic arrays is keyed on receipt of the mandatory System Description TLV in the LLDP
packet. Disabling LLDP will effectively disable Dell EqualLogic array detection.
Dell EqualLogic arrays are required to be upgraded to firmware 5.0.2 or later in order to use the iSCSI Optimization
feature.
 LLDP
Administrators should ensure that LLDP-MED is enabled in order to operate EEE. Disabling LLDP or LLDP-MED
will effectively disable EEE, IEEE 802.3at PoE+ high power negotiation and Dell EqualLogic array detection in the
iSCSI Optimization feature.
 Connectivity Fault Management
Connectivity Fault Management performs Metro Ethernet maintenance functions. Dell PowerConnect CFM supports
the following functions defined in IEEE 802.1ag Draft 8.1:
Path discovery (link trace messages)
Fault detection (continuity check message)
Fault verification and isolation (loopback and link trace messages)
Fault notification (alarm indication signal or SNMP trap).
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System Firmware Version 4.1.0.6