Internet Small Computer System Interface (Iscsi) Optimization; Layer 2 Multicast Features; Mac Multicast Support; Igmp Snooping - Dell PowerConnect 7048P Manual

Powerconnect 7000 series stackable layer 2 and 3 switches

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Internet Small Computer System Interface (iSCSI) Optimization

The iSCSI Optimization feature helps give traffic between iSCSI initiator

and target systems special QoS treatment in the switch. This is accomplished

by monitoring, or snooping traffic to detect packets used by iSCSI stations in

establishing iSCSI sessions and connections. Data from these exchanges is

used to create classification rules to assign the traffic between the stations to

a configured traffic class. This affects how the packets in the flow are queued

and scheduled for egress on the destination port.

For information about configuring iSCSI settings, see "Configuring iSCSI

Optimization" on page 431.

For information about configuring L2 multicast features, see "Configuring L2

Multicast Features" on page 703.

Multicast service is a limited broadcast service that allows one-to-many and

many-to-many connections. In Layer 2 multicast services, a single frame

addressed to a specific multicast address is received, and copies of the frame

to be transmitted on each relevant port are created.

Internet Group Management Protocol (IGMP) Snooping is a feature that

allows a switch to forward multicast traffic intelligently on the switch.

Multicast IP traffic is traffic that is destined to a host group. Host groups are

identified by class D IP addresses, which range from 224.0.0.0 to

239.255.255.255. Based on the IGMP query and report messages, the switch

forwards traffic only to the ports that request the multicast traffic. This

prevents the switch from broadcasting the traffic to all ports and possibly

affecting network performance.

Switch Features