Dell PowerEdge M420 Dell PowerConnect M8024-k User's Configuration Guide - Page 79
Priority-based Flow Control (PFC), Internet Small Computer System Interface (iSCSI) Optimization
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Priority-based Flow Control (PFC) NOTE: PFC is supported only on the PCM8024-k. The PCM6220, PCM6348, and PCM8024 switches do not support PFC. The Priority-based Flow Control feature allows the user to pause or inhibit transmission of individual priorities within a single physical link. By configuring PFC to pause a congested priority (priorities) independently, protocols that are highly loss sensitive can share the same link with traffic that has different loss tolerances. Priorities are differentiated by the priority field of the 802.1Q VLAN header. NOTE: An interface that is configured for PFC is automatically disabled for 802.3x flow control. For information about configuring the PFC feature, see "Configuring PortBased Traffic Control" on page 691. Internet Small Computer System Interface (iSCSI) Optimization NOTE: iSCSI is supported on the PCM6348, PCM8024, and PCM8024-k switches. The M6220 switch does not support iSCSI. 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 439. Switch Features 79
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1,203
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1,204
-
1,205
-
1,206
-
1,207
-
1,208
-
1,209
-
1,210
-
1,211
-
1,212
-
1,213
-
1,214
-
1,215
-
1,216
-
1,217
-
1,218
-
1,219
-
1,220
-
1,221
-
1,222
-
1,223
-
1,224
-
1,225
-
1,226
-
1,227
-
1,228
-
1,229
-
1,230
-
1,231
-
1,232
-
1,233
-
1,234
-
1,235
-
1,236
-
1,237
-
1,238
-
1,239
-
1,240
-
1,241
-
1,242
-
1,243
-
1,244
-
1,245
-
1,246