Dell N3200-ON Networking N-Series Switches User Guide version 6.8.0 - Page 600

Traffic Monitoring Examples This section contains the following examples: • Showing Interface Traffic • Configuring sFlow • Configuring RMON • Configuring Remote Capture • Configuring RSPAN Showing Interface Traffic Use the show interfaces utilization and show interfaces traffic commands to display information about interface traffic and internal packet buffer usage. The following are examples of the output of these commands. Refer to the Dell Networking N1108EP-ON, N1500, N2200-ON, and N3200-ON Series Switches CLI Reference Guide for more details about the output. The N1108EP-ON Series switches do not support accounting for color drops. The counters remain fixed at 0. This example shows Gi1/0/1 is suffering from congestion (Tx Queue high) and is dropping packets, either due to WRED drops or due to exceeding the internal buffer limits. console#show interfaces traffic Intf Congestion Tx Queue Rx Queue Name Drops (Pkts) (Cells) (Cells) Gi1/0/1 18981 132 0 Gi1/0/2 0 0 0 Gi1/0/3 0 0 0 Color Drops (Pkts) Tx Queue Yellow Red (Pkts) 0 0 13 0 0 0 0 0 0 The following example shows a classical incast situation on interface Gi1/0/2 where the port is fully utilized or nearly fully utilized, buffering many frames (with increased latency) and beginning to drop frames as the internal thresholds for buffering on the port are reached. A conscientious network operator might want to examine why the devices attached to Gi1/0/5 and Gi1/0/6 are sending so much traffic to Gi1/0/2 attached devices and redistribute the devices, rate-limit traffic egressing the devices attached to Gi1/0/5 and Gi1/0/6, or increase the number of links available for the device attached to Gi1/0/2. 600 Monitoring Switch Traffic