Qos; Virtual Port Channels; Serviceability; Switched Port Analyzer - Cisco Nexus 5500 Series Configuration Manual

QoS

QoS

Cisco Nexus devices provide quality of service (QoS) capabilities such as traffic prioritization and bandwidth
allocation on egress interfaces.
The default QoS configuration on the switch provides lossless service for Fibre Channel and FCoE traffic.
QoS must be configured to use native FC or FCoE or FC and FCoE.
The following commands will enable the default QoS configuration which must be configured for native FC
or FCoE or FC and FCoE:
switch(config)# system qos
switch(config-sys-qos)# service-policy type queuing input fcoe-default-in-policy
switch(config-sys-qos)# service-policy type queuing output fcoe-default-out-policy
switch(config-sys-qos)# service-policy type qos input fcoe-default-in-policy
switch(config-sys-qos)# service-policy type network-qos fcoe-default-nq-policy
Before enabling FCoE on the Cisco Nexus 5500 Series device, you must attach the pre-defined FCoE
Note
policy maps to the type qos, type network-qos, and type queuing policy maps.

Virtual Port Channels

A virtual port channel (vPC) allows links that are physically connected to two different Cisco Nexus devices
or Cisco Nexus 2000 Series Fabric Extenders to appear as a single port channel. A vPC can provide
multipathing, which allows you to create redundancy by enabling multiple parallel paths between nodes and
load balancing traffic where alternative paths exist.

Serviceability

The Cisco Nexus device serviceability functions provide data for network planning and help to improve
problem resolution time.

Switched Port Analyzer

The switched port analyzer (SPAN) feature allows an administrator to analyze all traffic between ports by
nonintrusively directing the SPAN session traffic to a SPAN destination port that has an external analyzer
attached to it.

Ethanalyzer

Ethanalyzer is a Cisco NX-OS protocol analyzer tool based on the Wireshark (formerly Ethereal) open source
code. Ethanalyzer is a command-line version of Wireshark for capturing and decoding packets. You can use
Ethanalyzer to troubleshoot your network and analyse the control-plane traffic.
Cisco Nexus 5500 Series NX-OS Fundamentals Configuration Guide, Release 7.x
6
Overview
OL-30890-01