Registers And Counters - Cisco N5K-M1600 - Expansion Module - 6 Ports Troubleshooting Manual

Registers and Counters

S e n d d o c u m e n t c o m m e n t s t o n e x u s 5 k - d o c f e e d b a c k @ c i s c o . c o m .
No drop class not created on N2K-C2148T/N2K-C2248TP-1GE based FEX with
default QoS configuration
The no-drop class is not created on the N2K-C2148T/N2K-C2248TP-1GE based FEX with the default
QoS configuration.
The show queuing interface is different for the switchport and HIF port on N2K-C2248TP and
N2K-C2148T.
Possible Cause
FCoE is not supported on the N2K-C2148T and N2K-C2248TP-1GE based FEX and the no drop class
is not created with the default QoS configuration.
Use the following command to verify (check for no-drop class):
show queuing interface eth100/1/1
Solution
If you want an ethernet no-drop class on a N2K-C2148T/N2K-C2248TP-1GE FEX, then you have to
create an ethernet no-drop class with the following:
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How to enable link pause (flow control) on Nexus 5000 interface
Configuring "lowcontrol send on and flowcontrol receive on does not enable flowcontrol on on Nexus
5000 switch port links when connected to another Nexus 5000 interface.
Possible Cause
By default, the DCBX runs on the Nexus 5000 interface. If the peer does not run DCBX, then the
interface is configured for tail-drop.
Use one of the following commands to verify:
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Solution
Use the following commands under interface ethx/y to enable link pause:
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Registers and Counters
The following are the commands to access various registers and counters:
Cisco Nexus 5000 Series Troubleshooting Guide
4-10
Policy-map type network-qos no-drop
Class type network-qos class-0
Pause no-drop
Use the show interface ethx/y flowcontrol command and check to see if the operating state is off.
Use the show interface ethx/y priority-flow-control command and check to see the if operating
state is off.
flowcontrol receive on
flowcontrol send on
Chapter 4 Troubleshooting QoS Issues
OL-25300-01