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FC Services
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 .
Channel group X is already an Ethernet port channel
Solution
You need to choose another number between 1 to 256 to configure the SAN port channel.
Use the show port-channel usage command to determine the numbers that were used for the existing
port channels.
Example:
show port-channel usage
Total 3 port-channel numbers used
============================================
Used : 198 - 199 , 500
Unused: 1 - 197 , 200 - 499 , 501 - 4096
(some numbers may be in use by SAN port channels)
FC Services
This section includes an overview of troubleshooting Cisco Fibre Channel Services followed by a
description of common problems and their solutions.
Overview
Fibre Channel fabrics provide a set of services for its clients, which are the Fibre Channel nodes. These
Fibre Channel services (FC services) allow the nodes to interact with the storage network to exchange
information, such as connection state, connection parameters, configuration, topology changes, and so
on.
The FC services can be accessed through login into ports that hold a well known address (WKA). WKAs
are port FC IDs that are reserved for internal use of the fabric, usually fabric services.
The following table describes the well-known addresses and the service associated with each:
(Source: www.t11.org)
Well Known Address
x'FF FC 01'
to x'FF FC FE'
x'FF FF F0'
x'FF FF F1'
to x'FF FF F3'
x'FF FF F4'
x'FF FF F5'
x'FF FF F6'
x'FF FF F7'
x'FF FF F8'
x'FF FF F9'
x'FF FF FA'
Cisco Nexus 5000 Series Troubleshooting Guide
5-16
Description
Reserved for Domain Controllers
Reserved for N_Port Controller
Reserved
Event Service (FC-GS-5)
Multicast Server (FC-PH3)
Clock Synchronization Server (FC-PH3)
Security Key Distribution Service (FC-PH3)
Alias Server (FC-PH2)
Quality of Service Facilitator-Class4 (FC-PH2)
Management Service (FC-GS-5)
Chapter 5
Troubleshooting SAN Switching Issues
OL-25300-01
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Troubleshooting
