IPv6 install is not using the resolution specified in the nsswitch file.

Products

• CA Performance Management - Usage and Administration
• DX NetOps

Issue/Introduction

Running an install with an IPv6 system and the nsswitch is configured to use files first but its using DNS. 

nsswitch entry 

hosts:      files dns myhostname

 

Environment

Release : 21.2

Component :

Cause

Although the systems nsswitch file was configured to use the hosts file first, IPv6 uses a new tag for resolution in the nsswitch file and will default to dns if the new tag is not there. 

IPv4 resolution in nsswitch: 
hosts:      files dns myhostname

IPv6 resolution nsswitch: 
ipnodes: files dns myhostname

Resolution

Add this line to the nsswitch file for resolution of IPv6 addresses: 

ipnodes:  files dns myhostname