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Cisco Bug: CSCtd18750 - unset domain name from CLI

Last Modified

Feb 22, 2014

Products (1)

  • Cisco Unified Communications Manager (CallManager)

Known Affected Releases

7.0(2)

Description (partial)

Symptom:

From CLI of CUCM we allow setting a domain name when DNS is not configured, however there is not CLI command to unset the domain name.

Conditions:

it's possible to set a domainname without providing DNS servers. (7.0.2)
 
The file /etc/nsswitch.conf secton "hosts: " is changed from "hosts: files" to "hosts: files dns" which makes Informix and hence also DBL Monitor fail.
This leads to different services not starting anymore.
 
cat /etc/nsswitch.conf | grep hosts:
#hosts:     db files ldap nis dns
hosts:      files dns
[root@budapest ~]# 
 
And there is no way to:
 
1. Check the content of /etc/nsswitch.conf via admin CLI
2. Seems to be no way to unset the domainname since we have no DNS server set
 
=> We've just put our system into an unusable state we can't fix without going into root (unless we configure a DNS server and delete it).
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