How to configure DNS for APIC ?
Configuration of DNS for APIC is done under Fabric -> fabric Policies tab. Then in navigation pane go to
Global Policies -> DNS profile à Default.
In the work pane, you can add DNS providers (those are the ip addresses of the DNS servers) and DNS domains.
This is sufficient to have DNS configured on the APIC
This is illustrated below:
Important Note:
- DNS settings for DNS access from the APIC MUST use the default DNS profile. A user created DNS profile can’t be use for that, User define DNS profiles are only usefull for Tenant DNS access.
- Those user Define DNS profiles can be bound to a tenant in Tenant tab, Tenantname -> networking -> private network -> DNS profile labels.
- At the time of this writing (1st August 2014), DNS access from leaves and spines is not working.
Verifying DNS configuration on APIC
Ssh to the APIC and check :
admin@apic1:~> cat /etc/resolv.conf
# Generated by IFC
search cisco.com
nameserver 171.70.168.183
nameserver 173.36.131.10
This should list the DNS servers configured and you should be able to contact any hosts by its name:
admin@apic1:~> ping www.cisco.com
PING origin-www.cisco.com (72.163.4.161) 56(84) bytes of data.
64 bytes from www1.cisco.com (72.163.4.161): icmp_seq=1 ttl=234 time=124 ms
64 bytes from www1.cisco.com (72.163.4.161): icmp_seq=2 ttl=234 time=124 ms
^C
--- origin-www.cisco.com ping statistics ---
2 packets transmitted, 2 received, 0% packet loss, time 1639ms
rtt min/avg/max/mdev = 124.361/124.503/124.645/0.142 ms
admin@apic1:~>
