PowerEdge: iDRAC - How to Set Up Your Network So the CMC and the iDRAC Can Dynamically Update the DNS
Summary: This article provides information about how to set up your network so the CMC and the iDRAC can dynamically update the DNS.
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Instructions
Question
The CMC or iDRAC does not dynamically update the DNS?
My CMC or iDRAC DNS Entry disappears with Scavenging turned on?
Answer
The CMC and iDRAC do not support Dynamic DNS updating as a security measure, they only register the DNS name initially when the IP Stack is configured with the IP address. For static IP this is only done once until the iDRAC is reset, if using DHCP then this happens every time the Lease expires, so your DHCP lease duration must be less than the time when you scavenge DNS entries.
On the server side, you can set up DHCP to statically or dynamically give the CMC an IP address, and set the lease duration to however long you need it to be.
On the CMC and iDRAC side, set up for to Register CMC/iDRAC on DNS and to use DHCP for DNS Domain Name.
Input your DNS CMC/iDRAC Name (if you do not want to use the default).
Affected Products
Dell Chassis Management Controller Version 2.30 For Dell PowerEdge FX2, Dell Chassis Management Controller Version 3.30 For Dell PowerEdge VRTX, Dell Chassis Management Controller Version 6.21 For Dell PowerEdge M1000e
, iDRAC7 with Lifecycle Controller Version 2.43.43.43, iDRAC7/8 with Lifecycle Controller version 2.65.65.65, iDRAC8 with Lifecycle Controller version 2.86.86.86, iDRAC9 - 7.xx Series
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Products
C Series, HS Series, Modular Infrastructure, Rack Servers, Tower Servers, XE Servers, XR Servers, OEM Server SolutionsArticle Properties
Article Number: 000138281
Article Type: How To
Last Modified: 13 May 2026
Version: 6
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