1
As suggested by title: is there possibility that after a successful DHCP session, DNS server is not configured?
lang2
Posted 2012-07-16T07:40:05.010
Reputation: 1 830
DHCP: is DNS configuration optional?
Answers
3
Yes. A DHCP server is not required to provide DNS information when it leases an IP address.
RFC2131 section 4.3.1:
The server MUST supply as many of the requested parameters as possible and MUST omit any parameters it cannot provide.
So technically, it is required to provide them if requested and if it can provide them. But it need not provide DNS information if it cannot provide them or if the client doesn't specifically request them.
David Schwartz
Posted 2012-07-16T07:40:05.010
Reputation: 58 310
What is the host name if I ping -a a leased static IP? – Sun – 2016-05-27T01:46:20.913
is there a reference? – lang2 – 2012-07-16T08:21:55.100
1RFC2131 section 4.3.1: "The server MUST supply as many of the requested parameters as possible and MUST omit any parameters it cannot provide." (So technically, it is required to provide them if requested and if it can provide them. But it need not provide DNS information if it cannot provide them or if the client doesn't specifically request them.) – David Schwartz – 2012-07-16T08:26:46.233
Are you asking if DHCP can lease addresses without giving DNS information? – VBwhatnow – 2012-07-16T08:08:40.767